src/HOL/Tools/res_clause.ML
author paulson
Wed Jul 05 16:24:28 2006 +0200 (2006-07-05)
changeset 20018 5419a71d0baa
parent 20015 1ffcf4802802
child 20022 b07a138b4e7d
permissions -rw-r--r--
removed the "tagging" feature
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(*  Author: Jia Meng, Cambridge University Computer Laboratory
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    ID: $Id$
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    Copyright 2004 University of Cambridge
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ML data structure for storing/printing FOL clauses and arity clauses.
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Typed equality is treated differently.
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*)
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signature RES_CLAUSE =
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  sig
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  exception CLAUSE of string * term
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  type clause and arityClause and classrelClause
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  type fol_type
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  type typ_var
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  type type_literal
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  val add_typs_aux : (typ_var * string list) list -> type_literal list * type_literal list
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  val arity_clause_thy: theory -> arityClause list 
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  val ascii_of : string -> string
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  val bracket_pack : string list -> string
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  val classrel_clauses_thy: theory -> classrelClause list 
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  val clause_prefix : string 
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  val clause2tptp : clause -> string * string list
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  val const_prefix : string
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  val dfg_write_file:  thm list -> string -> ((thm * (string * int)) list * classrelClause list * arityClause list) -> unit
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  val fixed_var_prefix : string
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  val gen_tptp_cls : int * string * string * string -> string
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  val gen_tptp_type_cls : int * string * string * string * int -> string
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  val get_axiomName : clause ->  string
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  val init : theory -> unit
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  val isMeta : string -> bool
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  val isTaut : clause -> bool
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  val keep_types : bool ref
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  val list_ord : ('a * 'b -> order) -> 'a list * 'b list -> order
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  val make_axiom_clause : thm -> string * int -> clause option
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  val make_conjecture_clauses : thm list -> clause list
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  val make_fixed_const : string -> string		
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  val make_fixed_type_const : string -> string   
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  val make_fixed_type_var : string -> string
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  val make_fixed_var : string -> string
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  val make_schematic_type_var : string * int -> string
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  val make_schematic_var : string * int -> string
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  val make_type_class : string -> string
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  val mk_fol_type: string * string * fol_type list -> fol_type
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  val mk_typ_var_sort : Term.typ -> typ_var * sort
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  val paren_pack : string list -> string
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  val schematic_var_prefix : string
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  val special_equal : bool ref
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  val string_of_fol_type : fol_type -> string
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  val tconst_prefix : string 
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  val tfree_prefix : string
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  val tptp_arity_clause : arityClause -> string
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  val tptp_classrelClause : classrelClause -> string
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  val tptp_of_typeLit : type_literal -> string
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  val tptp_tfree_clause : string -> string
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  val tptp_write_file: thm list -> string -> ((thm * (string * int)) list * classrelClause list * arityClause list) -> unit
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  val tvar_prefix : string
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  val union_all : ''a list list -> ''a list
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  val writeln_strs: TextIO.outstream -> TextIO.vector list -> unit
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  val dfg_sign: bool -> string -> string
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  val dfg_of_typeLit: type_literal -> string
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  val get_tvar_strs: (typ_var * sort) list -> string list
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  val gen_dfg_cls: int * string * string * string * string list -> string
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  val add_foltype_funcs: fol_type * int Symtab.table -> int Symtab.table
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  val add_arityClause_funcs: arityClause * int Symtab.table -> int Symtab.table
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  val add_arityClause_preds: arityClause * int Symtab.table -> int Symtab.table
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  val add_classrelClause_preds : classrelClause * int Symtab.table -> int Symtab.table
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  val dfg_tfree_clause : string -> string
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  val string_of_start: string -> string
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  val string_of_descrip : string -> string
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  val string_of_symbols: string -> string -> string
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  val string_of_funcs: (string * int) list -> string
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  val string_of_preds: (string * Int.int) list -> string
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  val dfg_classrelClause: classrelClause -> string
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  val dfg_arity_clause: arityClause -> string
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end;
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structure ResClause : RES_CLAUSE =
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struct
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(* Added for typed equality *)
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val special_equal = ref false; (* by default,equality does not carry type information *)
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val eq_typ_wrapper = "typeinfo"; (* default string *)
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val schematic_var_prefix = "V_";
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val fixed_var_prefix = "v_";
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val tvar_prefix = "T_";
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val tfree_prefix = "t_";
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val clause_prefix = "cls_"; 
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val arclause_prefix = "clsarity_" 
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val clrelclause_prefix = "clsrel_";
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val const_prefix = "c_";
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val tconst_prefix = "tc_"; 
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val class_prefix = "class_"; 
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fun union_all xss = foldl (op union) [] xss;
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(*Provide readable names for the more common symbolic functions*)
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val const_trans_table =
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      Symtab.make [("op =", "equal"),
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	  	   ("Orderings.less_eq", "lessequals"),
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		   ("Orderings.less", "less"),
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		   ("op &", "and"),
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		   ("op |", "or"),
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		   ("HOL.plus", "plus"),
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		   ("HOL.minus", "minus"),
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		   ("HOL.times", "times"),
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		   ("Divides.op div", "div"),
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		   ("HOL.divide", "divide"),
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		   ("op -->", "implies"),
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		   ("{}", "emptyset"),
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		   ("op :", "in"),
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		   ("op Un", "union"),
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		   ("op Int", "inter"),
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		   ("List.op @", "append")];
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val type_const_trans_table =
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      Symtab.make [("*", "prod"),
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	  	   ("+", "sum"),
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		   ("~=>", "map")];
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(*Escaping of special characters.
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  Alphanumeric characters are left unchanged.
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  The character _ goes to __
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  Characters in the range ASCII space to / go to _A to _P, respectively.
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  Other printing characters go to _NNN where NNN is the decimal ASCII code.*)
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local
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val A_minus_space = Char.ord #"A" - Char.ord #" ";
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fun ascii_of_c c =
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  if Char.isAlphaNum c then String.str c
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  else if c = #"_" then "__"
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  else if #" " <= c andalso c <= #"/" 
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       then "_" ^ String.str (Char.chr (Char.ord c + A_minus_space))
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  else if Char.isPrint c then ("_" ^ Int.toString (Char.ord c))
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  else ""
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in
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val ascii_of = String.translate ascii_of_c;
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end;
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(* convert a list of strings into one single string; surrounded by brackets *)
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fun paren_pack [] = ""   (*empty argument list*)
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  | paren_pack strings = "(" ^ commas strings ^ ")";
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fun bracket_pack strings = "[" ^ commas strings ^ "]";
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(*Remove the initial ' character from a type variable, if it is present*)
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fun trim_type_var s =
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  if s <> "" andalso String.sub(s,0) = #"'" then String.extract(s,1,NONE)
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  else error ("trim_type: Malformed type variable encountered: " ^ s);
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fun ascii_of_indexname (v,0) = ascii_of v
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  | ascii_of_indexname (v,i) = ascii_of v ^ "_" ^ Int.toString i;
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fun make_schematic_var v = schematic_var_prefix ^ (ascii_of_indexname v);
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fun make_fixed_var x = fixed_var_prefix ^ (ascii_of x);
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fun make_schematic_type_var (x,i) = 
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      tvar_prefix ^ (ascii_of_indexname (trim_type_var x,i));
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fun make_fixed_type_var x = tfree_prefix ^ (ascii_of (trim_type_var x));
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fun lookup_const c =
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    case Symtab.lookup const_trans_table c of
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        SOME c' => c'
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      | NONE => ascii_of c;
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fun lookup_type_const c = 
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    case Symtab.lookup type_const_trans_table c of
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        SOME c' => c'
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      | NONE => ascii_of c;
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fun make_fixed_const "op =" = "equal"   (*MUST BE "equal" because it's built-in to ATPs*)
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  | make_fixed_const c      = const_prefix ^ lookup_const c;
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fun make_fixed_type_const c = tconst_prefix ^ lookup_type_const c;
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fun make_type_class clas = class_prefix ^ ascii_of clas;
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(***** definitions and functions for FOL clauses, for conversion to TPTP or DFG format. *****)
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val keep_types = ref true;
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datatype kind = Axiom | Hypothesis | Conjecture;
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fun name_of_kind Axiom = "axiom"
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  | name_of_kind Hypothesis = "hypothesis"
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  | name_of_kind Conjecture = "conjecture";
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type clause_id = int;
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type axiom_name = string;
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type polarity = bool;
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(**** Isabelle FOL clauses ****)
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type pred_name = string;
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datatype typ_var = FOLTVar of indexname | FOLTFree of string;
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(*FIXME: give the constructors more sensible names*)
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datatype fol_type = AtomV of string
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		  | AtomF of string
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		  | Comp of string * fol_type list;
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fun string_of_fol_type (AtomV x) = x
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  | string_of_fol_type (AtomF x) = x
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  | string_of_fol_type (Comp(tcon,tps)) = 
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      tcon ^ (paren_pack (map string_of_fol_type tps));
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fun mk_fol_type ("Var",x,_) = AtomV(x)
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  | mk_fol_type ("Fixed",x,_) = AtomF(x)
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  | mk_fol_type ("Comp",con,args) = Comp(con,args)
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(*First string is the type class; the second is a TVar or TFfree*)
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datatype type_literal = LTVar of string * string | LTFree of string * string;
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datatype fol_term = UVar of string * fol_type
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                 | Fun of string * fol_type list * fol_term list;
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datatype predicate = Predicate of pred_name * fol_type list * fol_term list;
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datatype literal = Literal of polarity * predicate;
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fun mk_typ_var_sort (TFree(a,s)) = (FOLTFree a,s)
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  | mk_typ_var_sort (TVar(v,s)) = (FOLTVar v,s);
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(*A clause has first-order literals and other, type-related literals*)
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datatype clause = 
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	 Clause of {clause_id: clause_id,
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		    axiom_name: axiom_name,
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		    th: thm,
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		    kind: kind,
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		    literals: literal list,
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		    types_sorts: (typ_var * sort) list};
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fun get_axiomName (Clause cls) = #axiom_name cls;
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exception CLAUSE of string * term;
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fun isFalse (Literal (pol, Predicate(pname,_,[]))) =
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      (pol andalso pname = "c_False") orelse
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      (not pol andalso pname = "c_True")
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  | isFalse _ = false;
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fun isTrue (Literal (pol, Predicate(pname,_,[]))) =
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      (pol andalso pname = "c_True") orelse
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      (not pol andalso pname = "c_False")
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  | isTrue _ = false;
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fun isTaut (Clause {literals,...}) = exists isTrue literals;  
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(*Declarations of the current theory--to allow suppressing types.*)
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val const_typargs = ref (Library.K [] : (string*typ -> typ list));
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fun num_typargs(s,T) = if !keep_types then length (!const_typargs (s,T)) else 0;
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(*Initialize the type suppression mechanism with the current theory before
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    producing any clauses!*)
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fun init thy = (const_typargs := Sign.const_typargs thy);
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(*Flatten a type to a fol_type while accumulating sort constraints on the TFrees and
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  TVars it contains.*)    
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fun type_of (Type (a, Ts)) = 
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      let val (folTyps, ts) = types_of Ts 
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	  val t = make_fixed_type_const a
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      in (Comp(t,folTyps), ts) end
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  | type_of (TFree (a,s)) = (AtomF(make_fixed_type_var a), [(FOLTFree a, s)]) 
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  | type_of (TVar (v, s)) = (AtomV(make_schematic_type_var v), [(FOLTVar v, s)])
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and types_of Ts =
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      let val (folTyps,ts) = ListPair.unzip (map type_of Ts)
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      in (folTyps, union_all ts) end;
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fun const_types_of (c,T) = types_of (!const_typargs (c,T));
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(* Any variables created via the METAHYPS tactical should be treated as
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   universal vars, although it is represented as "Free(...)" by Isabelle *)
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val isMeta = String.isPrefix "METAHYP1_"
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fun pred_name_type (Const(c,T)) = (make_fixed_const c, const_types_of (c,T))
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  | pred_name_type (Free(x,T))  = 
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      if isMeta x then raise CLAUSE("Predicate Not First Order 1", Free(x,T)) 
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      else (make_fixed_var x, ([],[]))
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  | pred_name_type (v as Var _) = raise CLAUSE("Predicate Not First Order 2", v)
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  | pred_name_type t        = raise CLAUSE("Predicate input unexpected", t);
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(* For typed equality *)
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(* here "arg_typ" is the type of "="'s argument's type, not the type of the equality *)
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(* Find type of equality arg *)
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fun eq_arg_type (Type("fun",[T,_])) = 
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    let val (folT,_) = type_of T;
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    in  folT  end;
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fun fun_name_type (Const(c,T)) args = (make_fixed_const c, const_types_of (c,T))
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  | fun_name_type (Free(x,T)) args  = 
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       if isMeta x then raise CLAUSE("Function Not First Order", Free(x,T))
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       else (make_fixed_var x, ([],[]))
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  | fun_name_type f args = raise CLAUSE("Function Not First Order 1", f);
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(*Convert a term to a fol_term while accumulating sort constraints on the TFrees and
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  TVars it contains.*)    
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fun term_of (Var(ind_nm,T)) = 
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      let val (folType,ts) = type_of T
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      in (UVar(make_schematic_var ind_nm, folType), ts) end
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  | term_of (Free(x,T)) = 
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      let val (folType, ts) = type_of T
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      in
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	  if isMeta x then (UVar(make_schematic_var(x,0),folType), ts)
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	  else (Fun(make_fixed_var x, [folType], []), ts)
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      end
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  | term_of app = 
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      let val (f,args) = strip_comb app
paulson@18798
   324
	  val (funName,(contys,ts1)) = fun_name_type f args
paulson@18798
   325
	  val (args',ts2) = terms_of args
paulson@17230
   326
      in
paulson@18868
   327
	  (Fun(funName,contys,args'), union_all (ts1::ts2))
paulson@17230
   328
      end
paulson@18798
   329
and terms_of ts = ListPair.unzip (map term_of ts)
paulson@15390
   330
paulson@18856
   331
(*Create a predicate value, again accumulating sort constraints.*)    
paulson@17404
   332
fun pred_of (Const("op =", typ), args) =
paulson@17404
   333
      let val arg_typ = eq_arg_type typ 
paulson@18798
   334
	  val (args',ts) = terms_of args
paulson@17404
   335
	  val equal_name = make_fixed_const "op ="
paulson@17404
   336
      in
paulson@18218
   337
	  (Predicate(equal_name,[arg_typ],args'),
paulson@18856
   338
	   union_all ts)
paulson@17404
   339
      end
paulson@17404
   340
  | pred_of (pred,args) = 
paulson@18856
   341
      let val (pname, (predType,ts1)) = pred_name_type pred
paulson@18798
   342
	  val (args',ts2) = terms_of args
paulson@17404
   343
      in
paulson@18856
   344
	  (Predicate(pname,predType,args'), union_all (ts1::ts2))
paulson@17404
   345
      end;
paulson@15347
   346
paulson@20018
   347
(*Treatment of literals, possibly negated*)
paulson@20018
   348
fun predicate_of ((Const("Not",_) $ P), polarity) = predicate_of (P, not polarity)
paulson@20018
   349
  | predicate_of (term,polarity) = (pred_of (strip_comb term), polarity);
paulson@15347
   350
paulson@17888
   351
fun literals_of_term1 args (Const("Trueprop",_) $ P) = literals_of_term1 args P
paulson@18856
   352
  | literals_of_term1 args (Const("op |",_) $ P $ Q) = 
paulson@18856
   353
      literals_of_term1 (literals_of_term1 args P) Q
paulson@18856
   354
  | literals_of_term1 (lits, ts) P =
paulson@20018
   355
      let val ((pred, ts'), polarity) = predicate_of (P,true)
paulson@20018
   356
	  val lits' = Literal(polarity,pred) :: lits
paulson@17234
   357
      in
paulson@18856
   358
	  (lits', ts union ts')
paulson@17234
   359
      end;
quigley@17150
   360
paulson@18856
   361
val literals_of_term = literals_of_term1 ([],[]);
quigley@17150
   362
mengj@18403
   363
mengj@18403
   364
fun list_ord _ ([],[]) = EQUAL
mengj@18403
   365
  | list_ord _ ([],_) = LESS
mengj@18403
   366
  | list_ord _ (_,[]) = GREATER
paulson@19207
   367
  | list_ord ord (x::xs, y::ys) = 
paulson@19207
   368
      (case ord(x,y) of EQUAL => list_ord ord (xs,ys)
paulson@19207
   369
	 	      | xy_ord => xy_ord);
paulson@19207
   370
		     
paulson@18798
   371
(*Make literals for sorted type variables.  FIXME: can it use map?*) 
quigley@17150
   372
fun sorts_on_typs (_, [])   = ([]) 
paulson@16199
   373
  | sorts_on_typs (v, "HOL.type" :: s) =
paulson@18411
   374
      sorts_on_typs (v,s)                (*IGNORE sort "type"*)
paulson@18798
   375
  | sorts_on_typs ((FOLTVar indx), s::ss) =
paulson@18798
   376
      LTVar(make_type_class s, make_schematic_type_var indx) :: 
paulson@18798
   377
      sorts_on_typs ((FOLTVar indx), ss)
paulson@18798
   378
  | sorts_on_typs ((FOLTFree x), s::ss) =
paulson@18798
   379
      LTFree(make_type_class s, make_fixed_type_var x) :: 
paulson@18798
   380
      sorts_on_typs ((FOLTFree x), ss);
paulson@15347
   381
quigley@17150
   382
paulson@18798
   383
fun pred_of_sort (LTVar (s,ty)) = (s,1)
paulson@18798
   384
|   pred_of_sort (LTFree (s,ty)) = (s,1)
quigley@17150
   385
paulson@16199
   386
(*Given a list of sorted type variables, return two separate lists.
paulson@16199
   387
  The first is for TVars, the second for TFrees.*)
paulson@18856
   388
fun add_typs_aux [] = ([],[])
paulson@18856
   389
  | add_typs_aux ((FOLTVar indx,s)::tss) = 
paulson@17230
   390
      let val vs = sorts_on_typs (FOLTVar indx, s)
paulson@18856
   391
	  val (vss,fss) = add_typs_aux tss
quigley@17150
   392
      in
paulson@18856
   393
	  (vs union vss, fss)
quigley@17150
   394
      end
paulson@18856
   395
  | add_typs_aux ((FOLTFree x,s)::tss) =
paulson@17230
   396
      let val fs = sorts_on_typs (FOLTFree x, s)
paulson@18856
   397
	  val (vss,fss) = add_typs_aux tss
quigley@17150
   398
      in
paulson@18856
   399
	  (vss, fs union fss)
quigley@17150
   400
      end;
quigley@17150
   401
paulson@18920
   402
(** Too general means, positive equality literal with a variable X as one operand,
paulson@18920
   403
  when X does not occur properly in the other operand. This rules out clearly
paulson@18920
   404
  inconsistent clauses such as V=a|V=b, though it by no means guarantees soundness. **)
paulson@18920
   405
paulson@18920
   406
fun occurs a (UVar(b,_)) = a=b
paulson@18920
   407
  | occurs a (Fun (_,_,ts)) = exists (occurs a) ts
paulson@18920
   408
paulson@18920
   409
(*Is the first operand a variable that does not properly occur in the second operand?*)
paulson@18920
   410
fun too_general_terms (UVar _, UVar _) = false
paulson@18920
   411
  | too_general_terms (Fun _, _) = false
paulson@18920
   412
  | too_general_terms (UVar (a,_), t) = not (occurs a t);
paulson@18920
   413
paulson@20018
   414
fun too_general_lit (Literal (true, Predicate("equal",_,[x,y]))) =
paulson@18920
   415
      too_general_terms (x,y) orelse too_general_terms(y,x)
paulson@18920
   416
  | too_general_lit _ = false;
quigley@17150
   417
mengj@20015
   418
mengj@20015
   419
mengj@20015
   420
(** make axiom and conjecture clauses. **)
mengj@20015
   421
mengj@20015
   422
exception MAKE_CLAUSE;
mengj@20015
   423
fun make_clause (clause_id, axiom_name, th, kind) =
paulson@20018
   424
  let val term = prop_of th
paulson@20018
   425
      val (lits,types_sorts) = literals_of_term term
paulson@20018
   426
  in if forall isFalse lits 
paulson@20018
   427
     then error "Problem too trivial for resolution (empty clause)"
paulson@20018
   428
     else if kind=Axiom andalso forall too_general_lit lits 
paulson@20018
   429
     then (Output.debug ("Omitting " ^ axiom_name ^ ": equalities are too general"); 
paulson@20018
   430
           raise MAKE_CLAUSE)
paulson@20018
   431
     else Clause {clause_id = clause_id, axiom_name = axiom_name, th = th, 
paulson@20018
   432
                  kind = kind, literals = lits, types_sorts = types_sorts}
paulson@20018
   433
  end;		     
mengj@20015
   434
mengj@20015
   435
fun get_tvar_strs [] = []
mengj@20015
   436
  | get_tvar_strs ((FOLTVar indx,s)::tss) = 
mengj@20015
   437
      (make_schematic_type_var indx) ins (get_tvar_strs tss)
mengj@20015
   438
  | get_tvar_strs((FOLTFree x,s)::tss) = get_tvar_strs tss
mengj@20015
   439
mengj@20015
   440
(* check if a clause is first-order before making a conjecture clause*)
mengj@20015
   441
fun make_conjecture_clause n thm =
mengj@20015
   442
    let val t = prop_of thm
mengj@20015
   443
	val _ = check_is_fol_term t
mengj@20015
   444
	    handle TERM("check_is_fol_term",_) => raise CLAUSE("Goal is not FOL",t)
mengj@20015
   445
    in
mengj@20015
   446
	make_clause(n, "conjecture", thm, Conjecture)
mengj@20015
   447
    end;
mengj@20015
   448
    
mengj@20015
   449
fun make_conjecture_clauses_aux _ [] = []
mengj@20015
   450
  | make_conjecture_clauses_aux n (t::ts) =
mengj@20015
   451
      make_conjecture_clause n t :: make_conjecture_clauses_aux (n+1) ts
mengj@20015
   452
mengj@20015
   453
val make_conjecture_clauses = make_conjecture_clauses_aux 0
mengj@20015
   454
mengj@20015
   455
mengj@20015
   456
mengj@18199
   457
(*before converting an axiom clause to "clause" format, check if it is FOL*)
mengj@19443
   458
fun make_axiom_clause thm (ax_name,cls_id) =
mengj@19443
   459
    let val term = prop_of thm
paulson@15347
   460
    in 
paulson@19207
   461
	if not (Meson.is_fol_term term) then
mengj@20015
   462
	    (Output.debug ("Omitting " ^ ax_name ^ ": Axiom is not FOL"); 
mengj@20015
   463
	     NONE)
mengj@20015
   464
	else (SOME (make_clause(cls_id, ax_name, thm, Axiom)) handle MAKE_CLAUSE => NONE)
paulson@19207
   465
    end
mengj@20015
   466
	handle CLAUSE _ => NONE;
mengj@20015
   467
    
mengj@19443
   468
fun make_axiom_clauses [] = []
mengj@19443
   469
  | make_axiom_clauses ((thm,(name,id))::thms) =
mengj@19443
   470
    case make_axiom_clause thm (name,id) of SOME cls => if isTaut cls then make_axiom_clauses thms else cls :: make_axiom_clauses thms
mengj@19443
   471
						    | NONE => make_axiom_clauses thms;
mengj@19354
   472
paulson@15347
   473
(**** Isabelle arities ****)
paulson@15347
   474
paulson@15347
   475
exception ARCLAUSE of string;
paulson@15347
   476
 
paulson@15347
   477
type class = string; 
paulson@15347
   478
type tcons = string; 
paulson@15347
   479
paulson@18868
   480
datatype arLit = TConsLit of bool * (class * tcons * string list)
paulson@18868
   481
               | TVarLit of bool * (class * string);
paulson@15347
   482
 
paulson@15347
   483
datatype arityClause =  
paulson@15347
   484
	 ArityClause of {clause_id: clause_id,
paulson@17845
   485
	  	         axiom_name: axiom_name,
paulson@15347
   486
			 kind: kind,
paulson@15347
   487
			 conclLit: arLit,
paulson@15347
   488
			 premLits: arLit list};
paulson@15347
   489
paulson@15347
   490
paulson@18798
   491
fun gen_TVars 0 = []
paulson@18798
   492
  | gen_TVars n = ("T_" ^ Int.toString n) :: gen_TVars (n-1);
paulson@15347
   493
paulson@18411
   494
fun pack_sort(_,[])  = []
paulson@18411
   495
  | pack_sort(tvar, "HOL.type"::srt) = pack_sort(tvar, srt)   (*IGNORE sort "type"*)
paulson@18411
   496
  | pack_sort(tvar, cls::srt) =  (make_type_class cls, tvar) :: pack_sort(tvar, srt);
paulson@15347
   497
    
paulson@18868
   498
fun make_TVarLit (b, (cls,str)) = TVarLit(b, (cls,str));
paulson@18868
   499
fun make_TConsLit (b, (cls,tcons,tvars)) = 
paulson@18868
   500
      TConsLit(b, (make_type_class cls, make_fixed_type_const tcons, tvars));
paulson@15347
   501
paulson@18411
   502
(*Arity of type constructor tcon :: (arg1,...,argN)res*)
paulson@18411
   503
fun make_axiom_arity_clause (tcons, n, (res,args)) =
paulson@17845
   504
   let val nargs = length args
paulson@18798
   505
       val tvars = gen_TVars nargs
paulson@17845
   506
       val tvars_srts = ListPair.zip (tvars,args)
paulson@17845
   507
       val tvars_srts' = union_all(map pack_sort tvars_srts)
paulson@17845
   508
       val false_tvars_srts' = map (pair false) tvars_srts'
paulson@17845
   509
   in
paulson@17845
   510
      ArityClause {clause_id = n, kind = Axiom, 
paulson@18411
   511
                   axiom_name = lookup_type_const tcons,
paulson@18411
   512
                   conclLit = make_TConsLit(true, (res,tcons,tvars)), 
paulson@17845
   513
                   premLits = map make_TVarLit false_tvars_srts'}
paulson@17845
   514
   end;
paulson@15347
   515
paulson@15347
   516
paulson@15347
   517
(**** Isabelle class relations ****)
paulson@15347
   518
paulson@15347
   519
datatype classrelClause = 
paulson@18868
   520
	 ClassrelClause of {axiom_name: axiom_name,
paulson@15347
   521
			    subclass: class,
paulson@18411
   522
			    superclass: class};
paulson@17845
   523
paulson@17845
   524
fun make_axiom_classrelClause n subclass superclass =
paulson@18868
   525
  ClassrelClause {axiom_name = clrelclause_prefix ^ ascii_of subclass ^ 
paulson@18868
   526
                                "_" ^ Int.toString n,
paulson@18868
   527
                  subclass = make_type_class subclass, 
paulson@18868
   528
                  superclass = make_type_class superclass};
paulson@15347
   529
paulson@17845
   530
fun classrelClauses_of_aux n sub [] = []
paulson@18411
   531
  | classrelClauses_of_aux n sub ("HOL.type"::sups) = (*Should be ignored*)
paulson@18411
   532
      classrelClauses_of_aux n sub sups
paulson@17845
   533
  | classrelClauses_of_aux n sub (sup::sups) =
paulson@18868
   534
      make_axiom_classrelClause n sub sup :: classrelClauses_of_aux (n+1) sub sups;
paulson@15347
   535
paulson@18411
   536
fun classrelClauses_of (sub,sups) = classrelClauses_of_aux 0 sub sups;
paulson@17845
   537
wenzelm@19642
   538
val classrel_clauses_thy =
wenzelm@19642
   539
  maps classrelClauses_of o Graph.dest o #classes o Sorts.rep_algebra o Sign.classes_of;
paulson@18868
   540
paulson@18868
   541
paulson@18868
   542
(** Isabelle arities **)
paulson@17845
   543
paulson@17845
   544
fun arity_clause _ (tcons, []) = []
paulson@19155
   545
  | arity_clause n (tcons, ("HOL.type",_)::ars) =  (*ignore*)
paulson@18411
   546
      arity_clause n (tcons,ars)
paulson@17845
   547
  | arity_clause n (tcons, ar::ars) =
paulson@17845
   548
      make_axiom_arity_clause (tcons,n,ar) :: 
paulson@17845
   549
      arity_clause (n+1) (tcons,ars);
paulson@17845
   550
paulson@17845
   551
fun multi_arity_clause [] = []
paulson@19155
   552
  | multi_arity_clause ((tcons,ars) :: tc_arlists) =
paulson@19155
   553
      (*Reversal ensures that older entries always get the same axiom name*)
paulson@19155
   554
      arity_clause 0 (tcons, rev ars)  @  
paulson@19155
   555
      multi_arity_clause tc_arlists 
paulson@17845
   556
paulson@17845
   557
fun arity_clause_thy thy =
wenzelm@19642
   558
  let val arities = thy |> Sign.classes_of
wenzelm@19642
   559
    |> Sorts.rep_algebra |> #arities |> Symtab.dest
wenzelm@19642
   560
    |> map (apsnd (map (fn (c, (_, Ss)) => (c, Ss))));
wenzelm@19521
   561
  in multi_arity_clause (rev arities) end;
paulson@17845
   562
paulson@17845
   563
paulson@18868
   564
(**** Find occurrences of predicates in clauses ****)
paulson@18868
   565
paulson@18868
   566
(*FIXME: multiple-arity checking doesn't work, as update_new is the wrong 
paulson@18868
   567
  function (it flags repeated declarations of a function, even with the same arity)*)
paulson@18868
   568
paulson@18868
   569
fun update_many (tab, keypairs) = foldl (uncurry Symtab.update) tab keypairs;
paulson@18868
   570
paulson@18868
   571
fun add_predicate_preds (Predicate(pname,tys,tms), preds) = 
paulson@18868
   572
  if pname = "equal" then preds (*equality is built-in and requires no declaration*)
paulson@18868
   573
  else Symtab.update (pname, length tys + length tms) preds
paulson@18868
   574
paulson@20018
   575
fun add_literal_preds (Literal(_,pred), preds) = add_predicate_preds (pred,preds)
paulson@18868
   576
paulson@18868
   577
fun add_type_sort_preds ((FOLTVar indx,s), preds) = 
paulson@18868
   578
      update_many (preds, map pred_of_sort (sorts_on_typs (FOLTVar indx, s)))
paulson@18868
   579
  | add_type_sort_preds ((FOLTFree x,s), preds) =
paulson@18868
   580
      update_many (preds, map pred_of_sort (sorts_on_typs (FOLTFree x, s)));
paulson@17845
   581
paulson@18868
   582
fun add_clause_preds (Clause {literals, types_sorts, ...}, preds) =
paulson@18868
   583
  foldl add_literal_preds (foldl add_type_sort_preds preds types_sorts) literals
paulson@18868
   584
  handle Symtab.DUP a => raise ERROR ("predicate " ^ a ^ " has multiple arities")
paulson@18868
   585
paulson@18868
   586
fun add_classrelClause_preds (ClassrelClause {subclass,superclass,...}, preds) =
paulson@18868
   587
  Symtab.update (subclass,1) (Symtab.update (superclass,1) preds);
paulson@17845
   588
paulson@18868
   589
fun add_arityClause_preds (ArityClause {conclLit,...}, preds) =
paulson@18868
   590
  let val TConsLit(_, (tclass, _, _)) = conclLit
paulson@18868
   591
  in  Symtab.update (tclass,1) preds  end;
paulson@18868
   592
paulson@18868
   593
fun preds_of_clauses clauses clsrel_clauses arity_clauses = 
paulson@18868
   594
  Symtab.dest
paulson@18868
   595
    (foldl add_classrelClause_preds 
paulson@18868
   596
      (foldl add_arityClause_preds
paulson@18868
   597
        (foldl add_clause_preds Symtab.empty clauses)
paulson@18868
   598
        arity_clauses)
paulson@18868
   599
      clsrel_clauses)
paulson@18798
   600
paulson@18868
   601
(*** Find occurrences of functions in clauses ***)
paulson@18868
   602
paulson@18868
   603
fun add_foltype_funcs (AtomV _, funcs) = funcs
paulson@18868
   604
  | add_foltype_funcs (AtomF a, funcs) = Symtab.update (a,0) funcs
paulson@18868
   605
  | add_foltype_funcs (Comp(a,tys), funcs) = 
paulson@18868
   606
      foldl add_foltype_funcs (Symtab.update (a, length tys) funcs) tys;
paulson@18868
   607
paulson@18868
   608
fun add_folterm_funcs (UVar _, funcs) = funcs
mengj@20015
   609
  | add_folterm_funcs (Fun(a,tys,[]), funcs) = Symtab.update (a,length tys) funcs
paulson@18868
   610
  | add_folterm_funcs (Fun(a,tys,tms), funcs) = 
paulson@18868
   611
      foldl add_foltype_funcs 
paulson@18868
   612
	    (foldl add_folterm_funcs (Symtab.update (a, length tys + length tms) funcs) 
paulson@18868
   613
	           tms) 
paulson@18868
   614
	    tys
paulson@18798
   615
paulson@18868
   616
fun add_predicate_funcs (Predicate(_,tys,tms), funcs) = 
paulson@18868
   617
    foldl add_foltype_funcs (foldl add_folterm_funcs funcs tms) tys;
paulson@18868
   618
paulson@20018
   619
fun add_literal_funcs (Literal(_,pred), funcs) = add_predicate_funcs (pred,funcs)
paulson@18868
   620
paulson@18868
   621
fun add_arityClause_funcs (ArityClause {conclLit,...}, funcs) =
paulson@18868
   622
  let val TConsLit(_, (_, tcons, tvars)) = conclLit
paulson@18868
   623
  in  Symtab.update (tcons, length tvars) funcs  end;
paulson@17845
   624
paulson@18868
   625
fun add_clause_funcs (Clause {literals, ...}, funcs) =
paulson@18868
   626
  foldl add_literal_funcs funcs literals
paulson@18868
   627
  handle Symtab.DUP a => raise ERROR ("function " ^ a ^ " has multiple arities")
paulson@18868
   628
paulson@18868
   629
fun funcs_of_clauses clauses arity_clauses = 
paulson@18868
   630
  Symtab.dest (foldl add_arityClause_funcs 
paulson@18868
   631
                     (foldl add_clause_funcs Symtab.empty clauses)
paulson@18868
   632
                     arity_clauses)
paulson@18868
   633
paulson@18868
   634
paulson@18868
   635
(**** String-oriented operations ****)
paulson@15347
   636
paulson@15347
   637
fun wrap_eq_type typ t = eq_typ_wrapper ^"(" ^ t ^ "," ^ typ ^ ")";
paulson@15347
   638
paulson@18218
   639
(*Only need to wrap equality's arguments with "typeinfo" if the output clauses are typed 
paulson@18218
   640
 and if we specifically ask for types to be included.   *)
paulson@15347
   641
fun string_of_equality (typ,terms) =
paulson@17230
   642
      let val [tstr1,tstr2] = map string_of_term terms
mengj@18402
   643
	  val typ' = string_of_fol_type typ
paulson@17230
   644
      in
paulson@17230
   645
	  if !keep_types andalso !special_equal 
mengj@18402
   646
	  then "equal(" ^ (wrap_eq_type typ' tstr1) ^ "," ^ 
mengj@18402
   647
		 	  (wrap_eq_type typ' tstr2) ^ ")"
paulson@17230
   648
	  else "equal(" ^ tstr1 ^ "," ^ tstr2 ^ ")"
paulson@17230
   649
      end
paulson@17230
   650
and string_of_term (UVar(x,_)) = x
paulson@18218
   651
  | string_of_term (Fun("equal",[typ],terms)) = string_of_equality(typ,terms)
mengj@20015
   652
  | string_of_term (Fun (name,typs,[])) = name ^ (paren_pack (map string_of_fol_type typs))
paulson@18218
   653
  | string_of_term (Fun (name,typs,terms)) = 
paulson@18218
   654
      let val terms_as_strings = map string_of_term terms
mengj@18402
   655
	  val typs' = if !keep_types then map string_of_fol_type typs else []
paulson@18420
   656
      in  name ^ (paren_pack (terms_as_strings @ typs'))  end;
paulson@15347
   657
paulson@15347
   658
(* before output the string of the predicate, check if the predicate corresponds to an equality or not. *)
paulson@18218
   659
fun string_of_predicate (Predicate("equal",[typ],terms)) = string_of_equality(typ,terms)
paulson@18218
   660
  | string_of_predicate (Predicate(name,typs,terms)) = 
paulson@17230
   661
      let val terms_as_strings = map string_of_term terms
mengj@18402
   662
	  val typs' = if !keep_types then map string_of_fol_type typs else []
paulson@18420
   663
      in  name ^ (paren_pack (terms_as_strings @ typs'))  end;
paulson@17317
   664
paulson@17317
   665
fun string_of_clausename (cls_id,ax_name) = 
paulson@17525
   666
    clause_prefix ^ ascii_of ax_name ^ "_" ^ Int.toString cls_id;
paulson@17317
   667
paulson@17317
   668
fun string_of_type_clsname (cls_id,ax_name,idx) = 
paulson@17525
   669
    string_of_clausename (cls_id,ax_name) ^ "_tcs" ^ (Int.toString idx);
paulson@18863
   670
paulson@18863
   671
(*Write a list of strings to a file*)
paulson@18863
   672
fun writeln_strs os = List.app (fn s => TextIO.output (os,s));
paulson@18863
   673
quigley@17150
   674
    
paulson@18868
   675
(**** Producing DFG files ****)
quigley@17150
   676
paulson@18863
   677
(*Attach sign in DFG syntax: false means negate.*)
paulson@18863
   678
fun dfg_sign true s = s
paulson@18863
   679
  | dfg_sign false s = "not(" ^ s ^ ")"  
paulson@18863
   680
paulson@20018
   681
fun dfg_literal (Literal(pol,pred)) = dfg_sign pol (string_of_predicate pred)
quigley@17150
   682
paulson@18798
   683
fun dfg_of_typeLit (LTVar (s,ty)) = "not(" ^ s ^ "(" ^ ty ^ "))"
paulson@18856
   684
  | dfg_of_typeLit (LTFree (s,ty)) = s ^ "(" ^ ty ^ ")";
quigley@17150
   685
 
paulson@18868
   686
(*Enclose the clause body by quantifiers, if necessary*)
paulson@18868
   687
fun dfg_forall [] body = body  
paulson@18868
   688
  | dfg_forall vars body = "forall([" ^ commas vars ^ "],\n" ^ body ^ ")"
quigley@17150
   689
paulson@18868
   690
fun gen_dfg_cls (cls_id, ax_name, knd, lits, vars) = 
paulson@18868
   691
    "clause( %(" ^ knd ^ ")\n" ^ 
paulson@18868
   692
    dfg_forall vars ("or(" ^ lits ^ ")") ^ ",\n" ^ 
paulson@18863
   693
    string_of_clausename (cls_id,ax_name) ^  ").\n\n";
quigley@17150
   694
paulson@18869
   695
fun dfg_clause_aux (Clause{literals, types_sorts, ...}) = 
paulson@18868
   696
  let val lits = map dfg_literal literals
paulson@18869
   697
      val (tvar_lits,tfree_lits) = add_typs_aux types_sorts
paulson@17230
   698
      val tvar_lits_strs = 
paulson@18869
   699
	  if !keep_types then map dfg_of_typeLit tvar_lits else []
paulson@17230
   700
      val tfree_lits =
paulson@18869
   701
          if !keep_types then map dfg_of_typeLit tfree_lits else []
paulson@17230
   702
  in
paulson@17234
   703
      (tvar_lits_strs @ lits, tfree_lits)
paulson@17230
   704
  end; 
quigley@17150
   705
paulson@20018
   706
fun dfg_folterms (Literal(pol,pred)) = 
paulson@18856
   707
  let val Predicate (_, _, folterms) = pred
paulson@18218
   708
  in  folterms  end
quigley@17150
   709
paulson@17404
   710
fun get_uvars (UVar(a,typ)) = [a] 
paulson@18868
   711
  | get_uvars (Fun (_,typ,tlist)) = union_all(map get_uvars tlist)
paulson@17404
   712
paulson@18868
   713
fun dfg_vars (Clause {literals,...}) =
paulson@18920
   714
  union_all (map get_uvars (List.concat (map dfg_folterms literals)))
quigley@17150
   715
paulson@18798
   716
fun clause2dfg (cls as Clause{axiom_name,clause_id,kind,types_sorts,...}) =
paulson@17230
   717
    let val (lits,tfree_lits) = dfg_clause_aux cls 
paulson@18798
   718
            (*"lits" includes the typing assumptions (TVars)*)
quigley@17150
   719
        val vars = dfg_vars cls
paulson@18798
   720
        val tvars = get_tvar_strs types_sorts
paulson@18798
   721
	val knd = name_of_kind kind
paulson@17234
   722
	val lits_str = commas lits
paulson@18868
   723
	val cls_str = gen_dfg_cls(clause_id, axiom_name, knd, lits_str, tvars@vars) 
paulson@18798
   724
    in (cls_str, tfree_lits) end;
quigley@17150
   725
paulson@18798
   726
fun string_of_arity (name, num) =  "(" ^ name ^ "," ^ Int.toString num ^ ")"
quigley@17150
   727
paulson@18856
   728
fun string_of_preds [] = ""
paulson@18856
   729
  | string_of_preds preds = "predicates[" ^ commas(map string_of_arity preds) ^ "].\n";
quigley@17150
   730
paulson@18856
   731
fun string_of_funcs [] = ""
paulson@18856
   732
  | string_of_funcs funcs = "functions[" ^ commas(map string_of_arity funcs) ^ "].\n" ;
quigley@17150
   733
paulson@17234
   734
fun string_of_symbols predstr funcstr = 
paulson@17234
   735
  "list_of_symbols.\n" ^ predstr  ^ funcstr  ^ "end_of_list.\n\n";
quigley@17150
   736
paulson@18798
   737
fun string_of_start name = "begin_problem(" ^ name ^ ").\n\n";
quigley@17150
   738
paulson@18863
   739
fun string_of_descrip name = 
paulson@18868
   740
  "list_of_descriptions.\nname({*" ^ name ^ 
paulson@18868
   741
  "*}).\nauthor({*Isabelle*}).\nstatus(unknown).\ndescription({*auto-generated*}).\nend_of_list.\n\n"
quigley@17150
   742
paulson@18863
   743
fun dfg_tfree_clause tfree_lit =
paulson@18863
   744
  "clause( %(conjecture)\n" ^ "or( " ^ tfree_lit ^ "),\n" ^ "tfree_tcs" ^ ").\n\n"
paulson@18863
   745
paulson@17845
   746
fun string_of_arClauseID (ArityClause {clause_id,axiom_name,...}) =
paulson@17845
   747
    arclause_prefix ^ ascii_of axiom_name ^ "_" ^ Int.toString clause_id;
quigley@17150
   748
paulson@18863
   749
fun dfg_of_arLit (TConsLit(pol,(c,t,args))) =
paulson@18863
   750
      dfg_sign pol (c ^ "(" ^ t ^ paren_pack args ^ ")")
paulson@18863
   751
  | dfg_of_arLit (TVarLit(pol,(c,str))) =
paulson@18863
   752
      dfg_sign pol (c ^ "(" ^ str ^ ")")
paulson@17525
   753
    
paulson@18863
   754
fun dfg_classrelLits sub sup = 
paulson@18863
   755
    let val tvar = "(T)"
paulson@18863
   756
    in 
paulson@18863
   757
	"not(" ^ sub ^ tvar ^ "), " ^ sup ^ tvar
paulson@18863
   758
    end;
paulson@17525
   759
paulson@18868
   760
fun dfg_classrelClause (ClassrelClause {axiom_name,subclass,superclass,...}) =
paulson@18868
   761
  "clause(forall([T],\nor( " ^ dfg_classrelLits subclass superclass ^ ")),\n" ^
paulson@18868
   762
  axiom_name ^ ").\n\n";
paulson@18868
   763
      
paulson@18868
   764
fun dfg_arity_clause (arcls as ArityClause{kind,conclLit,premLits,...}) = 
paulson@18868
   765
  let val arcls_id = string_of_arClauseID arcls
paulson@18868
   766
      val knd = name_of_kind kind
paulson@18868
   767
      val TConsLit(_, (_,_,tvars)) = conclLit
paulson@18868
   768
      val lits = map dfg_of_arLit (conclLit :: premLits)
paulson@18863
   769
  in
paulson@18868
   770
      "clause( %(" ^ knd ^ ")\n" ^ 
paulson@18868
   771
      dfg_forall tvars ("or( " ^ commas lits ^ ")") ^ ",\n" ^
paulson@18868
   772
      arcls_id ^ ").\n\n"
paulson@18863
   773
  end;
paulson@18863
   774
paulson@18863
   775
(* write out a subgoal in DFG format to the file "xxxx_N"*)
mengj@19719
   776
fun dfg_write_file thms filename (axclauses,classrel_clauses,arity_clauses) = 
paulson@18863
   777
  let 
paulson@19207
   778
    val _ = Output.debug ("Preparing to write the DFG file " ^ filename)
mengj@19719
   779
    val conjectures = make_conjecture_clauses thms
mengj@19719
   780
    val axclauses' = make_axiom_clauses axclauses
paulson@18868
   781
    val (dfg_clss, tfree_litss) = ListPair.unzip (map clause2dfg conjectures)
mengj@19719
   782
    val clss = conjectures @ axclauses'
paulson@18868
   783
    val funcs = funcs_of_clauses clss arity_clauses
paulson@18868
   784
    and preds = preds_of_clauses clss classrel_clauses arity_clauses
paulson@18863
   785
    and probname = Path.pack (Path.base (Path.unpack filename))
mengj@19719
   786
    val (axstrs, _) = ListPair.unzip (map clause2dfg axclauses')
paulson@18863
   787
    val tfree_clss = map dfg_tfree_clause (union_all tfree_litss) 
paulson@19155
   788
    val out = TextIO.openOut filename
paulson@18863
   789
  in
paulson@18868
   790
    TextIO.output (out, string_of_start probname); 
paulson@18868
   791
    TextIO.output (out, string_of_descrip probname); 
paulson@18868
   792
    TextIO.output (out, string_of_symbols (string_of_funcs funcs) (string_of_preds preds)); 
paulson@18868
   793
    TextIO.output (out, "list_of_clauses(axioms,cnf).\n");
paulson@18868
   794
    writeln_strs out axstrs;
paulson@18868
   795
    List.app (curry TextIO.output out o dfg_classrelClause) classrel_clauses;
paulson@18868
   796
    List.app (curry TextIO.output out o dfg_arity_clause) arity_clauses;
paulson@18868
   797
    TextIO.output (out, "end_of_list.\n\nlist_of_clauses(conjectures,cnf).\n");
paulson@18868
   798
    writeln_strs out tfree_clss;
paulson@18868
   799
    writeln_strs out dfg_clss;
paulson@18868
   800
    TextIO.output (out, "end_of_list.\n\nend_problem.\n");
paulson@18868
   801
    TextIO.closeOut out
paulson@17525
   802
  end;
quigley@17150
   803
quigley@17150
   804
paulson@18869
   805
(**** Produce TPTP files ****)
paulson@18868
   806
paulson@18868
   807
(*Attach sign in TPTP syntax: false means negate.*)
paulson@18868
   808
fun tptp_sign true s = "++" ^ s
paulson@18868
   809
  | tptp_sign false s = "--" ^ s
paulson@18868
   810
paulson@20018
   811
fun tptp_literal (Literal(pol,pred)) = 
paulson@20018
   812
      (if pol then "++" else "--") ^ string_of_predicate pred;
paulson@15347
   813
paulson@18798
   814
fun tptp_of_typeLit (LTVar (s,ty)) = "--" ^ s ^ "(" ^ ty ^ ")"
paulson@18798
   815
  | tptp_of_typeLit (LTFree (s,ty)) = "++" ^ s ^ "(" ^ ty ^ ")";
paulson@15347
   816
 
paulson@15347
   817
fun gen_tptp_cls (cls_id,ax_name,knd,lits) = 
paulson@17317
   818
    "input_clause(" ^ string_of_clausename (cls_id,ax_name) ^ "," ^ 
paulson@18863
   819
    knd ^ "," ^ lits ^ ").\n";
paulson@15347
   820
paulson@17317
   821
fun gen_tptp_type_cls (cls_id,ax_name,knd,tfree_lit,idx) = 
paulson@17317
   822
    "input_clause(" ^ string_of_type_clsname (cls_id,ax_name,idx) ^ "," ^ 
paulson@18863
   823
    knd ^ ",[" ^ tfree_lit ^ "]).\n";
paulson@15347
   824
paulson@18869
   825
fun tptp_type_lits (Clause {literals, types_sorts, ...}) = 
paulson@18869
   826
    let val lits = map tptp_literal literals
paulson@18869
   827
	val (tvar_lits,tfree_lits) = add_typs_aux types_sorts
paulson@18869
   828
        val tvar_lits_strs =
paulson@18869
   829
            if !keep_types then map tptp_of_typeLit tvar_lits else []
paulson@18869
   830
	val tfree_lits =
paulson@18869
   831
	    if !keep_types then map tptp_of_typeLit tfree_lits else []
paulson@15347
   832
    in
paulson@17305
   833
	(tvar_lits_strs @ lits, tfree_lits)
paulson@15347
   834
    end; 
paulson@15347
   835
paulson@18869
   836
fun clause2tptp (cls as Clause {clause_id, axiom_name, kind, ...}) =
paulson@17422
   837
    let val (lits,tfree_lits) = tptp_type_lits cls 
paulson@17305
   838
            (*"lits" includes the typing assumptions (TVars)*)
paulson@18869
   839
	val knd = name_of_kind kind
paulson@18869
   840
	val cls_str = gen_tptp_cls(clause_id, axiom_name, knd, bracket_pack lits) 
paulson@15608
   841
    in
paulson@15608
   842
	(cls_str,tfree_lits) 
paulson@15608
   843
    end;
paulson@15608
   844
paulson@18863
   845
fun tptp_tfree_clause tfree_lit =
paulson@18863
   846
    "input_clause(" ^ "tfree_tcs," ^ "conjecture" ^ ",[" ^ tfree_lit ^ "]).\n";
paulson@15608
   847
paulson@17525
   848
fun tptp_of_arLit (TConsLit(b,(c,t,args))) =
paulson@18868
   849
      tptp_sign b (c ^ "(" ^ t ^ paren_pack args ^ ")")
paulson@17525
   850
  | tptp_of_arLit (TVarLit(b,(c,str))) =
paulson@18868
   851
      tptp_sign b (c ^ "(" ^ str ^ ")")
paulson@15347
   852
    
paulson@18868
   853
fun tptp_arity_clause (arcls as ArityClause{kind,conclLit,premLits,...}) = 
paulson@18868
   854
  let val arcls_id = string_of_arClauseID arcls
paulson@18868
   855
      val knd = name_of_kind kind
paulson@18868
   856
      val lits = map tptp_of_arLit (conclLit :: premLits)
paulson@18868
   857
  in
paulson@18868
   858
    "input_clause(" ^ arcls_id ^ "," ^ knd ^ "," ^ bracket_pack lits ^ ").\n"
paulson@18868
   859
  end;
paulson@15347
   860
paulson@15347
   861
fun tptp_classrelLits sub sup = 
paulson@15347
   862
    let val tvar = "(T)"
paulson@15347
   863
    in 
paulson@18411
   864
	"[--" ^ sub ^ tvar ^ ",++" ^ sup ^ tvar ^ "]"
paulson@15347
   865
    end;
paulson@15347
   866
paulson@18868
   867
fun tptp_classrelClause (ClassrelClause {axiom_name,subclass,superclass,...}) =
paulson@18868
   868
  "input_clause(" ^ axiom_name ^ ",axiom," ^ tptp_classrelLits subclass superclass ^ ").\n" 
quigley@17150
   869
paulson@18863
   870
(* write out a subgoal as tptp clauses to the file "xxxx_N"*)
mengj@19443
   871
fun tptp_write_file thms filename (axclauses,classrel_clauses,arity_clauses) =
paulson@18863
   872
  let
paulson@19207
   873
    val _ = Output.debug ("Preparing to write the TPTP file " ^ filename)
mengj@19443
   874
    val clss = make_conjecture_clauses thms
mengj@19443
   875
    val axclauses' = make_axiom_clauses axclauses
paulson@18863
   876
    val (tptp_clss,tfree_litss) = ListPair.unzip (map clause2tptp clss)
paulson@18863
   877
    val tfree_clss = map tptp_tfree_clause (foldl (op union_string) [] tfree_litss)
paulson@18863
   878
    val out = TextIO.openOut filename
paulson@18863
   879
  in
mengj@19197
   880
    List.app (curry TextIO.output out o #1 o clause2tptp) axclauses';
paulson@18863
   881
    writeln_strs out tfree_clss;
paulson@18863
   882
    writeln_strs out tptp_clss;
paulson@18868
   883
    List.app (curry TextIO.output out o tptp_classrelClause) classrel_clauses;
paulson@18868
   884
    List.app (curry TextIO.output out o tptp_arity_clause) arity_clauses;
paulson@18863
   885
    TextIO.closeOut out
paulson@18863
   886
  end;
paulson@18863
   887
mengj@19354
   888
mengj@19354
   889
mengj@19354
   890
mengj@19354
   891
paulson@15347
   892
end;