src/HOL/Library/refute.ML
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(*  Title:      HOL/Library/refute.ML
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    Author:     Tjark Weber, TU Muenchen
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Finite model generation for HOL formulas, using a SAT solver.
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*)
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(* ------------------------------------------------------------------------- *)
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(* Declares the 'REFUTE' signature as well as a structure 'Refute'.          *)
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(* Documentation is available in the Isabelle/Isar theory 'HOL/Refute.thy'.  *)
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(* ------------------------------------------------------------------------- *)
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signature REFUTE =
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sig
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  exception REFUTE of string * string
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(* ------------------------------------------------------------------------- *)
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(* Model/interpretation related code (translation HOL -> propositional logic *)
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(* ------------------------------------------------------------------------- *)
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  type params
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  type interpretation
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  type model
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  type arguments
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  exception MAXVARS_EXCEEDED
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  val add_interpreter : string -> (Proof.context -> model -> arguments -> term ->
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    (interpretation * model * arguments) option) -> theory -> theory
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  val add_printer : string -> (Proof.context -> model -> typ ->
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    interpretation -> (int -> bool) -> term option) -> theory -> theory
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  val interpret : Proof.context -> model -> arguments -> term ->
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    (interpretation * model * arguments)
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  val print : Proof.context -> model -> typ -> interpretation -> (int -> bool) -> term
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  val print_model : Proof.context -> model -> (int -> bool) -> string
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(* ------------------------------------------------------------------------- *)
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(* Interface                                                                 *)
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(* ------------------------------------------------------------------------- *)
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  val set_default_param  : (string * string) -> theory -> theory
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  val get_default_param  : Proof.context -> string -> string option
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  val get_default_params : Proof.context -> (string * string) list
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  val actual_params      : Proof.context -> (string * string) list -> params
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  val find_model :
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    Proof.context -> params -> term list -> term -> bool -> string
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  (* tries to find a model for a formula: *)
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  val satisfy_term :
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    Proof.context -> (string * string) list -> term list -> term -> string
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  (* tries to find a model that refutes a formula: *)
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  val refute_term :
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    Proof.context -> (string * string) list -> term list -> term -> string
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  val refute_goal :
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    Proof.context -> (string * string) list -> thm -> int -> string
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  val setup : theory -> theory
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(* ------------------------------------------------------------------------- *)
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(* Additional functions used by Nitpick (to be factored out)                 *)
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(* ------------------------------------------------------------------------- *)
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  val get_classdef : theory -> string -> (string * term) option
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  val norm_rhs : term -> term
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  val get_def : theory -> string * typ -> (string * term) option
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  val get_typedef : theory -> typ -> (string * term) option
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  val is_IDT_constructor : theory -> string * typ -> bool
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  val is_IDT_recursor : theory -> string * typ -> bool
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  val is_const_of_class: theory -> string * typ -> bool
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  val string_of_typ : typ -> string
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end;
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structure Refute : REFUTE =
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struct
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open Prop_Logic;
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(* We use 'REFUTE' only for internal error conditions that should    *)
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(* never occur in the first place (i.e. errors caused by bugs in our *)
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(* code).  Otherwise (e.g. to indicate invalid input data) we use    *)
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(* 'error'.                                                          *)
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exception REFUTE of string * string;  (* ("in function", "cause") *)
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(* should be raised by an interpreter when more variables would be *)
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(* required than allowed by 'maxvars'                              *)
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exception MAXVARS_EXCEEDED;
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(* ------------------------------------------------------------------------- *)
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(* TREES                                                                     *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* tree: implements an arbitrarily (but finitely) branching tree as a list   *)
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(*       of (lists of ...) elements                                          *)
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(* ------------------------------------------------------------------------- *)
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datatype 'a tree =
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    Leaf of 'a
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  | Node of ('a tree) list;
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fun tree_map f tr =
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  case tr of
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    Leaf x  => Leaf (f x)
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  | Node xs => Node (map (tree_map f) xs);
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fun tree_pair (t1, t2) =
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  case t1 of
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    Leaf x =>
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      (case t2 of
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          Leaf y => Leaf (x,y)
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        | Node _ => raise REFUTE ("tree_pair",
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            "trees are of different height (second tree is higher)"))
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  | Node xs =>
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      (case t2 of
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          (* '~~' will raise an exception if the number of branches in   *)
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          (* both trees is different at the current node                 *)
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          Node ys => Node (map tree_pair (xs ~~ ys))
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        | Leaf _  => raise REFUTE ("tree_pair",
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            "trees are of different height (first tree is higher)"));
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(* ------------------------------------------------------------------------- *)
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(* params: parameters that control the translation into a propositional      *)
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(*         formula/model generation                                          *)
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(*                                                                           *)
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(* The following parameters are supported (and required (!), except for      *)
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(* "sizes" and "expect"):                                                    *)
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(*                                                                           *)
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(* Name          Type    Description                                         *)
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(*                                                                           *)
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(* "sizes"       (string * int) list                                         *)
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(*                       Size of ground types (e.g. 'a=2), or depth of IDTs. *)
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(* "minsize"     int     If >0, minimal size of each ground type/IDT depth.  *)
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(* "maxsize"     int     If >0, maximal size of each ground type/IDT depth.  *)
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(* "maxvars"     int     If >0, use at most 'maxvars' Boolean variables      *)
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(*                       when transforming the term into a propositional     *)
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(*                       formula.                                            *)
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(* "maxtime"     int     If >0, terminate after at most 'maxtime' seconds.   *)
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(* "satsolver"   string  SAT solver to be used.                              *)
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(* "no_assms"    bool    If "true", assumptions in structured proofs are     *)
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(*                       not considered.                                     *)
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(* "expect"      string  Expected result ("genuine", "potential", "none", or *)
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(*                       "unknown").                                         *)
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(* ------------------------------------------------------------------------- *)
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type params =
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  {
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    sizes    : (string * int) list,
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    minsize  : int,
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    maxsize  : int,
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    maxvars  : int,
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    maxtime  : int,
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    satsolver: string,
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    no_assms : bool,
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    expect   : string
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  };
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(* ------------------------------------------------------------------------- *)
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(* interpretation: a term's interpretation is given by a variable of type    *)
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(*                 'interpretation'                                          *)
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(* ------------------------------------------------------------------------- *)
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type interpretation =
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  prop_formula list tree;
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(* ------------------------------------------------------------------------- *)
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(* model: a model specifies the size of types and the interpretation of      *)
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(*        terms                                                              *)
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(* ------------------------------------------------------------------------- *)
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type model =
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  (typ * int) list * (term * interpretation) list;
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(* ------------------------------------------------------------------------- *)
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(* arguments: additional arguments required during interpretation of terms   *)
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(* ------------------------------------------------------------------------- *)
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type arguments =
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  {
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    (* just passed unchanged from 'params': *)
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    maxvars   : int,
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    (* whether to use 'make_equality' or 'make_def_equality': *)
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    def_eq    : bool,
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    (* the following may change during the translation: *)
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    next_idx  : int,
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    bounds    : interpretation list,
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    wellformed: prop_formula
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  };
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structure Data = Theory_Data
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(
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  type T =
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    {interpreters: (string * (Proof.context -> model -> arguments -> term ->
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      (interpretation * model * arguments) option)) list,
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     printers: (string * (Proof.context -> model -> typ -> interpretation ->
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      (int -> bool) -> term option)) list,
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     parameters: string Symtab.table};
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  val empty = {interpreters = [], printers = [], parameters = Symtab.empty};
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  val extend = I;
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  fun merge
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    ({interpreters = in1, printers = pr1, parameters = pa1},
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     {interpreters = in2, printers = pr2, parameters = pa2}) : T =
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    {interpreters = AList.merge (op =) (K true) (in1, in2),
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     printers = AList.merge (op =) (K true) (pr1, pr2),
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     parameters = Symtab.merge (op =) (pa1, pa2)};
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);
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val get_data = Data.get o Proof_Context.theory_of;
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(* ------------------------------------------------------------------------- *)
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(* interpret: interprets the term 't' using a suitable interpreter; returns  *)
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(*            the interpretation and a (possibly extended) model that keeps  *)
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(*            track of the interpretation of subterms                        *)
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(* ------------------------------------------------------------------------- *)
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fun interpret ctxt model args t =
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  case get_first (fn (_, f) => f ctxt model args t)
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      (#interpreters (get_data ctxt)) of
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    NONE => raise REFUTE ("interpret",
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      "no interpreter for term " ^ quote (Syntax.string_of_term ctxt t))
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  | SOME x => x;
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(* ------------------------------------------------------------------------- *)
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(* print: converts the interpretation 'intr', which must denote a term of    *)
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(*        type 'T', into a term using a suitable printer                     *)
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(* ------------------------------------------------------------------------- *)
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fun print ctxt model T intr assignment =
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  case get_first (fn (_, f) => f ctxt model T intr assignment)
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      (#printers (get_data ctxt)) of
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    NONE => raise REFUTE ("print",
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      "no printer for type " ^ quote (Syntax.string_of_typ ctxt T))
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  | SOME x => x;
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(* ------------------------------------------------------------------------- *)
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(* print_model: turns the model into a string, using a fixed interpretation  *)
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(*              (given by an assignment for Boolean variables) and suitable  *)
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(*              printers                                                     *)
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(* ------------------------------------------------------------------------- *)
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fun print_model ctxt model assignment =
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  let
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    val (typs, terms) = model
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    val typs_msg =
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      if null typs then
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        "empty universe (no type variables in term)\n"
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      else
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        "Size of types: " ^ commas (map (fn (T, i) =>
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          Syntax.string_of_typ ctxt T ^ ": " ^ string_of_int i) typs) ^ "\n"
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    val show_consts_msg =
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      if not (Config.get ctxt show_consts) andalso Library.exists (is_Const o fst) terms then
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        "enable \"show_consts\" to show the interpretation of constants\n"
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      else
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        ""
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    val terms_msg =
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      if null terms then
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        "empty interpretation (no free variables in term)\n"
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      else
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        cat_lines (map_filter (fn (t, intr) =>
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          (* print constants only if 'show_consts' is true *)
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          if Config.get ctxt show_consts orelse not (is_Const t) then
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            SOME (Syntax.string_of_term ctxt t ^ ": " ^
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              Syntax.string_of_term ctxt
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                (print ctxt model (Term.type_of t) intr assignment))
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          else
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            NONE) terms) ^ "\n"
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  in
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    typs_msg ^ show_consts_msg ^ terms_msg
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  end;
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(* ------------------------------------------------------------------------- *)
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(* PARAMETER MANAGEMENT                                                      *)
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(* ------------------------------------------------------------------------- *)
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fun add_interpreter name f = Data.map (fn {interpreters, printers, parameters} =>
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  case AList.lookup (op =) interpreters name of
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    NONE => {interpreters = (name, f) :: interpreters,
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      printers = printers, parameters = parameters}
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  | SOME _ => error ("Interpreter " ^ name ^ " already declared"));
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fun add_printer name f = Data.map (fn {interpreters, printers, parameters} =>
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  case AList.lookup (op =) printers name of
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    NONE => {interpreters = interpreters,
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      printers = (name, f) :: printers, parameters = parameters}
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  | SOME _ => error ("Printer " ^ name ^ " already declared"));
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(* ------------------------------------------------------------------------- *)
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(* set_default_param: stores the '(name, value)' pair in Data's              *)
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(*                    parameter table                                        *)
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(* ------------------------------------------------------------------------- *)
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fun set_default_param (name, value) = Data.map
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  (fn {interpreters, printers, parameters} =>
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    {interpreters = interpreters, printers = printers,
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      parameters = Symtab.update (name, value) parameters});
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(* ------------------------------------------------------------------------- *)
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(* get_default_param: retrieves the value associated with 'name' from        *)
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(*                    Data's parameter table                                 *)
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(* ------------------------------------------------------------------------- *)
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val get_default_param = Symtab.lookup o #parameters o get_data;
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(* ------------------------------------------------------------------------- *)
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(* get_default_params: returns a list of all '(name, value)' pairs that are  *)
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(*                     stored in Data's parameter table                      *)
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(* ------------------------------------------------------------------------- *)
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val get_default_params = Symtab.dest o #parameters o get_data;
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(* ------------------------------------------------------------------------- *)
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(* actual_params: takes a (possibly empty) list 'params' of parameters that  *)
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(*      override the default parameters currently specified, and             *)
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(*      returns a record that can be passed to 'find_model'.                 *)
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(* ------------------------------------------------------------------------- *)
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fun actual_params ctxt override =
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  let
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    fun read_bool (parms, name) =
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      case AList.lookup (op =) parms name of
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        SOME "true" => true
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      | SOME "false" => false
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      | SOME s => error ("parameter " ^ quote name ^
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          " (value is " ^ quote s ^ ") must be \"true\" or \"false\"")
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      | NONE   => error ("parameter " ^ quote name ^
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          " must be assigned a value")
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    fun read_int (parms, name) =
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      case AList.lookup (op =) parms name of
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        SOME s =>
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          (case Int.fromString s of
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            SOME i => i
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          | NONE   => error ("parameter " ^ quote name ^
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            " (value is " ^ quote s ^ ") must be an integer value"))
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      | NONE => error ("parameter " ^ quote name ^
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          " must be assigned a value")
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    fun read_string (parms, name) =
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      case AList.lookup (op =) parms name of
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        SOME s => s
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      | NONE => error ("parameter " ^ quote name ^
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        " must be assigned a value")
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    (* 'override' first, defaults last: *)
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    val allparams = override @ get_default_params ctxt
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    val minsize = read_int (allparams, "minsize")
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    val maxsize = read_int (allparams, "maxsize")
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    val maxvars = read_int (allparams, "maxvars")
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    val maxtime = read_int (allparams, "maxtime")
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    val satsolver = read_string (allparams, "satsolver")
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    val no_assms = read_bool (allparams, "no_assms")
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    val expect = the_default "" (AList.lookup (op =) allparams "expect")
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    (* all remaining parameters of the form "string=int" are collected in *)
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    (* 'sizes'                                                            *)
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    (* TODO: it is currently not possible to specify a size for a type    *)
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    (*       whose name is one of the other parameters (e.g. 'maxvars')   *)
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    (* (string * int) list *)
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    val sizes = map_filter
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      (fn (name, value) => Option.map (pair name) (Int.fromString value))
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      (filter (fn (name, _) => name<>"minsize" andalso name<>"maxsize"
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        andalso name<>"maxvars" andalso name<>"maxtime"
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        andalso name<>"satsolver" andalso name<>"no_assms") allparams)
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  in
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    {sizes=sizes, minsize=minsize, maxsize=maxsize, maxvars=maxvars,
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      maxtime=maxtime, satsolver=satsolver, no_assms=no_assms, expect=expect}
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  end;
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(* ------------------------------------------------------------------------- *)
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(* TRANSLATION HOL -> PROPOSITIONAL LOGIC, BOOLEAN ASSIGNMENT -> MODEL       *)
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(* ------------------------------------------------------------------------- *)
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val typ_of_dtyp = Nitpick_Util.typ_of_dtyp
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val close_form = ATP_Util.close_form
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val monomorphic_term = ATP_Util.monomorphic_term
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val specialize_type = ATP_Util.specialize_type
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(* ------------------------------------------------------------------------- *)
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(* is_const_of_class: returns 'true' iff 'Const (s, T)' is a constant that   *)
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(*                    denotes membership to an axiomatic type class          *)
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(* ------------------------------------------------------------------------- *)
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fun is_const_of_class thy (s, _) =
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  let
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    val class_const_names = map Logic.const_of_class (Sign.all_classes thy)
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  in
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    (* I'm not quite sure if checking the name 's' is sufficient, *)
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    (* or if we should also check the type 'T'.                   *)
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54b64d4ad524 farewell to old-style mem infixes -- type inference in situations with mem_int and mem_string should provide enough information to resolve the type of (op =)
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    member (op =) class_const_names s
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  end;
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(* ------------------------------------------------------------------------- *)
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(* is_IDT_constructor: returns 'true' iff 'Const (s, T)' is the constructor  *)
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(*                     of an inductive datatype in 'thy'                     *)
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(* ------------------------------------------------------------------------- *)
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fun is_IDT_constructor thy (s, T) =
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  (case body_type T of
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    Type (s', _) =>
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      (case Datatype.get_constrs thy s' of
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        SOME constrs =>
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          List.exists (fn (cname, cty) =>
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            cname = s andalso Sign.typ_instance thy (T, cty)) constrs
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      | NONE => false)
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  | _  => false);
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   408
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
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(* ------------------------------------------------------------------------- *)
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   410
(* is_IDT_recursor: returns 'true' iff 'Const (s, T)' is the recursion       *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   411
(*                  operator of an inductive datatype in 'thy'               *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   412
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   413
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
   414
fun is_IDT_recursor thy (s, _) =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   415
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   416
    val rec_names = Symtab.fold (append o #rec_names o snd)
31784
bd3486c57ba3 tuned interfaces of datatype module
haftmann
parents: 31737
diff changeset
   417
      (Datatype.get_all thy) []
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   418
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   419
    (* I'm not quite sure if checking the name 's' is sufficient, *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   420
    (* or if we should also check the type 'T'.                   *)
36692
54b64d4ad524 farewell to old-style mem infixes -- type inference in situations with mem_int and mem_string should provide enough information to resolve the type of (op =)
haftmann
parents: 36555
diff changeset
   421
    member (op =) rec_names s
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   422
  end;
21985
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   423
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   424
(* ------------------------------------------------------------------------- *)
30275
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   425
(* norm_rhs: maps  f ?t1 ... ?tn == rhs  to  %t1...tn. rhs                   *)
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   426
(* ------------------------------------------------------------------------- *)
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   427
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   428
fun norm_rhs eqn =
30275
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   429
  let
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   430
    fun lambda (v as Var ((x, _), T)) t = Abs (x, T, abstract_over (v, t))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   431
      | lambda v t = raise TERM ("lambda", [v, t])
30275
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   432
    val (lhs, rhs) = Logic.dest_equals eqn
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   433
    val (_, args) = Term.strip_comb lhs
30275
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   434
  in
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   435
    fold lambda (rev args) rhs
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   436
  end
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   437
381ce8d88cb8 Reintroduced previous changes: Made "Refute.norm_rhs" public and simplified the configuration of the BerkMin and zChaff SAT solvers.
blanchet
parents: 30242
diff changeset
   438
(* ------------------------------------------------------------------------- *)
37405
7c49988afd0e avoid references to old constdefs
haftmann
parents: 37391
diff changeset
   439
(* get_def: looks up the definition of a constant                            *)
21985
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   440
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   441
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   442
fun get_def thy (s, T) =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   443
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   444
    fun get_def_ax [] = NONE
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   445
      | get_def_ax ((axname, ax) :: axioms) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   446
          (let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   447
            val (lhs, _) = Logic.dest_equals ax  (* equations only *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   448
            val c        = Term.head_of lhs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   449
            val (s', T') = Term.dest_Const c
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   450
          in
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   451
            if s=s' then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   452
              let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   453
                val typeSubs = Sign.typ_match thy (T', T) Vartab.empty
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   454
                val ax'      = monomorphic_term typeSubs ax
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   455
                val rhs      = norm_rhs ax'
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   456
              in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   457
                SOME (axname, rhs)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   458
              end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   459
            else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   460
              get_def_ax axioms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   461
          end handle ERROR _         => get_def_ax axioms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   462
                   | TERM _          => get_def_ax axioms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   463
                   | Type.TYPE_MATCH => get_def_ax axioms)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   464
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   465
    get_def_ax (Theory.all_axioms_of thy)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   466
  end;
21985
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   467
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   468
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   469
(* get_typedef: looks up the definition of a type, as created by "typedef"   *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   470
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   471
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   472
fun get_typedef thy T =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   473
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   474
    fun get_typedef_ax [] = NONE
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   475
      | get_typedef_ax ((axname, ax) :: axioms) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   476
          (let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   477
            fun type_of_type_definition (Const (s', T')) =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   478
                  if s'= @{const_name type_definition} then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   479
                    SOME T'
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   480
                  else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   481
                    NONE
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   482
              | type_of_type_definition (Free _) = NONE
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   483
              | type_of_type_definition (Var _) = NONE
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   484
              | type_of_type_definition (Bound _) = NONE
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   485
              | type_of_type_definition (Abs (_, _, body)) =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   486
                  type_of_type_definition body
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   487
              | type_of_type_definition (t1 $ t2) =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   488
                  (case type_of_type_definition t1 of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   489
                    SOME x => SOME x
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   490
                  | NONE => type_of_type_definition t2)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   491
          in
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   492
            case type_of_type_definition ax of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   493
              SOME T' =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   494
                let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   495
                  val T'' = domain_type (domain_type T')
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   496
                  val typeSubs = Sign.typ_match thy (T'', T) Vartab.empty
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   497
                in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   498
                  SOME (axname, monomorphic_term typeSubs ax)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   499
                end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   500
            | NONE => get_typedef_ax axioms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   501
          end handle ERROR _         => get_typedef_ax axioms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   502
                   | TERM _          => get_typedef_ax axioms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   503
                   | Type.TYPE_MATCH => get_typedef_ax axioms)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   504
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   505
    get_typedef_ax (Theory.all_axioms_of thy)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   506
  end;
21985
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   507
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   508
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   509
(* get_classdef: looks up the defining axiom for an axiomatic type class, as *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   510
(*               created by the "axclass" command                            *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   511
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   512
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   513
fun get_classdef thy class =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   514
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   515
    val axname = class ^ "_class_def"
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   516
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   517
    Option.map (pair axname)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   518
      (AList.lookup (op =) (Theory.all_axioms_of thy) axname)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   519
  end;
21985
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   520
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   521
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   522
(* unfold_defs: unfolds all defined constants in a term 't', beta-eta        *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   523
(*              normalizes the result term; certain constants are not        *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   524
(*              unfolded (cf. 'collect_axioms' and the various interpreters  *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   525
(*              below): if the interpretation respects a definition anyway,  *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   526
(*              that definition does not need to be unfolded                 *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   527
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   528
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   529
(* Note: we could intertwine unfolding of constants and beta-(eta-)       *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   530
(*       normalization; this would save some unfolding for terms where    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   531
(*       constants are eliminated by beta-reduction (e.g. 'K c1 c2').  On *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   532
(*       the other hand, this would cause additional work for terms where *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   533
(*       constants are duplicated by beta-reduction (e.g. 'S c1 c2 c3').  *)
21985
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   534
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   535
fun unfold_defs thy t =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   536
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   537
    fun unfold_loop t =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   538
      case t of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   539
      (* Pure *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   540
        Const (@{const_name all}, _) => t
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   541
      | Const (@{const_name "=="}, _) => t
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   542
      | Const (@{const_name "==>"}, _) => t
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   543
      | Const (@{const_name TYPE}, _) => t  (* axiomatic type classes *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   544
      (* HOL *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   545
      | Const (@{const_name Trueprop}, _) => t
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   546
      | Const (@{const_name Not}, _) => t
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   547
      | (* redundant, since 'True' is also an IDT constructor *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   548
        Const (@{const_name True}, _) => t
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   549
      | (* redundant, since 'False' is also an IDT constructor *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   550
        Const (@{const_name False}, _) => t
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   551
      | Const (@{const_name undefined}, _) => t
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   552
      | Const (@{const_name The}, _) => t
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
   553
      | Const (@{const_name Hilbert_Choice.Eps}, _) => t
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   554
      | Const (@{const_name All}, _) => t
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   555
      | Const (@{const_name Ex}, _) => t
38864
4abe644fcea5 formerly unnamed infix equality now named HOL.eq
haftmann
parents: 38795
diff changeset
   556
      | Const (@{const_name HOL.eq}, _) => t
38795
848be46708dc formerly unnamed infix conjunction and disjunction now named HOL.conj and HOL.disj
haftmann
parents: 38786
diff changeset
   557
      | Const (@{const_name HOL.conj}, _) => t
848be46708dc formerly unnamed infix conjunction and disjunction now named HOL.conj and HOL.disj
haftmann
parents: 38786
diff changeset
   558
      | Const (@{const_name HOL.disj}, _) => t
38786
e46e7a9cb622 formerly unnamed infix impliciation now named HOL.implies
haftmann
parents: 38553
diff changeset
   559
      | Const (@{const_name HOL.implies}, _) => t
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   560
      (* sets *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   561
      | Const (@{const_name Collect}, _) => t
37677
c5a8b612e571 qualified constants Set.member and Set.Collect
haftmann
parents: 37603
diff changeset
   562
      | Const (@{const_name Set.member}, _) => t
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   563
      (* other optimizations *)
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
   564
      | Const (@{const_name Finite_Set.card}, _) => t
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
   565
      | Const (@{const_name Finite_Set.finite}, _) => t
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   566
      | Const (@{const_name Orderings.less}, Type ("fun", [@{typ nat},
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   567
          Type ("fun", [@{typ nat}, @{typ bool}])])) => t
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   568
      | Const (@{const_name Groups.plus}, Type ("fun", [@{typ nat},
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   569
          Type ("fun", [@{typ nat}, @{typ nat}])])) => t
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   570
      | Const (@{const_name Groups.minus}, Type ("fun", [@{typ nat},
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   571
          Type ("fun", [@{typ nat}, @{typ nat}])])) => t
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   572
      | Const (@{const_name Groups.times}, Type ("fun", [@{typ nat},
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   573
          Type ("fun", [@{typ nat}, @{typ nat}])])) => t
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
   574
      | Const (@{const_name List.append}, _) => t
36130
9a672f7d488d commented out unsound "lfp"/"gfp" handling + fixed set output syntax;
blanchet
parents: 35746
diff changeset
   575
(* UNSOUND
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   576
      | Const (@{const_name lfp}, _) => t
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   577
      | Const (@{const_name gfp}, _) => t
36130
9a672f7d488d commented out unsound "lfp"/"gfp" handling + fixed set output syntax;
blanchet
parents: 35746
diff changeset
   578
*)
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
   579
      | Const (@{const_name fst}, _) => t
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
   580
      | Const (@{const_name snd}, _) => t
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   581
      (* simply-typed lambda calculus *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   582
      | Const (s, T) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   583
          (if is_IDT_constructor thy (s, T)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   584
            orelse is_IDT_recursor thy (s, T) then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   585
            t  (* do not unfold IDT constructors/recursors *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   586
          (* unfold the constant if there is a defining equation *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   587
          else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   588
            case get_def thy (s, T) of
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
   589
              SOME ((*axname*) _, rhs) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   590
              (* Note: if the term to be unfolded (i.e. 'Const (s, T)')  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   591
              (* occurs on the right-hand side of the equation, i.e. in  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   592
              (* 'rhs', we must not use this equation to unfold, because *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   593
              (* that would loop.  Here would be the right place to      *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   594
              (* check this.  However, getting this really right seems   *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   595
              (* difficult because the user may state arbitrary axioms,  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   596
              (* which could interact with overloading to create loops.  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   597
              ((*tracing (" unfolding: " ^ axname);*)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   598
               unfold_loop rhs)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   599
            | NONE => t)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   600
      | Free _ => t
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   601
      | Var _ => t
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   602
      | Bound _ => t
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   603
      | Abs (s, T, body) => Abs (s, T, unfold_loop body)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   604
      | t1 $ t2 => (unfold_loop t1) $ (unfold_loop t2)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   605
    val result = Envir.beta_eta_contract (unfold_loop t)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   606
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   607
    result
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   608
  end;
21985
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   609
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   610
(* ------------------------------------------------------------------------- *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   611
(* collect_axioms: collects (monomorphic, universally quantified, unfolded   *)
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   612
(*                 versions of) all HOL axioms that are relevant w.r.t 't'   *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   613
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   614
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   615
(* Note: to make the collection of axioms more easily extensible, this    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   616
(*       function could be based on user-supplied "axiom collectors",     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   617
(*       similar to 'interpret'/interpreters or 'print'/printers          *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   618
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   619
(* Note: currently we use "inverse" functions to the definitional         *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   620
(*       mechanisms provided by Isabelle/HOL, e.g. for "axclass",         *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   621
(*       "typedef", "definition".  A more general approach could consider *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   622
(*       *every* axiom of the theory and collect it if it has a constant/ *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   623
(*       type/typeclass in common with the term 't'.                      *)
21985
acfb13e8819e constants are unfolded, universal quantifiers are stripped, some minor changes
webertj
parents: 21931
diff changeset
   624
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   625
(* Which axioms are "relevant" for a particular term/type goes hand in    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   626
(* hand with the interpretation of that term/type by its interpreter (see *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   627
(* way below): if the interpretation respects an axiom anyway, the axiom  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   628
(* does not need to be added as a constraint here.                        *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   629
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   630
(* To avoid collecting the same axiom multiple times, we use an           *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   631
(* accumulator 'axs' which contains all axioms collected so far.          *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   632
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   633
fun collect_axioms ctxt t =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   634
  let
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 42137
diff changeset
   635
    val thy = Proof_Context.theory_of ctxt
32950
5d5e123443b3 normalized aliases of Output operations;
wenzelm
parents: 32857
diff changeset
   636
    val _ = tracing "Adding axioms..."
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   637
    val axioms = Theory.all_axioms_of thy
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   638
    fun collect_this_axiom (axname, ax) axs =
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   639
      let
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   640
        val ax' = unfold_defs thy ax
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   641
      in
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   642
        if member (op aconv) axs ax' then axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   643
        else (tracing axname; collect_term_axioms ax' (ax' :: axs))
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   644
      end
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   645
    and collect_sort_axioms T axs =
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   646
      let
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   647
        val sort =
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   648
          (case T of
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   649
            TFree (_, sort) => sort
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   650
          | TVar (_, sort)  => sort
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   651
          | _ => raise REFUTE ("collect_axioms",
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   652
              "type " ^ Syntax.string_of_typ ctxt T ^ " is not a variable"))
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   653
        (* obtain axioms for all superclasses *)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   654
        val superclasses = sort @ maps (Sign.super_classes thy) sort
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   655
        (* merely an optimization, because 'collect_this_axiom' disallows *)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   656
        (* duplicate axioms anyway:                                       *)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   657
        val superclasses = distinct (op =) superclasses
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   658
        val class_axioms = maps (fn class => map (fn ax =>
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   659
          ("<" ^ class ^ ">", Thm.prop_of ax))
51685
385ef6706252 more standard module name Axclass (according to file name);
wenzelm
parents: 51557
diff changeset
   660
          (#axioms (Axclass.get_info thy class) handle ERROR _ => []))
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   661
          superclasses
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   662
        (* replace the (at most one) schematic type variable in each axiom *)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   663
        (* by the actual type 'T'                                          *)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   664
        val monomorphic_class_axioms = map (fn (axname, ax) =>
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   665
          (case Term.add_tvars ax [] of
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   666
            [] => (axname, ax)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   667
          | [(idx, S)] => (axname, monomorphic_term (Vartab.make [(idx, (S, T))]) ax)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   668
          | _ =>
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   669
            raise REFUTE ("collect_axioms", "class axiom " ^ axname ^ " (" ^
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   670
              Syntax.string_of_term ctxt ax ^
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   671
              ") contains more than one type variable")))
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   672
          class_axioms
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   673
      in
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   674
        fold collect_this_axiom monomorphic_class_axioms axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   675
      end
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   676
    and collect_type_axioms T axs =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   677
      case T of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   678
      (* simple types *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   679
        Type ("prop", []) => axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   680
      | Type ("fun", [T1, T2]) => collect_type_axioms T2 (collect_type_axioms T1 axs)
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
   681
      | Type (@{type_name set}, [T1]) => collect_type_axioms T1 axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   682
      (* axiomatic type classes *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   683
      | Type ("itself", [T1]) => collect_type_axioms T1 axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   684
      | Type (s, Ts) =>
31784
bd3486c57ba3 tuned interfaces of datatype module
haftmann
parents: 31737
diff changeset
   685
        (case Datatype.get_info thy s of
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
   686
          SOME _ =>  (* inductive datatype *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   687
            (* only collect relevant type axioms for the argument types *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   688
            fold collect_type_axioms Ts axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   689
        | NONE =>
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   690
          (case get_typedef thy T of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   691
            SOME (axname, ax) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   692
              collect_this_axiom (axname, ax) axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   693
          | NONE =>
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   694
            (* unspecified type, perhaps introduced with "typedecl" *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   695
            (* at least collect relevant type axioms for the argument types *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   696
            fold collect_type_axioms Ts axs))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   697
      (* axiomatic type classes *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   698
      | TFree _ => collect_sort_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   699
      (* axiomatic type classes *)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   700
      | TVar _ => collect_sort_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   701
    and collect_term_axioms t axs =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   702
      case t of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   703
      (* Pure *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   704
        Const (@{const_name all}, _) => axs
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   705
      | Const (@{const_name "=="}, _) => axs
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   706
      | Const (@{const_name "==>"}, _) => axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   707
      (* axiomatic type classes *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   708
      | Const (@{const_name TYPE}, T) => collect_type_axioms T axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   709
      (* HOL *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   710
      | Const (@{const_name Trueprop}, _) => axs
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   711
      | Const (@{const_name Not}, _) => axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   712
      (* redundant, since 'True' is also an IDT constructor *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   713
      | Const (@{const_name True}, _) => axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   714
      (* redundant, since 'False' is also an IDT constructor *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   715
      | Const (@{const_name False}, _) => axs
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   716
      | Const (@{const_name undefined}, T) => collect_type_axioms T axs
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   717
      | Const (@{const_name The}, T) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   718
          let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   719
            val ax = specialize_type thy (@{const_name The}, T)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   720
              (the (AList.lookup (op =) axioms "HOL.the_eq_trivial"))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   721
          in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   722
            collect_this_axiom ("HOL.the_eq_trivial", ax) axs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   723
          end
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
   724
      | Const (@{const_name Hilbert_Choice.Eps}, T) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   725
          let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   726
            val ax = specialize_type thy (@{const_name Hilbert_Choice.Eps}, T)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   727
              (the (AList.lookup (op =) axioms "Hilbert_Choice.someI"))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   728
          in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   729
            collect_this_axiom ("Hilbert_Choice.someI", ax) axs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   730
          end
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   731
      | Const (@{const_name All}, T) => collect_type_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   732
      | Const (@{const_name Ex}, T) => collect_type_axioms T axs
38864
4abe644fcea5 formerly unnamed infix equality now named HOL.eq
haftmann
parents: 38795
diff changeset
   733
      | Const (@{const_name HOL.eq}, T) => collect_type_axioms T axs
38795
848be46708dc formerly unnamed infix conjunction and disjunction now named HOL.conj and HOL.disj
haftmann
parents: 38786
diff changeset
   734
      | Const (@{const_name HOL.conj}, _) => axs
848be46708dc formerly unnamed infix conjunction and disjunction now named HOL.conj and HOL.disj
haftmann
parents: 38786
diff changeset
   735
      | Const (@{const_name HOL.disj}, _) => axs
38786
e46e7a9cb622 formerly unnamed infix impliciation now named HOL.implies
haftmann
parents: 38553
diff changeset
   736
      | Const (@{const_name HOL.implies}, _) => axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   737
      (* sets *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   738
      | Const (@{const_name Collect}, T) => collect_type_axioms T axs
37677
c5a8b612e571 qualified constants Set.member and Set.Collect
haftmann
parents: 37603
diff changeset
   739
      | Const (@{const_name Set.member}, T) => collect_type_axioms T axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   740
      (* other optimizations *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   741
      | Const (@{const_name Finite_Set.card}, T) => collect_type_axioms T axs
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
   742
      | Const (@{const_name Finite_Set.finite}, T) =>
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   743
        collect_type_axioms T axs
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   744
      | Const (@{const_name Orderings.less}, T as Type ("fun", [@{typ nat},
38553
56965d8e4e11 use HOLogic.boolT and @{typ bool} more pervasively
haftmann
parents: 37677
diff changeset
   745
        Type ("fun", [@{typ nat}, @{typ bool}])])) =>
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   746
          collect_type_axioms T axs
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   747
      | Const (@{const_name Groups.plus}, T as Type ("fun", [@{typ nat},
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   748
        Type ("fun", [@{typ nat}, @{typ nat}])])) =>
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   749
          collect_type_axioms T axs
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   750
      | Const (@{const_name Groups.minus}, T as Type ("fun", [@{typ nat},
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   751
        Type ("fun", [@{typ nat}, @{typ nat}])])) =>
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   752
          collect_type_axioms T axs
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   753
      | Const (@{const_name Groups.times}, T as Type ("fun", [@{typ nat},
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
   754
        Type ("fun", [@{typ nat}, @{typ nat}])])) =>
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   755
          collect_type_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   756
      | Const (@{const_name List.append}, T) => collect_type_axioms T axs
36130
9a672f7d488d commented out unsound "lfp"/"gfp" handling + fixed set output syntax;
blanchet
parents: 35746
diff changeset
   757
(* UNSOUND
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   758
      | Const (@{const_name lfp}, T) => collect_type_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   759
      | Const (@{const_name gfp}, T) => collect_type_axioms T axs
36130
9a672f7d488d commented out unsound "lfp"/"gfp" handling + fixed set output syntax;
blanchet
parents: 35746
diff changeset
   760
*)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   761
      | Const (@{const_name fst}, T) => collect_type_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   762
      | Const (@{const_name snd}, T) => collect_type_axioms T axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   763
      (* simply-typed lambda calculus *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
   764
      | Const (s, T) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   765
          if is_const_of_class thy (s, T) then
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   766
            (* axiomatic type classes: add "OFCLASS(?'a::c, c_class)" *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   767
            (* and the class definition                               *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   768
            let
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   769
              val class = Logic.class_of_const s
31943
5e960a0780a2 renamed inclass/Inclass to of_class/OfClass, in accordance to of_sort;
wenzelm
parents: 31784
diff changeset
   770
              val of_class = Logic.mk_of_class (TVar (("'a", 0), [class]), class)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   771
              val ax_in = SOME (specialize_type thy (s, T) of_class)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   772
                (* type match may fail due to sort constraints *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   773
                handle Type.TYPE_MATCH => NONE
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   774
              val ax_1 = Option.map (fn ax => (Syntax.string_of_term ctxt ax, ax)) ax_in
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   775
              val ax_2 = Option.map (apsnd (specialize_type thy (s, T))) (get_classdef thy class)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   776
            in
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   777
              collect_type_axioms T (fold collect_this_axiom (map_filter I [ax_1, ax_2]) axs)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   778
            end
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   779
          else if is_IDT_constructor thy (s, T)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   780
            orelse is_IDT_recursor thy (s, T)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   781
          then
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   782
            (* only collect relevant type axioms *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   783
            collect_type_axioms T axs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   784
          else
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   785
            (* other constants should have been unfolded, with some *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   786
            (* exceptions: e.g. Abs_xxx/Rep_xxx functions for       *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   787
            (* typedefs, or type-class related constants            *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   788
            (* only collect relevant type axioms *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   789
            collect_type_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   790
      | Free (_, T) => collect_type_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   791
      | Var (_, T) => collect_type_axioms T axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   792
      | Bound _ => axs
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   793
      | Abs (_, T, body) => collect_term_axioms body (collect_type_axioms T axs)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   794
      | t1 $ t2 => collect_term_axioms t2 (collect_term_axioms t1 axs)
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   795
    val result = map close_form (collect_term_axioms t [])
32950
5d5e123443b3 normalized aliases of Output operations;
wenzelm
parents: 32857
diff changeset
   796
    val _ = tracing " ...done."
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   797
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   798
    result
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   799
  end;
14456
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
   800
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
   801
(* ------------------------------------------------------------------------- *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   802
(* ground_types: collects all ground types in a term (including argument     *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   803
(*               types of other types), suppressing duplicates.  Does not    *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   804
(*               return function types, set types, non-recursive IDTs, or    *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   805
(*               'propT'.  For IDTs, also the argument types of constructors *)
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
   806
(*               and all mutually recursive IDTs are considered.             *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   807
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   808
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   809
fun ground_types ctxt t =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   810
  let
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 42137
diff changeset
   811
    val thy = Proof_Context.theory_of ctxt
29272
fb3ccf499df5 use regular Term.add_XXX etc.;
wenzelm
parents: 29265
diff changeset
   812
    fun collect_types T acc =
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
   813
      (case T of
29272
fb3ccf499df5 use regular Term.add_XXX etc.;
wenzelm
parents: 29265
diff changeset
   814
        Type ("fun", [T1, T2]) => collect_types T1 (collect_types T2 acc)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   815
      | Type ("prop", []) => acc
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
   816
      | Type (@{type_name set}, [T1]) => collect_types T1 acc
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   817
      | Type (s, Ts) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   818
          (case Datatype.get_info thy s of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   819
            SOME info =>  (* inductive datatype *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   820
              let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   821
                val index = #index info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   822
                val descr = #descr info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   823
                val (_, typs, _) = the (AList.lookup (op =) descr index)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   824
                val typ_assoc = typs ~~ Ts
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   825
                (* sanity check: every element in 'dtyps' must be a *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   826
                (* 'DtTFree'                                        *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   827
                val _ = if Library.exists (fn d =>
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
   828
                  case d of Datatype.DtTFree _ => false | _ => true) typs then
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   829
                  raise REFUTE ("ground_types", "datatype argument (for type "
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   830
                    ^ Syntax.string_of_typ ctxt T ^ ") is not a variable")
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   831
                else ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   832
                (* required for mutually recursive datatypes; those need to   *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   833
                (* be added even if they are an instance of an otherwise non- *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   834
                (* recursive datatype                                         *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   835
                fun collect_dtyp d acc =
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
   836
                  let
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   837
                    val dT = typ_of_dtyp descr typ_assoc d
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
   838
                  in
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   839
                    case d of
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
   840
                      Datatype.DtTFree _ =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   841
                      collect_types dT acc
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
   842
                    | Datatype.DtType (_, ds) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   843
                      collect_types dT (fold_rev collect_dtyp ds acc)
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
   844
                    | Datatype.DtRec i =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   845
                      if member (op =) acc dT then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   846
                        acc  (* prevent infinite recursion *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   847
                      else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   848
                        let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   849
                          val (_, dtyps, dconstrs) = the (AList.lookup (op =) descr i)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   850
                          (* if the current type is a recursive IDT (i.e. a depth *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   851
                          (* is required), add it to 'acc'                        *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   852
                          val acc_dT = if Library.exists (fn (_, ds) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   853
                            Library.exists Datatype_Aux.is_rec_type ds) dconstrs then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   854
                              insert (op =) dT acc
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   855
                            else acc
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   856
                          (* collect argument types *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   857
                          val acc_dtyps = fold_rev collect_dtyp dtyps acc_dT
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   858
                          (* collect constructor types *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   859
                          val acc_dconstrs = fold_rev collect_dtyp (maps snd dconstrs) acc_dtyps
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   860
                        in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   861
                          acc_dconstrs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   862
                        end
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
   863
                  end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   864
              in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   865
                (* argument types 'Ts' could be added here, but they are also *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   866
                (* added by 'collect_dtyp' automatically                      *)
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
   867
                collect_dtyp (Datatype.DtRec index) acc
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   868
              end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   869
          | NONE =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   870
            (* not an inductive datatype, e.g. defined via "typedef" or *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   871
            (* "typedecl"                                               *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   872
            insert (op =) T (fold collect_types Ts acc))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   873
      | TFree _ => insert (op =) T acc
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   874
      | TVar _ => insert (op =) T acc)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   875
  in
29272
fb3ccf499df5 use regular Term.add_XXX etc.;
wenzelm
parents: 29265
diff changeset
   876
    fold_types collect_types t []
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   877
  end;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   878
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   879
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   880
(* string_of_typ: (rather naive) conversion from types to strings, used to   *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   881
(*                look up the size of a type in 'sizes'.  Parameterized      *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   882
(*                types with different parameters (e.g. "'a list" vs. "bool  *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   883
(*                list") are identified.                                     *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   884
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   885
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   886
fun string_of_typ (Type (s, _))     = s
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   887
  | string_of_typ (TFree (s, _))    = s
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   888
  | string_of_typ (TVar ((s,_), _)) = s;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   889
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   890
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   891
(* first_universe: returns the "first" (i.e. smallest) universe by assigning *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   892
(*                 'minsize' to every type for which no size is specified in *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   893
(*                 'sizes'                                                   *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   894
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   895
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   896
fun first_universe xs sizes minsize =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   897
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   898
    fun size_of_typ T =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   899
      case AList.lookup (op =) sizes (string_of_typ T) of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   900
        SOME n => n
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
   901
      | NONE => minsize
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   902
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   903
    map (fn T => (T, size_of_typ T)) xs
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   904
  end;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   905
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   906
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   907
(* next_universe: enumerates all universes (i.e. assignments of sizes to     *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   908
(*                types), where the minimal size of a type is given by       *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   909
(*                'minsize', the maximal size is given by 'maxsize', and a   *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   910
(*                type may have a fixed size given in 'sizes'                *)
14456
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
   911
(* ------------------------------------------------------------------------- *)
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
   912
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   913
fun next_universe xs sizes minsize maxsize =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   914
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   915
    (* creates the "first" list of length 'len', where the sum of all list *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   916
    (* elements is 'sum', and the length of the list is 'len'              *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   917
    fun make_first _ 0 sum =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   918
          if sum = 0 then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   919
            SOME []
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   920
          else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   921
            NONE
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   922
      | make_first max len sum =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   923
          if sum <= max orelse max < 0 then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   924
            Option.map (fn xs' => sum :: xs') (make_first max (len-1) 0)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   925
          else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   926
            Option.map (fn xs' => max :: xs') (make_first max (len-1) (sum-max))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   927
    (* enumerates all int lists with a fixed length, where 0<=x<='max' for *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   928
    (* all list elements x (unless 'max'<0)                                *)
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
   929
    fun next _ _ _ [] =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   930
          NONE
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   931
      | next max len sum [x] =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   932
          (* we've reached the last list element, so there's no shift possible *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   933
          make_first max (len+1) (sum+x+1)  (* increment 'sum' by 1 *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   934
      | next max len sum (x1::x2::xs) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   935
          if x1>0 andalso (x2<max orelse max<0) then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   936
            (* we can shift *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   937
            SOME (the (make_first max (len+1) (sum+x1-1)) @ (x2+1) :: xs)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   938
          else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   939
            (* continue search *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   940
            next max (len+1) (sum+x1) (x2::xs)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   941
    (* only consider those types for which the size is not fixed *)
33317
b4534348b8fd standardized filter/filter_out;
wenzelm
parents: 33246
diff changeset
   942
    val mutables = filter_out (AList.defined (op =) sizes o string_of_typ o fst) xs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   943
    (* subtract 'minsize' from every size (will be added again at the end) *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   944
    val diffs = map (fn (_, n) => n-minsize) mutables
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   945
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   946
    case next (maxsize-minsize) 0 0 diffs of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   947
      SOME diffs' =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   948
        (* merge with those types for which the size is fixed *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   949
        SOME (fst (fold_map (fn (T, _) => fn ds =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   950
          case AList.lookup (op =) sizes (string_of_typ T) of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   951
          (* return the fixed size *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   952
            SOME n => ((T, n), ds)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   953
          (* consume the head of 'ds', add 'minsize' *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   954
          | NONE   => ((T, minsize + hd ds), tl ds))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   955
          xs diffs'))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   956
    | NONE => NONE
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   957
  end;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   958
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   959
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   960
(* toTrue: converts the interpretation of a Boolean value to a propositional *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   961
(*         formula that is true iff the interpretation denotes "true"        *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   962
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   963
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   964
fun toTrue (Leaf [fm, _]) = fm
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   965
  | toTrue _ = raise REFUTE ("toTrue", "interpretation does not denote a Boolean value");
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   966
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   967
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   968
(* toFalse: converts the interpretation of a Boolean value to a              *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   969
(*          propositional formula that is true iff the interpretation        *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   970
(*          denotes "false"                                                  *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   971
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   972
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   973
fun toFalse (Leaf [_, fm]) = fm
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   974
  | toFalse _ = raise REFUTE ("toFalse", "interpretation does not denote a Boolean value");
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   975
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   976
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   977
(* find_model: repeatedly calls 'interpret' with appropriate parameters,     *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   978
(*             applies a SAT solver, and (in case a model is found) displays *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   979
(*             the model to the user by calling 'print_model'                *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   980
(* {...}     : parameters that control the translation/model generation      *)
34120
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
   981
(* assm_ts   : assumptions to be considered unless "no_assms" is specified   *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   982
(* t         : term to be translated into a propositional formula            *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   983
(* negate    : if true, find a model that makes 't' false (rather than true) *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   984
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
   985
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
   986
fun find_model ctxt
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   987
    {sizes, minsize, maxsize, maxvars, maxtime, satsolver, no_assms, expect}
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   988
    assm_ts t negate =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   989
  let
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 42137
diff changeset
   990
    val thy = Proof_Context.theory_of ctxt
33054
dd1192a96968 fixed the "expect" mechanism of Refute in the face of timeouts
blanchet
parents: 32952
diff changeset
   991
    fun check_expect outcome_code =
45387
ccffb3f9f42b return outcome code, so that it can be picked up by Mutabelle
blanchet
parents: 44121
diff changeset
   992
      if expect = "" orelse outcome_code = expect then outcome_code
33054
dd1192a96968 fixed the "expect" mechanism of Refute in the face of timeouts
blanchet
parents: 32952
diff changeset
   993
      else error ("Unexpected outcome: " ^ quote outcome_code ^ ".")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   994
    fun wrapper () =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
   995
      let
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   996
        val timer = Timer.startRealTimer ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   997
        val t =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   998
          if no_assms then t
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
   999
          else if negate then Logic.list_implies (assm_ts, t)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1000
          else Logic.mk_conjunction_list (t :: assm_ts)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1001
        val u = unfold_defs thy t
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1002
        val _ = tracing ("Unfolded term: " ^ Syntax.string_of_term ctxt u)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1003
        val axioms = collect_axioms ctxt u
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1004
        val types = fold (union (op =) o ground_types ctxt) (u :: axioms) []
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1005
        val _ = tracing ("Ground types: "
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1006
          ^ (if null types then "none."
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1007
             else commas (map (Syntax.string_of_typ ctxt) types)))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1008
        (* we can only consider fragments of recursive IDTs, so we issue a  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1009
        (* warning if the formula contains a recursive IDT                  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1010
        (* TODO: no warning needed for /positive/ occurrences of IDTs       *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1011
        val maybe_spurious = Library.exists (fn
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1012
            Type (s, _) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1013
              (case Datatype.get_info thy s of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1014
                SOME info =>  (* inductive datatype *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1015
                  let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1016
                    val index           = #index info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1017
                    val descr           = #descr info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1018
                    val (_, _, constrs) = the (AList.lookup (op =) descr index)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1019
                  in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1020
                    (* recursive datatype? *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1021
                    Library.exists (fn (_, ds) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1022
                      Library.exists Datatype_Aux.is_rec_type ds) constrs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1023
                  end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1024
              | NONE => false)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1025
          | _ => false) types
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1026
        val _ =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1027
          if maybe_spurious then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1028
            warning ("Term contains a recursive datatype; "
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1029
              ^ "countermodel(s) may be spurious!")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1030
          else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1031
            ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1032
        fun find_model_loop universe =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1033
          let
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1034
            val msecs_spent = Time.toMilliseconds (Timer.checkRealTimer timer)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1035
            val _ = maxtime = 0 orelse msecs_spent < 1000 * maxtime
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1036
                    orelse raise TimeLimit.TimeOut
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1037
            val init_model = (universe, [])
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1038
            val init_args  = {maxvars = maxvars, def_eq = false, next_idx = 1,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1039
              bounds = [], wellformed = True}
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1040
            val _ = tracing ("Translating term (sizes: "
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1041
              ^ commas (map (fn (_, n) => string_of_int n) universe) ^ ") ...")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1042
            (* translate 'u' and all axioms *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1043
            val (intrs, (model, args)) = fold_map (fn t' => fn (m, a) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1044
              let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1045
                val (i, m', a') = interpret ctxt m a t'
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1046
              in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1047
                (* set 'def_eq' to 'true' *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1048
                (i, (m', {maxvars = #maxvars a', def_eq = true,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1049
                  next_idx = #next_idx a', bounds = #bounds a',
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1050
                  wellformed = #wellformed a'}))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1051
              end) (u :: axioms) (init_model, init_args)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1052
            (* make 'u' either true or false, and make all axioms true, and *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1053
            (* add the well-formedness side condition                       *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1054
            val fm_u = (if negate then toFalse else toTrue) (hd intrs)
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1055
            val fm_ax = Prop_Logic.all (map toTrue (tl intrs))
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1056
            val fm = Prop_Logic.all [#wellformed args, fm_ax, fm_u]
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1057
            val _ =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1058
              (if satsolver = "dpll" orelse satsolver = "enumerate" then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1059
                warning ("Using SAT solver " ^ quote satsolver ^
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1060
                         "; for better performance, consider installing an \
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1061
                         \external solver.")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1062
               else ());
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1063
            val solver =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1064
              SatSolver.invoke_solver satsolver
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1065
              handle Option.Option =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1066
                     error ("Unknown SAT solver: " ^ quote satsolver ^
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1067
                            ". Available solvers: " ^
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1068
                            commas (map (quote o fst) (!SatSolver.solvers)) ^ ".")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1069
          in
40132
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1070
            Output.urgent_message "Invoking SAT solver...";
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1071
            (case solver fm of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1072
              SatSolver.SATISFIABLE assignment =>
42137
6803f2fd15c1 avoid *** in normal output, which usually marks errors in logs
krauss
parents: 41472
diff changeset
  1073
                (Output.urgent_message ("Model found:\n" ^ print_model ctxt model
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1074
                  (fn i => case assignment i of SOME b => b | NONE => true));
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1075
                 if maybe_spurious then "potential" else "genuine")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1076
            | SatSolver.UNSATISFIABLE _ =>
40132
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1077
                (Output.urgent_message "No model exists.";
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1078
                case next_universe universe sizes minsize maxsize of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1079
                  SOME universe' => find_model_loop universe'
40132
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1080
                | NONE => (Output.urgent_message
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1081
                    "Search terminated, no larger universe within the given limits.";
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1082
                    "none"))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1083
            | SatSolver.UNKNOWN =>
40132
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1084
                (Output.urgent_message "No model found.";
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1085
                case next_universe universe sizes minsize maxsize of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1086
                  SOME universe' => find_model_loop universe'
40132
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1087
                | NONE => (Output.urgent_message
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1088
                  "Search terminated, no larger universe within the given limits.";
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1089
                  "unknown"))) handle SatSolver.NOT_CONFIGURED =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1090
              (error ("SAT solver " ^ quote satsolver ^ " is not configured.");
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1091
               "unknown")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1092
          end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1093
          handle MAXVARS_EXCEEDED =>
40132
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1094
            (Output.urgent_message ("Search terminated, number of Boolean variables ("
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1095
              ^ string_of_int maxvars ^ " allowed) exceeded.");
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1096
              "unknown")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1097
30314
853778f6ef7d Added "expect" option to Refute, like in Nitpick, that allows to write regression tests.
blanchet
parents: 30312
diff changeset
  1098
        val outcome_code = find_model_loop (first_universe types sizes minsize)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1099
      in
33054
dd1192a96968 fixed the "expect" mechanism of Refute in the face of timeouts
blanchet
parents: 32952
diff changeset
  1100
        check_expect outcome_code
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1101
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1102
  in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1103
    (* some parameter sanity checks *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1104
    minsize>=1 orelse
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1105
      error ("\"minsize\" is " ^ string_of_int minsize ^ ", must be at least 1");
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1106
    maxsize>=1 orelse
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1107
      error ("\"maxsize\" is " ^ string_of_int maxsize ^ ", must be at least 1");
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1108
    maxsize>=minsize orelse
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1109
      error ("\"maxsize\" (=" ^ string_of_int maxsize ^
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1110
      ") is less than \"minsize\" (=" ^ string_of_int minsize ^ ").");
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1111
    maxvars>=0 orelse
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1112
      error ("\"maxvars\" is " ^ string_of_int maxvars ^ ", must be at least 0");
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1113
    maxtime>=0 orelse
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1114
      error ("\"maxtime\" is " ^ string_of_int maxtime ^ ", must be at least 0");
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1115
    (* enter loop with or without time limit *)
40132
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1116
    Output.urgent_message ("Trying to find a model that "
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1117
      ^ (if negate then "refutes" else "satisfies") ^ ": "
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1118
      ^ Syntax.string_of_term ctxt t);
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1119
    if maxtime > 0 then (
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1120
      TimeLimit.timeLimit (Time.fromSeconds maxtime)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1121
        wrapper ()
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1122
      handle TimeLimit.TimeOut =>
40132
7ee65dbffa31 renamed Output.priority to Output.urgent_message to emphasize its special role more clearly;
wenzelm
parents: 39811
diff changeset
  1123
        (Output.urgent_message ("Search terminated, time limit (" ^
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1124
            string_of_int maxtime
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1125
            ^ (if maxtime=1 then " second" else " seconds") ^ ") exceeded.");
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1126
         check_expect "unknown")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1127
    ) else wrapper ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1128
  end;
14456
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1129
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1130
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1131
(* ------------------------------------------------------------------------- *)
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1132
(* INTERFACE, PART 2: FINDING A MODEL                                        *)
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1133
(* ------------------------------------------------------------------------- *)
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1134
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1135
(* ------------------------------------------------------------------------- *)
14456
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1136
(* satisfy_term: calls 'find_model' to find a model that satisfies 't'       *)
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1137
(* params      : list of '(name, value)' pairs used to override default      *)
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1138
(*               parameters                                                  *)
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1139
(* ------------------------------------------------------------------------- *)
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1140
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1141
fun satisfy_term ctxt params assm_ts t =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1142
  find_model ctxt (actual_params ctxt params) assm_ts t false;
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1143
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1144
(* ------------------------------------------------------------------------- *)
14456
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1145
(* refute_term: calls 'find_model' to find a model that refutes 't'          *)
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1146
(* params     : list of '(name, value)' pairs used to override default       *)
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  1147
(*              parameters                                                   *)
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1148
(* ------------------------------------------------------------------------- *)
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1149
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1150
fun refute_term ctxt params assm_ts t =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1151
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1152
    (* disallow schematic type variables, since we cannot properly negate  *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1153
    (* terms containing them (their logical meaning is that there EXISTS a *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1154
    (* type s.t. ...; to refute such a formula, we would have to show that *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1155
    (* for ALL types, not ...)                                             *)
29272
fb3ccf499df5 use regular Term.add_XXX etc.;
wenzelm
parents: 29265
diff changeset
  1156
    val _ = null (Term.add_tvars t []) orelse
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1157
      error "Term to be refuted contains schematic type variables"
21556
e0ffb2d13f9f outermost universal quantifiers are stripped
webertj
parents: 21267
diff changeset
  1158
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1159
    (* existential closure over schematic variables *)
45741
088256c289e7 eliminated some legacy operations;
wenzelm
parents: 45740
diff changeset
  1160
    val vars = sort_wrt (fst o fst) (Term.add_vars t [])
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1161
    (* Term.term *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  1162
    val ex_closure = fold (fn ((x, i), T) => fn t' =>
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  1163
      HOLogic.exists_const T $
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  1164
        Abs (x, T, abstract_over (Var ((x, i), T), t'))) vars t
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1165
    (* Note: If 't' is of type 'propT' (rather than 'boolT'), applying   *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1166
    (* 'HOLogic.exists_const' is not type-correct.  However, this is not *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1167
    (* really a problem as long as 'find_model' still interprets the     *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1168
    (* resulting term correctly, without checking its type.              *)
21556
e0ffb2d13f9f outermost universal quantifiers are stripped
webertj
parents: 21267
diff changeset
  1169
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1170
    (* replace outermost universally quantified variables by Free's:     *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1171
    (* refuting a term with Free's is generally faster than refuting a   *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1172
    (* term with (nested) quantifiers, because quantifiers are expanded, *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1173
    (* while the SAT solver searches for an interpretation for Free's.   *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1174
    (* Also we get more information back that way, namely an             *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1175
    (* interpretation which includes values for the (formerly)           *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1176
    (* quantified variables.                                             *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1177
    (* maps  !!x1...xn. !xk...xm. t   to   t  *)
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
  1178
    fun strip_all_body (Const (@{const_name all}, _) $ Abs (_, _, t)) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1179
          strip_all_body t
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
  1180
      | strip_all_body (Const (@{const_name Trueprop}, _) $ t) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1181
          strip_all_body t
29820
07f53494cf20 Rearrange Refute/SAT theory dependencies so as to use even more antiquotations in refute.ML +
blanchet
parents: 29802
diff changeset
  1182
      | strip_all_body (Const (@{const_name All}, _) $ Abs (_, _, t)) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1183
          strip_all_body t
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
  1184
      | strip_all_body t = t
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1185
    (* maps  !!x1...xn. !xk...xm. t   to   [x1, ..., xn, xk, ..., xm]  *)
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
  1186
    fun strip_all_vars (Const (@{const_name all}, _) $ Abs (a, T, t)) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1187
          (a, T) :: strip_all_vars t
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
  1188
      | strip_all_vars (Const (@{const_name Trueprop}, _) $ t) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1189
          strip_all_vars t
29802
d201a838d0f7 Make some Refute functions public so I can use them in Nitpick,
blanchet
parents: 29288
diff changeset
  1190
      | strip_all_vars (Const (@{const_name All}, _) $ Abs (a, T, t)) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1191
          (a, T) :: strip_all_vars t
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1192
      | strip_all_vars _ = [] : (string * typ) list
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1193
    val strip_t = strip_all_body ex_closure
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1194
    val frees = Term.rename_wrt_term strip_t (strip_all_vars ex_closure)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1195
    val subst_t = Term.subst_bounds (map Free frees, strip_t)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1196
  in
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1197
    find_model ctxt (actual_params ctxt params) assm_ts subst_t true
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1198
  end;
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1199
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1200
(* ------------------------------------------------------------------------- *)
32857
394d37f19e0a Refute.refute_goal: canonical goal addresses from 1 (renamed from refute_subgoal to clarify change in semantics);
wenzelm
parents: 31986
diff changeset
  1201
(* refute_goal                                                               *)
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1202
(* ------------------------------------------------------------------------- *)
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1203
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1204
fun refute_goal ctxt params th i =
34120
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1205
  let
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1206
    val t = th |> prop_of
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1207
  in
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1208
    if Logic.count_prems t = 0 then
45387
ccffb3f9f42b return outcome code, so that it can be picked up by Mutabelle
blanchet
parents: 44121
diff changeset
  1209
      (Output.urgent_message "No subgoal!"; "none")
34120
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1210
    else
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1211
      let
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1212
        val assms = map term_of (Assumption.all_assms_of ctxt)
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1213
        val (t, frees) = Logic.goal_params t i
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1214
      in
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1215
        refute_term ctxt params assms (subst_bounds (frees, t))
34120
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1216
      end
f9920a3ddf50 added "no_assms" option to Refute, and include structured proof assumptions by default;
blanchet
parents: 34017
diff changeset
  1217
  end
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1218
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1219
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1220
(* ------------------------------------------------------------------------- *)
15292
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1221
(* INTERPRETERS: Auxiliary Functions                                         *)
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1222
(* ------------------------------------------------------------------------- *)
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1223
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1224
(* ------------------------------------------------------------------------- *)
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1225
(* make_constants: returns all interpretations for type 'T' that consist of  *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1226
(*                 unit vectors with 'True'/'False' only (no Boolean         *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1227
(*                 variables)                                                *)
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1228
(* ------------------------------------------------------------------------- *)
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  1229
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1230
fun make_constants ctxt model T =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1231
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1232
    (* returns a list with all unit vectors of length n *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1233
    fun unit_vectors n =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1234
      let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1235
        (* returns the k-th unit vector of length n *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1236
        fun unit_vector (k, n) =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1237
          Leaf ((replicate (k-1) False) @ (True :: (replicate (n-k) False)))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1238
        fun unit_vectors_loop k =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1239
          if k>n then [] else unit_vector (k,n) :: unit_vectors_loop (k+1)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1240
      in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1241
        unit_vectors_loop 1
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1242
      end
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1243
    (* returns a list of lists, each one consisting of n (possibly *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1244
    (* identical) elements from 'xs'                               *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1245
    fun pick_all 1 xs = map single xs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1246
      | pick_all n xs =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1247
          let val rec_pick = pick_all (n - 1) xs in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1248
            maps (fn x => map (cons x) rec_pick) xs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1249
          end
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1250
    (* returns all constant interpretations that have the same tree *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1251
    (* structure as the interpretation argument                     *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1252
    fun make_constants_intr (Leaf xs) = unit_vectors (length xs)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1253
      | make_constants_intr (Node xs) = map Node (pick_all (length xs)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1254
          (make_constants_intr (hd xs)))
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1255
    (* obtain the interpretation for a variable of type 'T' *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1256
    val (i, _, _) = interpret ctxt model {maxvars=0, def_eq=false, next_idx=1,
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1257
      bounds=[], wellformed=True} (Free ("dummy", T))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1258
  in
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1259
    make_constants_intr i
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1260
  end;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1261
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1262
(* ------------------------------------------------------------------------- *)
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1263
(* size_of_type: returns the number of elements in a type 'T' (i.e. 'length  *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1264
(*               (make_constants T)', but implemented more efficiently)      *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1265
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1266
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1267
(* returns 0 for an empty ground type or a function type with empty      *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1268
(* codomain, but fails for a function type with empty domain --          *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1269
(* admissibility of datatype constructor argument types (see "Inductive  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1270
(* datatypes in HOL - lessons learned ...", S. Berghofer, M. Wenzel,     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1271
(* TPHOLs 99) ensures that recursive, possibly empty, datatype fragments *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1272
(* never occur as the domain of a function type that is the type of a    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1273
(* constructor argument                                                  *)
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1274
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1275
fun size_of_type ctxt model T =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1276
  let
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1277
    (* returns the number of elements that have the same tree structure as a *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1278
    (* given interpretation                                                  *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1279
    fun size_of_intr (Leaf xs) = length xs
39047
cdff476ba39e use existing Integer.pow, despite its slightly odd argument order;
wenzelm
parents: 39046
diff changeset
  1280
      | size_of_intr (Node xs) = Integer.pow (length xs) (size_of_intr (hd xs))
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1281
    (* obtain the interpretation for a variable of type 'T' *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1282
    val (i, _, _) = interpret ctxt model {maxvars=0, def_eq=false, next_idx=1,
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1283
      bounds=[], wellformed=True} (Free ("dummy", T))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1284
  in
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1285
    size_of_intr i
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1286
  end;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1287
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1288
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1289
(* TT/FF: interpretations that denote "true" or "false", respectively        *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1290
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1291
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1292
val TT = Leaf [True, False];
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1293
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1294
val FF = Leaf [False, True];
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1295
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1296
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1297
(* make_equality: returns an interpretation that denotes (extensional)       *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1298
(*                equality of two interpretations                            *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1299
(* - two interpretations are 'equal' iff they are both defined and denote    *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1300
(*   the same value                                                          *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1301
(* - two interpretations are 'not_equal' iff they are both defined at least  *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1302
(*   partially, and a defined part denotes different values                  *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1303
(* - a completely undefined interpretation is neither 'equal' nor            *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1304
(*   'not_equal' to another interpretation                                   *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1305
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1306
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1307
(* We could in principle represent '=' on a type T by a particular        *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1308
(* interpretation.  However, the size of that interpretation is quadratic *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1309
(* in the size of T.  Therefore comparing the interpretations 'i1' and    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1310
(* 'i2' directly is more efficient than constructing the interpretation   *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1311
(* for equality on T first, and "applying" this interpretation to 'i1'    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1312
(* and 'i2' in the usual way (cf. 'interpretation_apply') then.           *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1313
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1314
fun make_equality (i1, i2) =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1315
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1316
    fun equal (i1, i2) =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1317
      (case i1 of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1318
        Leaf xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1319
          (case i2 of
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1320
            Leaf ys => Prop_Logic.dot_product (xs, ys)  (* defined and equal *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1321
          | Node _  => raise REFUTE ("make_equality",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1322
            "second interpretation is higher"))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1323
      | Node xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1324
          (case i2 of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1325
            Leaf _  => raise REFUTE ("make_equality",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1326
            "first interpretation is higher")
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1327
          | Node ys => Prop_Logic.all (map equal (xs ~~ ys))))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1328
    fun not_equal (i1, i2) =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1329
      (case i1 of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1330
        Leaf xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1331
          (case i2 of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1332
            (* defined and not equal *)
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1333
            Leaf ys => Prop_Logic.all ((Prop_Logic.exists xs)
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1334
            :: (Prop_Logic.exists ys)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1335
            :: (map (fn (x,y) => SOr (SNot x, SNot y)) (xs ~~ ys)))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1336
          | Node _  => raise REFUTE ("make_equality",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1337
            "second interpretation is higher"))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1338
      | Node xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1339
          (case i2 of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1340
            Leaf _  => raise REFUTE ("make_equality",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1341
            "first interpretation is higher")
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1342
          | Node ys => Prop_Logic.exists (map not_equal (xs ~~ ys))))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1343
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1344
    (* a value may be undefined; therefore 'not_equal' is not just the *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1345
    (* negation of 'equal'                                             *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1346
    Leaf [equal (i1, i2), not_equal (i1, i2)]
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1347
  end;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1348
15292
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1349
(* ------------------------------------------------------------------------- *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1350
(* make_def_equality: returns an interpretation that denotes (extensional)   *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1351
(*                    equality of two interpretations                        *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1352
(* This function treats undefined/partially defined interpretations          *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1353
(* different from 'make_equality': two undefined interpretations are         *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1354
(* considered equal, while a defined interpretation is considered not equal  *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1355
(* to an undefined interpretation.                                           *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1356
(* ------------------------------------------------------------------------- *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1357
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1358
fun make_def_equality (i1, i2) =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1359
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1360
    fun equal (i1, i2) =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1361
      (case i1 of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1362
        Leaf xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1363
          (case i2 of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1364
            (* defined and equal, or both undefined *)
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1365
            Leaf ys => SOr (Prop_Logic.dot_product (xs, ys),
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1366
            SAnd (Prop_Logic.all (map SNot xs), Prop_Logic.all (map SNot ys)))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1367
          | Node _  => raise REFUTE ("make_def_equality",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1368
            "second interpretation is higher"))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1369
      | Node xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1370
          (case i2 of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1371
            Leaf _  => raise REFUTE ("make_def_equality",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1372
            "first interpretation is higher")
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1373
          | Node ys => Prop_Logic.all (map equal (xs ~~ ys))))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1374
    val eq = equal (i1, i2)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1375
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1376
    Leaf [eq, SNot eq]
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1377
  end;
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1378
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1379
(* ------------------------------------------------------------------------- *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1380
(* interpretation_apply: returns an interpretation that denotes the result   *)
22092
ab3dfcef6489 reformatted to 80 chars/line
webertj
parents: 22055
diff changeset
  1381
(*                       of applying the function denoted by 'i1' to the     *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1382
(*                       argument denoted by 'i2'                            *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1383
(* ------------------------------------------------------------------------- *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1384
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1385
fun interpretation_apply (i1, i2) =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1386
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1387
    fun interpretation_disjunction (tr1,tr2) =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1388
      tree_map (fn (xs,ys) => map (fn (x,y) => SOr(x,y)) (xs ~~ ys))
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1389
        (tree_pair (tr1,tr2))
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1390
    fun prop_formula_times_interpretation (fm,tr) =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1391
      tree_map (map (fn x => SAnd (fm,x))) tr
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1392
    fun prop_formula_list_dot_product_interpretation_list ([fm],[tr]) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1393
          prop_formula_times_interpretation (fm,tr)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1394
      | prop_formula_list_dot_product_interpretation_list (fm::fms,tr::trees) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1395
          interpretation_disjunction (prop_formula_times_interpretation (fm,tr),
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1396
            prop_formula_list_dot_product_interpretation_list (fms,trees))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1397
      | prop_formula_list_dot_product_interpretation_list (_,_) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1398
          raise REFUTE ("interpretation_apply", "empty list (in dot product)")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1399
    (* returns a list of lists, each one consisting of one element from each *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1400
    (* element of 'xss'                                                      *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1401
    fun pick_all [xs] = map single xs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1402
      | pick_all (xs::xss) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1403
          let val rec_pick = pick_all xss in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1404
            maps (fn x => map (cons x) rec_pick) xs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1405
          end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1406
      | pick_all _ = raise REFUTE ("interpretation_apply", "empty list (in pick_all)")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1407
    fun interpretation_to_prop_formula_list (Leaf xs) = xs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1408
      | interpretation_to_prop_formula_list (Node trees) =
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1409
          map Prop_Logic.all (pick_all
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1410
            (map interpretation_to_prop_formula_list trees))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1411
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1412
    case i1 of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1413
      Leaf _ =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1414
        raise REFUTE ("interpretation_apply", "first interpretation is a leaf")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1415
    | Node xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1416
        prop_formula_list_dot_product_interpretation_list
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1417
          (interpretation_to_prop_formula_list i2, xs)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1418
  end;
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1419
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1420
(* ------------------------------------------------------------------------- *)
15292
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1421
(* eta_expand: eta-expands a term 't' by adding 'i' lambda abstractions      *)
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1422
(* ------------------------------------------------------------------------- *)
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1423
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1424
fun eta_expand t i =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1425
  let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1426
    val Ts = Term.binder_types (Term.fastype_of t)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1427
    val t' = Term.incr_boundvars i t
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1428
  in
33339
d41f77196338 eliminated some old folds;
wenzelm
parents: 33317
diff changeset
  1429
    fold_rev (fn T => fn term => Abs ("<eta_expand>", T, term))
d41f77196338 eliminated some old folds;
wenzelm
parents: 33317
diff changeset
  1430
      (List.take (Ts, i))
d41f77196338 eliminated some old folds;
wenzelm
parents: 33317
diff changeset
  1431
      (Term.list_comb (t', map Bound (i-1 downto 0)))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1432
  end;
15292
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1433
15335
f81e6e24351f minor code refactoring (typ_of_dtyp, size_of_dtyp)
webertj
parents: 15334
diff changeset
  1434
(* ------------------------------------------------------------------------- *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1435
(* size_of_dtyp: the size of (an initial fragment of) an inductive data type *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1436
(*               is the sum (over its constructors) of the product (over     *)
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1437
(*               their arguments) of the size of the argument types          *)
15335
f81e6e24351f minor code refactoring (typ_of_dtyp, size_of_dtyp)
webertj
parents: 15334
diff changeset
  1438
(* ------------------------------------------------------------------------- *)
f81e6e24351f minor code refactoring (typ_of_dtyp, size_of_dtyp)
webertj
parents: 15334
diff changeset
  1439
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1440
fun size_of_dtyp ctxt typ_sizes descr typ_assoc constructors =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1441
  Integer.sum (map (fn (_, dtyps) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1442
    Integer.prod (map (size_of_type ctxt (typ_sizes, []) o
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1443
      (typ_of_dtyp descr typ_assoc)) dtyps))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1444
        constructors);
15335
f81e6e24351f minor code refactoring (typ_of_dtyp, size_of_dtyp)
webertj
parents: 15334
diff changeset
  1445
15292
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1446
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1447
(* ------------------------------------------------------------------------- *)
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1448
(* INTERPRETERS: Actual Interpreters                                         *)
09e218879265 minor changes (comments/code refactoring)
webertj
parents: 15283
diff changeset
  1449
(* ------------------------------------------------------------------------- *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1450
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1451
(* simply typed lambda calculus: Isabelle's basic term syntax, with type *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1452
(* variables, function types, and propT                                  *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1453
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1454
fun stlc_interpreter ctxt model args t =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1455
  let
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1456
    val (typs, terms) = model
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1457
    val {maxvars, def_eq, next_idx, bounds, wellformed} = args
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1458
    fun interpret_groundterm T =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1459
      let
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1460
        fun interpret_groundtype () =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1461
          let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1462
            (* the model must specify a size for ground types *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1463
            val size =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1464
              if T = Term.propT then 2
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1465
              else the (AList.lookup (op =) typs T)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1466
            val next = next_idx + size
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1467
            (* check if 'maxvars' is large enough *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1468
            val _ = (if next - 1 > maxvars andalso maxvars > 0 then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1469
              raise MAXVARS_EXCEEDED else ())
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1470
            val fms  = map BoolVar (next_idx upto (next_idx + size - 1))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1471
            val intr = Leaf fms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1472
            fun one_of_two_false [] = True
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1473
              | one_of_two_false (x::xs) = SAnd (Prop_Logic.all (map (fn x' =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1474
                  SOr (SNot x, SNot x')) xs), one_of_two_false xs)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1475
            val wf = one_of_two_false fms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1476
          in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1477
            (* extend the model, increase 'next_idx', add well-formedness *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1478
            (* condition                                                  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1479
            SOME (intr, (typs, (t, intr)::terms), {maxvars = maxvars,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1480
              def_eq = def_eq, next_idx = next, bounds = bounds,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1481
              wellformed = SAnd (wellformed, wf)})
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1482
          end
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1483
      in
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1484
        case T of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1485
          Type ("fun", [T1, T2]) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1486
            let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1487
              (* we create 'size_of_type ... T1' different copies of the        *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1488
              (* interpretation for 'T2', which are then combined into a single *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1489
              (* new interpretation                                             *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1490
              (* make fresh copies, with different variable indices *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1491
              (* 'idx': next variable index                         *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1492
              (* 'n'  : number of copies                            *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1493
              fun make_copies idx 0 = (idx, [], True)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1494
                | make_copies idx n =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1495
                    let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1496
                      val (copy, _, new_args) = interpret ctxt (typs, [])
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1497
                        {maxvars = maxvars, def_eq = false, next_idx = idx,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1498
                        bounds = [], wellformed = True} (Free ("dummy", T2))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1499
                      val (idx', copies, wf') = make_copies (#next_idx new_args) (n-1)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1500
                    in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1501
                      (idx', copy :: copies, SAnd (#wellformed new_args, wf'))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1502
                    end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1503
              val (next, copies, wf) = make_copies next_idx
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1504
                (size_of_type ctxt model T1)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1505
              (* combine copies into a single interpretation *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1506
              val intr = Node copies
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1507
            in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1508
              (* extend the model, increase 'next_idx', add well-formedness *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1509
              (* condition                                                  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1510
              SOME (intr, (typs, (t, intr)::terms), {maxvars = maxvars,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1511
                def_eq = def_eq, next_idx = next, bounds = bounds,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1512
                wellformed = SAnd (wellformed, wf)})
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1513
            end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1514
        | Type _  => interpret_groundtype ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1515
        | TFree _ => interpret_groundtype ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1516
        | TVar  _ => interpret_groundtype ()
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1517
      end
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1518
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1519
    case AList.lookup (op =) terms t of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1520
      SOME intr =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1521
        (* return an existing interpretation *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1522
        SOME (intr, model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1523
    | NONE =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1524
        (case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1525
          Const (_, T) => interpret_groundterm T
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1526
        | Free (_, T) => interpret_groundterm T
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1527
        | Var (_, T) => interpret_groundterm T
42364
8c674b3b8e44 eliminated old List.nth;
wenzelm
parents: 42361
diff changeset
  1528
        | Bound i => SOME (nth (#bounds args) i, model, args)
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1529
        | Abs (_, T, body) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1530
            let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1531
              (* create all constants of type 'T' *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1532
              val constants = make_constants ctxt model T
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1533
              (* interpret the 'body' separately for each constant *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1534
              val (bodies, (model', args')) = fold_map
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1535
                (fn c => fn (m, a) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1536
                  let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1537
                    (* add 'c' to 'bounds' *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1538
                    val (i', m', a') = interpret ctxt m {maxvars = #maxvars a,
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1539
                      def_eq = #def_eq a, next_idx = #next_idx a,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1540
                      bounds = (c :: #bounds a), wellformed = #wellformed a} body
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1541
                  in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1542
                    (* keep the new model m' and 'next_idx' and 'wellformed', *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1543
                    (* but use old 'bounds'                                   *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1544
                    (i', (m', {maxvars = maxvars, def_eq = def_eq,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1545
                      next_idx = #next_idx a', bounds = bounds,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1546
                      wellformed = #wellformed a'}))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1547
                  end)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1548
                constants (model, args)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1549
            in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1550
              SOME (Node bodies, model', args')
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1551
            end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1552
        | t1 $ t2 =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1553
            let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1554
              (* interpret 't1' and 't2' separately *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1555
              val (intr1, model1, args1) = interpret ctxt model args t1
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1556
              val (intr2, model2, args2) = interpret ctxt model1 args1 t2
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1557
            in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1558
              SOME (interpretation_apply (intr1, intr2), model2, args2)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1559
            end)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1560
  end;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1561
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1562
fun Pure_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1563
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1564
    Const (@{const_name all}, _) $ t1 =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1565
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1566
        val (i, m, a) = interpret ctxt model args t1
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1567
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1568
        case i of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1569
          Node xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1570
            (* 3-valued logic *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1571
            let
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1572
              val fmTrue  = Prop_Logic.all (map toTrue xs)
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1573
              val fmFalse = Prop_Logic.exists (map toFalse xs)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1574
            in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1575
              SOME (Leaf [fmTrue, fmFalse], m, a)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1576
            end
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1577
        | _ =>
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1578
          raise REFUTE ("Pure_interpreter",
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1579
            "\"all\" is followed by a non-function")
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1580
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1581
  | Const (@{const_name all}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1582
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1583
  | Const (@{const_name "=="}, _) $ t1 $ t2 =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1584
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1585
        val (i1, m1, a1) = interpret ctxt model args t1
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1586
        val (i2, m2, a2) = interpret ctxt m1 a1 t2
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1587
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1588
        (* we use either 'make_def_equality' or 'make_equality' *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1589
        SOME ((if #def_eq args then make_def_equality else make_equality)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1590
          (i1, i2), m2, a2)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1591
      end
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1592
  | Const (@{const_name "=="}, _) $ _ =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1593
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1594
  | Const (@{const_name "=="}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1595
      SOME (interpret ctxt model args (eta_expand t 2))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1596
  | Const (@{const_name "==>"}, _) $ t1 $ t2 =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1597
      (* 3-valued logic *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1598
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1599
        val (i1, m1, a1) = interpret ctxt model args t1
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1600
        val (i2, m2, a2) = interpret ctxt m1 a1 t2
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1601
        val fmTrue = Prop_Logic.SOr (toFalse i1, toTrue i2)
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1602
        val fmFalse = Prop_Logic.SAnd (toTrue i1, toFalse i2)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1603
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1604
        SOME (Leaf [fmTrue, fmFalse], m2, a2)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1605
      end
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1606
  | Const (@{const_name "==>"}, _) $ _ =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1607
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1608
  | Const (@{const_name "==>"}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1609
      SOME (interpret ctxt model args (eta_expand t 2))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1610
  | _ => NONE;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1611
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1612
fun HOLogic_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1613
(* Providing interpretations directly is more efficient than unfolding the *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1614
(* logical constants.  In HOL however, logical constants can themselves be *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1615
(* arguments.  They are then translated using eta-expansion.               *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1616
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1617
    Const (@{const_name Trueprop}, _) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1618
      SOME (Node [TT, FF], model, args)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1619
  | Const (@{const_name Not}, _) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1620
      SOME (Node [FF, TT], model, args)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1621
  (* redundant, since 'True' is also an IDT constructor *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1622
  | Const (@{const_name True}, _) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1623
      SOME (TT, model, args)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1624
  (* redundant, since 'False' is also an IDT constructor *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1625
  | Const (@{const_name False}, _) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1626
      SOME (FF, model, args)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1627
  | Const (@{const_name All}, _) $ t1 =>  (* similar to "all" (Pure) *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1628
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1629
        val (i, m, a) = interpret ctxt model args t1
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1630
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1631
        case i of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1632
          Node xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1633
            (* 3-valued logic *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1634
            let
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1635
              val fmTrue = Prop_Logic.all (map toTrue xs)
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1636
              val fmFalse = Prop_Logic.exists (map toFalse xs)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1637
            in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1638
              SOME (Leaf [fmTrue, fmFalse], m, a)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1639
            end
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1640
        | _ =>
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1641
          raise REFUTE ("HOLogic_interpreter",
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1642
            "\"All\" is followed by a non-function")
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1643
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1644
  | Const (@{const_name All}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1645
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1646
  | Const (@{const_name Ex}, _) $ t1 =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1647
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1648
        val (i, m, a) = interpret ctxt model args t1
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1649
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1650
        case i of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1651
          Node xs =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1652
            (* 3-valued logic *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1653
            let
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1654
              val fmTrue = Prop_Logic.exists (map toTrue xs)
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1655
              val fmFalse = Prop_Logic.all (map toFalse xs)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1656
            in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1657
              SOME (Leaf [fmTrue, fmFalse], m, a)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1658
            end
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1659
        | _ =>
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1660
          raise REFUTE ("HOLogic_interpreter",
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1661
            "\"Ex\" is followed by a non-function")
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1662
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1663
  | Const (@{const_name Ex}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1664
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1665
  | Const (@{const_name HOL.eq}, _) $ t1 $ t2 =>  (* similar to "==" (Pure) *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1666
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1667
        val (i1, m1, a1) = interpret ctxt model args t1
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1668
        val (i2, m2, a2) = interpret ctxt m1 a1 t2
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1669
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1670
        SOME (make_equality (i1, i2), m2, a2)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1671
      end
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1672
  | Const (@{const_name HOL.eq}, _) $ _ =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1673
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1674
  | Const (@{const_name HOL.eq}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1675
      SOME (interpret ctxt model args (eta_expand t 2))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1676
  | Const (@{const_name HOL.conj}, _) $ t1 $ t2 =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1677
      (* 3-valued logic *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1678
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1679
        val (i1, m1, a1) = interpret ctxt model args t1
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1680
        val (i2, m2, a2) = interpret ctxt m1 a1 t2
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1681
        val fmTrue = Prop_Logic.SAnd (toTrue i1, toTrue i2)
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1682
        val fmFalse = Prop_Logic.SOr (toFalse i1, toFalse i2)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1683
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1684
        SOME (Leaf [fmTrue, fmFalse], m2, a2)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1685
      end
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1686
  | Const (@{const_name HOL.conj}, _) $ _ =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1687
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1688
  | Const (@{const_name HOL.conj}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1689
      SOME (interpret ctxt model args (eta_expand t 2))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1690
      (* this would make "undef" propagate, even for formulae like *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1691
      (* "False & undef":                                          *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1692
      (* SOME (Node [Node [TT, FF], Node [FF, FF]], model, args) *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1693
  | Const (@{const_name HOL.disj}, _) $ t1 $ t2 =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1694
      (* 3-valued logic *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1695
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1696
        val (i1, m1, a1) = interpret ctxt model args t1
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1697
        val (i2, m2, a2) = interpret ctxt m1 a1 t2
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1698
        val fmTrue = Prop_Logic.SOr (toTrue i1, toTrue i2)
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1699
        val fmFalse = Prop_Logic.SAnd (toFalse i1, toFalse i2)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1700
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1701
        SOME (Leaf [fmTrue, fmFalse], m2, a2)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1702
      end
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1703
  | Const (@{const_name HOL.disj}, _) $ _ =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1704
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1705
  | Const (@{const_name HOL.disj}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1706
      SOME (interpret ctxt model args (eta_expand t 2))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1707
      (* this would make "undef" propagate, even for formulae like *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1708
      (* "True | undef":                                           *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1709
      (* SOME (Node [Node [TT, TT], Node [TT, FF]], model, args) *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1710
  | Const (@{const_name HOL.implies}, _) $ t1 $ t2 =>  (* similar to "==>" (Pure) *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1711
      (* 3-valued logic *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1712
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1713
        val (i1, m1, a1) = interpret ctxt model args t1
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1714
        val (i2, m2, a2) = interpret ctxt m1 a1 t2
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1715
        val fmTrue = Prop_Logic.SOr (toFalse i1, toTrue i2)
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1716
        val fmFalse = Prop_Logic.SAnd (toTrue i1, toFalse i2)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1717
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1718
        SOME (Leaf [fmTrue, fmFalse], m2, a2)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1719
      end
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1720
  | Const (@{const_name HOL.implies}, _) $ _ =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1721
      SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1722
  | Const (@{const_name HOL.implies}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1723
      SOME (interpret ctxt model args (eta_expand t 2))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1724
      (* this would make "undef" propagate, even for formulae like *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1725
      (* "False --> undef":                                        *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1726
      (* SOME (Node [Node [TT, FF], Node [TT, TT]], model, args) *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1727
  | _ => NONE;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  1728
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1729
(* interprets variables and constants whose type is an IDT (this is        *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1730
(* relatively easy and merely requires us to compute the size of the IDT); *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1731
(* constructors of IDTs however are properly interpreted by                *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1732
(* 'IDT_constructor_interpreter'                                           *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1733
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1734
fun IDT_interpreter ctxt model args t =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1735
  let
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 42137
diff changeset
  1736
    val thy = Proof_Context.theory_of ctxt
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1737
    val (typs, terms) = model
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1738
    fun interpret_term (Type (s, Ts)) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1739
          (case Datatype.get_info thy s of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1740
            SOME info =>  (* inductive datatype *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1741
              let
55507
5f27fb2110e0 removed odd comments -- inferred types are shown by Prover IDE;
wenzelm
parents: 55411
diff changeset
  1742
                (* only recursive IDTs have an associated depth *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1743
                val depth = AList.lookup (op =) typs (Type (s, Ts))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1744
                (* sanity check: depth must be at least 0 *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1745
                val _ =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1746
                  (case depth of SOME n =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1747
                    if n < 0 then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1748
                      raise REFUTE ("IDT_interpreter", "negative depth")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1749
                    else ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1750
                  | _ => ())
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1751
              in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1752
                (* termination condition to avoid infinite recursion *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1753
                if depth = (SOME 0) then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1754
                  (* return a leaf of size 0 *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1755
                  SOME (Leaf [], model, args)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1756
                else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1757
                  let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1758
                    val index               = #index info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1759
                    val descr               = #descr info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1760
                    val (_, dtyps, constrs) = the (AList.lookup (op =) descr index)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1761
                    val typ_assoc           = dtyps ~~ Ts
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1762
                    (* sanity check: every element in 'dtyps' must be a 'DtTFree' *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1763
                    val _ =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1764
                      if Library.exists (fn d =>
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  1765
                        case d of Datatype.DtTFree _ => false | _ => true) dtyps
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1766
                      then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1767
                        raise REFUTE ("IDT_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1768
                          "datatype argument (for type "
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1769
                          ^ Syntax.string_of_typ ctxt (Type (s, Ts))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1770
                          ^ ") is not a variable")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1771
                      else ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1772
                    (* if the model specifies a depth for the current type, *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1773
                    (* decrement it to avoid infinite recursion             *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1774
                    val typs' = case depth of NONE => typs | SOME n =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1775
                      AList.update (op =) (Type (s, Ts), n-1) typs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1776
                    (* recursively compute the size of the datatype *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1777
                    val size     = size_of_dtyp ctxt typs' descr typ_assoc constrs
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1778
                    val next_idx = #next_idx args
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1779
                    val next     = next_idx+size
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1780
                    (* check if 'maxvars' is large enough *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1781
                    val _        = (if next-1 > #maxvars args andalso
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1782
                      #maxvars args > 0 then raise MAXVARS_EXCEEDED else ())
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1783
                    val fms      = map BoolVar (next_idx upto (next_idx+size-1))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1784
                    val intr     = Leaf fms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1785
                    fun one_of_two_false [] = True
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  1786
                      | one_of_two_false (x::xs) = SAnd (Prop_Logic.all (map (fn x' =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1787
                          SOr (SNot x, SNot x')) xs), one_of_two_false xs)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1788
                    val wf = one_of_two_false fms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1789
                  in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1790
                    (* extend the model, increase 'next_idx', add well-formedness *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1791
                    (* condition                                                  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1792
                    SOME (intr, (typs, (t, intr)::terms), {maxvars = #maxvars args,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1793
                      def_eq = #def_eq args, next_idx = next, bounds = #bounds args,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1794
                      wellformed = SAnd (#wellformed args, wf)})
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1795
                  end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1796
              end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1797
          | NONE =>  (* not an inductive datatype *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1798
              NONE)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1799
      | interpret_term _ =  (* a (free or schematic) type variable *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1800
          NONE
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1801
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1802
    case AList.lookup (op =) terms t of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1803
      SOME intr =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1804
        (* return an existing interpretation *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1805
        SOME (intr, model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1806
    | NONE =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1807
        (case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1808
          Free (_, T) => interpret_term T
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1809
        | Var (_, T) => interpret_term T
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1810
        | Const (_, T) => interpret_term T
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1811
        | _ => NONE)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1812
  end;
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  1813
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1814
(* This function imposes an order on the elements of a datatype fragment  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1815
(* as follows: C_i x_1 ... x_n < C_j y_1 ... y_m iff i < j or             *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1816
(* (x_1, ..., x_n) < (y_1, ..., y_m).  With this order, a constructor is  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1817
(* a function C_i that maps some argument indices x_1, ..., x_n to the    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1818
(* datatype element given by index C_i x_1 ... x_n.  The idea remains the *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1819
(* same for recursive datatypes, although the computation of indices gets *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1820
(* a little tricky.                                                       *)
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1821
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1822
fun IDT_constructor_interpreter ctxt model args t =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1823
  let
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 42137
diff changeset
  1824
    val thy = Proof_Context.theory_of ctxt
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1825
    (* returns a list of canonical representations for terms of the type 'T' *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1826
    (* It would be nice if we could just use 'print' for this, but 'print'   *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1827
    (* for IDTs calls 'IDT_constructor_interpreter' again, and this could    *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1828
    (* lead to infinite recursion when we have (mutually) recursive IDTs.    *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1829
    fun canonical_terms typs T =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1830
          (case T of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1831
            Type ("fun", [T1, T2]) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1832
            (* 'T2' might contain a recursive IDT, so we cannot use 'print' (at *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1833
            (* least not for 'T2'                                               *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1834
            let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1835
              (* returns a list of lists, each one consisting of n (possibly *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1836
              (* identical) elements from 'xs'                               *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1837
              fun pick_all 1 xs = map single xs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1838
                | pick_all n xs =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1839
                    let val rec_pick = pick_all (n-1) xs in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1840
                      maps (fn x => map (cons x) rec_pick) xs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1841
                    end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1842
              (* ["x1", ..., "xn"] *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1843
              val terms1 = canonical_terms typs T1
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1844
              (* ["y1", ..., "ym"] *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1845
              val terms2 = canonical_terms typs T2
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1846
              (* [[("x1", "y1"), ..., ("xn", "y1")], ..., *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1847
              (*   [("x1", "ym"), ..., ("xn", "ym")]]     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1848
              val functions = map (curry (op ~~) terms1)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1849
                (pick_all (length terms1) terms2)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1850
              (* [["(x1, y1)", ..., "(xn, y1)"], ..., *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1851
              (*   ["(x1, ym)", ..., "(xn, ym)"]]     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1852
              val pairss = map (map HOLogic.mk_prod) functions
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1853
              val HOLogic_prodT = HOLogic.mk_prodT (T1, T2)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1854
              val HOLogic_setT  = HOLogic.mk_setT HOLogic_prodT
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1855
              val HOLogic_empty_set = Const (@{const_abbrev Set.empty}, HOLogic_setT)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1856
              val HOLogic_insert    =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1857
                Const (@{const_name insert}, HOLogic_prodT --> HOLogic_setT --> HOLogic_setT)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1858
            in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1859
              (* functions as graphs, i.e. as a (HOL) set of pairs "(x, y)" *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1860
              map (fn ps => fold_rev (fn pair => fn acc => HOLogic_insert $ pair $ acc) ps
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1861
                HOLogic_empty_set) pairss
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1862
            end
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1863
      | Type (s, Ts) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1864
          (case Datatype.get_info thy s of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1865
            SOME info =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1866
              (case AList.lookup (op =) typs T of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1867
                SOME 0 =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1868
                  (* termination condition to avoid infinite recursion *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1869
                  []  (* at depth 0, every IDT is empty *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1870
              | _ =>
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1871
                let
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1872
                  val index = #index info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1873
                  val descr = #descr info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1874
                  val (_, dtyps, constrs) = the (AList.lookup (op =) descr index)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1875
                  val typ_assoc = dtyps ~~ Ts
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1876
                  (* sanity check: every element in 'dtyps' must be a 'DtTFree' *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1877
                  val _ =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1878
                    if Library.exists (fn d =>
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  1879
                      case d of Datatype.DtTFree _ => false | _ => true) dtyps
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1880
                    then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1881
                      raise REFUTE ("IDT_constructor_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1882
                        "datatype argument (for type "
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1883
                        ^ Syntax.string_of_typ ctxt T
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1884
                        ^ ") is not a variable")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1885
                    else ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1886
                  (* decrement depth for the IDT 'T' *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1887
                  val typs' =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1888
                    (case AList.lookup (op =) typs T of NONE => typs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1889
                    | SOME n => AList.update (op =) (T, n-1) typs)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1890
                  fun constructor_terms terms [] = terms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1891
                    | constructor_terms terms (d::ds) =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1892
                        let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1893
                          val dT = typ_of_dtyp descr typ_assoc d
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1894
                          val d_terms = canonical_terms typs' dT
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1895
                        in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1896
                          (* C_i x_1 ... x_n < C_i y_1 ... y_n if *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1897
                          (* (x_1, ..., x_n) < (y_1, ..., y_n)    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1898
                          constructor_terms
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1899
                            (map_product (curry op $) terms d_terms) ds
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1900
                        end
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1901
                in
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1902
                  (* C_i ... < C_j ... if i < j *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1903
                  maps (fn (cname, ctyps) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1904
                    let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1905
                      val cTerm = Const (cname,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1906
                        map (typ_of_dtyp descr typ_assoc) ctyps ---> T)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1907
                    in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1908
                      constructor_terms [cTerm] ctyps
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1909
                    end) constrs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1910
                end)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1911
          | NONE =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1912
              (* not an inductive datatype; in this case the argument types in *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1913
              (* 'Ts' may not be IDTs either, so 'print' should be safe        *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1914
              map (fn intr => print ctxt (typs, []) T intr (K false))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1915
                (make_constants ctxt (typs, []) T))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1916
      | _ =>  (* TFree ..., TVar ... *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1917
          map (fn intr => print ctxt (typs, []) T intr (K false))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1918
            (make_constants ctxt (typs, []) T))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1919
    val (typs, terms) = model
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1920
  in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1921
    case AList.lookup (op =) terms t of
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1922
      SOME intr =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1923
        (* return an existing interpretation *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1924
        SOME (intr, model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1925
    | NONE =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1926
        (case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1927
          Const (s, T) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1928
            (case body_type T of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1929
              Type (s', Ts') =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1930
                (case Datatype.get_info thy s' of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1931
                  SOME info =>  (* body type is an inductive datatype *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1932
                    let
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1933
                      val index               = #index info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1934
                      val descr               = #descr info
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1935
                      val (_, dtyps, constrs) = the (AList.lookup (op =) descr index)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1936
                      val typ_assoc           = dtyps ~~ Ts'
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1937
                      (* sanity check: every element in 'dtyps' must be a 'DtTFree' *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1938
                      val _ = if Library.exists (fn d =>
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  1939
                          case d of Datatype.DtTFree _ => false | _ => true) dtyps
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1940
                        then
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  1941
                          raise REFUTE ("IDT_constructor_interpreter",
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1942
                            "datatype argument (for type "
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1943
                            ^ Syntax.string_of_typ ctxt (Type (s', Ts'))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1944
                            ^ ") is not a variable")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  1945
                        else ()
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1946
                      (* split the constructors into those occuring before/after *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1947
                      (* 'Const (s, T)'                                          *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1948
                      val (constrs1, constrs2) = take_prefix (fn (cname, ctypes) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1949
                        not (cname = s andalso Sign.typ_instance thy (T,
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1950
                          map (typ_of_dtyp descr typ_assoc) ctypes
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1951
                            ---> Type (s', Ts')))) constrs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1952
                    in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1953
                      case constrs2 of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1954
                        [] =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1955
                          (* 'Const (s, T)' is not a constructor of this datatype *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1956
                          NONE
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  1957
                      | (_, ctypes)::_ =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1958
                          let
55507
5f27fb2110e0 removed odd comments -- inferred types are shown by Prover IDE;
wenzelm
parents: 55411
diff changeset
  1959
                            (* only /recursive/ IDTs have an associated depth *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1960
                            val depth = AList.lookup (op =) typs (Type (s', Ts'))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1961
                            (* this should never happen: at depth 0, this IDT fragment *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1962
                            (* is definitely empty, and in this case we don't need to  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1963
                            (* interpret its constructors                              *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1964
                            val _ = (case depth of SOME 0 =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1965
                                raise REFUTE ("IDT_constructor_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1966
                                  "depth is 0")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1967
                              | _ => ())
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1968
                            val typs' = (case depth of NONE => typs | SOME n =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1969
                              AList.update (op =) (Type (s', Ts'), n-1) typs)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1970
                            (* elements of the datatype come before elements generated *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1971
                            (* by 'Const (s, T)' iff they are generated by a           *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1972
                            (* constructor in constrs1                                 *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1973
                            val offset = size_of_dtyp ctxt typs' descr typ_assoc constrs1
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1974
                            (* compute the total (current) size of the datatype *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1975
                            val total = offset +
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1976
                              size_of_dtyp ctxt typs' descr typ_assoc constrs2
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1977
                            (* sanity check *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1978
                            val _ = if total <> size_of_type ctxt (typs, [])
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1979
                              (Type (s', Ts')) then
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  1980
                                raise REFUTE ("IDT_constructor_interpreter",
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1981
                                  "total is not equal to current size")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1982
                              else ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1983
                            (* returns an interpretation where everything is mapped to *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1984
                            (* an "undefined" element of the datatype                  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1985
                            fun make_undef [] = Leaf (replicate total False)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1986
                              | make_undef (d::ds) =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1987
                                  let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1988
                                    (* compute the current size of the type 'd' *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1989
                                    val dT   = typ_of_dtyp descr typ_assoc d
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  1990
                                    val size = size_of_type ctxt (typs, []) dT
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1991
                                  in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1992
                                    Node (replicate size (make_undef ds))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1993
                                  end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1994
                            (* returns the interpretation for a constructor *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1995
                            fun make_constr [] offset =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1996
                                  if offset < total then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1997
                                    (Leaf (replicate offset False @ True ::
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1998
                                      (replicate (total - offset - 1) False)), offset + 1)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  1999
                                  else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2000
                                    raise REFUTE ("IDT_constructor_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2001
                                      "offset >= total")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2002
                              | make_constr (d::ds) offset =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2003
                                  let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2004
                                    val dT = typ_of_dtyp descr typ_assoc d
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2005
                                    (* compute canonical term representations for all   *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2006
                                    (* elements of the type 'd' (with the reduced depth *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2007
                                    (* for the IDT)                                     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2008
                                    val terms' = canonical_terms typs' dT
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2009
                                    (* sanity check *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2010
                                    val _ =
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2011
                                      if length terms' <> size_of_type ctxt (typs', []) dT
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2012
                                      then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2013
                                        raise REFUTE ("IDT_constructor_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2014
                                          "length of terms' is not equal to old size")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2015
                                      else ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2016
                                    (* compute canonical term representations for all   *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2017
                                    (* elements of the type 'd' (with the current depth *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2018
                                    (* for the IDT)                                     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2019
                                    val terms = canonical_terms typs dT
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2020
                                    (* sanity check *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2021
                                    val _ =
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2022
                                      if length terms <> size_of_type ctxt (typs, []) dT
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2023
                                      then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2024
                                        raise REFUTE ("IDT_constructor_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2025
                                          "length of terms is not equal to current size")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2026
                                      else ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2027
                                    (* sanity check *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2028
                                    val _ =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2029
                                      if length terms < length terms' then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2030
                                        raise REFUTE ("IDT_constructor_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2031
                                          "current size is less than old size")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2032
                                      else ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2033
                                    (* sanity check: every element of terms' must also be *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2034
                                    (*               present in terms                     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2035
                                    val _ =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2036
                                      if forall (member (op =) terms) terms' then ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2037
                                      else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2038
                                        raise REFUTE ("IDT_constructor_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2039
                                          "element has disappeared")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2040
                                    (* sanity check: the order on elements of terms' is    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2041
                                    (*               the same in terms, for those elements *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2042
                                    val _ =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2043
                                      let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2044
                                        fun search (x::xs) (y::ys) =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2045
                                              if x = y then search xs ys else search (x::xs) ys
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  2046
                                          | search (_::_) [] =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2047
                                              raise REFUTE ("IDT_constructor_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2048
                                                "element order not preserved")
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2049
                                          | search [] _ = ()
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2050
                                      in search terms' terms end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2051
                                    val (intrs, new_offset) =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2052
                                      fold_map (fn t_elem => fn off =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2053
                                        (* if 't_elem' existed at the previous depth,    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2054
                                        (* proceed recursively, otherwise map the entire *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2055
                                        (* subtree to "undefined"                        *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2056
                                        if member (op =) terms' t_elem then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2057
                                          make_constr ds off
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2058
                                        else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2059
                                          (make_undef ds, off))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2060
                                      terms offset
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2061
                                  in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2062
                                    (Node intrs, new_offset)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2063
                                  end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2064
                          in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2065
                            SOME (fst (make_constr ctypes offset), model, args)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2066
                          end
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2067
                    end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2068
                | NONE =>  (* body type is not an inductive datatype *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2069
                    NONE)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2070
            | _ =>  (* body type is a (free or schematic) type variable *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2071
              NONE)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2072
        | _ =>  (* term is not a constant *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2073
          NONE)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2074
  end;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  2075
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2076
(* Difficult code ahead.  Make sure you understand the                *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2077
(* 'IDT_constructor_interpreter' and the order in which it enumerates *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2078
(* elements of an IDT before you try to understand this function.     *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2079
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2080
fun IDT_recursion_interpreter ctxt model args t =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2081
  let
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 42137
diff changeset
  2082
    val thy = Proof_Context.theory_of ctxt
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2083
  in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2084
    (* careful: here we descend arbitrarily deep into 't', possibly before *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2085
    (* any other interpreter for atomic terms has had a chance to look at  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2086
    (* 't'                                                                 *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2087
    case strip_comb t of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2088
      (Const (s, T), params) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2089
        (* iterate over all datatypes in 'thy' *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2090
        Symtab.fold (fn (_, info) => fn result =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2091
          case result of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2092
            SOME _ =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2093
              result  (* just keep 'result' *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2094
          | NONE =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2095
              if member (op =) (#rec_names info) s then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2096
                (* we do have a recursion operator of one of the (mutually *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2097
                (* recursive) datatypes given by 'info'                    *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2098
                let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2099
                  (* number of all constructors, including those of different  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2100
                  (* (mutually recursive) datatypes within the same descriptor *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2101
                  val mconstrs_count =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2102
                    Integer.sum (map (fn (_, (_, _, cs)) => length cs) (#descr info))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2103
                in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2104
                  if mconstrs_count < length params then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2105
                    (* too many actual parameters; for now we'll use the *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2106
                    (* 'stlc_interpreter' to strip off one application   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2107
                    NONE
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2108
                  else if mconstrs_count > length params then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2109
                    (* too few actual parameters; we use eta expansion          *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2110
                    (* Note that the resulting expansion of lambda abstractions *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2111
                    (* by the 'stlc_interpreter' may be rather slow (depending  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2112
                    (* on the argument types and the size of the IDT, of        *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2113
                    (* course).                                                 *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2114
                    SOME (interpret ctxt model args (eta_expand t
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2115
                      (mconstrs_count - length params)))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2116
                  else  (* mconstrs_count = length params *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2117
                    let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2118
                      (* interpret each parameter separately *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2119
                      val (p_intrs, (model', args')) = fold_map (fn p => fn (m, a) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2120
                        let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2121
                          val (i, m', a') = interpret ctxt m a p
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2122
                        in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2123
                          (i, (m', a'))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2124
                        end) params (model, args)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2125
                      val (typs, _) = model'
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2126
                      (* 'index' is /not/ necessarily the index of the IDT that *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2127
                      (* the recursion operator is associated with, but merely  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2128
                      (* the index of some mutually recursive IDT               *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2129
                      val index         = #index info
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2130
                      val descr         = #descr info
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2131
                      val (_, dtyps, _) = the (AList.lookup (op =) descr index)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2132
                      (* sanity check: we assume that the order of constructors *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2133
                      (*               in 'descr' is the same as the order of   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2134
                      (*               corresponding parameters, otherwise the  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2135
                      (*               association code below won't match the   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2136
                      (*               right constructors/parameters; we also   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2137
                      (*               assume that the order of recursion       *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2138
                      (*               operators in '#rec_names info' is the    *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2139
                      (*               same as the order of corresponding       *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2140
                      (*               datatypes in 'descr'                     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2141
                      val _ = if map fst descr <> (0 upto (length descr - 1)) then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2142
                          raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2143
                            "order of constructors and corresponding parameters/" ^
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2144
                              "recursion operators and corresponding datatypes " ^
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2145
                              "different?")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2146
                        else ()
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2147
                      (* sanity check: every element in 'dtyps' must be a *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2148
                      (*               'DtTFree'                          *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2149
                      val _ =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2150
                        if Library.exists (fn d =>
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2151
                          case d of Datatype.DtTFree _ => false
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2152
                                  | _ => true) dtyps
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2153
                        then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2154
                          raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2155
                            "datatype argument is not a variable")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2156
                        else ()
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2157
                      (* the type of a recursion operator is *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2158
                      (* [T1, ..., Tn, IDT] ---> Tresult     *)
42364
8c674b3b8e44 eliminated old List.nth;
wenzelm
parents: 42361
diff changeset
  2159
                      val IDT = nth (binder_types T) mconstrs_count
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2160
                      (* by our assumption on the order of recursion operators *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2161
                      (* and datatypes, this is the index of the datatype      *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2162
                      (* corresponding to the given recursion operator         *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2163
                      val idt_index = find_index (fn s' => s' = s) (#rec_names info)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2164
                      (* mutually recursive types must have the same type   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2165
                      (* parameters, unless the mutual recursion comes from *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2166
                      (* indirect recursion                                 *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2167
                      fun rec_typ_assoc acc [] = acc
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2168
                        | rec_typ_assoc acc ((d, T)::xs) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2169
                            (case AList.lookup op= acc d of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2170
                              NONE =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2171
                                (case d of
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2172
                                  Datatype.DtTFree _ =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2173
                                  (* add the association, proceed *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2174
                                  rec_typ_assoc ((d, T)::acc) xs
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2175
                                | Datatype.DtType (s, ds) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2176
                                    let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2177
                                      val (s', Ts) = dest_Type T
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2178
                                    in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2179
                                      if s=s' then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2180
                                        rec_typ_assoc ((d, T)::acc) ((ds ~~ Ts) @ xs)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2181
                                      else
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2182
                                        raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2183
                                          "DtType/Type mismatch")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2184
                                    end
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2185
                                | Datatype.DtRec i =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2186
                                    let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2187
                                      val (_, ds, _) = the (AList.lookup (op =) descr i)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2188
                                      val (_, Ts)    = dest_Type T
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2189
                                    in
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2190
                                      rec_typ_assoc ((d, T)::acc) ((ds ~~ Ts) @ xs)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2191
                                    end)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2192
                            | SOME T' =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2193
                                if T=T' then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2194
                                  (* ignore the association since it's already *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2195
                                  (* present, proceed                          *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2196
                                  rec_typ_assoc acc xs
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2197
                                else
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2198
                                  raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2199
                                    "different type associations for the same dtyp"))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2200
                      val typ_assoc = filter
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2201
                        (fn (Datatype.DtTFree _, _) => true | (_, _) => false)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2202
                        (rec_typ_assoc []
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2203
                          (#2 (the (AList.lookup (op =) descr idt_index)) ~~ (snd o dest_Type) IDT))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2204
                      (* sanity check: typ_assoc must associate types to the   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2205
                      (*               elements of 'dtyps' (and only to those) *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2206
                      val _ =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2207
                        if not (eq_set (op =) (dtyps, map fst typ_assoc))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2208
                        then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2209
                          raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2210
                            "type association has extra/missing elements")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2211
                        else ()
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2212
                      (* interpret each constructor in the descriptor (including *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2213
                      (* those of mutually recursive datatypes)                  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2214
                      (* (int * interpretation list) list *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2215
                      val mc_intrs = map (fn (idx, (_, _, cs)) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2216
                        let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2217
                          val c_return_typ = typ_of_dtyp descr typ_assoc
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2218
                            (Datatype.DtRec idx)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2219
                        in
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2220
                          (idx, map (fn (cname, cargs) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2221
                            (#1 o interpret ctxt (typs, []) {maxvars=0,
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2222
                              def_eq=false, next_idx=1, bounds=[],
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2223
                              wellformed=True}) (Const (cname, map (typ_of_dtyp
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2224
                              descr typ_assoc) cargs ---> c_return_typ))) cs)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2225
                        end) descr
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2226
                      (* associate constructors with corresponding parameters *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2227
                      (* (int * (interpretation * interpretation) list) list *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2228
                      val (mc_p_intrs, p_intrs') = fold_map
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2229
                        (fn (idx, c_intrs) => fn p_intrs' =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2230
                          let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2231
                            val len = length c_intrs
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2232
                          in
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2233
                            ((idx, c_intrs ~~ List.take (p_intrs', len)),
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2234
                              List.drop (p_intrs', len))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2235
                          end) mc_intrs p_intrs
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2236
                      (* sanity check: no 'p_intr' may be left afterwards *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2237
                      val _ =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2238
                        if p_intrs' <> [] then
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2239
                          raise REFUTE ("IDT_recursion_interpreter",
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2240
                            "more parameter than constructor interpretations")
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2241
                        else ()
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2242
                      (* The recursion operator, applied to 'mconstrs_count'     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2243
                      (* arguments, is a function that maps every element of the *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2244
                      (* inductive datatype to an element of some result type.   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2245
                      (* Recursion operators for mutually recursive IDTs are     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2246
                      (* translated simultaneously.                              *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2247
                      (* Since the order on datatype elements is given by an     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2248
                      (* order on constructors (and then by the order on         *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2249
                      (* argument tuples), we can simply copy corresponding      *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2250
                      (* subtrees from 'p_intrs', in the order in which they are *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2251
                      (* given.                                                  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2252
                      fun ci_pi (Leaf xs, pi) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2253
                            (* if the constructor does not match the arguments to a *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2254
                            (* defined element of the IDT, the corresponding value  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2255
                            (* of the parameter must be ignored                     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2256
                            if List.exists (equal True) xs then [pi] else []
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2257
                        | ci_pi (Node xs, Node ys) = maps ci_pi (xs ~~ ys)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2258
                        | ci_pi (Node _, Leaf _) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2259
                            raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2260
                              "constructor takes more arguments than the " ^
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2261
                                "associated parameter")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2262
                      val rec_operators = map (fn (idx, c_p_intrs) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2263
                        (idx, maps ci_pi c_p_intrs)) mc_p_intrs
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2264
                      (* sanity check: every recursion operator must provide as  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2265
                      (*               many values as the corresponding datatype *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2266
                      (*               has elements                              *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2267
                      val _ = map (fn (idx, intrs) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2268
                        let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2269
                          val T = typ_of_dtyp descr typ_assoc
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2270
                            (Datatype.DtRec idx)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2271
                        in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2272
                          if length intrs <> size_of_type ctxt (typs, []) T then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2273
                            raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2274
                              "wrong number of interpretations for rec. operator")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2275
                          else ()
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2276
                        end) rec_operators
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2277
                      (* For non-recursive datatypes, we are pretty much done at *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2278
                      (* this point.  For recursive datatypes however, we still  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2279
                      (* need to apply the interpretations in 'rec_operators' to *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2280
                      (* (recursively obtained) interpretations for recursive    *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2281
                      (* constructor arguments.  To do so more efficiently, we   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2282
                      (* copy 'rec_operators' into arrays first.  Each Boolean   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2283
                      (* indicates whether the recursive arguments have been     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2284
                      (* considered already.                                     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2285
                      val REC_OPERATORS = map (fn (idx, intrs) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2286
                        (idx, Array.fromList (map (pair false) intrs)))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2287
                        rec_operators
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2288
                      (* takes an interpretation, and if some leaf of this     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2289
                      (* interpretation is the 'elem'-th element of the type,  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2290
                      (* the indices of the arguments leading to this leaf are *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2291
                      (* returned                                              *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2292
                      fun get_args (Leaf xs) elem =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2293
                            if find_index (fn x => x = True) xs = elem then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2294
                              SOME []
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2295
                            else
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2296
                              NONE
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2297
                        | get_args (Node xs) elem =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2298
                            let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2299
                              fun search ([], _) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2300
                                NONE
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2301
                                | search (x::xs, n) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2302
                                (case get_args x elem of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2303
                                  SOME result => SOME (n::result)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2304
                                | NONE        => search (xs, n+1))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2305
                            in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2306
                              search (xs, 0)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2307
                            end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2308
                      (* returns the index of the constructor and indices for *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2309
                      (* its arguments that generate the 'elem'-th element of *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2310
                      (* the datatype given by 'idx'                          *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2311
                      fun get_cargs idx elem =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2312
                        let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2313
                          fun get_cargs_rec (_, []) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2314
                                raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2315
                                  "no matching constructor found for datatype element")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2316
                            | get_cargs_rec (n, x::xs) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2317
                                (case get_args x elem of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2318
                                  SOME args => (n, args)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2319
                                | NONE => get_cargs_rec (n+1, xs))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2320
                        in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2321
                          get_cargs_rec (0, the (AList.lookup (op =) mc_intrs idx))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2322
                        end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2323
                      (* computes one entry in 'REC_OPERATORS', and recursively *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2324
                      (* all entries needed for it, where 'idx' gives the       *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2325
                      (* datatype and 'elem' the element of it                  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2326
                      fun compute_array_entry idx elem =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2327
                        let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2328
                          val arr = the (AList.lookup (op =) REC_OPERATORS idx)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2329
                          val (flag, intr) = Array.sub (arr, elem)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2330
                        in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2331
                          if flag then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2332
                            (* simply return the previously computed result *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2333
                            intr
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2334
                          else
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2335
                            (* we have to apply 'intr' to interpretations for all *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2336
                            (* recursive arguments                                *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2337
                            let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2338
                              val (c, args) = get_cargs idx elem
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2339
                              (* find the indices of the constructor's /recursive/ *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2340
                              (* arguments                                         *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2341
                              val (_, _, constrs) = the (AList.lookup (op =) descr idx)
42364
8c674b3b8e44 eliminated old List.nth;
wenzelm
parents: 42361
diff changeset
  2342
                              val (_, dtyps) = nth constrs c
8c674b3b8e44 eliminated old List.nth;
wenzelm
parents: 42361
diff changeset
  2343
                              val rec_dtyps_args = filter
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2344
                                (Datatype_Aux.is_rec_type o fst) (dtyps ~~ args)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2345
                              (* map those indices to interpretations *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2346
                              val rec_dtyps_intrs = map (fn (dtyp, arg) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2347
                                let
42364
8c674b3b8e44 eliminated old List.nth;
wenzelm
parents: 42361
diff changeset
  2348
                                  val dT = typ_of_dtyp descr typ_assoc dtyp
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2349
                                  val consts = make_constants ctxt (typs, []) dT
42364
8c674b3b8e44 eliminated old List.nth;
wenzelm
parents: 42361
diff changeset
  2350
                                  val arg_i = nth consts arg
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2351
                                in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2352
                                  (dtyp, arg_i)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2353
                                end) rec_dtyps_args
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2354
                              (* takes the dtyp and interpretation of an element, *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2355
                              (* and computes the interpretation for the          *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2356
                              (* corresponding recursive argument                 *)
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2357
                              fun rec_intr (Datatype.DtRec i) (Leaf xs) =
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2358
                                    (* recursive argument is "rec_i params elem" *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2359
                                    compute_array_entry i (find_index (fn x => x = True) xs)
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2360
                                | rec_intr (Datatype.DtRec _) (Node _) =
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2361
                                    raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2362
                                      "interpretation for IDT is a node")
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  2363
                                | rec_intr (Datatype.DtType ("fun", [_, dt2])) (Node xs) =
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2364
                                    (* recursive argument is something like     *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2365
                                    (* "\<lambda>x::dt1. rec_? params (elem x)" *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2366
                                    Node (map (rec_intr dt2) xs)
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2367
                                | rec_intr (Datatype.DtType ("fun", [_, _])) (Leaf _) =
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2368
                                    raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2369
                                      "interpretation for function dtyp is a leaf")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2370
                                | rec_intr _ _ =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2371
                                    (* admissibility ensures that every recursive type *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2372
                                    (* is of the form 'Dt_1 -> ... -> Dt_k ->          *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2373
                                    (* (DtRec i)'                                      *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2374
                                    raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2375
                                      "non-recursive codomain in recursive dtyp")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2376
                              (* obtain interpretations for recursive arguments *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2377
                              (* interpretation list *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2378
                              val arg_intrs = map (uncurry rec_intr) rec_dtyps_intrs
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2379
                              (* apply 'intr' to all recursive arguments *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2380
                              val result = fold (fn arg_i => fn i =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2381
                                interpretation_apply (i, arg_i)) arg_intrs intr
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2382
                              (* update 'REC_OPERATORS' *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2383
                              val _ = Array.update (arr, elem, (true, result))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2384
                            in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2385
                              result
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2386
                            end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2387
                        end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2388
                      val idt_size = Array.length (the (AList.lookup (op =) REC_OPERATORS idt_index))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2389
                      (* sanity check: the size of 'IDT' should be 'idt_size' *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2390
                      val _ =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2391
                          if idt_size <> size_of_type ctxt (typs, []) IDT then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2392
                            raise REFUTE ("IDT_recursion_interpreter",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2393
                              "unexpected size of IDT (wrong type associated?)")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2394
                          else ()
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2395
                      val rec_op = Node (map_range (compute_array_entry idt_index) idt_size)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2396
                    in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2397
                      SOME (rec_op, model', args')
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2398
                    end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2399
                end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2400
              else
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2401
                NONE  (* not a recursion operator of this datatype *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2402
          ) (Datatype.get_all thy) NONE
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2403
    | _ =>  (* head of term is not a constant *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2404
      NONE
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2405
  end;
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2406
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2407
fun set_interpreter ctxt model args t =
29956
62f931b257b7 Reintroduce set_interpreter for Collect and op :.
blanchet
parents: 29820
diff changeset
  2408
  let
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2409
    val (typs, terms) = model
29956
62f931b257b7 Reintroduce set_interpreter for Collect and op :.
blanchet
parents: 29820
diff changeset
  2410
  in
62f931b257b7 Reintroduce set_interpreter for Collect and op :.
blanchet
parents: 29820
diff changeset
  2411
    case AList.lookup (op =) terms t of
62f931b257b7 Reintroduce set_interpreter for Collect and op :.
blanchet
parents: 29820
diff changeset
  2412
      SOME intr =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2413
        (* return an existing interpretation *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2414
        SOME (intr, model, args)
29956
62f931b257b7 Reintroduce set_interpreter for Collect and op :.
blanchet
parents: 29820
diff changeset
  2415
    | NONE =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2416
        (case t of
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2417
          Free (x, Type (@{type_name set}, [T])) =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2418
          let
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2419
            val (intr, _, args') =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2420
              interpret ctxt (typs, []) args (Free (x, T --> HOLogic.boolT))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2421
          in
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2422
            SOME (intr, (typs, (t, intr)::terms), args')
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2423
          end
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2424
        | Var ((x, i), Type (@{type_name set}, [T])) =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2425
          let
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2426
            val (intr, _, args') =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2427
              interpret ctxt (typs, []) args (Var ((x,i), T --> HOLogic.boolT))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2428
          in
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2429
            SOME (intr, (typs, (t, intr)::terms), args')
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2430
          end
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2431
        | Const (s, Type (@{type_name set}, [T])) =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2432
          let
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2433
            val (intr, _, args') =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2434
              interpret ctxt (typs, []) args (Const (s, T --> HOLogic.boolT))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2435
          in
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2436
            SOME (intr, (typs, (t, intr)::terms), args')
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2437
          end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2438
        (* 'Collect' == identity *)
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2439
        | Const (@{const_name Collect}, _) $ t1 =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2440
            SOME (interpret ctxt model args t1)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2441
        | Const (@{const_name Collect}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2442
            SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2443
        (* 'op :' == application *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2444
        | Const (@{const_name Set.member}, _) $ t1 $ t2 =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2445
            SOME (interpret ctxt model args (t2 $ t1))
46096
a00685a18e55 tuned Refute
blanchet
parents: 45896
diff changeset
  2446
        | Const (@{const_name Set.member}, _) $ _ =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2447
            SOME (interpret ctxt model args (eta_expand t 1))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2448
        | Const (@{const_name Set.member}, _) =>
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2449
            SOME (interpret ctxt model args (eta_expand t 2))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2450
        | _ => NONE)
29956
62f931b257b7 Reintroduce set_interpreter for Collect and op :.
blanchet
parents: 29820
diff changeset
  2451
  end;
62f931b257b7 Reintroduce set_interpreter for Collect and op :.
blanchet
parents: 29820
diff changeset
  2452
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2453
(* only an optimization: 'card' could in principle be interpreted with *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2454
(* interpreters available already (using its definition), but the code *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2455
(* below is more efficient                                             *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  2456
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2457
fun Finite_Set_card_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2458
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2459
    Const (@{const_name Finite_Set.card},
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2460
        Type ("fun", [Type (@{type_name set}, [T]), @{typ nat}])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2461
      let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2462
        fun number_of_elements (Node xs) =
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2463
            fold (fn x => fn n =>
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2464
              if x = TT then
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2465
                n + 1
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2466
              else if x = FF then
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2467
                n
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2468
              else
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2469
                raise REFUTE ("Finite_Set_card_interpreter",
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2470
                  "interpretation for set type does not yield a Boolean"))
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2471
              xs 0
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2472
          | number_of_elements (Leaf _) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2473
              raise REFUTE ("Finite_Set_card_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2474
                "interpretation for set type is a leaf")
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2475
        val size_of_nat = size_of_type ctxt model (@{typ nat})
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2476
        (* takes an interpretation for a set and returns an interpretation *)
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2477
        (* for a 'nat' denoting the set's cardinality                      *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2478
        fun card i =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2479
          let
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2480
            val n = number_of_elements i
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2481
          in
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2482
            if n < size_of_nat then
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2483
              Leaf ((replicate n False) @ True ::
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2484
                (replicate (size_of_nat-n-1) False))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2485
            else
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2486
              Leaf (replicate size_of_nat False)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2487
          end
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2488
        val set_constants = make_constants ctxt model (HOLogic.mk_setT T)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2489
      in
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2490
        SOME (Node (map card set_constants), model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2491
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2492
  | _ => NONE;
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  2493
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2494
(* only an optimization: 'finite' could in principle be interpreted with  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2495
(* interpreters available already (using its definition), but the code    *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2496
(* below is more efficient                                                *)
22093
98e3e9f00192 interpreter for Finite_Set.finite added
webertj
parents: 22092
diff changeset
  2497
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2498
fun Finite_Set_finite_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2499
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2500
    Const (@{const_name Finite_Set.finite},
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2501
           Type ("fun", [_, @{typ bool}])) $ _ =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2502
        (* we only consider finite models anyway, hence EVERY set is *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2503
        (* "finite"                                                  *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2504
        SOME (TT, model, args)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2505
  | Const (@{const_name Finite_Set.finite},
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2506
           Type ("fun", [set_T, @{typ bool}])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2507
      let
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2508
        val size_of_set = size_of_type ctxt model set_T
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2509
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2510
        (* we only consider finite models anyway, hence EVERY set is *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2511
        (* "finite"                                                  *)
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2512
        SOME (Node (replicate size_of_set TT), model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2513
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2514
  | _ => NONE;
22093
98e3e9f00192 interpreter for Finite_Set.finite added
webertj
parents: 22092
diff changeset
  2515
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2516
(* only an optimization: 'less' could in principle be interpreted with *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2517
(* interpreters available already (using its definition), but the code     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2518
(* below is more efficient                                                 *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2519
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2520
fun Nat_less_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2521
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2522
    Const (@{const_name Orderings.less}, Type ("fun", [@{typ nat},
38553
56965d8e4e11 use HOLogic.boolT and @{typ bool} more pervasively
haftmann
parents: 37677
diff changeset
  2523
        Type ("fun", [@{typ nat}, @{typ bool}])])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2524
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2525
        val size_of_nat = size_of_type ctxt model (@{typ nat})
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2526
        (* the 'n'-th nat is not less than the first 'n' nats, while it *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2527
        (* is less than the remaining 'size_of_nat - n' nats            *)
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2528
        fun less n = Node ((replicate n FF) @ (replicate (size_of_nat - n) TT))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2529
      in
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2530
        SOME (Node (map less (1 upto size_of_nat)), model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2531
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2532
  | _ => NONE;
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2533
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2534
(* only an optimization: 'plus' could in principle be interpreted with *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2535
(* interpreters available already (using its definition), but the code     *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2536
(* below is more efficient                                                 *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2537
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2538
fun Nat_plus_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2539
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2540
    Const (@{const_name Groups.plus}, Type ("fun", [@{typ nat},
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
  2541
        Type ("fun", [@{typ nat}, @{typ nat}])])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2542
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2543
        val size_of_nat = size_of_type ctxt model (@{typ nat})
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2544
        fun plus m n =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2545
          let
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2546
            val element = m + n
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2547
          in
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2548
            if element > size_of_nat - 1 then
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2549
              Leaf (replicate size_of_nat False)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2550
            else
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2551
              Leaf ((replicate element False) @ True ::
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2552
                (replicate (size_of_nat - element - 1) False))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2553
          end
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2554
      in
33063
4d462963a7db map_range (and map_index) combinator
haftmann
parents: 33055
diff changeset
  2555
        SOME (Node (map_range (fn m => Node (map_range (plus m) size_of_nat)) size_of_nat),
4d462963a7db map_range (and map_index) combinator
haftmann
parents: 33055
diff changeset
  2556
          model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2557
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2558
  | _ => NONE;
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2559
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2560
(* only an optimization: 'minus' could in principle be interpreted *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2561
(* with interpreters available already (using its definition), but the *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2562
(* code below is more efficient                                        *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2563
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2564
fun Nat_minus_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2565
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2566
    Const (@{const_name Groups.minus}, Type ("fun", [@{typ nat},
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
  2567
        Type ("fun", [@{typ nat}, @{typ nat}])])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2568
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2569
        val size_of_nat = size_of_type ctxt model (@{typ nat})
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2570
        fun minus m n =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2571
          let
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2572
            val element = Int.max (m-n, 0)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2573
          in
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2574
            Leaf ((replicate element False) @ True ::
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2575
              (replicate (size_of_nat - element - 1) False))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2576
          end
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2577
      in
33063
4d462963a7db map_range (and map_index) combinator
haftmann
parents: 33055
diff changeset
  2578
        SOME (Node (map_range (fn m => Node (map_range (minus m) size_of_nat)) size_of_nat),
4d462963a7db map_range (and map_index) combinator
haftmann
parents: 33055
diff changeset
  2579
          model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2580
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2581
  | _ => NONE;
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2582
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2583
(* only an optimization: 'times' could in principle be interpreted *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2584
(* with interpreters available already (using its definition), but the *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2585
(* code below is more efficient                                        *)
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2586
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2587
fun Nat_times_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2588
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2589
    Const (@{const_name Groups.times}, Type ("fun", [@{typ nat},
37388
793618618f78 tuned quotes, antiquotations and whitespace
haftmann
parents: 37254
diff changeset
  2590
        Type ("fun", [@{typ nat}, @{typ nat}])])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2591
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2592
        val size_of_nat = size_of_type ctxt model (@{typ nat})
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2593
        fun mult m n =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2594
          let
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2595
            val element = m * n
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2596
          in
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2597
            if element > size_of_nat - 1 then
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2598
              Leaf (replicate size_of_nat False)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2599
            else
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2600
              Leaf ((replicate element False) @ True ::
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2601
                (replicate (size_of_nat - element - 1) False))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2602
          end
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2603
      in
33063
4d462963a7db map_range (and map_index) combinator
haftmann
parents: 33055
diff changeset
  2604
        SOME (Node (map_range (fn m => Node (map_range (mult m) size_of_nat)) size_of_nat),
4d462963a7db map_range (and map_index) combinator
haftmann
parents: 33055
diff changeset
  2605
          model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2606
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2607
  | _ => NONE;
15547
f08e2d83681e major code change: refute can now handle recursion and axiomatic type classes; 3-valued logic with two kinds of equality; some bugfixes
webertj
parents: 15531
diff changeset
  2608
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2609
(* only an optimization: 'append' could in principle be interpreted with *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2610
(* interpreters available already (using its definition), but the code   *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2611
(* below is more efficient                                               *)
15767
8ed9fcc004fe support for recursion over mutually recursive IDTs
webertj
parents: 15611
diff changeset
  2612
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2613
fun List_append_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2614
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2615
    Const (@{const_name List.append}, Type ("fun", [Type ("List.list", [T]), Type ("fun",
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2616
        [Type ("List.list", [_]), Type ("List.list", [_])])])) =>
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2617
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2618
        val size_elem = size_of_type ctxt model T
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2619
        val size_list = size_of_type ctxt model (Type ("List.list", [T]))
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2620
        (* maximal length of lists; 0 if we only consider the empty list *)
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2621
        val list_length =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2622
          let
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2623
            fun list_length_acc len lists total =
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2624
              if lists = total then
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2625
                len
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2626
              else if lists < total then
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2627
                list_length_acc (len+1) (lists*size_elem) (total-lists)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2628
              else
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2629
                raise REFUTE ("List_append_interpreter",
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2630
                  "size_list not equal to 1 + size_elem + ... + " ^
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2631
                    "size_elem^len, for some len")
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2632
          in
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2633
            list_length_acc 0 1 size_list
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2634
          end
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2635
        val elements = 0 upto (size_list-1)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2636
        (* FIXME: there should be a nice formula, which computes the same as *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2637
        (*        the following, but without all this intermediate tree      *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2638
        (*        length/offset stuff                                        *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2639
        (* associate each list with its length and offset in a complete tree *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2640
        (* of width 'size_elem' and depth 'length_list' (with 'size_list'    *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2641
        (* nodes total)                                                      *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2642
        (* (int * (int * int)) list *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2643
        val (lenoff_lists, _) = fold_map (fn elem => fn (offsets, off) =>
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2644
          (* corresponds to a pre-order traversal of the tree *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2645
          let
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2646
            val len = length offsets
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2647
            (* associate the given element with len/off *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2648
            val assoc = (elem, (len, off))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2649
          in
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2650
            if len < list_length then
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2651
              (* go to first child node *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2652
              (assoc, (off :: offsets, off * size_elem))
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2653
            else if off mod size_elem < size_elem - 1 then
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2654
              (* go to next sibling node *)
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2655
              (assoc, (offsets, off + 1))
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2656
            else
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2657
              (* go back up the stack until we find a level where we can go *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2658
              (* to the next sibling node                                   *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2659
              let
48902
44a6967240b7 prefer classic take_prefix/take_suffix over chop_while (cf. 0659e84bdc5f);
wenzelm
parents: 46961
diff changeset
  2660
                val offsets' = snd (take_prefix
39811
0659e84bdc5f chop_while replace drop_while and take_while
haftmann
parents: 39809
diff changeset
  2661
                  (fn off' => off' mod size_elem = size_elem - 1) offsets)
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2662
              in
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2663
                case offsets' of
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2664
                  [] =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2665
                    (* we're at the last node in the tree; the next value *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2666
                    (* won't be used anyway                               *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2667
                    (assoc, ([], 0))
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2668
                | off'::offs' =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2669
                    (* go to next sibling node *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2670
                    (assoc, (offs', off' + 1))
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2671
              end
33246
46e47aa1558f eliminated some old folds;
wenzelm
parents: 33243
diff changeset
  2672
          end) elements ([], 0)
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2673
        (* we also need the reverse association (from length/offset to *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2674
        (* index)                                                      *)
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2675
        val lenoff'_lists = map Library.swap lenoff_lists
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2676
        (* returns the interpretation for "(list no. m) @ (list no. n)" *)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2677
        fun append m n =
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2678
          let
29288
253bcf2a5854 avoid polymorphic equality;
wenzelm
parents: 29272
diff changeset
  2679
            val (len_m, off_m) = the (AList.lookup (op =) lenoff_lists m)
253bcf2a5854 avoid polymorphic equality;
wenzelm
parents: 29272
diff changeset
  2680
            val (len_n, off_n) = the (AList.lookup (op =) lenoff_lists n)
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2681
            val len_elem = len_m + len_n
39047
cdff476ba39e use existing Integer.pow, despite its slightly odd argument order;
wenzelm
parents: 39046
diff changeset
  2682
            val off_elem = off_m * Integer.pow len_n size_elem + off_n
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2683
          in
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2684
            case AList.lookup op= lenoff'_lists (len_elem, off_elem) of
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2685
              NONE =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2686
                (* undefined *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2687
                Leaf (replicate size_list False)
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2688
            | SOME element =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2689
                Leaf ((replicate element False) @ True ::
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2690
                  (replicate (size_list - element - 1) False))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2691
          end
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2692
      in
25032
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2693
        SOME (Node (map (fn m => Node (map (append m) elements)) elements),
f7095d7cb9a3 interpreter for List.append added again
webertj
parents: 25014
diff changeset
  2694
          model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2695
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2696
  | _ => NONE;
15767
8ed9fcc004fe support for recursion over mutually recursive IDTs
webertj
parents: 15611
diff changeset
  2697
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2698
(* only an optimization: 'lfp' could in principle be interpreted with  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2699
(* interpreters available already (using its definition), but the code *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2700
(* below is more efficient                                             *)
16050
828fc32f390f interpreters for lfp/gfp added
webertj
parents: 15794
diff changeset
  2701
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2702
fun lfp_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2703
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2704
    Const (@{const_name lfp}, Type ("fun", [Type ("fun",
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2705
      [Type (@{type_name set}, [T]),
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2706
       Type (@{type_name set}, [_])]),
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2707
       Type (@{type_name set}, [_])])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2708
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2709
        val size_elem = size_of_type ctxt model T
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2710
        (* the universe (i.e. the set that contains every element) *)
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2711
        val i_univ = Node (replicate size_elem TT)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2712
        (* all sets with elements from type 'T' *)
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2713
        val i_sets = make_constants ctxt model (HOLogic.mk_setT T)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2714
        (* all functions that map sets to sets *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2715
        val i_funs = make_constants ctxt model (Type ("fun",
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2716
          [HOLogic.mk_setT T, HOLogic.mk_setT T]))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2717
        (* "lfp(f) == Inter({u. f(u) <= u})" *)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2718
        fun is_subset (Node subs, Node sups) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2719
              forall (fn (sub, sup) => (sub = FF) orelse (sup = TT)) (subs ~~ sups)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2720
          | is_subset (_, _) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2721
              raise REFUTE ("lfp_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2722
                "is_subset: interpretation for set is not a node")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2723
        fun intersection (Node xs, Node ys) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2724
              Node (map (fn (x, y) => if x=TT andalso y=TT then TT else FF)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2725
                (xs ~~ ys))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2726
          | intersection (_, _) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2727
              raise REFUTE ("lfp_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2728
                "intersection: interpretation for set is not a node")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2729
        fun lfp (Node resultsets) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2730
              fold (fn (set, resultset) => fn acc =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2731
                if is_subset (resultset, set) then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2732
                  intersection (acc, set)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2733
                else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2734
                  acc) (i_sets ~~ resultsets) i_univ
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2735
          | lfp _ =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2736
              raise REFUTE ("lfp_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2737
                "lfp: interpretation for function is not a node")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2738
      in
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2739
        SOME (Node (map lfp i_funs), model, args)
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2740
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2741
  | _ => NONE;
16050
828fc32f390f interpreters for lfp/gfp added
webertj
parents: 15794
diff changeset
  2742
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2743
(* only an optimization: 'gfp' could in principle be interpreted with  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2744
(* interpreters available already (using its definition), but the code *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2745
(* below is more efficient                                             *)
16050
828fc32f390f interpreters for lfp/gfp added
webertj
parents: 15794
diff changeset
  2746
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2747
fun gfp_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2748
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2749
    Const (@{const_name gfp}, Type ("fun", [Type ("fun",
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2750
      [Type (@{type_name set}, [T]),
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2751
       Type (@{type_name set}, [_])]),
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2752
       Type (@{type_name set}, [_])])) =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2753
      let
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2754
        val size_elem = size_of_type ctxt model T
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2755
        (* the universe (i.e. the set that contains every element) *)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2756
        val i_univ = Node (replicate size_elem TT)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2757
        (* all sets with elements from type 'T' *)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2758
        val i_sets = make_constants ctxt model (HOLogic.mk_setT T)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2759
        (* all functions that map sets to sets *)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2760
        val i_funs = make_constants ctxt model (Type ("fun",
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2761
          [HOLogic.mk_setT T, HOLogic.mk_setT T]))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2762
        (* "gfp(f) == Union({u. u <= f(u)})" *)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2763
        fun is_subset (Node subs, Node sups) =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2764
              forall (fn (sub, sup) => (sub = FF) orelse (sup = TT))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2765
                (subs ~~ sups)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2766
          | is_subset (_, _) =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2767
              raise REFUTE ("gfp_interpreter",
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2768
                "is_subset: interpretation for set is not a node")
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2769
        fun union (Node xs, Node ys) =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2770
              Node (map (fn (x,y) => if x=TT orelse y=TT then TT else FF)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2771
                   (xs ~~ ys))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2772
          | union (_, _) =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2773
              raise REFUTE ("gfp_interpreter",
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2774
                "union: interpretation for set is not a node")
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2775
        fun gfp (Node resultsets) =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2776
              fold (fn (set, resultset) => fn acc =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2777
                if is_subset (set, resultset) then
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2778
                  union (acc, set)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2779
                else
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2780
                  acc) (i_sets ~~ resultsets) i_univ
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2781
          | gfp _ =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2782
              raise REFUTE ("gfp_interpreter",
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2783
                "gfp: interpretation for function is not a node")
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2784
      in
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2785
        SOME (Node (map gfp i_funs), model, args)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2786
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2787
  | _ => NONE;
16050
828fc32f390f interpreters for lfp/gfp added
webertj
parents: 15794
diff changeset
  2788
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2789
(* only an optimization: 'fst' could in principle be interpreted with  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2790
(* interpreters available already (using its definition), but the code *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2791
(* below is more efficient                                             *)
21267
5294ecae6708 interpreters for fst and snd added
webertj
parents: 21098
diff changeset
  2792
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2793
fun Product_Type_fst_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2794
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2795
    Const (@{const_name fst}, Type ("fun", [Type (@{type_name Product_Type.prod}, [T, U]), _])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2796
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2797
        val constants_T = make_constants ctxt model T
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2798
        val size_U = size_of_type ctxt model U
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2799
      in
32952
aeb1e44fbc19 replaced String.concat by implode;
wenzelm
parents: 32950
diff changeset
  2800
        SOME (Node (maps (replicate size_U) constants_T), model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2801
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2802
  | _ => NONE;
21267
5294ecae6708 interpreters for fst and snd added
webertj
parents: 21098
diff changeset
  2803
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2804
(* only an optimization: 'snd' could in principle be interpreted with  *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2805
(* interpreters available already (using its definition), but the code *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2806
(* below is more efficient                                             *)
21267
5294ecae6708 interpreters for fst and snd added
webertj
parents: 21098
diff changeset
  2807
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2808
fun Product_Type_snd_interpreter ctxt model args t =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2809
  case t of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2810
    Const (@{const_name snd}, Type ("fun", [Type (@{type_name Product_Type.prod}, [T, U]), _])) =>
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2811
      let
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2812
        val size_T = size_of_type ctxt model T
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2813
        val constants_U = make_constants ctxt model U
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2814
      in
32952
aeb1e44fbc19 replaced String.concat by implode;
wenzelm
parents: 32950
diff changeset
  2815
        SOME (Node (flat (replicate size_T constants_U)), model, args)
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2816
      end
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2817
  | _ => NONE;
21267
5294ecae6708 interpreters for fst and snd added
webertj
parents: 21098
diff changeset
  2818
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  2819
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  2820
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  2821
(* PRINTERS                                                                  *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  2822
(* ------------------------------------------------------------------------- *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  2823
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2824
fun stlc_printer ctxt model T intr assignment =
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2825
  let
40720
b770df486e5c explicit use of unprefix;
wenzelm
parents: 40627
diff changeset
  2826
    val strip_leading_quote = perhaps (try (unprefix "'"))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2827
    fun string_of_typ (Type (s, _)) = s
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2828
      | string_of_typ (TFree (x, _)) = strip_leading_quote x
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2829
      | string_of_typ (TVar ((x,i), _)) =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2830
          strip_leading_quote x ^ string_of_int i
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2831
    fun index_from_interpretation (Leaf xs) =
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  2832
          find_index (Prop_Logic.eval assignment) xs
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2833
      | index_from_interpretation _ =
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2834
          raise REFUTE ("stlc_printer",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2835
            "interpretation for ground type is not a leaf")
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2836
  in
25014
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2837
    case T of
b711b0af178e significant code overhaul, bugfix for inductive data types
webertj
parents: 24928
diff changeset
  2838
      Type ("fun", [T1, T2]) =>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2839
        let
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2840
          (* create all constants of type 'T1' *)
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2841
          val constants = make_constants ctxt model T1
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2842
          val results =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2843
            (case intr of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2844
              Node xs => xs
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2845
            | _ => raise REFUTE ("stlc_printer",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2846
              "interpretation for function type is a leaf"))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2847
          (* Term.term list *)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2848
          val pairs = map (fn (arg, result) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2849
            HOLogic.mk_prod
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2850
              (print ctxt model T1 arg assignment,
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2851
               print ctxt model T2 result assignment))
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2852
            (constants ~~ results)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2853
          val HOLogic_prodT = HOLogic.mk_prodT (T1, T2)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2854
          val HOLogic_setT  = HOLogic.mk_setT HOLogic_prodT
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2855
          val HOLogic_empty_set = Const (@{const_abbrev Set.empty}, HOLogic_setT)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2856
          val HOLogic_insert    =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2857
            Const (@{const_name insert}, HOLogic_prodT --> HOLogic_setT --> HOLogic_setT)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2858
        in
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2859
          SOME (fold_rev (fn pair => fn acc => HOLogic_insert $ pair $ acc) pairs HOLogic_empty_set)
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2860
        end
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2861
    | Type ("prop", []) =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2862
        (case index_from_interpretation intr of
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2863
          ~1 => SOME (HOLogic.mk_Trueprop (Const (@{const_name undefined}, HOLogic.boolT)))
45740
132a3e1c0fe5 more antiquotations;
wenzelm
parents: 45387
diff changeset
  2864
        | 0  => SOME (HOLogic.mk_Trueprop @{term True})
132a3e1c0fe5 more antiquotations;
wenzelm
parents: 45387
diff changeset
  2865
        | 1  => SOME (HOLogic.mk_Trueprop @{term False})
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2866
        | _  => raise REFUTE ("stlc_interpreter",
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2867
          "illegal interpretation for a propositional value"))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2868
    | Type _  =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2869
        if index_from_interpretation intr = (~1) then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2870
          SOME (Const (@{const_name undefined}, T))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2871
        else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2872
          SOME (Const (string_of_typ T ^
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2873
            string_of_int (index_from_interpretation intr), T))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2874
    | TFree _ =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2875
        if index_from_interpretation intr = (~1) then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2876
          SOME (Const (@{const_name undefined}, T))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2877
        else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2878
          SOME (Const (string_of_typ T ^
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2879
            string_of_int (index_from_interpretation intr), T))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2880
    | TVar _  =>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2881
        if index_from_interpretation intr = (~1) then
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2882
          SOME (Const (@{const_name undefined}, T))
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2883
        else
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2884
          SOME (Const (string_of_typ T ^
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2885
            string_of_int (index_from_interpretation intr), T))
22567
1565d476a9e2 removed assert/deny (avoid clash with Alice keywords and confusion due to strict evaluation);
wenzelm
parents: 22093
diff changeset
  2886
  end;
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  2887
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2888
fun set_printer ctxt model T intr assignment =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2889
  (case T of
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2890
    Type (@{type_name set}, [T1]) =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2891
    let
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2892
      (* create all constants of type 'T1' *)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2893
      val constants = make_constants ctxt model T1
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2894
      val results = (case intr of
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2895
          Node xs => xs
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2896
        | _       => raise REFUTE ("set_printer",
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2897
          "interpretation for set type is a leaf"))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2898
      val elements = List.mapPartial (fn (arg, result) =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2899
        case result of
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2900
          Leaf [fmTrue, (* fmFalse *) _] =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2901
          if Prop_Logic.eval assignment fmTrue then
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2902
            SOME (print ctxt model T1 arg assignment)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2903
          else (* if Prop_Logic.eval assignment fmFalse then *)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2904
            NONE
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2905
        | _ =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2906
          raise REFUTE ("set_printer",
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2907
            "illegal interpretation for a Boolean value"))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2908
        (constants ~~ results)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2909
      val HOLogic_setT1     = HOLogic.mk_setT T1
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2910
      val HOLogic_empty_set = Const (@{const_abbrev Set.empty}, HOLogic_setT1)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2911
      val HOLogic_insert    =
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2912
        Const (@{const_name insert}, T1 --> HOLogic_setT1 --> HOLogic_setT1)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2913
    in
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2914
      SOME (Library.foldl (fn (acc, elem) => HOLogic_insert $ elem $ acc)
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2915
        (HOLogic_empty_set, elements))
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2916
    end
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2917
  | _ =>
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2918
    NONE);
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  2919
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2920
fun IDT_printer ctxt model T intr assignment =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2921
  let
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 42137
diff changeset
  2922
    val thy = Proof_Context.theory_of ctxt
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2923
  in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2924
    (case T of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2925
      Type (s, Ts) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2926
        (case Datatype.get_info thy s of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2927
          SOME info =>  (* inductive datatype *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2928
            let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2929
              val (typs, _)           = model
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2930
              val index               = #index info
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2931
              val descr               = #descr info
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2932
              val (_, dtyps, constrs) = the (AList.lookup (op =) descr index)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2933
              val typ_assoc           = dtyps ~~ Ts
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2934
              (* sanity check: every element in 'dtyps' must be a 'DtTFree' *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2935
              val _ =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2936
                if Library.exists (fn d =>
45896
100fb1f33e3e tuned signature;
wenzelm
parents: 45741
diff changeset
  2937
                  case d of Datatype.DtTFree _ => false | _ => true) dtyps
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2938
                then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2939
                  raise REFUTE ("IDT_printer", "datatype argument (for type " ^
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2940
                    Syntax.string_of_typ ctxt (Type (s, Ts)) ^ ") is not a variable")
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2941
                else ()
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2942
              (* the index of the element in the datatype *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2943
              val element =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2944
                (case intr of
41471
54a58904a598 modernized structure Prop_Logic;
wenzelm
parents: 40720
diff changeset
  2945
                  Leaf xs => find_index (Prop_Logic.eval assignment) xs
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2946
                | Node _  => raise REFUTE ("IDT_printer",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2947
                  "interpretation is not a leaf"))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2948
            in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2949
              if element < 0 then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2950
                SOME (Const (@{const_name undefined}, Type (s, Ts)))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2951
              else
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2952
                let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2953
                  (* takes a datatype constructor, and if for some arguments this  *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2954
                  (* constructor generates the datatype's element that is given by *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2955
                  (* 'element', returns the constructor (as a term) as well as the *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2956
                  (* indices of the arguments                                      *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2957
                  fun get_constr_args (cname, cargs) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2958
                    let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2959
                      val cTerm      = Const (cname,
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2960
                        map (typ_of_dtyp descr typ_assoc) cargs ---> Type (s, Ts))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2961
                      val (iC, _, _) = interpret ctxt (typs, []) {maxvars=0,
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2962
                        def_eq=false, next_idx=1, bounds=[], wellformed=True} cTerm
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2963
                      fun get_args (Leaf xs) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2964
                            if find_index (fn x => x = True) xs = element then
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2965
                              SOME []
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2966
                            else
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  2967
                              NONE
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2968
                        | get_args (Node xs) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2969
                            let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2970
                              fun search ([], _) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2971
                                NONE
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2972
                                | search (x::xs, n) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2973
                                (case get_args x of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2974
                                  SOME result => SOME (n::result)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2975
                                | NONE        => search (xs, n+1))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2976
                            in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2977
                              search (xs, 0)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2978
                            end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2979
                    in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2980
                      Option.map (fn args => (cTerm, cargs, args)) (get_args iC)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2981
                    end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2982
                  val (cTerm, cargs, args) =
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2983
                    (* we could speed things up by computing the correct          *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2984
                    (* constructor directly (rather than testing all              *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2985
                    (* constructors), based on the order in which constructors    *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2986
                    (* generate elements of datatypes; the current implementation *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2987
                    (* of 'IDT_printer' however is independent of the internals   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2988
                    (* of 'IDT_constructor_interpreter'                           *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2989
                    (case get_first get_constr_args constrs of
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2990
                      SOME x => x
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2991
                    | NONE   => raise REFUTE ("IDT_printer",
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2992
                      "no matching constructor found for element " ^
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2993
                      string_of_int element))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2994
                  val argsTerms = map (fn (d, n) =>
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2995
                    let
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2996
                      val dT = typ_of_dtyp descr typ_assoc d
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2997
                      (* we only need the n-th element of this list, so there   *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2998
                      (* might be a more efficient implementation that does not *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  2999
                      (* generate all constants                                 *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3000
                      val consts = make_constants ctxt (typs, []) dT
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3001
                    in
42364
8c674b3b8e44 eliminated old List.nth;
wenzelm
parents: 42361
diff changeset
  3002
                      print ctxt (typs, []) dT (nth consts n) assignment
39049
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3003
                    end) (cargs ~~ args)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3004
                in
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3005
                  SOME (list_comb (cTerm, argsTerms))
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3006
                end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3007
            end
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3008
        | NONE =>  (* not an inductive datatype *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3009
            NONE)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3010
    | _ =>  (* a (free or schematic) type variable *)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3011
        NONE)
423b72f2d242 prefer regular Proof.context over background theory;
wenzelm
parents: 39048
diff changeset
  3012
  end;
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3013
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3014
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3015
(* ------------------------------------------------------------------------- *)
14456
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  3016
(* use 'setup Refute.setup' in an Isabelle theory to initialize the 'Refute' *)
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  3017
(* structure                                                                 *)
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3018
(* ------------------------------------------------------------------------- *)
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3019
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3020
(* ------------------------------------------------------------------------- *)
14456
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  3021
(* Note: the interpreters and printers are used in reverse order; however,   *)
cca28ec5f9a6 support for non-recursive IDTs, The, arbitrary, Hilbert_Choice.Eps
webertj
parents: 14351
diff changeset
  3022
(*       an interpreter that can handle non-atomic terms ends up being       *)
14807
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  3023
(*       applied before the 'stlc_interpreter' breaks the term apart into    *)
e8ccb13d7774 major code change: refute can now handle any Isabelle term, adds certain axioms automatically, and can handle inductive datatypes (but not yet recursion over them)
webertj
parents: 14604
diff changeset
  3024
(*       subterms that are then passed to other interpreters!                *)
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3025
(* ------------------------------------------------------------------------- *)
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3026
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3027
val setup =
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3028
   add_interpreter "stlc"    stlc_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3029
   add_interpreter "Pure"    Pure_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3030
   add_interpreter "HOLogic" HOLogic_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3031
   add_interpreter "set"     set_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3032
   add_interpreter "IDT"             IDT_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3033
   add_interpreter "IDT_constructor" IDT_constructor_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3034
   add_interpreter "IDT_recursion"   IDT_recursion_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3035
   add_interpreter "Finite_Set.card"    Finite_Set_card_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3036
   add_interpreter "Finite_Set.finite"  Finite_Set_finite_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3037
   add_interpreter "Nat_Orderings.less" Nat_less_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3038
   add_interpreter "Nat_HOL.plus"       Nat_plus_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3039
   add_interpreter "Nat_HOL.minus"      Nat_minus_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3040
   add_interpreter "Nat_HOL.times"      Nat_times_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3041
   add_interpreter "List.append" List_append_interpreter #>
36130
9a672f7d488d commented out unsound "lfp"/"gfp" handling + fixed set output syntax;
blanchet
parents: 35746
diff changeset
  3042
(* UNSOUND
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3043
   add_interpreter "lfp" lfp_interpreter #>
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3044
   add_interpreter "gfp" gfp_interpreter #>
36130
9a672f7d488d commented out unsound "lfp"/"gfp" handling + fixed set output syntax;
blanchet
parents: 35746
diff changeset
  3045
*)
55411
27de2c976d90 repaired hard-coded constant names
blanchet
parents: 54757
diff changeset
  3046
   add_interpreter "Product_Type.prod.fst" Product_Type_fst_interpreter #>
27de2c976d90 repaired hard-coded constant names
blanchet
parents: 54757
diff changeset
  3047
   add_interpreter "Product_Type.prod.snd" Product_Type_snd_interpreter #>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3048
   add_printer "stlc" stlc_printer #>
46098
ce939621a1fe handle "set" correctly in Refute -- inspired by old code from Isabelle2007
blanchet
parents: 46096
diff changeset
  3049
   add_printer "set" set_printer #>
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3050
   add_printer "IDT"  IDT_printer;
14350
41b32020d0b3 Adding 'refute' to HOL.
webertj
parents:
diff changeset
  3051
39048
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3052
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3053
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3054
(** outer syntax commands 'refute' and 'refute_params' **)
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3055
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3056
(* argument parsing *)
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3057
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3058
(*optional list of arguments of the form [name1=value1, name2=value2, ...]*)
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3059
46949
94aa7b81bcf6 prefer formally checked @{keyword} parser;
wenzelm
parents: 46217
diff changeset
  3060
val scan_parm = Parse.name -- (Scan.optional (@{keyword "="} |-- Parse.name) "true")
94aa7b81bcf6 prefer formally checked @{keyword} parser;
wenzelm
parents: 46217
diff changeset
  3061
val scan_parms = Scan.optional (@{keyword "["} |-- Parse.list scan_parm --| @{keyword "]"}) [];
39048
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3062
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3063
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3064
(* 'refute' command *)
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3065
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3066
val _ =
46961
5c6955f487e5 outer syntax command definitions based on formal command_spec derived from theory header declarations;
wenzelm
parents: 46960
diff changeset
  3067
  Outer_Syntax.improper_command @{command_spec "refute"}
5c6955f487e5 outer syntax command definitions based on formal command_spec derived from theory header declarations;
wenzelm
parents: 46960
diff changeset
  3068
    "try to find a model that refutes a given subgoal"
39048
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3069
    (scan_parms -- Scan.optional Parse.nat 1 >>
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3070
      (fn (parms, i) =>
51557
4e4b56b7a3a5 more robust access Toplevel.proof_of -- prefer warning via Toplevel.unknown_proof over hard crash (notably for skipped proofs);
wenzelm
parents: 50530
diff changeset
  3071
        Toplevel.unknown_proof o
39048
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3072
        Toplevel.keep (fn state =>
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3073
          let
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3074
            val ctxt = Toplevel.context_of state;
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3075
            val {goal = st, ...} = Proof.raw_goal (Toplevel.proof_of state);
45387
ccffb3f9f42b return outcome code, so that it can be picked up by Mutabelle
blanchet
parents: 44121
diff changeset
  3076
          in refute_goal ctxt parms st i; () end)));
39048
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3077
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3078
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3079
(* 'refute_params' command *)
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3080
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3081
val _ =
46961
5c6955f487e5 outer syntax command definitions based on formal command_spec derived from theory header declarations;
wenzelm
parents: 46960
diff changeset
  3082
  Outer_Syntax.command @{command_spec "refute_params"}
5c6955f487e5 outer syntax command definitions based on formal command_spec derived from theory header declarations;
wenzelm
parents: 46960
diff changeset
  3083
    "show/store default parameters for the 'refute' command"
39048
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3084
    (scan_parms >> (fn parms =>
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3085
      Toplevel.theory (fn thy =>
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3086
        let
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3087
          val thy' = fold set_default_param parms thy;
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3088
          val output =
42361
23f352990944 modernized structure Proof_Context;
wenzelm
parents: 42137
diff changeset
  3089
            (case get_default_params (Proof_Context.init_global thy') of
39048
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3090
              [] => "none"
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3091
            | new_defaults => cat_lines (map (fn (x, y) => x ^ "=" ^ y) new_defaults));
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3092
          val _ = writeln ("Default parameters for 'refute':\n" ^ output);
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3093
        in thy' end)));
4006f5c3f421 just one refute.ML;
wenzelm
parents: 39047
diff changeset
  3094
39046
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3095
end;
5b38730f3e12 tuned whitespace and indentation, emphasizing the logical structure of this long text;
wenzelm
parents: 38864
diff changeset
  3096