--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/HOL/TPTP/atp_problem_import.ML Mon Jan 23 17:40:32 2012 +0100
@@ -0,0 +1,170 @@
+(* Title: HOL/TPTP/atp_problem_import.ML
+ Author: Jasmin Blanchette, TU Muenchen
+ Copyright 2012
+
+Import TPTP problems as Isabelle terms or goals.
+*)
+
+signature ATP_PROBLEM_IMPORT =
+sig
+ val isabelle_tptp_file : string -> unit
+ val nitpick_tptp_file : string -> unit
+ val refute_tptp_file : string -> unit
+ val sledgehammer_tptp_file : string -> unit
+ val translate_tptp_file : string -> unit
+end;
+
+structure ATP_Problem_Import : ATP_PROBLEM_IMPORT =
+struct
+
+open ATP_Util
+open ATP_Problem
+open ATP_Proof
+open Nitpick_Util
+open Nitpick
+open Nitpick_Isar
+
+
+(** General TPTP parsing **)
+
+exception SYNTAX of string
+
+val tptp_explode = raw_explode o strip_spaces_except_between_idents
+
+fun parse_file_path (c :: ss) =
+ if c = "'" orelse c = "\"" then
+ ss |> chop_while (curry (op <>) c) |>> implode ||> tl
+ else
+ raise SYNTAX "invalid file path"
+ | parse_file_path [] = raise SYNTAX "invalid file path"
+
+fun parse_include x =
+ let
+ val (file_name, rest) =
+ (Scan.this_string "include" |-- $$ "(" |-- parse_file_path --| $$ ")"
+ --| $$ ".") x
+ val path = file_name |> Path.explode
+ val path =
+ path |> not (Path.is_absolute path) ? Path.append (Path.explode "$TPTP")
+ in ((), (path |> File.read |> tptp_explode) @ rest) end
+
+val parse_cnf_or_fof =
+ (Scan.this_string "cnf" || Scan.this_string "fof") |-- $$ "(" |--
+ Scan.many (not_equal ",") |-- $$ "," |--
+ (Scan.this_string "axiom" || Scan.this_string "definition"
+ || Scan.this_string "theorem" || Scan.this_string "lemma"
+ || Scan.this_string "hypothesis" || Scan.this_string "conjecture"
+ || Scan.this_string "negated_conjecture") --| $$ "," -- parse_formula
+ --| $$ ")" --| $$ "."
+ >> (fn ("conjecture", phi) => AConn (ANot, [phi]) | (_, phi) => phi)
+
+val parse_problem =
+ Scan.repeat parse_include
+ |-- Scan.repeat (parse_cnf_or_fof --| Scan.repeat parse_include)
+
+val parse_tptp_problem =
+ Scan.finite Symbol.stopper
+ (Scan.error (!! (fn _ => raise SYNTAX "malformed TPTP input")
+ parse_problem))
+ o tptp_explode
+
+val iota_T = @{typ iota}
+val quant_T = (iota_T --> bool_T) --> bool_T
+
+fun is_variable s = Char.isUpper (String.sub (s, 0))
+
+fun hol_term_from_fo_term res_T (ATerm (x, us)) =
+ let val ts = map (hol_term_from_fo_term iota_T) us in
+ list_comb ((case x of
+ "$true" => @{const_name True}
+ | "$false" => @{const_name False}
+ | "=" => @{const_name HOL.eq}
+ | "equal" => @{const_name HOL.eq}
+ | _ => x, map fastype_of ts ---> res_T)
+ |> (if is_variable x then Free else Const), ts)
+ end
+
+fun hol_prop_from_formula phi =
+ case phi of
+ AQuant (_, [], phi') => hol_prop_from_formula phi'
+ | AQuant (q, (x, _) :: xs, phi') =>
+ Const (case q of AForall => @{const_name All} | AExists => @{const_name Ex},
+ quant_T)
+ $ lambda (Free (x, iota_T)) (hol_prop_from_formula (AQuant (q, xs, phi')))
+ | AConn (ANot, [u']) => HOLogic.mk_not (hol_prop_from_formula u')
+ | AConn (c, [u1, u2]) =>
+ pairself hol_prop_from_formula (u1, u2)
+ |> (case c of
+ AAnd => HOLogic.mk_conj
+ | AOr => HOLogic.mk_disj
+ | AImplies => HOLogic.mk_imp
+ | AIff => HOLogic.mk_eq
+ | ANot => raise Fail "binary \"ANot\"")
+ | AConn _ => raise Fail "malformed AConn"
+ | AAtom u => hol_term_from_fo_term bool_T u
+
+fun mk_all x t = Const (@{const_name All}, quant_T) $ lambda x t
+
+fun close_hol_prop t = fold (mk_all o Free) (Term.add_frees t []) t
+
+
+(** Isabelle (combination of provers) **)
+
+fun isabelle_tptp_file file_name = ()
+
+
+(** Nitpick (alias Nitrox) **)
+
+fun nitpick_tptp_file file_name =
+ case parse_tptp_problem (File.read (Path.explode file_name)) of
+ (_, s :: ss) => raise SYNTAX ("cannot parse " ^ quote (implode (s :: ss)))
+ | (phis, []) =>
+ let
+ val ts = map (HOLogic.mk_Trueprop o close_hol_prop
+ o hol_prop_from_formula) phis
+(*
+ val _ = warning (PolyML.makestring phis)
+ val _ = app (warning o Syntax.string_of_term @{context}) ts
+*)
+ val state = Proof.init @{context}
+ val params =
+ [("card iota", "1\<emdash>100"),
+ ("card", "1\<emdash>8"),
+ ("box", "false"),
+ ("sat_solver", "smart"),
+ ("max_threads", "1"),
+ ("batch_size", "10"),
+ (* ("debug", "true"), *)
+ ("verbose", "true"),
+ (* ("overlord", "true"), *)
+ ("show_consts", "true"),
+ ("format", "1000"),
+ ("max_potential", "0"),
+ ("timeout", "none"),
+ ("expect", genuineN)]
+ |> default_params @{theory}
+ val i = 1
+ val n = 1
+ val step = 0
+ val subst = []
+ in
+ pick_nits_in_term state params Normal i n step subst ts @{prop False};
+ ()
+ end
+
+
+(** Refute **)
+
+fun refute_tptp_file file_name = ()
+
+
+(** Sledgehammer **)
+
+fun sledgehammer_tptp_file file_name = ()
+
+
+(** Translator between TPTP(-like) file formats **)
+
+fun translate_tptp_file file_name = ()
+
+end;