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(* Title: HOL/Tools/Sledgehammer/sledgehammer_atp_translate.ML
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Author: Fabian Immler, TU Muenchen
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Author: Makarius
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Author: Jasmin Blanchette, TU Muenchen
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Translation of HOL to FOL for Sledgehammer.
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*)
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signature SLEDGEHAMMER_ATP_TRANSLATE =
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sig
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type 'a fo_term = 'a ATP_Problem.fo_term
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type formula_kind = ATP_Problem.formula_kind
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type 'a problem = 'a ATP_Problem.problem
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type locality = Sledgehammer_Filter.locality
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datatype polymorphism = Polymorphic | Monomorphic | Mangled_Monomorphic
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datatype type_level =
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All_Types | Nonmonotonic_Types | Finite_Types | Const_Arg_Types | No_Types
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datatype type_system =
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Simple_Types of type_level |
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Preds of polymorphism * type_level |
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Tags of polymorphism * type_level
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type translated_formula
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val readable_names : bool Config.T
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val fact_prefix : string
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val conjecture_prefix : string
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val predicator_base : string
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val explicit_app_base : string
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val type_pred_base : string
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val tff_type_prefix : string
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val type_sys_from_string : string -> type_system
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val polymorphism_of_type_sys : type_system -> polymorphism
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val level_of_type_sys : type_system -> type_level
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val is_type_sys_virtually_sound : type_system -> bool
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val is_type_sys_fairly_sound : type_system -> bool
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val num_atp_type_args : theory -> type_system -> string -> int
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val unmangled_const : string -> string * string fo_term list
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val translate_atp_fact :
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Proof.context -> bool -> (string * locality) * thm
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-> translated_formula option * ((string * locality) * thm)
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val prepare_atp_problem :
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Proof.context -> formula_kind -> formula_kind -> type_system -> bool
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-> term list -> term
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-> (translated_formula option * ((string * 'a) * thm)) list
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-> string problem * string Symtab.table * int * int
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* (string * 'a) list vector
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val atp_problem_weights : string problem -> (string * real) list
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end;
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structure Sledgehammer_ATP_Translate : SLEDGEHAMMER_ATP_TRANSLATE =
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struct
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open ATP_Problem
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open Metis_Translate
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open Sledgehammer_Util
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open Sledgehammer_Filter
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(* experimental *)
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val generate_useful_info = false
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(* Readable names are often much shorter, especially if types are mangled in
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names. Also, the logic for generating legal SNARK sort names is only
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implemented for readable names. Finally, readable names are, well, more
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readable. For these reason, they are enabled by default. *)
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val readable_names =
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Attrib.setup_config_bool @{binding sledgehammer_atp_readable_names} (K true)
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val type_decl_prefix = "type_"
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val sym_decl_prefix = "sym_"
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val fact_prefix = "fact_"
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val conjecture_prefix = "conj_"
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val helper_prefix = "help_"
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val class_rel_clause_prefix = "crel_";
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val arity_clause_prefix = "arity_"
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val tfree_prefix = "tfree_"
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val predicator_base = "hBOOL"
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val explicit_app_base = "hAPP"
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val type_pred_base = "is"
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val tff_type_prefix = "ty_"
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fun make_tff_type s = tff_type_prefix ^ ascii_of s
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(* Freshness almost guaranteed! *)
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val sledgehammer_weak_prefix = "Sledgehammer:"
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datatype polymorphism = Polymorphic | Monomorphic | Mangled_Monomorphic
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datatype type_level =
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All_Types | Nonmonotonic_Types | Finite_Types | Const_Arg_Types | No_Types
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datatype type_system =
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Simple_Types of type_level |
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Preds of polymorphism * type_level |
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Tags of polymorphism * type_level
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fun try_unsuffixes ss s =
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fold (fn s' => fn NONE => try (unsuffix s') s | some => some) ss NONE
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fun type_sys_from_string s =
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(case try (unprefix "poly_") s of
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SOME s => (SOME Polymorphic, s)
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| NONE =>
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case try (unprefix "mono_") s of
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SOME s => (SOME Monomorphic, s)
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| NONE =>
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case try (unprefix "mangled_") s of
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SOME s => (SOME Mangled_Monomorphic, s)
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| NONE => (NONE, s))
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||> (fn s =>
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(* "_query" and "_bang" are for the ASCII-challenged Mirabelle. *)
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case try_unsuffixes ["?", "_query"] s of
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SOME s => (Nonmonotonic_Types, s)
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| NONE =>
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case try_unsuffixes ["!", "_bang"] s of
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SOME s => (Finite_Types, s)
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| NONE => (All_Types, s))
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|> (fn (poly, (level, core)) =>
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case (core, (poly, level)) of
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("simple_types", (NONE, level)) => Simple_Types level
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| ("preds", (SOME poly, level)) => Preds (poly, level)
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| ("tags", (SOME poly, level)) => Tags (poly, level)
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| ("args", (SOME poly, All_Types (* naja *))) =>
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Preds (poly, Const_Arg_Types)
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| ("erased", (NONE, All_Types (* naja *))) =>
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Preds (Polymorphic, No_Types)
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| _ => error ("Unknown type system: " ^ quote s ^ "."))
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fun polymorphism_of_type_sys (Simple_Types _) = Mangled_Monomorphic
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| polymorphism_of_type_sys (Preds (poly, _)) = poly
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| polymorphism_of_type_sys (Tags (poly, _)) = poly
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fun level_of_type_sys (Simple_Types level) = level
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| level_of_type_sys (Preds (_, level)) = level
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| level_of_type_sys (Tags (_, level)) = level
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fun is_type_level_virtually_sound level =
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level = All_Types orelse level = Nonmonotonic_Types
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val is_type_sys_virtually_sound =
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is_type_level_virtually_sound o level_of_type_sys
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fun is_type_level_fairly_sound level =
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is_type_level_virtually_sound level orelse level = Finite_Types
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val is_type_sys_fairly_sound = is_type_level_fairly_sound o level_of_type_sys
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fun is_type_level_partial level =
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level = Nonmonotonic_Types orelse level = Finite_Types
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fun formula_map f (AQuant (q, xs, phi)) = AQuant (q, xs, formula_map f phi)
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| formula_map f (AConn (c, phis)) = AConn (c, map (formula_map f) phis)
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| formula_map f (AAtom tm) = AAtom (f tm)
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fun formula_fold pos f =
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let
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fun aux pos (AQuant (_, _, phi)) = aux pos phi
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| aux pos (AConn (ANot, [phi])) = aux (Option.map not pos) phi
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| aux pos (AConn (AImplies, [phi1, phi2])) =
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aux (Option.map not pos) phi1 #> aux pos phi2
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| aux pos (AConn (AAnd, phis)) = fold (aux pos) phis
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| aux pos (AConn (AOr, phis)) = fold (aux pos) phis
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| aux _ (AConn (_, phis)) = fold (aux NONE) phis
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| aux pos (AAtom tm) = f pos tm
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in aux (SOME pos) end
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type translated_formula =
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{name: string,
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locality: locality,
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kind: formula_kind,
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combformula: (name, typ, combterm) formula,
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atomic_types: typ list}
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fun update_combformula f ({name, locality, kind, combformula, atomic_types}
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: translated_formula) =
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{name = name, locality = locality, kind = kind, combformula = f combformula,
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atomic_types = atomic_types} : translated_formula
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fun fact_lift f ({combformula, ...} : translated_formula) = f combformula
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val boring_consts = [explicit_app_base, @{const_name Metis.fequal}]
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fun should_omit_type_args type_sys s =
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s <> type_pred_base andalso s <> type_tag_name andalso
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(s = @{const_name HOL.eq} orelse level_of_type_sys type_sys = No_Types orelse
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(case type_sys of
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Tags (_, All_Types) => true
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| _ => polymorphism_of_type_sys type_sys <> Mangled_Monomorphic andalso
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member (op =) boring_consts s))
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datatype type_arg_policy = No_Type_Args | Explicit_Type_Args | Mangled_Type_Args
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fun general_type_arg_policy type_sys =
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if level_of_type_sys type_sys = No_Types then
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No_Type_Args
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else if polymorphism_of_type_sys type_sys = Mangled_Monomorphic then
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Mangled_Type_Args
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else
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Explicit_Type_Args
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fun type_arg_policy type_sys s =
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if should_omit_type_args type_sys s then No_Type_Args
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else general_type_arg_policy type_sys
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fun num_atp_type_args thy type_sys s =
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if type_arg_policy type_sys s = Explicit_Type_Args then num_type_args thy s
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else 0
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fun atp_type_literals_for_types type_sys kind Ts =
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if level_of_type_sys type_sys = No_Types then
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[]
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else
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Ts |> type_literals_for_types
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|> filter (fn TyLitVar _ => kind <> Conjecture
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| TyLitFree _ => kind = Conjecture)
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fun mk_anot phi = AConn (ANot, [phi])
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fun mk_aconn c phi1 phi2 = AConn (c, [phi1, phi2])
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fun mk_aconns c phis =
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let val (phis', phi') = split_last phis in
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fold_rev (mk_aconn c) phis' phi'
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end
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fun mk_ahorn [] phi = phi
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| mk_ahorn phis psi = AConn (AImplies, [mk_aconns AAnd phis, psi])
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fun mk_aquant _ [] phi = phi
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| mk_aquant q xs (phi as AQuant (q', xs', phi')) =
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if q = q' then AQuant (q, xs @ xs', phi') else AQuant (q, xs, phi)
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| mk_aquant q xs phi = AQuant (q, xs, phi)
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fun close_universally atom_vars phi =
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let
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fun formula_vars bounds (AQuant (_, xs, phi)) =
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formula_vars (map fst xs @ bounds) phi
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| formula_vars bounds (AConn (_, phis)) = fold (formula_vars bounds) phis
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| formula_vars bounds (AAtom tm) =
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union (op =) (atom_vars tm []
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|> filter_out (member (op =) bounds o fst))
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in mk_aquant AForall (formula_vars [] phi []) phi end
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fun combterm_vars (CombApp (tm1, tm2)) = fold combterm_vars [tm1, tm2]
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| combterm_vars (CombConst _) = I
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| combterm_vars (CombVar (name, T)) = insert (op =) (name, SOME T)
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fun close_combformula_universally phi = close_universally combterm_vars phi
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fun term_vars (ATerm (name as (s, _), tms)) =
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is_atp_variable s ? insert (op =) (name, NONE)
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#> fold term_vars tms
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fun close_formula_universally phi = close_universally term_vars phi
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fun fo_term_from_typ (Type (s, Ts)) =
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ATerm (`make_fixed_type_const s, map fo_term_from_typ Ts)
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| fo_term_from_typ (TFree (s, _)) =
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ATerm (`make_fixed_type_var s, [])
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| fo_term_from_typ (TVar ((x as (s, _)), _)) =
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ATerm ((make_schematic_type_var x, s), [])
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(* This shouldn't clash with anything else. *)
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val mangled_type_sep = "\000"
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fun generic_mangled_type_name f (ATerm (name, [])) = f name
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| generic_mangled_type_name f (ATerm (name, tys)) =
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f name ^ "(" ^ commas (map (generic_mangled_type_name f) tys) ^ ")"
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val mangled_type_name =
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fo_term_from_typ
|
blanchet@43433
|
265 |
#> (fn ty => (make_tff_type (generic_mangled_type_name fst ty),
|
blanchet@43433
|
266 |
generic_mangled_type_name snd ty))
|
blanchet@43413
|
267 |
|
blanchet@43445
|
268 |
fun generic_mangled_type_suffix f g Ts =
|
blanchet@43413
|
269 |
fold_rev (curry (op ^) o g o prefix mangled_type_sep
|
blanchet@43445
|
270 |
o generic_mangled_type_name f) Ts ""
|
blanchet@43433
|
271 |
fun mangled_const_name T_args (s, s') =
|
blanchet@43433
|
272 |
let val ty_args = map fo_term_from_typ T_args in
|
blanchet@43433
|
273 |
(s ^ generic_mangled_type_suffix fst ascii_of ty_args,
|
blanchet@43433
|
274 |
s' ^ generic_mangled_type_suffix snd I ty_args)
|
blanchet@43433
|
275 |
end
|
blanchet@43413
|
276 |
|
blanchet@43413
|
277 |
val parse_mangled_ident =
|
blanchet@43413
|
278 |
Scan.many1 (not o member (op =) ["(", ")", ","]) >> implode
|
blanchet@43413
|
279 |
|
blanchet@43413
|
280 |
fun parse_mangled_type x =
|
blanchet@43413
|
281 |
(parse_mangled_ident
|
blanchet@43413
|
282 |
-- Scan.optional ($$ "(" |-- Scan.optional parse_mangled_types [] --| $$ ")")
|
blanchet@43413
|
283 |
[] >> ATerm) x
|
blanchet@43413
|
284 |
and parse_mangled_types x =
|
blanchet@43413
|
285 |
(parse_mangled_type ::: Scan.repeat ($$ "," |-- parse_mangled_type)) x
|
blanchet@43413
|
286 |
|
blanchet@43413
|
287 |
fun unmangled_type s =
|
blanchet@43413
|
288 |
s |> suffix ")" |> raw_explode
|
blanchet@43413
|
289 |
|> Scan.finite Symbol.stopper
|
blanchet@43413
|
290 |
(Scan.error (!! (fn _ => raise Fail ("unrecognized mangled type " ^
|
blanchet@43413
|
291 |
quote s)) parse_mangled_type))
|
blanchet@43413
|
292 |
|> fst
|
blanchet@43413
|
293 |
|
blanchet@43432
|
294 |
val unmangled_const_name = space_explode mangled_type_sep #> hd
|
blanchet@43413
|
295 |
fun unmangled_const s =
|
blanchet@43413
|
296 |
let val ss = space_explode mangled_type_sep s in
|
blanchet@43413
|
297 |
(hd ss, map unmangled_type (tl ss))
|
blanchet@43413
|
298 |
end
|
blanchet@43413
|
299 |
|
blanchet@43545
|
300 |
fun introduce_proxies tm =
|
blanchet@43439
|
301 |
let
|
blanchet@43439
|
302 |
fun aux top_level (CombApp (tm1, tm2)) =
|
blanchet@43439
|
303 |
CombApp (aux top_level tm1, aux false tm2)
|
blanchet@43445
|
304 |
| aux top_level (CombConst (name as (s, s'), T, T_args)) =
|
blanchet@43441
|
305 |
(case proxify_const s of
|
blanchet@43439
|
306 |
SOME proxy_base =>
|
blanchet@43439
|
307 |
if top_level then
|
blanchet@43439
|
308 |
(case s of
|
blanchet@43439
|
309 |
"c_False" => (tptp_false, s')
|
blanchet@43439
|
310 |
| "c_True" => (tptp_true, s')
|
blanchet@43439
|
311 |
| _ => name, [])
|
blanchet@43440
|
312 |
else
|
blanchet@43445
|
313 |
(proxy_base |>> prefix const_prefix, T_args)
|
blanchet@43445
|
314 |
| NONE => (name, T_args))
|
blanchet@43445
|
315 |
|> (fn (name, T_args) => CombConst (name, T, T_args))
|
blanchet@43439
|
316 |
| aux _ tm = tm
|
blanchet@43545
|
317 |
in aux true tm end
|
blanchet@43439
|
318 |
|
blanchet@43433
|
319 |
fun combformula_from_prop thy eq_as_iff =
|
blanchet@38506
|
320 |
let
|
blanchet@43439
|
321 |
fun do_term bs t atomic_types =
|
blanchet@41388
|
322 |
combterm_from_term thy bs (Envir.eta_contract t)
|
blanchet@43439
|
323 |
|>> (introduce_proxies #> AAtom)
|
blanchet@43439
|
324 |
||> union (op =) atomic_types
|
blanchet@38506
|
325 |
fun do_quant bs q s T t' =
|
blanchet@38743
|
326 |
let val s = Name.variant (map fst bs) s in
|
blanchet@38743
|
327 |
do_formula ((s, T) :: bs) t'
|
blanchet@43433
|
328 |
#>> mk_aquant q [(`make_bound_var s, SOME T)]
|
blanchet@38743
|
329 |
end
|
blanchet@38506
|
330 |
and do_conn bs c t1 t2 =
|
blanchet@38506
|
331 |
do_formula bs t1 ##>> do_formula bs t2
|
blanchet@43402
|
332 |
#>> uncurry (mk_aconn c)
|
blanchet@38506
|
333 |
and do_formula bs t =
|
blanchet@38506
|
334 |
case t of
|
blanchet@43402
|
335 |
@{const Not} $ t1 => do_formula bs t1 #>> mk_anot
|
blanchet@38506
|
336 |
| Const (@{const_name All}, _) $ Abs (s, T, t') =>
|
blanchet@38506
|
337 |
do_quant bs AForall s T t'
|
blanchet@38506
|
338 |
| Const (@{const_name Ex}, _) $ Abs (s, T, t') =>
|
blanchet@38506
|
339 |
do_quant bs AExists s T t'
|
haftmann@39028
|
340 |
| @{const HOL.conj} $ t1 $ t2 => do_conn bs AAnd t1 t2
|
haftmann@39028
|
341 |
| @{const HOL.disj} $ t1 $ t2 => do_conn bs AOr t1 t2
|
haftmann@39019
|
342 |
| @{const HOL.implies} $ t1 $ t2 => do_conn bs AImplies t1 t2
|
haftmann@39093
|
343 |
| Const (@{const_name HOL.eq}, Type (_, [@{typ bool}, _])) $ t1 $ t2 =>
|
blanchet@41388
|
344 |
if eq_as_iff then do_conn bs AIff t1 t2 else do_term bs t
|
blanchet@41388
|
345 |
| _ => do_term bs t
|
blanchet@38506
|
346 |
in do_formula [] end
|
blanchet@38506
|
347 |
|
blanchet@38841
|
348 |
val presimplify_term = prop_of o Meson.presimplify oo Skip_Proof.make_thm
|
blanchet@38506
|
349 |
|
wenzelm@41739
|
350 |
fun concealed_bound_name j = sledgehammer_weak_prefix ^ string_of_int j
|
blanchet@38506
|
351 |
fun conceal_bounds Ts t =
|
blanchet@38506
|
352 |
subst_bounds (map (Free o apfst concealed_bound_name)
|
blanchet@38506
|
353 |
(0 upto length Ts - 1 ~~ Ts), t)
|
blanchet@38506
|
354 |
fun reveal_bounds Ts =
|
blanchet@38506
|
355 |
subst_atomic (map (fn (j, T) => (Free (concealed_bound_name j, T), Bound j))
|
blanchet@38506
|
356 |
(0 upto length Ts - 1 ~~ Ts))
|
blanchet@38506
|
357 |
|
blanchet@38831
|
358 |
(* Removes the lambdas from an equation of the form "t = (%x. u)".
|
blanchet@40071
|
359 |
(Cf. "extensionalize_theorem" in "Meson_Clausify".) *)
|
blanchet@38831
|
360 |
fun extensionalize_term t =
|
blanchet@38831
|
361 |
let
|
blanchet@38831
|
362 |
fun aux j (@{const Trueprop} $ t') = @{const Trueprop} $ aux j t'
|
blanchet@38831
|
363 |
| aux j (t as Const (s, Type (_, [Type (_, [_, T']),
|
blanchet@38831
|
364 |
Type (_, [_, res_T])]))
|
blanchet@38831
|
365 |
$ t2 $ Abs (var_s, var_T, t')) =
|
haftmann@39093
|
366 |
if s = @{const_name HOL.eq} orelse s = @{const_name "=="} then
|
blanchet@38831
|
367 |
let val var_t = Var ((var_s, j), var_T) in
|
blanchet@38831
|
368 |
Const (s, T' --> T' --> res_T)
|
blanchet@38831
|
369 |
$ betapply (t2, var_t) $ subst_bound (var_t, t')
|
blanchet@38831
|
370 |
|> aux (j + 1)
|
blanchet@38831
|
371 |
end
|
blanchet@38831
|
372 |
else
|
blanchet@38831
|
373 |
t
|
blanchet@38831
|
374 |
| aux _ t = t
|
blanchet@38831
|
375 |
in aux (maxidx_of_term t + 1) t end
|
blanchet@38831
|
376 |
|
blanchet@38506
|
377 |
fun introduce_combinators_in_term ctxt kind t =
|
wenzelm@43232
|
378 |
let val thy = Proof_Context.theory_of ctxt in
|
blanchet@38716
|
379 |
if Meson.is_fol_term thy t then
|
blanchet@38716
|
380 |
t
|
blanchet@38716
|
381 |
else
|
blanchet@38716
|
382 |
let
|
blanchet@38716
|
383 |
fun aux Ts t =
|
blanchet@38716
|
384 |
case t of
|
blanchet@38716
|
385 |
@{const Not} $ t1 => @{const Not} $ aux Ts t1
|
blanchet@38716
|
386 |
| (t0 as Const (@{const_name All}, _)) $ Abs (s, T, t') =>
|
blanchet@38716
|
387 |
t0 $ Abs (s, T, aux (T :: Ts) t')
|
blanchet@38890
|
388 |
| (t0 as Const (@{const_name All}, _)) $ t1 =>
|
blanchet@38890
|
389 |
aux Ts (t0 $ eta_expand Ts t1 1)
|
blanchet@38716
|
390 |
| (t0 as Const (@{const_name Ex}, _)) $ Abs (s, T, t') =>
|
blanchet@38716
|
391 |
t0 $ Abs (s, T, aux (T :: Ts) t')
|
blanchet@38890
|
392 |
| (t0 as Const (@{const_name Ex}, _)) $ t1 =>
|
blanchet@38890
|
393 |
aux Ts (t0 $ eta_expand Ts t1 1)
|
haftmann@39028
|
394 |
| (t0 as @{const HOL.conj}) $ t1 $ t2 => t0 $ aux Ts t1 $ aux Ts t2
|
haftmann@39028
|
395 |
| (t0 as @{const HOL.disj}) $ t1 $ t2 => t0 $ aux Ts t1 $ aux Ts t2
|
haftmann@39019
|
396 |
| (t0 as @{const HOL.implies}) $ t1 $ t2 => t0 $ aux Ts t1 $ aux Ts t2
|
haftmann@39093
|
397 |
| (t0 as Const (@{const_name HOL.eq}, Type (_, [@{typ bool}, _])))
|
blanchet@38716
|
398 |
$ t1 $ t2 =>
|
blanchet@38716
|
399 |
t0 $ aux Ts t1 $ aux Ts t2
|
blanchet@38716
|
400 |
| _ => if not (exists_subterm (fn Abs _ => true | _ => false) t) then
|
blanchet@38716
|
401 |
t
|
blanchet@38716
|
402 |
else
|
blanchet@38716
|
403 |
t |> conceal_bounds Ts
|
blanchet@38716
|
404 |
|> Envir.eta_contract
|
blanchet@38716
|
405 |
|> cterm_of thy
|
blanchet@40071
|
406 |
|> Meson_Clausify.introduce_combinators_in_cterm
|
blanchet@38716
|
407 |
|> prop_of |> Logic.dest_equals |> snd
|
blanchet@38716
|
408 |
|> reveal_bounds Ts
|
blanchet@39616
|
409 |
val (t, ctxt') = Variable.import_terms true [t] ctxt |>> the_single
|
blanchet@38716
|
410 |
in t |> aux [] |> singleton (Variable.export_terms ctxt' ctxt) end
|
blanchet@38716
|
411 |
handle THM _ =>
|
blanchet@38716
|
412 |
(* A type variable of sort "{}" will make abstraction fail. *)
|
blanchet@38836
|
413 |
if kind = Conjecture then HOLogic.false_const
|
blanchet@38836
|
414 |
else HOLogic.true_const
|
blanchet@38716
|
415 |
end
|
blanchet@38506
|
416 |
|
blanchet@38506
|
417 |
(* Metis's use of "resolve_tac" freezes the schematic variables. We simulate the
|
blanchet@43224
|
418 |
same in Sledgehammer to prevent the discovery of unreplayable proofs. *)
|
blanchet@38506
|
419 |
fun freeze_term t =
|
blanchet@38506
|
420 |
let
|
blanchet@38506
|
421 |
fun aux (t $ u) = aux t $ aux u
|
blanchet@38506
|
422 |
| aux (Abs (s, T, t)) = Abs (s, T, aux t)
|
blanchet@38506
|
423 |
| aux (Var ((s, i), T)) =
|
blanchet@38506
|
424 |
Free (sledgehammer_weak_prefix ^ s ^ "_" ^ string_of_int i, T)
|
blanchet@38506
|
425 |
| aux t = t
|
blanchet@38506
|
426 |
in t |> exists_subterm is_Var t ? aux end
|
blanchet@38506
|
427 |
|
blanchet@40445
|
428 |
(* making fact and conjecture formulas *)
|
blanchet@43511
|
429 |
fun make_formula ctxt eq_as_iff presimp name loc kind t =
|
blanchet@38506
|
430 |
let
|
wenzelm@43232
|
431 |
val thy = Proof_Context.theory_of ctxt
|
blanchet@38831
|
432 |
val t = t |> Envir.beta_eta_contract
|
blanchet@38890
|
433 |
|> transform_elim_term
|
blanchet@41459
|
434 |
|> Object_Logic.atomize_term thy
|
blanchet@43434
|
435 |
val need_trueprop = (fastype_of t = @{typ bool})
|
blanchet@38890
|
436 |
val t = t |> need_trueprop ? HOLogic.mk_Trueprop
|
blanchet@38506
|
437 |
|> extensionalize_term
|
blanchet@38506
|
438 |
|> presimp ? presimplify_term thy
|
blanchet@38506
|
439 |
|> perhaps (try (HOLogic.dest_Trueprop))
|
blanchet@38506
|
440 |
|> introduce_combinators_in_term ctxt kind
|
blanchet@38836
|
441 |
|> kind <> Axiom ? freeze_term
|
blanchet@43433
|
442 |
val (combformula, atomic_types) =
|
blanchet@43433
|
443 |
combformula_from_prop thy eq_as_iff t []
|
blanchet@38506
|
444 |
in
|
blanchet@43511
|
445 |
{name = name, locality = loc, kind = kind, combformula = combformula,
|
blanchet@43433
|
446 |
atomic_types = atomic_types}
|
blanchet@38506
|
447 |
end
|
blanchet@38506
|
448 |
|
blanchet@43511
|
449 |
fun make_fact ctxt keep_trivial eq_as_iff presimp ((name, loc), t) =
|
blanchet@43511
|
450 |
case (keep_trivial, make_formula ctxt eq_as_iff presimp name loc Axiom t) of
|
blanchet@42861
|
451 |
(false, {combformula = AAtom (CombConst (("c_True", _), _, _)), ...}) =>
|
blanchet@42861
|
452 |
NONE
|
blanchet@42861
|
453 |
| (_, formula) => SOME formula
|
blanchet@43432
|
454 |
|
blanchet@43580
|
455 |
fun make_conjecture ctxt prem_kind ts =
|
blanchet@38836
|
456 |
let val last = length ts - 1 in
|
blanchet@43580
|
457 |
map2 (fn j => fn t =>
|
blanchet@43580
|
458 |
let
|
blanchet@43580
|
459 |
val (kind, maybe_negate) =
|
blanchet@43580
|
460 |
if j = last then
|
blanchet@43580
|
461 |
(Conjecture, I)
|
blanchet@43580
|
462 |
else
|
blanchet@43580
|
463 |
(prem_kind,
|
blanchet@43580
|
464 |
if prem_kind = Conjecture then update_combformula mk_anot
|
blanchet@43580
|
465 |
else I)
|
blanchet@43580
|
466 |
in
|
blanchet@43580
|
467 |
make_formula ctxt true true (string_of_int j) Chained kind t
|
blanchet@43580
|
468 |
|> maybe_negate
|
blanchet@43580
|
469 |
end)
|
blanchet@38836
|
470 |
(0 upto last) ts
|
blanchet@38836
|
471 |
end
|
blanchet@38506
|
472 |
|
blanchet@43552
|
473 |
(** Finite and infinite type inference **)
|
blanchet@43552
|
474 |
|
blanchet@43552
|
475 |
(* Finite types such as "unit", "bool", "bool * bool", and "bool => bool" are
|
blanchet@43552
|
476 |
dangerous because their "exhaust" properties can easily lead to unsound ATP
|
blanchet@43552
|
477 |
proofs. On the other hand, all HOL infinite types can be given the same
|
blanchet@43552
|
478 |
models in first-order logic (via Löwenheim-Skolem). *)
|
blanchet@43552
|
479 |
|
blanchet@43552
|
480 |
fun datatype_constrs thy (T as Type (s, Ts)) =
|
blanchet@43552
|
481 |
(case Datatype.get_info thy s of
|
blanchet@43552
|
482 |
SOME {index, descr, ...} =>
|
blanchet@43552
|
483 |
let val (_, dtyps, constrs) = AList.lookup (op =) descr index |> the in
|
blanchet@43552
|
484 |
map (apsnd (fn Us => map (typ_of_dtyp descr (dtyps ~~ Ts)) Us ---> T))
|
blanchet@43552
|
485 |
constrs
|
blanchet@43552
|
486 |
end
|
blanchet@43552
|
487 |
| NONE => [])
|
blanchet@43552
|
488 |
| datatype_constrs _ _ = []
|
blanchet@43552
|
489 |
|
blanchet@43552
|
490 |
(* Similar to "Nitpick_HOL.bounded_exact_card_of_type".
|
blanchet@43552
|
491 |
0 means infinite type, 1 means singleton type (e.g., "unit"), and 2 means
|
blanchet@43552
|
492 |
cardinality 2 or more. The specified default cardinality is returned if the
|
blanchet@43552
|
493 |
cardinality of the type can't be determined. *)
|
blanchet@43552
|
494 |
fun tiny_card_of_type ctxt default_card T =
|
blanchet@43552
|
495 |
let
|
blanchet@43552
|
496 |
val max = 2 (* 1 would be too small for the "fun" case *)
|
blanchet@43568
|
497 |
fun aux slack avoid T =
|
blanchet@43552
|
498 |
(if member (op =) avoid T then
|
blanchet@43552
|
499 |
0
|
blanchet@43552
|
500 |
else case T of
|
blanchet@43552
|
501 |
Type (@{type_name fun}, [T1, T2]) =>
|
blanchet@43568
|
502 |
(case (aux slack avoid T1, aux slack avoid T2) of
|
blanchet@43568
|
503 |
(k, 1) => if slack andalso k = 0 then 0 else 1
|
blanchet@43552
|
504 |
| (0, _) => 0
|
blanchet@43552
|
505 |
| (_, 0) => 0
|
blanchet@43552
|
506 |
| (k1, k2) =>
|
blanchet@43552
|
507 |
if k1 >= max orelse k2 >= max then max
|
blanchet@43552
|
508 |
else Int.min (max, Integer.pow k2 k1))
|
blanchet@43552
|
509 |
| @{typ bool} => 2 (* optimization *)
|
blanchet@43567
|
510 |
| @{typ nat} => 0 (* optimization *)
|
blanchet@43567
|
511 |
| @{typ int} => 0 (* optimization *)
|
blanchet@43567
|
512 |
| Type (s, _) =>
|
blanchet@43552
|
513 |
let val thy = Proof_Context.theory_of ctxt in
|
blanchet@43552
|
514 |
case datatype_constrs thy T of
|
blanchet@43567
|
515 |
constrs as _ :: _ =>
|
blanchet@43552
|
516 |
let
|
blanchet@43552
|
517 |
val constr_cards =
|
blanchet@43568
|
518 |
map (Integer.prod o map (aux slack (T :: avoid)) o binder_types
|
blanchet@43552
|
519 |
o snd) constrs
|
blanchet@43552
|
520 |
in
|
blanchet@43552
|
521 |
if exists (curry (op =) 0) constr_cards then 0
|
blanchet@43552
|
522 |
else Int.min (max, Integer.sum constr_cards)
|
blanchet@43552
|
523 |
end
|
blanchet@43567
|
524 |
| [] =>
|
blanchet@43567
|
525 |
case Typedef.get_info ctxt s of
|
blanchet@43567
|
526 |
({abs_type, rep_type, ...}, _) :: _ =>
|
blanchet@43567
|
527 |
(* We cheat here by assuming that typedef types are infinite if
|
blanchet@43567
|
528 |
their underlying type is infinite. This is unsound in general
|
blanchet@43567
|
529 |
but it's hard to think of a realistic example where this would
|
blanchet@43568
|
530 |
not be the case. We are also slack with representation types:
|
blanchet@43571
|
531 |
If a representation type has the form "sigma => tau", we
|
blanchet@43571
|
532 |
consider it enough to check "sigma" for infiniteness. (Look
|
blanchet@43571
|
533 |
for "slack" in this function.) *)
|
blanchet@43567
|
534 |
(case varify_and_instantiate_type ctxt
|
blanchet@43567
|
535 |
(Logic.varifyT_global abs_type) T
|
blanchet@43567
|
536 |
(Logic.varifyT_global rep_type)
|
blanchet@43568
|
537 |
|> aux true avoid of
|
blanchet@43567
|
538 |
0 => 0
|
blanchet@43567
|
539 |
| 1 => 1
|
blanchet@43567
|
540 |
| _ => default_card)
|
blanchet@43567
|
541 |
| [] => default_card
|
blanchet@43552
|
542 |
end
|
blanchet@43568
|
543 |
| TFree _ =>
|
blanchet@43568
|
544 |
(* Very slightly unsound: Type variables are assumed not to be
|
blanchet@43571
|
545 |
constrained to cardinality 1. (In practice, the user would most
|
blanchet@43571
|
546 |
likely have used "unit" directly anyway.) *)
|
blanchet@43568
|
547 |
if default_card = 1 then 2 else default_card
|
blanchet@43552
|
548 |
| _ => default_card)
|
blanchet@43568
|
549 |
in Int.min (max, aux false [] T) end
|
blanchet@43552
|
550 |
|
blanchet@43552
|
551 |
fun is_type_surely_finite ctxt T = tiny_card_of_type ctxt 0 T <> 0
|
blanchet@43552
|
552 |
fun is_type_surely_infinite ctxt T = tiny_card_of_type ctxt 1 T = 0
|
blanchet@43552
|
553 |
|
blanchet@43552
|
554 |
fun should_encode_type _ _ All_Types _ = true
|
blanchet@43552
|
555 |
| should_encode_type ctxt _ Finite_Types T = is_type_surely_finite ctxt T
|
blanchet@43552
|
556 |
| should_encode_type _ nonmono_Ts Nonmonotonic_Types T =
|
blanchet@43552
|
557 |
exists (curry Type.raw_instance T) nonmono_Ts
|
blanchet@43552
|
558 |
| should_encode_type _ _ _ _ = false
|
blanchet@43552
|
559 |
|
blanchet@43552
|
560 |
fun should_predicate_on_type ctxt nonmono_Ts (Preds (_, level)) T =
|
blanchet@43552
|
561 |
should_encode_type ctxt nonmono_Ts level T
|
blanchet@43552
|
562 |
| should_predicate_on_type _ _ _ _ = false
|
blanchet@43552
|
563 |
|
blanchet@43552
|
564 |
fun should_tag_with_type ctxt nonmono_Ts (Tags (_, level)) T =
|
blanchet@43552
|
565 |
should_encode_type ctxt nonmono_Ts level T
|
blanchet@43552
|
566 |
| should_tag_with_type _ _ _ _ = false
|
blanchet@43552
|
567 |
|
blanchet@43552
|
568 |
val homo_infinite_T = @{typ ind} (* any infinite type *)
|
blanchet@43552
|
569 |
|
blanchet@43552
|
570 |
fun homogenized_type ctxt nonmono_Ts level T =
|
blanchet@43552
|
571 |
if should_encode_type ctxt nonmono_Ts level T then T else homo_infinite_T
|
blanchet@43552
|
572 |
|
blanchet@43444
|
573 |
(** "hBOOL" and "hAPP" **)
|
blanchet@41561
|
574 |
|
blanchet@43445
|
575 |
type sym_info =
|
blanchet@43434
|
576 |
{pred_sym : bool, min_ary : int, max_ary : int, typ : typ option}
|
blanchet@43434
|
577 |
|
blanchet@43445
|
578 |
fun add_combterm_syms_to_table explicit_apply =
|
blanchet@43429
|
579 |
let
|
blanchet@43429
|
580 |
fun aux top_level tm =
|
blanchet@43429
|
581 |
let val (head, args) = strip_combterm_comb tm in
|
blanchet@43429
|
582 |
(case head of
|
blanchet@43434
|
583 |
CombConst ((s, _), T, _) =>
|
blanchet@43429
|
584 |
if String.isPrefix bound_var_prefix s then
|
blanchet@43429
|
585 |
I
|
blanchet@43429
|
586 |
else
|
blanchet@43434
|
587 |
let val ary = length args in
|
blanchet@43429
|
588 |
Symtab.map_default
|
blanchet@43429
|
589 |
(s, {pred_sym = true,
|
blanchet@43434
|
590 |
min_ary = if explicit_apply then 0 else ary,
|
blanchet@43434
|
591 |
max_ary = 0, typ = SOME T})
|
blanchet@43434
|
592 |
(fn {pred_sym, min_ary, max_ary, typ} =>
|
blanchet@43429
|
593 |
{pred_sym = pred_sym andalso top_level,
|
blanchet@43434
|
594 |
min_ary = Int.min (ary, min_ary),
|
blanchet@43434
|
595 |
max_ary = Int.max (ary, max_ary),
|
blanchet@43434
|
596 |
typ = if typ = SOME T then typ else NONE})
|
blanchet@43429
|
597 |
end
|
blanchet@43429
|
598 |
| _ => I)
|
blanchet@43429
|
599 |
#> fold (aux false) args
|
blanchet@43429
|
600 |
end
|
blanchet@43429
|
601 |
in aux true end
|
blanchet@43545
|
602 |
fun add_fact_syms_to_table explicit_apply =
|
blanchet@43550
|
603 |
fact_lift (formula_fold true (K (add_combterm_syms_to_table explicit_apply)))
|
blanchet@38506
|
604 |
|
blanchet@43546
|
605 |
val default_sym_table_entries : (string * sym_info) list =
|
blanchet@43434
|
606 |
[("equal", {pred_sym = true, min_ary = 2, max_ary = 2, typ = NONE}),
|
blanchet@43439
|
607 |
(make_fixed_const predicator_base,
|
blanchet@43434
|
608 |
{pred_sym = true, min_ary = 1, max_ary = 1, typ = NONE})] @
|
blanchet@43439
|
609 |
([tptp_false, tptp_true]
|
blanchet@43434
|
610 |
|> map (rpair {pred_sym = true, min_ary = 0, max_ary = 0, typ = NONE}))
|
blanchet@41388
|
611 |
|
blanchet@43415
|
612 |
fun sym_table_for_facts explicit_apply facts =
|
blanchet@43439
|
613 |
Symtab.empty |> fold Symtab.default default_sym_table_entries
|
blanchet@43445
|
614 |
|> fold (add_fact_syms_to_table explicit_apply) facts
|
blanchet@38506
|
615 |
|
blanchet@43429
|
616 |
fun min_arity_of sym_tab s =
|
blanchet@43429
|
617 |
case Symtab.lookup sym_tab s of
|
blanchet@43445
|
618 |
SOME ({min_ary, ...} : sym_info) => min_ary
|
blanchet@43429
|
619 |
| NONE =>
|
blanchet@43429
|
620 |
case strip_prefix_and_unascii const_prefix s of
|
blanchet@43418
|
621 |
SOME s =>
|
blanchet@43441
|
622 |
let val s = s |> unmangled_const_name |> invert_const in
|
blanchet@43439
|
623 |
if s = predicator_base then 1
|
blanchet@43418
|
624 |
else if s = explicit_app_base then 2
|
blanchet@43418
|
625 |
else if s = type_pred_base then 1
|
blanchet@43428
|
626 |
else 0
|
blanchet@43418
|
627 |
end
|
blanchet@38506
|
628 |
| NONE => 0
|
blanchet@38506
|
629 |
|
blanchet@38506
|
630 |
(* True if the constant ever appears outside of the top-level position in
|
blanchet@38506
|
631 |
literals, or if it appears with different arities (e.g., because of different
|
blanchet@38506
|
632 |
type instantiations). If false, the constant always receives all of its
|
blanchet@38506
|
633 |
arguments and is used as a predicate. *)
|
blanchet@43429
|
634 |
fun is_pred_sym sym_tab s =
|
blanchet@43429
|
635 |
case Symtab.lookup sym_tab s of
|
blanchet@43445
|
636 |
SOME ({pred_sym, min_ary, max_ary, ...} : sym_info) =>
|
blanchet@43445
|
637 |
pred_sym andalso min_ary = max_ary
|
blanchet@43429
|
638 |
| NONE => false
|
blanchet@38506
|
639 |
|
blanchet@43439
|
640 |
val predicator_combconst =
|
blanchet@43439
|
641 |
CombConst (`make_fixed_const predicator_base, @{typ "bool => bool"}, [])
|
blanchet@43439
|
642 |
fun predicator tm = CombApp (predicator_combconst, tm)
|
blanchet@38506
|
643 |
|
blanchet@43439
|
644 |
fun introduce_predicators_in_combterm sym_tab tm =
|
blanchet@43413
|
645 |
case strip_combterm_comb tm of
|
blanchet@43413
|
646 |
(CombConst ((s, _), _, _), _) =>
|
blanchet@43439
|
647 |
if is_pred_sym sym_tab s then tm else predicator tm
|
blanchet@43439
|
648 |
| _ => predicator tm
|
blanchet@38506
|
649 |
|
blanchet@43415
|
650 |
fun list_app head args = fold (curry (CombApp o swap)) args head
|
blanchet@38506
|
651 |
|
blanchet@43415
|
652 |
fun explicit_app arg head =
|
blanchet@43415
|
653 |
let
|
blanchet@43433
|
654 |
val head_T = combtyp_of head
|
blanchet@43563
|
655 |
val (arg_T, res_T) = dest_funT head_T
|
blanchet@43415
|
656 |
val explicit_app =
|
blanchet@43433
|
657 |
CombConst (`make_fixed_const explicit_app_base, head_T --> head_T,
|
blanchet@43563
|
658 |
[arg_T, res_T])
|
blanchet@43415
|
659 |
in list_app explicit_app [head, arg] end
|
blanchet@43415
|
660 |
fun list_explicit_app head args = fold explicit_app args head
|
blanchet@43415
|
661 |
|
blanchet@43436
|
662 |
fun introduce_explicit_apps_in_combterm sym_tab =
|
blanchet@43415
|
663 |
let
|
blanchet@43415
|
664 |
fun aux tm =
|
blanchet@43415
|
665 |
case strip_combterm_comb tm of
|
blanchet@43415
|
666 |
(head as CombConst ((s, _), _, _), args) =>
|
blanchet@43415
|
667 |
args |> map aux
|
blanchet@43428
|
668 |
|> chop (min_arity_of sym_tab s)
|
blanchet@43415
|
669 |
|>> list_app head
|
blanchet@43415
|
670 |
|-> list_explicit_app
|
blanchet@43415
|
671 |
| (head, args) => list_explicit_app head (map aux args)
|
blanchet@43415
|
672 |
in aux end
|
blanchet@43415
|
673 |
|
blanchet@43571
|
674 |
fun impose_type_arg_policy_in_combterm ctxt nonmono_Ts type_sys =
|
blanchet@43444
|
675 |
let
|
blanchet@43444
|
676 |
fun aux (CombApp tmp) = CombApp (pairself aux tmp)
|
blanchet@43445
|
677 |
| aux (CombConst (name as (s, _), T, T_args)) =
|
blanchet@43571
|
678 |
let
|
blanchet@43571
|
679 |
val level = level_of_type_sys type_sys
|
blanchet@43571
|
680 |
val (T, T_args) =
|
blanchet@43571
|
681 |
(* Aggressively merge most "hAPPs" if the type system is unsound
|
blanchet@43571
|
682 |
anyway, by distinguishing overloads only on the homogenized
|
blanchet@43571
|
683 |
result type. *)
|
blanchet@43571
|
684 |
if s = const_prefix ^ explicit_app_base andalso
|
blanchet@43591
|
685 |
length T_args = 2 andalso
|
blanchet@43571
|
686 |
not (is_type_sys_virtually_sound type_sys) then
|
blanchet@43571
|
687 |
T_args |> map (homogenized_type ctxt nonmono_Ts level)
|
blanchet@43571
|
688 |
|> (fn Ts => let val T = hd Ts --> nth Ts 1 in
|
blanchet@43571
|
689 |
(T --> T, tl Ts)
|
blanchet@43571
|
690 |
end)
|
blanchet@43571
|
691 |
else
|
blanchet@43571
|
692 |
(T, T_args)
|
blanchet@43571
|
693 |
in
|
blanchet@43571
|
694 |
(case strip_prefix_and_unascii const_prefix s of
|
blanchet@43571
|
695 |
NONE => (name, T_args)
|
blanchet@43571
|
696 |
| SOME s'' =>
|
blanchet@43571
|
697 |
let val s'' = invert_const s'' in
|
blanchet@43571
|
698 |
case type_arg_policy type_sys s'' of
|
blanchet@43571
|
699 |
No_Type_Args => (name, [])
|
blanchet@43571
|
700 |
| Explicit_Type_Args => (name, T_args)
|
blanchet@43571
|
701 |
| Mangled_Type_Args => (mangled_const_name T_args name, [])
|
blanchet@43571
|
702 |
end)
|
blanchet@43571
|
703 |
|> (fn (name, T_args) => CombConst (name, T, T_args))
|
blanchet@43571
|
704 |
end
|
blanchet@43444
|
705 |
| aux tm = tm
|
blanchet@43444
|
706 |
in aux end
|
blanchet@43444
|
707 |
|
blanchet@43571
|
708 |
fun repair_combterm ctxt nonmono_Ts type_sys sym_tab =
|
blanchet@43436
|
709 |
introduce_explicit_apps_in_combterm sym_tab
|
blanchet@43439
|
710 |
#> introduce_predicators_in_combterm sym_tab
|
blanchet@43571
|
711 |
#> impose_type_arg_policy_in_combterm ctxt nonmono_Ts type_sys
|
blanchet@43571
|
712 |
fun repair_fact ctxt nonmono_Ts type_sys sym_tab =
|
blanchet@43571
|
713 |
update_combformula (formula_map
|
blanchet@43571
|
714 |
(repair_combterm ctxt nonmono_Ts type_sys sym_tab))
|
blanchet@43444
|
715 |
|
blanchet@43444
|
716 |
(** Helper facts **)
|
blanchet@43444
|
717 |
|
blanchet@43444
|
718 |
fun ti_ti_helper_fact () =
|
blanchet@43444
|
719 |
let
|
blanchet@43444
|
720 |
fun var s = ATerm (`I s, [])
|
blanchet@43460
|
721 |
fun tag tm = ATerm (`make_fixed_const type_tag_name, [var "X", tm])
|
blanchet@43444
|
722 |
in
|
blanchet@43483
|
723 |
Formula (helper_prefix ^ "ti_ti", Axiom,
|
blanchet@43444
|
724 |
AAtom (ATerm (`I "equal", [tag (tag (var "Y")), tag (var "Y")]))
|
blanchet@43444
|
725 |
|> close_formula_universally, NONE, NONE)
|
blanchet@43444
|
726 |
end
|
blanchet@43444
|
727 |
|
blanchet@43445
|
728 |
fun helper_facts_for_sym ctxt type_sys (s, {typ, ...} : sym_info) =
|
blanchet@43444
|
729 |
case strip_prefix_and_unascii const_prefix s of
|
blanchet@43444
|
730 |
SOME mangled_s =>
|
blanchet@43444
|
731 |
let
|
blanchet@43444
|
732 |
val thy = Proof_Context.theory_of ctxt
|
blanchet@43444
|
733 |
val unmangled_s = mangled_s |> unmangled_const_name
|
blanchet@43450
|
734 |
fun dub_and_inst c needs_some_types (th, j) =
|
blanchet@43450
|
735 |
((c ^ "_" ^ string_of_int j ^ (if needs_some_types then "T" else ""),
|
blanchet@43511
|
736 |
Chained),
|
blanchet@43444
|
737 |
let val t = th |> prop_of in
|
blanchet@43460
|
738 |
t |> (general_type_arg_policy type_sys = Mangled_Type_Args andalso
|
blanchet@43444
|
739 |
not (null (Term.hidden_polymorphism t)))
|
blanchet@43444
|
740 |
? (case typ of
|
blanchet@43444
|
741 |
SOME T => specialize_type thy (invert_const unmangled_s, T)
|
blanchet@43444
|
742 |
| NONE => I)
|
blanchet@43444
|
743 |
end)
|
blanchet@43444
|
744 |
fun make_facts eq_as_iff =
|
blanchet@43444
|
745 |
map_filter (make_fact ctxt false eq_as_iff false)
|
blanchet@43460
|
746 |
val has_some_types = is_type_sys_fairly_sound type_sys
|
blanchet@43444
|
747 |
in
|
blanchet@43444
|
748 |
metis_helpers
|
blanchet@43450
|
749 |
|> maps (fn (metis_s, (needs_some_types, ths)) =>
|
blanchet@43444
|
750 |
if metis_s <> unmangled_s orelse
|
blanchet@43460
|
751 |
(needs_some_types andalso not has_some_types) then
|
blanchet@43444
|
752 |
[]
|
blanchet@43444
|
753 |
else
|
blanchet@43444
|
754 |
ths ~~ (1 upto length ths)
|
blanchet@43450
|
755 |
|> map (dub_and_inst mangled_s needs_some_types)
|
blanchet@43450
|
756 |
|> make_facts (not needs_some_types))
|
blanchet@43444
|
757 |
end
|
blanchet@43444
|
758 |
| NONE => []
|
blanchet@43444
|
759 |
fun helper_facts_for_sym_table ctxt type_sys sym_tab =
|
blanchet@43444
|
760 |
Symtab.fold_rev (append o helper_facts_for_sym ctxt type_sys) sym_tab []
|
blanchet@43444
|
761 |
|
blanchet@43444
|
762 |
fun translate_atp_fact ctxt keep_trivial =
|
blanchet@43444
|
763 |
`(make_fact ctxt keep_trivial true true o apsnd prop_of)
|
blanchet@43444
|
764 |
|
blanchet@43580
|
765 |
fun translate_formulas ctxt prem_kind type_sys hyp_ts concl_t rich_facts =
|
blanchet@43444
|
766 |
let
|
blanchet@43444
|
767 |
val thy = Proof_Context.theory_of ctxt
|
blanchet@43444
|
768 |
val fact_ts = map (prop_of o snd o snd) rich_facts
|
blanchet@43444
|
769 |
val (facts, fact_names) =
|
blanchet@43444
|
770 |
rich_facts
|
blanchet@43444
|
771 |
|> map_filter (fn (NONE, _) => NONE
|
blanchet@43444
|
772 |
| (SOME fact, (name, _)) => SOME (fact, name))
|
blanchet@43444
|
773 |
|> ListPair.unzip
|
blanchet@43444
|
774 |
(* Remove existing facts from the conjecture, as this can dramatically
|
blanchet@43444
|
775 |
boost an ATP's performance (for some reason). *)
|
blanchet@43444
|
776 |
val hyp_ts = hyp_ts |> filter_out (member (op aconv) fact_ts)
|
blanchet@43444
|
777 |
val goal_t = Logic.list_implies (hyp_ts, concl_t)
|
blanchet@43444
|
778 |
val all_ts = goal_t :: fact_ts
|
blanchet@43444
|
779 |
val subs = tfree_classes_of_terms all_ts
|
blanchet@43444
|
780 |
val supers = tvar_classes_of_terms all_ts
|
blanchet@43444
|
781 |
val tycons = type_consts_of_terms thy all_ts
|
blanchet@43580
|
782 |
val conjs = make_conjecture ctxt prem_kind (hyp_ts @ [concl_t])
|
blanchet@43444
|
783 |
val (supers', arity_clauses) =
|
blanchet@43460
|
784 |
if level_of_type_sys type_sys = No_Types then ([], [])
|
blanchet@43444
|
785 |
else make_arity_clauses thy tycons supers
|
blanchet@43444
|
786 |
val class_rel_clauses = make_class_rel_clauses thy subs supers'
|
blanchet@43444
|
787 |
in
|
blanchet@43444
|
788 |
(fact_names |> map single, (conjs, facts, class_rel_clauses, arity_clauses))
|
blanchet@43444
|
789 |
end
|
blanchet@43444
|
790 |
|
blanchet@43444
|
791 |
fun fo_literal_from_type_literal (TyLitVar (class, name)) =
|
blanchet@43444
|
792 |
(true, ATerm (class, [ATerm (name, [])]))
|
blanchet@43444
|
793 |
| fo_literal_from_type_literal (TyLitFree (class, name)) =
|
blanchet@43444
|
794 |
(true, ATerm (class, [ATerm (name, [])]))
|
blanchet@43444
|
795 |
|
blanchet@43444
|
796 |
fun formula_from_fo_literal (pos, t) = AAtom t |> not pos ? mk_anot
|
blanchet@43444
|
797 |
|
blanchet@43571
|
798 |
fun type_pred_combatom ctxt nonmono_Ts type_sys T tm =
|
blanchet@43444
|
799 |
CombApp (CombConst (`make_fixed_const type_pred_base, T --> @{typ bool}, [T]),
|
blanchet@43444
|
800 |
tm)
|
blanchet@43571
|
801 |
|> impose_type_arg_policy_in_combterm ctxt nonmono_Ts type_sys
|
blanchet@43444
|
802 |
|> AAtom
|
blanchet@43444
|
803 |
|
blanchet@43550
|
804 |
fun formula_from_combformula ctxt nonmono_Ts type_sys =
|
blanchet@43444
|
805 |
let
|
blanchet@43460
|
806 |
fun tag_with_type type_sys T tm =
|
blanchet@43460
|
807 |
CombConst (`make_fixed_const type_tag_name, T --> T, [T])
|
blanchet@43571
|
808 |
|> impose_type_arg_policy_in_combterm ctxt nonmono_Ts type_sys
|
blanchet@43460
|
809 |
|> do_term true
|
blanchet@43460
|
810 |
|> (fn ATerm (s, tms) => ATerm (s, tms @ [tm]))
|
blanchet@43460
|
811 |
and do_term top_level u =
|
blanchet@43444
|
812 |
let
|
blanchet@43444
|
813 |
val (head, args) = strip_combterm_comb u
|
blanchet@43445
|
814 |
val (x, T_args) =
|
blanchet@43444
|
815 |
case head of
|
blanchet@43445
|
816 |
CombConst (name, _, T_args) => (name, T_args)
|
blanchet@43444
|
817 |
| CombVar (name, _) => (name, [])
|
blanchet@43444
|
818 |
| CombApp _ => raise Fail "impossible \"CombApp\""
|
blanchet@43445
|
819 |
val t = ATerm (x, map fo_term_from_typ T_args @
|
blanchet@43444
|
820 |
map (do_term false) args)
|
blanchet@43445
|
821 |
val T = combtyp_of u
|
blanchet@43444
|
822 |
in
|
blanchet@43550
|
823 |
t |> (if not top_level andalso
|
blanchet@43550
|
824 |
should_tag_with_type ctxt nonmono_Ts type_sys T then
|
blanchet@43460
|
825 |
tag_with_type type_sys T
|
blanchet@43444
|
826 |
else
|
blanchet@43444
|
827 |
I)
|
blanchet@43444
|
828 |
end
|
blanchet@43444
|
829 |
val do_bound_type =
|
blanchet@43552
|
830 |
case type_sys of
|
blanchet@43587
|
831 |
Simple_Types level =>
|
blanchet@43552
|
832 |
SOME o mangled_type_name o homogenized_type ctxt nonmono_Ts level
|
blanchet@43552
|
833 |
| _ => K NONE
|
blanchet@43444
|
834 |
fun do_out_of_bound_type (s, T) =
|
blanchet@43550
|
835 |
if should_predicate_on_type ctxt nonmono_Ts type_sys T then
|
blanchet@43571
|
836 |
type_pred_combatom ctxt nonmono_Ts type_sys T (CombVar (s, T))
|
blanchet@43444
|
837 |
|> do_formula |> SOME
|
blanchet@43444
|
838 |
else
|
blanchet@43444
|
839 |
NONE
|
blanchet@43444
|
840 |
and do_formula (AQuant (q, xs, phi)) =
|
blanchet@43444
|
841 |
AQuant (q, xs |> map (apsnd (fn NONE => NONE
|
blanchet@43445
|
842 |
| SOME T => do_bound_type T)),
|
blanchet@43444
|
843 |
(if q = AForall then mk_ahorn else fold_rev (mk_aconn AAnd))
|
blanchet@43444
|
844 |
(map_filter
|
blanchet@43444
|
845 |
(fn (_, NONE) => NONE
|
blanchet@43445
|
846 |
| (s, SOME T) => do_out_of_bound_type (s, T)) xs)
|
blanchet@43444
|
847 |
(do_formula phi))
|
blanchet@43444
|
848 |
| do_formula (AConn (c, phis)) = AConn (c, map do_formula phis)
|
blanchet@43444
|
849 |
| do_formula (AAtom tm) = AAtom (do_term true tm)
|
blanchet@43444
|
850 |
in do_formula end
|
blanchet@43444
|
851 |
|
blanchet@43592
|
852 |
fun bound_atomic_types type_sys Ts =
|
blanchet@43592
|
853 |
mk_ahorn (map (formula_from_fo_literal o fo_literal_from_type_literal)
|
blanchet@43592
|
854 |
(atp_type_literals_for_types type_sys Axiom Ts))
|
blanchet@43592
|
855 |
|
blanchet@43550
|
856 |
fun formula_for_fact ctxt nonmono_Ts type_sys
|
blanchet@43444
|
857 |
({combformula, atomic_types, ...} : translated_formula) =
|
blanchet@43592
|
858 |
combformula
|
blanchet@43592
|
859 |
|> close_combformula_universally
|
blanchet@43592
|
860 |
|> formula_from_combformula ctxt nonmono_Ts type_sys
|
blanchet@43592
|
861 |
|> bound_atomic_types type_sys atomic_types
|
blanchet@43444
|
862 |
|> close_formula_universally
|
blanchet@43444
|
863 |
|
blanchet@43511
|
864 |
fun useful_isabelle_info s = SOME (ATerm ("[]", [ATerm ("isabelle_" ^ s, [])]))
|
blanchet@43511
|
865 |
|
blanchet@43444
|
866 |
(* Each fact is given a unique fact number to avoid name clashes (e.g., because
|
blanchet@43444
|
867 |
of monomorphization). The TPTP explicitly forbids name clashes, and some of
|
blanchet@43444
|
868 |
the remote provers might care. *)
|
blanchet@43550
|
869 |
fun formula_line_for_fact ctxt prefix nonmono_Ts type_sys
|
blanchet@43511
|
870 |
(j, formula as {name, locality, kind, ...}) =
|
blanchet@43550
|
871 |
Formula (prefix ^ (if polymorphism_of_type_sys type_sys = Polymorphic then ""
|
blanchet@43550
|
872 |
else string_of_int j ^ "_") ^
|
blanchet@43518
|
873 |
ascii_of name,
|
blanchet@43550
|
874 |
kind, formula_for_fact ctxt nonmono_Ts type_sys formula, NONE,
|
blanchet@43511
|
875 |
if generate_useful_info then
|
blanchet@43511
|
876 |
case locality of
|
blanchet@43511
|
877 |
Intro => useful_isabelle_info "intro"
|
blanchet@43511
|
878 |
| Elim => useful_isabelle_info "elim"
|
blanchet@43511
|
879 |
| Simp => useful_isabelle_info "simp"
|
blanchet@43511
|
880 |
| _ => NONE
|
blanchet@43511
|
881 |
else
|
blanchet@43511
|
882 |
NONE)
|
blanchet@43444
|
883 |
|
blanchet@43444
|
884 |
fun formula_line_for_class_rel_clause (ClassRelClause {name, subclass,
|
blanchet@43444
|
885 |
superclass, ...}) =
|
blanchet@43444
|
886 |
let val ty_arg = ATerm (`I "T", []) in
|
blanchet@43448
|
887 |
Formula (class_rel_clause_prefix ^ ascii_of name, Axiom,
|
blanchet@43444
|
888 |
AConn (AImplies, [AAtom (ATerm (subclass, [ty_arg])),
|
blanchet@43444
|
889 |
AAtom (ATerm (superclass, [ty_arg]))])
|
blanchet@43444
|
890 |
|> close_formula_universally, NONE, NONE)
|
blanchet@43444
|
891 |
end
|
blanchet@43444
|
892 |
|
blanchet@43444
|
893 |
fun fo_literal_from_arity_literal (TConsLit (c, t, args)) =
|
blanchet@43444
|
894 |
(true, ATerm (c, [ATerm (t, map (fn arg => ATerm (arg, [])) args)]))
|
blanchet@43444
|
895 |
| fo_literal_from_arity_literal (TVarLit (c, sort)) =
|
blanchet@43444
|
896 |
(false, ATerm (c, [ATerm (sort, [])]))
|
blanchet@43444
|
897 |
|
blanchet@43444
|
898 |
fun formula_line_for_arity_clause (ArityClause {name, conclLit, premLits,
|
blanchet@43444
|
899 |
...}) =
|
blanchet@43448
|
900 |
Formula (arity_clause_prefix ^ ascii_of name, Axiom,
|
blanchet@43444
|
901 |
mk_ahorn (map (formula_from_fo_literal o apfst not
|
blanchet@43444
|
902 |
o fo_literal_from_arity_literal) premLits)
|
blanchet@43444
|
903 |
(formula_from_fo_literal
|
blanchet@43444
|
904 |
(fo_literal_from_arity_literal conclLit))
|
blanchet@43444
|
905 |
|> close_formula_universally, NONE, NONE)
|
blanchet@43444
|
906 |
|
blanchet@43550
|
907 |
fun formula_line_for_conjecture ctxt nonmono_Ts type_sys
|
blanchet@43444
|
908 |
({name, kind, combformula, ...} : translated_formula) =
|
blanchet@43448
|
909 |
Formula (conjecture_prefix ^ name, kind,
|
blanchet@43550
|
910 |
formula_from_combformula ctxt nonmono_Ts type_sys
|
blanchet@43444
|
911 |
(close_combformula_universally combformula)
|
blanchet@43444
|
912 |
|> close_formula_universally, NONE, NONE)
|
blanchet@43444
|
913 |
|
blanchet@43444
|
914 |
fun free_type_literals type_sys ({atomic_types, ...} : translated_formula) =
|
blanchet@43444
|
915 |
atomic_types |> atp_type_literals_for_types type_sys Conjecture
|
blanchet@43444
|
916 |
|> map fo_literal_from_type_literal
|
blanchet@43444
|
917 |
|
blanchet@43444
|
918 |
fun formula_line_for_free_type j lit =
|
blanchet@43448
|
919 |
Formula (tfree_prefix ^ string_of_int j, Hypothesis,
|
blanchet@43444
|
920 |
formula_from_fo_literal lit, NONE, NONE)
|
blanchet@43444
|
921 |
fun formula_lines_for_free_types type_sys facts =
|
blanchet@43444
|
922 |
let
|
blanchet@43444
|
923 |
val litss = map (free_type_literals type_sys) facts
|
blanchet@43444
|
924 |
val lits = fold (union (op =)) litss []
|
blanchet@43444
|
925 |
in map2 formula_line_for_free_type (0 upto length lits - 1) lits end
|
blanchet@43444
|
926 |
|
blanchet@43444
|
927 |
(** Symbol declarations **)
|
blanchet@43415
|
928 |
|
blanchet@43547
|
929 |
fun insert_type get_T x xs =
|
blanchet@43547
|
930 |
let val T = get_T x in
|
blanchet@43547
|
931 |
if exists (curry Type.raw_instance T o get_T) xs then xs
|
blanchet@43547
|
932 |
else x :: filter_out ((fn T' => Type.raw_instance (T', T)) o get_T) xs
|
blanchet@43547
|
933 |
end
|
blanchet@43547
|
934 |
|
blanchet@43445
|
935 |
fun should_declare_sym type_sys pred_sym s =
|
blanchet@43413
|
936 |
not (String.isPrefix bound_var_prefix s) andalso s <> "equal" andalso
|
blanchet@43516
|
937 |
not (String.isPrefix "$" s) andalso
|
blanchet@43587
|
938 |
((case type_sys of Simple_Types _ => true | _ => false) orelse not pred_sym)
|
blanchet@43413
|
939 |
|
blanchet@43568
|
940 |
fun sym_decl_table_for_facts type_sys repaired_sym_tab (conjs, facts) =
|
blanchet@43445
|
941 |
let
|
blanchet@43568
|
942 |
fun add_combterm in_conj tm =
|
blanchet@43445
|
943 |
let val (head, args) = strip_combterm_comb tm in
|
blanchet@43445
|
944 |
(case head of
|
blanchet@43445
|
945 |
CombConst ((s, s'), T, T_args) =>
|
blanchet@43445
|
946 |
let val pred_sym = is_pred_sym repaired_sym_tab s in
|
blanchet@43445
|
947 |
if should_declare_sym type_sys pred_sym s then
|
blanchet@43447
|
948 |
Symtab.map_default (s, [])
|
blanchet@43568
|
949 |
(insert_type #3 (s', T_args, T, pred_sym, length args,
|
blanchet@43568
|
950 |
in_conj))
|
blanchet@43445
|
951 |
else
|
blanchet@43445
|
952 |
I
|
blanchet@43445
|
953 |
end
|
blanchet@43445
|
954 |
| _ => I)
|
blanchet@43568
|
955 |
#> fold (add_combterm in_conj) args
|
blanchet@43445
|
956 |
end
|
blanchet@43568
|
957 |
fun add_fact in_conj =
|
blanchet@43568
|
958 |
fact_lift (formula_fold true (K (add_combterm in_conj)))
|
blanchet@43568
|
959 |
in
|
blanchet@43568
|
960 |
Symtab.empty
|
blanchet@43568
|
961 |
|> is_type_sys_fairly_sound type_sys
|
blanchet@43568
|
962 |
? (fold (add_fact true) conjs #> fold (add_fact false) facts)
|
blanchet@43568
|
963 |
end
|
blanchet@43445
|
964 |
|
blanchet@43547
|
965 |
fun is_var_or_bound_var (CombConst ((s, _), _, _)) =
|
blanchet@43547
|
966 |
String.isPrefix bound_var_prefix s
|
blanchet@43547
|
967 |
| is_var_or_bound_var (CombVar _) = true
|
blanchet@43547
|
968 |
| is_var_or_bound_var _ = false
|
blanchet@43547
|
969 |
|
blanchet@43555
|
970 |
(* This inference is described in section 2.3 of Claessen et al.'s "Sorting it
|
blanchet@43555
|
971 |
out with monotonicity" paper presented at CADE 2011. *)
|
blanchet@43550
|
972 |
fun add_combterm_nonmonotonic_types _ (SOME false) _ = I
|
blanchet@43550
|
973 |
| add_combterm_nonmonotonic_types ctxt _
|
blanchet@43550
|
974 |
(CombApp (CombApp (CombConst (("equal", _), Type (_, [T, _]), _), tm1),
|
blanchet@43550
|
975 |
tm2)) =
|
blanchet@43550
|
976 |
(exists is_var_or_bound_var [tm1, tm2] andalso
|
blanchet@43550
|
977 |
not (is_type_surely_infinite ctxt T)) ? insert_type I T
|
blanchet@43550
|
978 |
| add_combterm_nonmonotonic_types _ _ _ = I
|
blanchet@43550
|
979 |
fun add_fact_nonmonotonic_types ctxt ({kind, combformula, ...}
|
blanchet@43550
|
980 |
: translated_formula) =
|
blanchet@43550
|
981 |
formula_fold (kind <> Conjecture) (add_combterm_nonmonotonic_types ctxt)
|
blanchet@43550
|
982 |
combformula
|
blanchet@43550
|
983 |
fun add_nonmonotonic_types_for_facts ctxt type_sys facts =
|
blanchet@43550
|
984 |
level_of_type_sys type_sys = Nonmonotonic_Types
|
blanchet@43570
|
985 |
(* in case helper "True_or_False" is included (FIXME) *)
|
blanchet@43570
|
986 |
? (insert_type I @{typ bool}
|
blanchet@43552
|
987 |
#> fold (add_fact_nonmonotonic_types ctxt) facts)
|
blanchet@43547
|
988 |
|
blanchet@43445
|
989 |
fun n_ary_strip_type 0 T = ([], T)
|
blanchet@43445
|
990 |
| n_ary_strip_type n (Type (@{type_name fun}, [dom_T, ran_T])) =
|
blanchet@43445
|
991 |
n_ary_strip_type (n - 1) ran_T |>> cons dom_T
|
blanchet@43445
|
992 |
| n_ary_strip_type _ _ = raise Fail "unexpected non-function"
|
blanchet@43445
|
993 |
|
blanchet@43568
|
994 |
fun result_type_of_decl (_, _, T, _, ary, _) = n_ary_strip_type ary T |> snd
|
blanchet@43450
|
995 |
|
blanchet@43568
|
996 |
fun decl_line_for_sym s (s', _, T, pred_sym, ary, _) =
|
blanchet@43450
|
997 |
let val (arg_Ts, res_T) = n_ary_strip_type ary T in
|
blanchet@43483
|
998 |
Decl (sym_decl_prefix ^ s, (s, s'), map mangled_type_name arg_Ts,
|
blanchet@43450
|
999 |
if pred_sym then `I tptp_tff_bool_type else mangled_type_name res_T)
|
blanchet@43450
|
1000 |
end
|
blanchet@43450
|
1001 |
|
blanchet@43463
|
1002 |
fun is_polymorphic_type T = fold_atyps (fn TVar _ => K true | _ => I) T false
|
blanchet@43463
|
1003 |
|
blanchet@43580
|
1004 |
fun formula_line_for_sym_decl ctxt conj_sym_kind nonmono_Ts type_sys n s j
|
blanchet@43568
|
1005 |
(s', T_args, T, _, ary, in_conj) =
|
blanchet@43450
|
1006 |
let
|
blanchet@43580
|
1007 |
val (kind, maybe_negate) =
|
blanchet@43580
|
1008 |
if in_conj then (conj_sym_kind, conj_sym_kind = Conjecture ? mk_anot)
|
blanchet@43580
|
1009 |
else (Axiom, I)
|
blanchet@43450
|
1010 |
val (arg_Ts, res_T) = n_ary_strip_type ary T
|
blanchet@43450
|
1011 |
val bound_names =
|
blanchet@43450
|
1012 |
1 upto length arg_Ts |> map (`I o make_bound_var o string_of_int)
|
blanchet@43450
|
1013 |
val bound_tms =
|
blanchet@43450
|
1014 |
bound_names ~~ arg_Ts |> map (fn (name, T) => CombConst (name, T, []))
|
blanchet@43450
|
1015 |
val bound_Ts =
|
blanchet@43463
|
1016 |
arg_Ts |> map (fn T => if n > 1 orelse is_polymorphic_type T then SOME T
|
blanchet@43463
|
1017 |
else NONE)
|
blanchet@43450
|
1018 |
in
|
blanchet@43483
|
1019 |
Formula (sym_decl_prefix ^ s ^
|
blanchet@43580
|
1020 |
(if n > 1 then "_" ^ string_of_int j else ""), kind,
|
blanchet@43450
|
1021 |
CombConst ((s, s'), T, T_args)
|
blanchet@43450
|
1022 |
|> fold (curry (CombApp o swap)) bound_tms
|
blanchet@43571
|
1023 |
|> type_pred_combatom ctxt nonmono_Ts type_sys res_T
|
blanchet@43450
|
1024 |
|> mk_aquant AForall (bound_names ~~ bound_Ts)
|
blanchet@43550
|
1025 |
|> formula_from_combformula ctxt nonmono_Ts type_sys
|
blanchet@43592
|
1026 |
|> n > 1 ? bound_atomic_types type_sys (atyps_of T)
|
blanchet@43580
|
1027 |
|> close_formula_universally
|
blanchet@43580
|
1028 |
|> maybe_negate,
|
blanchet@43450
|
1029 |
NONE, NONE)
|
blanchet@43450
|
1030 |
end
|
blanchet@43450
|
1031 |
|
blanchet@43580
|
1032 |
fun problem_lines_for_sym_decls ctxt conj_sym_kind nonmono_Ts type_sys
|
blanchet@43580
|
1033 |
(s, decls) =
|
blanchet@43552
|
1034 |
case type_sys of
|
blanchet@43587
|
1035 |
Simple_Types _ => map (decl_line_for_sym s) decls
|
blanchet@43552
|
1036 |
| _ =>
|
blanchet@43445
|
1037 |
let
|
blanchet@43450
|
1038 |
val decls =
|
blanchet@43450
|
1039 |
case decls of
|
blanchet@43450
|
1040 |
decl :: (decls' as _ :: _) =>
|
blanchet@43463
|
1041 |
let val T = result_type_of_decl decl in
|
blanchet@43463
|
1042 |
if forall ((fn T' => Type.raw_instance (T', T))
|
blanchet@43463
|
1043 |
o result_type_of_decl) decls' then
|
blanchet@43463
|
1044 |
[decl]
|
blanchet@43463
|
1045 |
else
|
blanchet@43463
|
1046 |
decls
|
blanchet@43463
|
1047 |
end
|
blanchet@43450
|
1048 |
| _ => decls
|
blanchet@43450
|
1049 |
val n = length decls
|
blanchet@43450
|
1050 |
val decls =
|
blanchet@43550
|
1051 |
decls |> filter (should_predicate_on_type ctxt nonmono_Ts type_sys
|
blanchet@43450
|
1052 |
o result_type_of_decl)
|
blanchet@43445
|
1053 |
in
|
blanchet@43580
|
1054 |
(0 upto length decls - 1, decls)
|
blanchet@43580
|
1055 |
|-> map2 (formula_line_for_sym_decl ctxt conj_sym_kind nonmono_Ts type_sys
|
blanchet@43580
|
1056 |
n s)
|
blanchet@43445
|
1057 |
end
|
blanchet@43450
|
1058 |
|
blanchet@43580
|
1059 |
fun problem_lines_for_sym_decl_table ctxt conj_sym_kind nonmono_Ts type_sys
|
blanchet@43580
|
1060 |
sym_decl_tab =
|
blanchet@43580
|
1061 |
Symtab.fold_rev (append o problem_lines_for_sym_decls ctxt conj_sym_kind
|
blanchet@43580
|
1062 |
nonmono_Ts type_sys)
|
blanchet@43445
|
1063 |
sym_decl_tab []
|
blanchet@43410
|
1064 |
|
blanchet@43414
|
1065 |
fun add_tff_types_in_formula (AQuant (_, xs, phi)) =
|
blanchet@43414
|
1066 |
union (op =) (map_filter snd xs) #> add_tff_types_in_formula phi
|
blanchet@43414
|
1067 |
| add_tff_types_in_formula (AConn (_, phis)) =
|
blanchet@43414
|
1068 |
fold add_tff_types_in_formula phis
|
blanchet@43414
|
1069 |
| add_tff_types_in_formula (AAtom _) = I
|
blanchet@43414
|
1070 |
|
blanchet@43433
|
1071 |
fun add_tff_types_in_problem_line (Decl (_, _, arg_Ts, res_T)) =
|
blanchet@43433
|
1072 |
union (op =) (res_T :: arg_Ts)
|
blanchet@43448
|
1073 |
| add_tff_types_in_problem_line (Formula (_, _, phi, _, _)) =
|
blanchet@43414
|
1074 |
add_tff_types_in_formula phi
|
blanchet@43414
|
1075 |
|
blanchet@43414
|
1076 |
fun tff_types_in_problem problem =
|
blanchet@43414
|
1077 |
fold (fold add_tff_types_in_problem_line o snd) problem []
|
blanchet@43414
|
1078 |
|
blanchet@43416
|
1079 |
fun decl_line_for_tff_type (s, s') =
|
blanchet@43439
|
1080 |
Decl (type_decl_prefix ^ ascii_of s, (s, s'), [], `I tptp_tff_type_of_types)
|
blanchet@43414
|
1081 |
|
blanchet@43414
|
1082 |
val type_declsN = "Types"
|
blanchet@43415
|
1083 |
val sym_declsN = "Symbol types"
|
blanchet@41405
|
1084 |
val factsN = "Relevant facts"
|
blanchet@41405
|
1085 |
val class_relsN = "Class relationships"
|
blanchet@43414
|
1086 |
val aritiesN = "Arities"
|
blanchet@41405
|
1087 |
val helpersN = "Helper facts"
|
blanchet@41405
|
1088 |
val conjsN = "Conjectures"
|
blanchet@41561
|
1089 |
val free_typesN = "Type variables"
|
blanchet@41405
|
1090 |
|
blanchet@41405
|
1091 |
fun offset_of_heading_in_problem _ [] j = j
|
blanchet@41405
|
1092 |
| offset_of_heading_in_problem needle ((heading, lines) :: problem) j =
|
blanchet@41405
|
1093 |
if heading = needle then j
|
blanchet@41405
|
1094 |
else offset_of_heading_in_problem needle problem (j + length lines)
|
blanchet@41405
|
1095 |
|
blanchet@43580
|
1096 |
fun prepare_atp_problem ctxt conj_sym_kind prem_kind type_sys explicit_apply
|
blanchet@43580
|
1097 |
hyp_ts concl_t facts =
|
blanchet@38506
|
1098 |
let
|
blanchet@41561
|
1099 |
val (fact_names, (conjs, facts, class_rel_clauses, arity_clauses)) =
|
blanchet@43580
|
1100 |
translate_formulas ctxt prem_kind type_sys hyp_ts concl_t facts
|
blanchet@43434
|
1101 |
val sym_tab = conjs @ facts |> sym_table_for_facts explicit_apply
|
blanchet@43552
|
1102 |
val nonmono_Ts =
|
blanchet@43552
|
1103 |
[] |> fold (add_nonmonotonic_types_for_facts ctxt type_sys) [facts, conjs]
|
blanchet@43571
|
1104 |
val repair = repair_fact ctxt nonmono_Ts type_sys sym_tab
|
blanchet@43552
|
1105 |
val (conjs, facts) = (conjs, facts) |> pairself (map repair)
|
blanchet@43550
|
1106 |
val repaired_sym_tab = conjs @ facts |> sym_table_for_facts false
|
blanchet@43444
|
1107 |
val helpers =
|
blanchet@43552
|
1108 |
repaired_sym_tab |> helper_facts_for_sym_table ctxt type_sys |> map repair
|
blanchet@43550
|
1109 |
val sym_decl_lines =
|
blanchet@43568
|
1110 |
(conjs, facts) (* FIXME: what if "True_or_False" is among helpers? *)
|
blanchet@43550
|
1111 |
|> sym_decl_table_for_facts type_sys repaired_sym_tab
|
blanchet@43580
|
1112 |
|> problem_lines_for_sym_decl_table ctxt conj_sym_kind nonmono_Ts type_sys
|
blanchet@43393
|
1113 |
(* Reordering these might confuse the proof reconstruction code or the SPASS
|
blanchet@43393
|
1114 |
Flotter hack. *)
|
blanchet@38506
|
1115 |
val problem =
|
blanchet@43432
|
1116 |
[(sym_declsN, sym_decl_lines),
|
blanchet@43550
|
1117 |
(factsN, map (formula_line_for_fact ctxt fact_prefix nonmono_Ts type_sys)
|
blanchet@43051
|
1118 |
(0 upto length facts - 1 ~~ facts)),
|
blanchet@43416
|
1119 |
(class_relsN, map formula_line_for_class_rel_clause class_rel_clauses),
|
blanchet@43416
|
1120 |
(aritiesN, map formula_line_for_arity_clause arity_clauses),
|
blanchet@43550
|
1121 |
(helpersN, map (formula_line_for_fact ctxt helper_prefix nonmono_Ts
|
blanchet@43550
|
1122 |
type_sys)
|
blanchet@43434
|
1123 |
(0 upto length helpers - 1 ~~ helpers)
|
blanchet@43450
|
1124 |
|> (case type_sys of
|
blanchet@43460
|
1125 |
Tags (Polymorphic, level) =>
|
blanchet@43557
|
1126 |
is_type_level_partial level
|
blanchet@43460
|
1127 |
? cons (ti_ti_helper_fact ())
|
blanchet@43450
|
1128 |
| _ => I)),
|
blanchet@43550
|
1129 |
(conjsN, map (formula_line_for_conjecture ctxt nonmono_Ts type_sys)
|
blanchet@43550
|
1130 |
conjs),
|
blanchet@43416
|
1131 |
(free_typesN, formula_lines_for_free_types type_sys (facts @ conjs))]
|
blanchet@43414
|
1132 |
val problem =
|
blanchet@43432
|
1133 |
problem
|
blanchet@43552
|
1134 |
|> (case type_sys of
|
blanchet@43587
|
1135 |
Simple_Types _ =>
|
blanchet@43432
|
1136 |
cons (type_declsN,
|
blanchet@43432
|
1137 |
map decl_line_for_tff_type (tff_types_in_problem problem))
|
blanchet@43552
|
1138 |
| _ => I)
|
blanchet@43517
|
1139 |
val (problem, pool) =
|
blanchet@43517
|
1140 |
problem |> nice_atp_problem (Config.get ctxt readable_names)
|
blanchet@38506
|
1141 |
in
|
blanchet@38506
|
1142 |
(problem,
|
blanchet@38506
|
1143 |
case pool of SOME the_pool => snd the_pool | NONE => Symtab.empty,
|
blanchet@43456
|
1144 |
offset_of_heading_in_problem conjsN problem 0,
|
blanchet@43412
|
1145 |
offset_of_heading_in_problem factsN problem 0,
|
blanchet@41405
|
1146 |
fact_names |> Vector.fromList)
|
blanchet@38506
|
1147 |
end
|
blanchet@38506
|
1148 |
|
blanchet@41561
|
1149 |
(* FUDGE *)
|
blanchet@41561
|
1150 |
val conj_weight = 0.0
|
blanchet@42641
|
1151 |
val hyp_weight = 0.1
|
blanchet@42641
|
1152 |
val fact_min_weight = 0.2
|
blanchet@41561
|
1153 |
val fact_max_weight = 1.0
|
blanchet@43479
|
1154 |
val type_info_default_weight = 0.8
|
blanchet@41561
|
1155 |
|
blanchet@41561
|
1156 |
fun add_term_weights weight (ATerm (s, tms)) =
|
blanchet@41561
|
1157 |
(not (is_atp_variable s) andalso s <> "equal") ? Symtab.default (s, weight)
|
blanchet@41561
|
1158 |
#> fold (add_term_weights weight) tms
|
blanchet@43448
|
1159 |
fun add_problem_line_weights weight (Formula (_, _, phi, _, _)) =
|
blanchet@43550
|
1160 |
formula_fold true (K (add_term_weights weight)) phi
|
blanchet@43399
|
1161 |
| add_problem_line_weights _ _ = I
|
blanchet@41561
|
1162 |
|
blanchet@41561
|
1163 |
fun add_conjectures_weights [] = I
|
blanchet@41561
|
1164 |
| add_conjectures_weights conjs =
|
blanchet@41561
|
1165 |
let val (hyps, conj) = split_last conjs in
|
blanchet@41561
|
1166 |
add_problem_line_weights conj_weight conj
|
blanchet@41561
|
1167 |
#> fold (add_problem_line_weights hyp_weight) hyps
|
blanchet@41561
|
1168 |
end
|
blanchet@41561
|
1169 |
|
blanchet@41561
|
1170 |
fun add_facts_weights facts =
|
blanchet@41561
|
1171 |
let
|
blanchet@41561
|
1172 |
val num_facts = length facts
|
blanchet@41561
|
1173 |
fun weight_of j =
|
blanchet@41561
|
1174 |
fact_min_weight + (fact_max_weight - fact_min_weight) * Real.fromInt j
|
blanchet@41561
|
1175 |
/ Real.fromInt num_facts
|
blanchet@41561
|
1176 |
in
|
blanchet@41561
|
1177 |
map weight_of (0 upto num_facts - 1) ~~ facts
|
blanchet@41561
|
1178 |
|> fold (uncurry add_problem_line_weights)
|
blanchet@41561
|
1179 |
end
|
blanchet@41561
|
1180 |
|
blanchet@41561
|
1181 |
(* Weights are from 0.0 (most important) to 1.0 (least important). *)
|
blanchet@41561
|
1182 |
fun atp_problem_weights problem =
|
blanchet@43479
|
1183 |
let val get = these o AList.lookup (op =) problem in
|
blanchet@43479
|
1184 |
Symtab.empty
|
blanchet@43479
|
1185 |
|> add_conjectures_weights (get free_typesN @ get conjsN)
|
blanchet@43479
|
1186 |
|> add_facts_weights (get factsN)
|
blanchet@43479
|
1187 |
|> fold (fold (add_problem_line_weights type_info_default_weight) o get)
|
blanchet@43479
|
1188 |
[sym_declsN, class_relsN, aritiesN]
|
blanchet@43479
|
1189 |
|> Symtab.dest
|
blanchet@43479
|
1190 |
|> sort (prod_ord Real.compare string_ord o pairself swap)
|
blanchet@43479
|
1191 |
end
|
blanchet@41561
|
1192 |
|
blanchet@38506
|
1193 |
end;
|