1 (* Copyright (C) 2002, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
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9 * as published by the Free Software Foundation; either version 2
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
31 if debug then prerr_endline (Lazy.force s);;
34 let mk_irl ctx = CicMkImplicit.identity_relocation_list_for_metavariable ctx;;
35 let ugraph = CicUniv.oblivion_ugraph;;
36 let typeof = CicTypeChecker.type_of_aux';;
38 let names = List.map (function None -> None | Some (x,_) -> Some x) ctx in
42 let is_propositional context sort =
43 match CicReduction.whd context sort with
45 | Cic.Sort (Cic.CProp _) -> true
49 let is_in_prop context subst metasenv ty =
50 let sort,u = typeof ~subst metasenv context ty CicUniv.oblivion_ugraph in
51 is_propositional context sort
54 exception NotConvertible;;
56 let check_proof_is_valid proof metasenv context goalty =
60 let ty,u = typeof metasenv context proof CicUniv.oblivion_ugraph in
61 let b,_ = CicReduction.are_convertible context ty goalty u in
62 if not b then raise NotConvertible else b
65 List.map (function None -> None | Some (x,_) -> Some x) context
67 debug_print (lazy ("PROOF:" ^ CicPp.pp proof names));
68 (* debug_print (lazy ("PROOFTY:" ^ CicPp.pp ty names)); *)
69 debug_print (lazy ("GOAL:" ^ CicPp.pp goalty names));
70 debug_print (lazy ("MENV:" ^ CicMetaSubst.ppmetasenv [] metasenv));
76 let assert_proof_is_valid proof metasenv context goalty =
77 assert (check_proof_is_valid proof metasenv context goalty)
80 let assert_subst_are_disjoint subst subst' =
83 (fun (i,_) -> List.for_all (fun (j,_) -> i<>j) subst')
88 let split_goals_in_prop metasenv subst gl =
91 let _,context,ty = CicUtil.lookup_meta g metasenv in
93 let sort,u = typeof ~subst metasenv context ty ugraph in
94 is_propositional context sort
96 | CicTypeChecker.AssertFailure s
97 | CicTypeChecker.TypeCheckerFailure s ->
99 (lazy ("NON TIPA" ^ ppterm context (CicMetaSubst.apply_subst subst ty)));
102 (* FIXME... they should type! *)
106 let split_goals_with_metas metasenv subst gl =
109 let _,context,ty = CicUtil.lookup_meta g metasenv in
110 let ty = CicMetaSubst.apply_subst subst ty in
111 CicUtil.is_meta_closed ty)
115 let order_new_goals metasenv subst open_goals ppterm =
116 let prop,rest = split_goals_in_prop metasenv subst open_goals in
117 let closed_prop, open_prop = split_goals_with_metas metasenv subst prop in
118 let closed_type, open_type = split_goals_with_metas metasenv subst rest in
120 (List.map (fun x -> x,P) (open_prop @ closed_prop))
122 (List.map (fun x -> x,T) (open_type @ closed_type))
127 let _,_,ty = CicUtil.lookup_meta i metasenv in i,ty,sort) open_goals
129 debug_print (lazy (" OPEN: "^
133 | (i,t,P) -> string_of_int i ^ ":"^ppterm t^ "Prop"
134 | (i,t,T) -> string_of_int i ^ ":"^ppterm t^ "Type")
139 let is_an_equational_goal = function
140 | Cic.Appl [Cic.MutInd(u,_,_);_;_;_] when LibraryObjects.is_eq_URI u -> true
144 type auto_params = Cic.term list option * (string * string) list
146 let elems = ref [] ;;
148 (* closing a term w.r.t. its metavariables
149 very naif version: it does not take dependencies properly into account *)
151 let naif_closure ?(prefix_name="xxx_") t metasenv context =
152 let in_term t (i,_,_) =
153 List.exists (fun (j,_) -> j=i) (CicUtil.metas_of_term t)
155 let metasenv = List.filter (in_term t) metasenv in
156 let metasenv = ProofEngineHelpers.sort_metasenv metasenv in
157 let n = List.length metasenv in
158 let what = List.map (fun (i,cc,ty) -> Cic.Meta(i,[])) metasenv in
161 (fun (i,acc) (_,cc,ty) -> (i-1,Cic.Rel i::acc))
164 let t = CicSubstitution.lift n t in
166 ProofEngineReduction.replace_lifting
167 ~equality:(fun c t1 t2 ->
169 | Cic.Meta(i,_),Cic.Meta(j,_) -> i = j
171 ~context ~what ~with_what ~where:t
175 (fun (n,t) (_,cc,ty) ->
176 n-1, Cic.Lambda(Cic.Name (prefix_name^string_of_int n),
177 CicSubstitution.lift n ty,t))
180 t, List.length metasenv
183 let lambda_close ?prefix_name t menv ctx =
184 let t, num_lambdas = naif_closure ?prefix_name t menv ctx in
186 (fun (t,i) -> function
187 | None -> CicSubstitution.subst (Cic.Implicit None) t,i (* delift *)
188 | Some (name, Cic.Decl ty) -> Cic.Lambda (name, ty, t),i+1
189 | Some (name, Cic.Def (bo, ty)) -> Cic.LetIn (name, bo, ty, t),i+1)
193 (* functions for retrieving theorems *)
196 exception FillingFailure of AutoCache.cache * AutomationCache.tables
198 let rec unfold context = function
199 | Cic.Prod(name,s,t) ->
200 let t' = unfold ((Some (name,Cic.Decl s))::context) t in
202 | t -> ProofEngineReduction.unfold context t
204 let find_library_theorems dbd proof goal =
205 let univ = MetadataQuery.universe_of_goal ~dbd false proof goal in
206 let terms = List.map CicUtil.term_of_uri univ in
209 (t,fst(CicTypeChecker.type_of_aux' [] [] t CicUniv.oblivion_ugraph)))
212 let find_context_theorems context metasenv =
215 (fun (res,i) ctxentry ->
217 | Some (_,Cic.Decl t) ->
218 (Cic.Rel i, CicSubstitution.lift i t)::res,i+1
219 | Some (_,Cic.Def (_,t)) ->
220 (Cic.Rel i, CicSubstitution.lift i t)::res,i+1
225 let rec is_an_equality = function
226 | Cic.Appl [Cic.MutInd (uri, _, _); _; _; _]
227 when (LibraryObjects.is_eq_URI uri) -> true
228 | Cic.Prod (_, _, t) -> is_an_equality t
232 let partition_equalities =
233 List.partition (fun (_,ty) -> is_an_equality ty)
236 let default_auto tables _ cache _ _ _ _ = [],cache,tables ;;
238 (* giusto per provare che succede
239 let is_unit_equation context metasenv oldnewmeta term =
240 let head, metasenv, args, newmeta =
241 TermUtil.saturate_term oldnewmeta metasenv context term 0
244 List.filter (fun (i,_,_) -> i >= oldnewmeta) metasenv
246 Some (args,metasenv,newmetas,head,newmeta) *)
248 let is_unit_equation context metasenv oldnewmeta term =
249 let head, metasenv, args, newmeta =
250 TermUtil.saturate_term oldnewmeta metasenv context term 0
252 let propositional_args =
256 let _,_,mt = CicUtil.lookup_meta i metasenv in
258 CicTypeChecker.type_of_aux' metasenv context mt
259 CicUniv.oblivion_ugraph
261 if is_propositional context sort then Some i else None
265 if propositional_args = [] then
267 List.filter (fun (i,_,_) -> i >= oldnewmeta) metasenv
269 Some (args,metasenv,newmetas,head,newmeta)
273 let get_candidates skip_trie_filtering universe cache t =
274 let t = if skip_trie_filtering then Cic.Meta(0,[]) else t in
276 (Universe.get_candidates universe t)@(AutoCache.get_candidates cache t)
279 (lazy ("candidates for " ^ (CicPp.ppterm t) ^ " = " ^
280 (String.concat "\n" (List.map CicPp.ppterm candidates)))) in
281 debug_print debug_msg;
285 let only signature context metasenv t =
288 CicTypeChecker.type_of_aux' metasenv context t CicUniv.oblivion_ugraph
290 let consts = MetadataConstraints.constants_of ty in
291 let b = MetadataConstraints.UriManagerSet.subset consts signature in
292 (* if b then (prerr_endline ("keeping " ^ (CicPp.ppterm t)); b) *)
295 let ty' = unfold context ty in
296 let consts' = MetadataConstraints.constants_of ty' in
297 let b = MetadataConstraints.UriManagerSet.subset consts' signature in
299 if not b then prerr_endline ("filtering " ^ (CicPp.ppterm t))
300 else prerr_endline ("keeping " ^ (CicPp.ppterm t));
304 | CicTypeChecker.TypeCheckerFailure _ -> assert false
305 | ProofEngineTypes.Fail _ -> false (* unfold may fail *)
308 let not_default_eq_term t =
310 let uri = CicUtil.uri_of_term t in
311 not (LibraryObjects.in_eq_URIs uri)
312 with Invalid_argument _ -> true
314 let retrieve_equations dont_filter signature universe cache context metasenv =
315 match LibraryObjects.eq_URI() with
318 let eq_uri = UriManager.strip_xpointer eq_uri in
319 let fake= Cic.Meta(-1,[]) in
320 let fake_eq = Cic.Appl [Cic.MutInd (eq_uri,0, []);fake;fake;fake] in
321 let candidates = get_candidates false universe cache fake_eq in
322 if dont_filter then candidates
323 else let eq_uri = UriManager.uri_of_uriref eq_uri 0 None in
324 (* let candidates = List.filter not_default_eq_term candidates in *)
326 (only (MetadataConstraints.UriManagerSet.add eq_uri signature)
327 context metasenv) candidates
329 let build_equality bag head args proof newmetas =
331 | Cic.Appl [Cic.MutInd (uri, _, _); ty; t1; t2] ->
333 if args = [] then proof else Cic.Appl (proof::args)
335 let o = !Utils.compare_terms t1 t2 in
336 let stat = (ty,t1,t2,o) in
337 (* let w = compute_equality_weight stat in *)
339 let proof = Equality.Exact p in
340 let bag, e = Equality.mk_equality bag (w, proof, stat, newmetas) in
341 (* to clean the local context of metas *)
342 Equality.fix_metas bag e
346 let partition_unit_equalities context metasenv newmeta bag equations =
348 (fun (bag,units,other,maxmeta)(t,ty) ->
349 if not (CicUtil.is_meta_closed t && CicUtil.is_meta_closed ty) then
352 ("Skipping " ^ CicMetaSubst.ppterm_in_context ~metasenv [] t context
353 ^ " since it is not meta closed")
355 bag, units,(t,ty)::other,maxmeta
357 match is_unit_equation context metasenv maxmeta ty with
358 | Some (args,metasenv,newmetas,head,newmeta') ->
360 build_equality bag head args t newmetas in
361 bag, equality::units,other,maxmeta
363 bag, units,(t,ty)::other,maxmeta)
364 (bag,[],[],newmeta) equations
367 let init_cache_and_tables
368 ?dbd ~use_library ~use_context
369 automation_cache restricted_univ (proof, goal)
371 let _, metasenv, subst, _, _, _ = proof in
372 let _,context,_ = CicUtil.lookup_meta goal metasenv in
373 let add_list_to_tables metasenv subst automation_cache ct =
375 (fun automation_cache (t,_) ->
376 AutomationCache.add_term_to_active automation_cache
377 metasenv subst context t None)
380 match restricted_univ with
383 if use_context then find_context_theorems context metasenv else []
386 match use_library, dbd with
387 | true, Some dbd -> find_library_theorems dbd metasenv goal
390 let cache = AutoCache.cache_empty in
391 let cache = cache_add_list cache context (ct@lt) in
392 let automation_cache =
393 add_list_to_tables metasenv subst automation_cache ct
395 (* AutomationCache.pp_cache automation_cache; *)
396 automation_cache.AutomationCache.univ,
397 automation_cache.AutomationCache.tables,
399 | Some restricted_univ ->
403 let ty, _ = CicTypeChecker.type_of_aux'
404 metasenv ~subst:[] context t CicUniv.oblivion_ugraph
409 (* let automation_cache = AutomationCache.empty () in *)
410 let automation_cache =
411 let universe = Universe.empty in
413 Universe.index_list universe context t_ty
415 { automation_cache with AutomationCache.univ = universe }
418 if use_context then find_context_theorems context metasenv else t_ty
420 let automation_cache =
421 add_list_to_tables metasenv subst automation_cache ct
423 (* AutomationCache.pp_cache automation_cache; *)
424 automation_cache.AutomationCache.univ,
425 automation_cache.AutomationCache.tables,
429 let fill_hypothesis context metasenv subst term tables (universe:Universe.universe) cache auto fast =
430 let actives, passives, bag = tables in
431 let bag, head, metasenv, args =
432 Equality.saturate_term bag metasenv subst context term
434 let tables = actives, passives, bag in
435 let propositional_args =
439 let _,_,mt = CicUtil.lookup_meta i metasenv in
441 CicTypeChecker.type_of_aux' metasenv context mt
442 CicUniv.oblivion_ugraph
444 if is_propositional context sort then Some i else None
448 let results,cache,tables =
449 if propositional_args = [] then
450 let _,_,bag = tables in
451 let newmetas = Equality.filter_metasenv_gt_maxmeta bag metasenv in
452 [args,metasenv,newmetas,head],cache,tables
456 None,metasenv,term,term (* term non e' significativo *)
460 {AutoTypes.default_flags() with
461 AutoTypes.timeout = Unix.gettimeofday() +. 1.0;
462 maxwidth = 2;maxdepth = 2;
463 use_paramod=true;use_only_paramod=false}
465 {AutoTypes.default_flags() with
466 AutoTypes.timeout = Unix.gettimeofday() +. 1.0;
467 maxwidth = 2;maxdepth = 4;
468 use_paramod=true;use_only_paramod=false}
470 match auto tables universe cache context metasenv propositional_args flags with
471 | [],cache,tables -> raise (FillingFailure (cache,tables))
472 | substs,cache,tables ->
473 let actives, passaives, bag = tables in
476 (fun subst (bag,acc) ->
478 CicMetaSubst.apply_subst_metasenv subst metasenv
480 let head = CicMetaSubst.apply_subst subst head in
481 let newmetas = Equality.filter_metasenv_gt_maxmeta bag metasenv in
482 let args = List.map (CicMetaSubst.apply_subst subst) args in
483 let newm = CicMkImplicit.new_meta metasenv subst in
484 let bag = Equality.push_maxmeta bag newm in
485 bag, ((args,metasenv,newmetas,head) :: acc))
488 let tables = actives, passives, bag in
494 let build_equalities auto context metasenv subst tables universe cache equations =
496 (fun (tables,facts,cache) (t,ty) ->
497 (* in any case we add the equation to the cache *)
498 let cache = AutoCache.cache_add_list cache context [(t,ty)] in
500 let saturated, cache, tables =
501 fill_hypothesis context metasenv subst ty tables universe cache auto true
505 (fun (acc, tables) (args,metasenv,newmetas,head) ->
506 let actives, passives, bag = tables in
508 build_equality bag head args t newmetas
510 let tables = actives, passives, bag in
511 equality::acc,tables)
512 ([],tables) saturated
514 (tables, eqs@facts, cache)
515 with FillingFailure (cache,tables) ->
516 (* if filling hypothesis fails we add the equation to
520 (tables,[],cache) equations
522 let close_more tables context status auto signature universe cache =
523 let proof, goalno = status in
524 let _, metasenv,subst,_,_, _ = proof in
526 retrieve_equations false signature universe cache context metasenv
532 CicTypeChecker.type_of_aux' metasenv context t
533 CicUniv.oblivion_ugraph in
534 (* retrieve_equations could also return flexible terms *)
535 if is_an_equality ty then Some(t,ty) else None)
537 let tables, units, cache =
538 build_equalities auto context metasenv subst tables universe cache eqs_and_types
540 let active,passive,bag = tables in
541 let passive = Saturation.add_to_passive units passive in
542 let no = List.length units in
543 let active, passive, bag =
544 Saturation.pump_actives context bag active passive (no+1) infinity
546 (active,passive,bag), cache
549 let find_context_equalities dbd tables context proof (universe:Universe.universe) cache
551 let module C = Cic in
552 let module S = CicSubstitution in
553 let module T = CicTypeChecker in
554 let _,metasenv,subst,_,_, _ = proof in
555 (* if use_auto is true, we try to close the hypothesis of equational
556 statements using auto; a naif, and probably wrong approach *)
557 let rec aux tables cache index = function
558 | [] -> tables, [], cache
559 | (Some (_, C.Decl (term)))::tl ->
562 (Printf.sprintf "Examining: %d (%s)" index (CicPp.ppterm term)));
563 let do_find tables context term =
565 | C.Prod (name, s, t) when is_an_equality t ->
567 let term = S.lift index term in
568 let saturated, cache, tables =
569 fill_hypothesis context metasenv subst term
570 tables universe cache default_auto false
572 let actives, passives, bag = tables in
575 (fun (bag,acc) (args,metasenv,newmetas,head) ->
577 build_equality bag head args (Cic.Rel index) newmetas
582 let tables = actives, passives, bag in
584 with FillingFailure (cache,tables) ->
586 | C.Appl [C.MutInd (uri, _, _); ty; t1; t2]
587 when LibraryObjects.is_eq_URI uri ->
588 let term = S.lift index term in
589 let actives, passives, bag = tables in
591 build_equality bag term [] (Cic.Rel index) []
593 let tables = actives, passives, bag in
595 | _ -> tables, [], cache
597 let tables, eqs, cache = do_find tables context term in
598 let tables, rest, cache = aux tables cache (index+1) tl in
599 tables, List.map (fun x -> index,x) eqs @ rest, cache
601 aux tables cache (index+1) tl
603 let tables, il, cache = aux tables cache 1 context in
604 let indexes, equalities = List.split il in
605 tables, indexes, equalities, cache
608 (********** PARAMETERS PASSING ***************)
610 let bool params name default =
612 let s = List.assoc name params in
613 if s = "" || s = "1" || s = "true" || s = "yes" || s = "on" then true
614 else if s = "0" || s = "false" || s = "no" || s= "off" then false
616 let msg = "Unrecognized value for parameter "^name^"\n" in
617 let msg = msg^"Accepted values are 1,true,yes,on and 0,false,no,off" in
618 raise (ProofEngineTypes.Fail (lazy msg))
619 with Not_found -> default
622 let string params name default =
623 try List.assoc name params with
624 | Not_found -> default
627 let int params name default =
628 try int_of_string (List.assoc name params) with
629 | Not_found -> default
631 raise (ProofEngineTypes.Fail (lazy (name ^ " must be an integer")))
634 let flags_of_params params ?(for_applyS=false) () =
635 let int = int params in
636 let bool = bool params in
637 let close_more = bool "close_more" false in
638 let use_paramod = bool "use_paramod" true in
639 let skip_trie_filtering = bool "skip_trie_filtering" false in
640 let skip_context = bool "skip_context" false in
641 let use_only_paramod =
642 if for_applyS then true else bool "paramodulation" false in
643 let use_library = bool "library"
644 ((AutoTypes.default_flags()).AutoTypes.use_library) in
645 let depth = int "depth" ((AutoTypes.default_flags()).AutoTypes.maxdepth) in
646 let width = int "width" ((AutoTypes.default_flags()).AutoTypes.maxwidth) in
647 let size = int "size" ((AutoTypes.default_flags()).AutoTypes.maxsize) in
648 let gsize = int "gsize" ((AutoTypes.default_flags()).AutoTypes.maxgoalsizefactor) in
649 let do_type = bool "type" false in
650 let timeout = int "timeout" 0 in
651 { AutoTypes.maxdepth =
652 if use_only_paramod then 2 else depth;
653 AutoTypes.maxwidth = width;
654 AutoTypes.maxsize = size;
657 if for_applyS then Unix.gettimeofday () +. 30.0
661 Unix.gettimeofday() +. (float_of_int timeout);
662 AutoTypes.use_library = use_library;
663 AutoTypes.use_paramod = use_paramod;
664 AutoTypes.use_only_paramod = use_only_paramod;
665 AutoTypes.close_more = close_more;
666 AutoTypes.dont_cache_failures = false;
667 AutoTypes.maxgoalsizefactor = gsize;
668 AutoTypes.do_types = do_type;
669 AutoTypes.skip_trie_filtering = skip_trie_filtering;
670 AutoTypes.skip_context = skip_context;
674 let eq_of_goal = function
675 | Cic.Appl [Cic.MutInd(uri,0,_);_;_;_] when LibraryObjects.is_eq_URI uri ->
677 | _ -> raise (ProofEngineTypes.Fail (lazy ("The goal is not an equality ")))
680 (* performs steps of rewrite with the universe, obtaining if possible
682 let solve_rewrite ~automation_cache ~params:(univ,params) (proof,goal)=
683 let steps = int_of_string (string params "steps" "4") in
684 let use_context = bool params "use_context" true in
685 let universe, tables, cache =
686 init_cache_and_tables ~use_library:false ~use_context
687 automation_cache univ (proof,goal)
689 let actives, passives, bag = tables in
690 let pa,metasenv,subst,pb,pc,pd = proof in
691 let _,context,ty = CicUtil.lookup_meta goal metasenv in
692 let metasenv = CicMetaSubst.apply_subst_metasenv subst metasenv in
693 let context = CicMetaSubst.apply_subst_context subst context in
694 let ty = CicMetaSubst.apply_subst subst ty in
695 let eq_uri = eq_of_goal ty in
696 let initgoal = [], metasenv, ty in
698 let equalities = (Saturation.list_of_passive passives) in
699 List.fold_left (fun tbl eq -> Indexing.index tbl eq) (snd actives) equalities
701 let env = metasenv,context,CicUniv.oblivion_ugraph in
702 debug_print (lazy ("demod to solve: " ^ CicPp.ppterm ty));
703 match Indexing.solve_demodulating bag env table initgoal steps with
704 | Some (bag, gproof, metasenv, sub_subst, proof) ->
705 let subst_candidates,extra_infos =
709 if i <> goal && c = context then Some (i,(c,ty)) else None)
712 let proofterm,proto_subst =
713 let proof = Equality.add_subst sub_subst proof in
714 Equality.build_goal_proof
715 bag eq_uri gproof proof ty subst_candidates context metasenv
717 let proofterm = Subst.apply_subst sub_subst proofterm in
720 (fun (i,((c,ty),t)) ->
722 | Cic.Meta (j,_) when i=j -> None
723 | _ -> Some (i,(c,t,ty)))
724 (List.combine subst_candidates
725 (List.combine extra_infos proto_subst))
727 let subst = subst @ extrasubst in
728 let metasenv = CicMetaSubst.apply_subst_metasenv subst metasenv in
729 let proofterm, _, metasenv,subst, _ =
730 CicRefine.type_of metasenv subst context proofterm
731 CicUniv.oblivion_ugraph
733 let status = (pa,metasenv,subst,pb,pc,pd), goal in
734 ProofEngineTypes.apply_tactic
735 (PrimitiveTactics.apply_tac ~term:proofterm) status
738 (ProofEngineTypes.Fail (lazy
739 ("Unable to solve with " ^ string_of_int steps ^ " demodulations")))
742 (* Demodulate thorem *)
743 let open_type ty bo =
744 let rec open_type_aux context ty k args =
746 | Cic.Prod (n,s,t) ->
748 FreshNamesGenerator.mk_fresh_name [] context n ~typ:s ~subst:[] in
749 let entry = match n' with
750 | Cic.Name _ -> Some (n',(Cic.Decl s))
751 | Cic.Anonymous -> None
753 open_type_aux (entry::context) t (k+1) ((Cic.Rel k)::args)
754 | Cic.LetIn (n,s,sty,t) ->
755 let entry = Some (n,(Cic.Def (s,sty)))
757 open_type_aux (entry::context) t (k+1) args
758 | _ -> context, ty, args
760 let context, ty, args = open_type_aux [] ty 1 [] in
762 | [] -> context, ty, bo
763 | _ -> context, ty, Cic.Appl (bo::args)
766 let rec close_type bo ty context =
768 | [] -> assert_proof_is_valid bo [] [] ty; (bo,ty)
769 | Some (n,(Cic.Decl s))::tl ->
770 close_type (Cic.Lambda (n,s,bo)) (Cic.Prod (n,s,ty)) tl
771 | Some (n,(Cic.Def (s,sty)))::tl ->
772 close_type (Cic.LetIn (n,s,sty,bo)) (Cic.LetIn (n,s,sty,ty)) tl
776 let is_subsumed univ context ty =
777 let candidates = Universe.get_candidates univ ty in
781 | Some found -> Some found
785 CicMkImplicit.identity_relocation_list_for_metavariable in
786 let metasenv = [(0,context,ty)] in
788 None,metasenv,[] , (lazy (Cic.Meta(0,mk_irl context))),ty,[]
790 let (_,metasenv,subst,_,_,_), open_goals =
791 ProofEngineTypes.apply_tactic
792 (PrimitiveTactics.apply_tac ~term:cand)
795 let prop_goals, other =
796 split_goals_in_prop metasenv subst open_goals
798 if prop_goals = [] then Some cand else None
800 | ProofEngineTypes.Fail s -> None
801 | CicUnification.Uncertain s -> None
805 let demodulate_theorem ~automation_cache uri =
807 match LibraryObjects.eq_URI () with
809 | None -> raise (ProofEngineTypes.Fail (lazy "equality not declared")) in
810 let obj,_ = CicEnvironment.get_cooked_obj CicUniv.empty_ugraph uri
814 | Cic.Constant(n, _, ty ,_, _) -> open_type ty (Cic.Const(uri,[]))
815 | _ -> raise (ProofEngineTypes.Fail (lazy "not a theorem"))
817 if CicUtil.is_closed ty then
818 raise (ProofEngineTypes.Fail (lazy ("closed term: dangerous reduction")));
819 let initgoal = [], [], ty in
820 (* compute the signature *)
822 let ty_set = MetadataConstraints.constants_of ty in
823 let hyp_set = MetadataQuery.signature_of_hypothesis context [] in
824 let set = MetadataConstraints.UriManagerSet.union ty_set hyp_set in
825 MetadataQuery.close_with_types set [] context
827 (* retrieve equations from the universe universe *)
828 (* XXX automation_cache *)
829 let universe = automation_cache.AutomationCache.univ in
831 retrieve_equations true signature universe AutoCache.cache_empty context []
834 (lazy ("ho trovato equazioni n. "^(string_of_int (List.length equations))));
839 CicTypeChecker.type_of_aux' [] context t CicUniv.oblivion_ugraph
841 (* retrieve_equations could also return flexible terms *)
842 if is_an_equality ty then Some(t,ty)
845 let ty' = unfold context ty in
846 if is_an_equality ty' then Some(t,ty') else None
847 with ProofEngineTypes.Fail _ -> None)
850 let bag = Equality.mk_equality_bag () in
852 let bag, units, _, newmeta =
853 partition_unit_equalities context [] (CicMkImplicit.new_meta [] []) bag eqs_and_types
857 (fun tbl eq -> Indexing.index tbl eq)
860 let changed,(newproof,newmetasenv, newty) =
862 ([],context,CicUniv.oblivion_ugraph) table initgoal in
865 let oldproof = Equality.Exact bo in
867 Equality.build_goal_proof (~contextualize:false) (~forward:true) bag
868 eq_uri newproof oldproof ty [] context newmetasenv
870 if newmetasenv <> [] then
871 raise (ProofEngineTypes.Fail (lazy ("metasenv not empty")))
874 assert_proof_is_valid proofterm newmetasenv context newty;
875 match is_subsumed universe context newty with
877 (ProofEngineTypes.Fail (lazy ("subsumed by " ^ CicPp.ppterm t)))
878 | None -> close_type proofterm newty context
881 else (* if newty = ty then *)
882 raise (ProofEngineTypes.Fail (lazy "no progress"))
883 (*else ProofEngineTypes.apply_tactic
884 (ReductionTactics.simpl_tac
885 ~pattern:(ProofEngineTypes.conclusion_pattern None)) initialstatus*)
890 let demodulate ~dbd ~automation_cache ~params:(univ, params) (proof,goal)=
891 let universe, tables, cache =
892 init_cache_and_tables
893 ~dbd ~use_library:false ~use_context:true
894 automation_cache univ (proof,goal)
897 match LibraryObjects.eq_URI () with
899 | None -> raise (ProofEngineTypes.Fail (lazy "equality not declared")) in
900 let active, passive, bag = tables in
901 let curi,metasenv,subst,pbo,pty, attrs = proof in
902 let metano,context,ty = CicUtil.lookup_meta goal metasenv in
903 let irl = CicMkImplicit.identity_relocation_list_for_metavariable context in
904 let initgoal = [], metasenv, ty in
905 let equalities = (Saturation.list_of_passive passive) in
906 (* we demodulate using both actives passives *)
907 let env = metasenv,context,CicUniv.empty_ugraph in
908 debug_print (lazy ("PASSIVES:" ^ string_of_int(List.length equalities)));
909 List.iter (fun e -> debug_print (lazy (Equality.string_of_equality ~env e)))
913 (fun tbl eq -> Indexing.index tbl eq)
914 (snd active) equalities
916 let changed,(newproof,newmetasenv, newty) =
917 (* Indexing.demodulation_goal bag *)
919 (metasenv,context,CicUniv.oblivion_ugraph) table initgoal
923 let maxm = CicMkImplicit.new_meta metasenv subst in
924 let opengoal = Equality.Exact (Cic.Meta(maxm,irl)) in
925 let subst_candidates = List.map (fun (i,_,_) -> i) metasenv in
926 let subst_candidates = List.filter (fun x-> x <> goal) subst_candidates in
927 let proofterm, proto_subst =
928 Equality.build_goal_proof (~contextualize:false) bag
929 eq_uri newproof opengoal ty subst_candidates context metasenv
931 (* XXX understan what to do with proto subst *)
932 let metasenv = (maxm,context,newty)::metasenv in
933 let proofterm, _, metasenv, subst, _ =
934 CicRefine.type_of metasenv subst context proofterm
935 CicUniv.oblivion_ugraph
937 let extended_status = (curi,metasenv,subst,pbo,pty, attrs),goal in
939 ProofEngineTypes.apply_tactic
940 (PrimitiveTactics.apply_tac ~term:proofterm) extended_status
945 raise (ProofEngineTypes.Fail (lazy "no progress"))
948 let demodulate_tac ~dbd ~params:(_,flags as params) ~automation_cache =
949 ProofEngineTypes.mk_tactic
951 let all = bool flags "all" false in
953 solve_rewrite ~params ~automation_cache status
955 demodulate ~dbd ~params ~automation_cache status)
957 (***************** applyS *******************)
960 dbd automation_cache (params:auto_params) proof goal newmeta' metasenv' subst
961 context term' ty termty goal_arity
963 let consthead,newmetasenv,arguments,_ =
964 TermUtil.saturate_term newmeta' metasenv' context termty goal_arity in
968 | _ -> Cic.Appl (term'::arguments)
971 let rec aux t = function
973 let t = CicReduction.normalize ~delta:false context t in
975 | Cic.Appl (hd1::_), Cic.Appl (hd2::_) when hd1 <> hd2 ->
976 let t = ProofEngineReduction.unfold context t in
978 | Cic.Appl (hd1'::_) when hd1' = hd2 -> t
979 | _ -> raise (ProofEngineTypes.Fail (lazy "incompatible head")))
982 match CicReduction.whd context t with
983 | Cic.Prod (_,_,tgt) ->
984 aux (CicSubstitution.subst arg tgt) tl
989 let goal_for_paramod =
990 match LibraryObjects.eq_URI () with
992 Cic.Appl [Cic.MutInd (uri,0,[]); Cic.Implicit (Some `Type); consthead; ty]
993 | None -> raise (ProofEngineTypes.Fail (lazy "No equality defined"))
996 let goal_for_paramod, _, newmetasenv, subst, _ =
997 CicRefine.type_of newmetasenv subst context goal_for_paramod
998 CicUniv.oblivion_ugraph
1000 let newmeta = CicMkImplicit.new_meta newmetasenv subst in
1001 let metasenv_for_paramod = (newmeta,context,goal_for_paramod)::newmetasenv in
1003 let uri,_,_,p,ty, attrs = proof in
1004 uri,metasenv_for_paramod,subst,p,ty, attrs
1006 let irl = CicMkImplicit.identity_relocation_list_for_metavariable context in
1008 prerr_endline ("------ prima di rewrite su ------ " ^ string_of_int goal);
1009 prerr_endline ("menv:\n"^CicMetaSubst.ppmetasenv [] metasenv_for_paramod);
1010 prerr_endline ("subst:\n"^CicMetaSubst.ppsubst
1011 ~metasenv:(metasenv_for_paramod)
1015 let (proof''',goals) =
1016 ProofEngineTypes.apply_tactic
1017 (EqualityTactics.rewrite_tac ~direction:`RightToLeft
1018 ~pattern:(ProofEngineTypes.conclusion_pattern None)
1019 (Cic.Meta(newmeta,irl)) []) (proof'',goal)
1021 let goal = match goals with [g] -> g | _ -> assert false in
1023 ProofEngineTypes.apply_tactic
1024 (PrimitiveTactics.apply_tac term'')
1029 let (_,m,_,_,_,_ as p) =
1030 let pu,metasenv,subst,proof,px,py = proof'''' in
1031 let metasenv = CicMetaSubst.apply_subst_metasenv subst metasenv in
1032 let proof'''' = pu,metasenv,subst,proof,px,py in
1033 let univ, params = params in
1034 let use_context = bool params "use_context" true in
1035 let universe, (active,passive,bag), cache =
1036 init_cache_and_tables ~use_library:false ~use_context
1037 automation_cache univ (proof'''',newmeta)
1040 Saturation.solve_narrowing bag (proof'''',newmeta) active passive
1043 | None, active, passive, bag ->
1044 raise (ProofEngineTypes.Fail (lazy ("paramod fails")))
1045 | Some(subst',(pu,metasenv,_,proof,px, py),open_goals),active,
1047 assert_subst_are_disjoint subst subst';
1048 let subst = subst@subst' in
1049 pu,metasenv,subst,proof,px,py
1053 let (_,m,_,_,_,_ as p),_ =
1054 solve_rewrite ~params ~automation_cache (proof'''',newmeta)
1059 ProofEngineHelpers.compare_metasenvs ~oldmetasenv:metasenv' ~newmetasenv:m
1063 CicRefine.RefineFailure msg ->
1064 raise (ProofEngineTypes.Fail msg)
1068 ~dbd ~term ~automation_cache ~params (proof, goal)
1070 let module T = CicTypeChecker in
1071 let module R = CicReduction in
1072 let module C = Cic in
1073 let (_,metasenv,subst,_,_, _) = proof in
1074 let metano,context,ty = CicUtil.lookup_meta goal metasenv in
1075 let newmeta = CicMkImplicit.new_meta metasenv subst in
1076 let exp_named_subst_diff,newmeta',newmetasenvfragment,term' =
1078 C.Var (uri,exp_named_subst) ->
1079 let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
1080 PrimitiveTactics.generalize_exp_named_subst_with_fresh_metas context newmeta uri
1083 exp_named_subst_diff,newmeta',newmetasenvfragment,
1084 C.Var (uri,exp_named_subst')
1085 | C.Const (uri,exp_named_subst) ->
1086 let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
1087 PrimitiveTactics.generalize_exp_named_subst_with_fresh_metas context newmeta uri
1090 exp_named_subst_diff,newmeta',newmetasenvfragment,
1091 C.Const (uri,exp_named_subst')
1092 | C.MutInd (uri,tyno,exp_named_subst) ->
1093 let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
1094 PrimitiveTactics.generalize_exp_named_subst_with_fresh_metas context newmeta uri
1097 exp_named_subst_diff,newmeta',newmetasenvfragment,
1098 C.MutInd (uri,tyno,exp_named_subst')
1099 | C.MutConstruct (uri,tyno,consno,exp_named_subst) ->
1100 let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
1101 PrimitiveTactics.generalize_exp_named_subst_with_fresh_metas context newmeta uri
1104 exp_named_subst_diff,newmeta',newmetasenvfragment,
1105 C.MutConstruct (uri,tyno,consno,exp_named_subst')
1106 | _ -> [],newmeta,[],term
1108 let metasenv' = metasenv@newmetasenvfragment in
1110 CicTypeChecker.type_of_aux'
1111 metasenv' ~subst context term' CicUniv.oblivion_ugraph
1113 let termty = CicSubstitution.subst_vars exp_named_subst_diff termty in
1115 let rec count_prods context ty =
1116 match CicReduction.whd ~subst context ty with
1117 | Cic.Prod (n,s,t) -> 1 + count_prods (Some (n,Cic.Decl s)::context) t
1120 count_prods context ty
1122 apply_smart_aux dbd automation_cache params proof goal
1123 newmeta' metasenv' subst context term' ty termty goal_arity
1126 let applyS_tac ~dbd ~term ~params ~automation_cache =
1127 ProofEngineTypes.mk_tactic
1130 apply_smart ~dbd ~term ~params ~automation_cache status
1132 | CicUnification.UnificationFailure msg
1133 | CicTypeChecker.TypeCheckerFailure msg ->
1134 raise (ProofEngineTypes.Fail msg))
1138 (****************** AUTO ********************)
1140 let calculate_timeout flags =
1141 if flags.timeout = 0. then
1142 (debug_print (lazy "AUTO WITH NO TIMEOUT");
1143 {flags with timeout = infinity})
1147 let is_equational_case goalty flags =
1148 let ensure_equational t =
1149 if is_an_equational_goal t then true
1152 (flags.use_paramod && is_an_equational_goal goalty) ||
1153 (flags.use_only_paramod && ensure_equational goalty)
1156 type menv = Cic.metasenv
1157 type subst = Cic.substitution
1158 type goal = ProofEngineTypes.goal * int * AutoTypes.sort
1159 let candidate_no = ref 0;;
1160 type candidate = int * Cic.term Lazy.t
1161 type cache = AutoCache.cache
1164 (* the goal (mainly for depth) and key of the goal *)
1165 goal * AutoCache.cache_key
1167 (* goal has to be proved *)
1169 (* goal has to be cached as a success obtained using candidate as the first
1171 | S of goal * AutoCache.cache_key * candidate * int
1173 (* menv, subst, size, operations done (only S), operations to do, failures to cache if any op fails *)
1174 menv * subst * int * op list * op list * fail list
1176 (* list of computations that may lead to the solution: all op list will
1177 * end with the same (S(g,_)) *)
1180 (* menv, subst, alternatives, tables, cache *)
1181 | Proved of menv * subst * elem list * AutomationCache.tables * cache
1182 | Gaveup of AutomationCache.tables * cache
1185 (* the status exported to the external observer *)
1187 (* context, (goal,candidate) list, and_list, history *)
1188 Cic.context * (int * Cic.term * bool * int * (int * Cic.term Lazy.t) list) list *
1189 (int * Cic.term * int) list * Cic.term Lazy.t list
1192 let rec aux acc = function
1193 | (D g)::tl -> aux (acc@[g]) tl
1199 List.filter (function (_,_,P) -> true | _ -> false) l
1203 let rec aux acc = function
1204 | (D g)::tl -> aux (acc@[g]) tl
1205 | (S _)::tl -> aux acc tl
1211 let calculate_goal_ty (goalno,_,_) s m =
1213 let _,cc,goalty = CicUtil.lookup_meta goalno m in
1214 (* XXX applicare la subst al contesto? *)
1215 Some (cc, CicMetaSubst.apply_subst s goalty)
1216 with CicUtil.Meta_not_found i when i = goalno -> None
1219 let calculate_closed_goal_ty (goalno,_,_) s =
1221 let cc,_,goalty = List.assoc goalno s in
1222 (* XXX applicare la subst al contesto? *)
1223 Some (cc, CicMetaSubst.apply_subst s goalty)
1228 let pp_status ctx status =
1230 let names = Utils.names_of_context ctx in
1233 ProofEngineReduction.replace
1234 ~equality:(fun a b -> match b with Cic.Meta _ -> true | _ -> false)
1235 ~what:[Cic.Rel 1] ~with_what:[Cic.Implicit None] ~where:x
1239 let string_of_do m s (gi,_,_ as g) d =
1240 match calculate_goal_ty g s m with
1241 | Some (_,gty) -> Printf.sprintf "D(%d, %s, %d)" gi (pp gty) d
1242 | None -> Printf.sprintf "D(%d, _, %d)" gi d
1244 let string_of_s m su k (ci,ct) gi =
1245 Printf.sprintf "S(%d, %s, %s, %d)" gi (pp k) (pp (Lazy.force ct)) ci
1247 let string_of_ol m su l =
1251 | D (g,d,s) -> string_of_do m su (g,d,s) d
1252 | S ((gi,_,_),k,c,_) -> string_of_s m su k c gi)
1255 let string_of_fl m s fl =
1257 (List.map (fun ((i,_,_),ty) ->
1258 Printf.sprintf "(%d, %s)" i (pp ty)) fl)
1260 let rec aux = function
1262 | (m,s,_,_,ol,fl)::tl ->
1263 Printf.eprintf "< [%s] ;;; [%s]>\n"
1264 (string_of_ol m s ol) (string_of_fl m s fl);
1267 Printf.eprintf "-------------------------- status -------------------\n";
1269 Printf.eprintf "-----------------------------------------------------\n";
1272 let auto_status = ref [] ;;
1273 let auto_context = ref [];;
1274 let in_pause = ref false;;
1275 let pause b = in_pause := b;;
1276 let cond = Condition.create ();;
1277 let mutex = Mutex.create ();;
1278 let hint = ref None;;
1279 let prune_hint = ref [];;
1281 let step _ = Condition.signal cond;;
1282 let give_hint n = hint := Some n;;
1283 let give_prune_hint hint =
1284 prune_hint := hint :: !prune_hint
1291 Condition.wait cond mutex;
1296 let get_auto_status _ =
1297 let status = !auto_status in
1298 let and_list,elems,last =
1301 | (m,s,_,don,gl,fail)::tl ->
1304 (fun (id,d,_ as g) ->
1305 match calculate_goal_ty g s m with
1306 | Some (_,x) -> Some (id,x,d) | None -> None)
1310 (* these are the S goalsin the or list *)
1313 (fun (m,s,_,don,gl,fail) ->
1315 (function S (g,k,c,_) -> Some (g,k,c) | _ -> None)
1316 (List.rev don @ gl))
1319 (* this function eats id from a list l::[id,x] returning x, l *)
1320 let eat_tail_if_eq id l =
1321 let rec aux (s, l) = function
1323 | ((id1,_,_),k1,c)::tl when id = id1 ->
1325 | None -> aux (Some c,l) tl
1326 | Some _ -> assert false)
1327 | ((id1,_,_),k1,c as e)::tl -> aux (s, e::l) tl
1329 let c, l = aux (None, []) l in
1332 let eat_in_parallel id l =
1333 let rec aux (b,eaten, new_l as acc) l =
1337 match eat_tail_if_eq id l with
1338 | None, l -> aux (b@[false], eaten, new_l@[l]) tl
1339 | Some t,l -> aux (b@[true],eaten@[t], new_l@[l]) tl
1343 let rec eat_all rows l =
1347 match List.rev elem with
1348 | ((to_eat,depth,_),k,_)::next_lunch ->
1349 let b, eaten, l = eat_in_parallel to_eat l in
1350 let eaten = HExtlib.list_uniq eaten in
1351 let eaten = List.rev eaten in
1352 let b = true (* List.hd (List.rev b) *) in
1353 let rows = rows @ [to_eat,k,b,depth,eaten] in
1355 | [] -> eat_all rows or_list
1357 eat_all [] (List.rev orlist)
1361 (function (S (_,_,(_,c),_)) -> Some c | _ -> None)
1364 (* let rows = List.filter (fun (_,l) -> l <> []) rows in *)
1365 and_list, rows, history
1367 !auto_context, elems, and_list, last
1370 (* Works if there is no dependency over proofs *)
1371 let is_a_green_cut goalty =
1372 CicUtil.is_meta_closed goalty
1374 let rec first_s = function
1375 | (D _)::tl -> first_s tl
1376 | (S (g,k,c,s))::tl -> Some ((g,k,c,s),tl)
1379 let list_union l1 l2 =
1380 (* TODO ottimizzare compare *)
1381 HExtlib.list_uniq (List.sort compare (l1 @ l1))
1383 let rec eq_todo l1 l2 =
1385 | (D g1) :: tl1,(D g2) :: tl2 when g1=g2 -> eq_todo tl1 tl2
1386 | (S (g1,k1,(c1,lt1),i1)) :: tl1, (S (g2,k2,(c2,lt2),i2)) :: tl2
1387 when i1 = i2 && g1 = g2 && k1 = k2 && c1 = c2 ->
1388 if Lazy.force lt1 = Lazy.force lt2 then eq_todo tl1 tl2 else false
1392 let eat_head todo id fl orlist =
1393 let rec aux acc = function
1395 | (m, s, _, _, todo1, fl1)::tl as orlist ->
1396 let rec aux1 todo1 =
1397 match first_s todo1 with
1398 | None -> orlist, acc
1399 | Some (((gno,_,_),_,_,_), todo11) ->
1400 (* TODO confronto tra todo da ottimizzare *)
1401 if gno = id && eq_todo todo11 todo then
1402 aux (list_union fl1 acc) tl
1410 let close_proof p ty menv context =
1412 List.map fst (CicUtil.metas_of_term p @ CicUtil.metas_of_term ty)
1414 let menv = List.filter (fun (i,_,_) -> List.exists ((=)i) metas) menv in
1415 naif_closure p menv context
1417 (* XXX capire bene quando aggiungere alla cache *)
1418 let add_to_cache_and_del_from_orlist_if_green_cut
1419 g s m cache key todo orlist fl ctx size minsize
1421 let cache = cache_remove_underinspection cache key in
1422 (* prima per fare la irl usavamo il contesto vero e proprio e non quello
1424 match calculate_closed_goal_ty g s with
1425 | None -> assert false
1426 | Some (canonical_ctx , gty) ->
1427 let goalno,depth,sort = g in
1428 let irl = mk_irl canonical_ctx in
1429 let goal = Cic.Meta(goalno, irl) in
1430 let proof = CicMetaSubst.apply_subst s goal in
1431 let green_proof, closed_proof =
1432 let b = is_a_green_cut proof in
1434 b, (* close_proof proof gty m ctx *) proof
1438 debug_print (lazy ("TENTATIVE CACHE: " ^ CicPp.ppterm key));
1439 if is_a_green_cut key then
1440 (* if the initia goal was closed, we cut alternatives *)
1441 let _ = debug_print (lazy ("MANGIO: " ^ string_of_int goalno)) in
1442 let orlist, fl = eat_head todo goalno fl orlist in
1444 if size < minsize then
1445 (debug_print (lazy ("NO CACHE: 2 (size <= minsize)"));cache)
1447 (* if the proof is closed we cache it *)
1448 if green_proof then cache_add_success cache key proof
1449 else (* cache_add_success cache key closed_proof *)
1450 (debug_print (lazy ("NO CACHE: (no gree proof)"));cache)
1452 cache, orlist, fl, true
1455 debug_print (lazy ("TENTATIVE CACHE: " ^ CicPp.ppterm gty));
1456 if size < minsize then
1457 (debug_print (lazy ("NO CACHE: (size <= minsize)")); cache) else
1458 (* if the substituted goal and the proof are closed we cache it *)
1459 if is_a_green_cut gty then
1460 if green_proof then cache_add_success cache gty proof
1461 else (* cache_add_success cache gty closed_proof *)
1462 (debug_print (lazy ("NO CACHE: (no green proof (gty))"));cache)
1466 CicTypeChecker.type_of_aux' ~subst:s
1467 m ctx closed_proof CicUniv.oblivion_ugraph
1469 if is_a_green_cut ty then
1470 cache_add_success cache ty closed_proof
1473 | CicTypeChecker.TypeCheckerFailure _ ->*)
1474 (debug_print (lazy ("NO CACHE: (no green gty )"));cache)
1476 cache, orlist, fl, false
1478 let close_failures (fl : fail list) (cache : cache) =
1480 (fun cache ((gno,depth,_),gty) ->
1481 if CicUtil.is_meta_closed gty then
1482 ( debug_print (lazy ("FAIL: INDUCED: " ^ string_of_int gno));
1483 cache_add_failure cache gty depth)
1488 let put_in_subst subst metasenv (goalno,_,_) canonical_ctx t ty =
1489 let entry = goalno, (canonical_ctx, t,ty) in
1490 assert_subst_are_disjoint subst [entry];
1491 let subst = entry :: subst in
1493 let metasenv = CicMetaSubst.apply_subst_metasenv subst metasenv in
1498 let mk_fake_proof metasenv subst (goalno,_,_) goalty context =
1499 None,metasenv,subst ,(lazy (Cic.Meta(goalno,mk_irl context))),goalty, []
1503 tables cache depth fake_proof goalno goalty subst context
1506 let active,passive,bag = tables in
1507 let ppterm = ppterm context in
1508 let status = (fake_proof,goalno) in
1509 if flags.use_only_paramod then
1511 debug_print (lazy ("PARAMODULATION SU: " ^
1512 string_of_int goalno ^ " " ^ ppterm goalty ));
1513 let goal_steps, saturation_steps, timeout =
1514 max_int,max_int,flags.timeout
1517 Saturation.given_clause bag status active passive
1518 goal_steps saturation_steps timeout
1520 | None, active, passive, bag ->
1521 [], (active,passive,bag), cache, flags
1522 | Some(subst',(_,metasenv,_subst,proof,_, _),open_goals),active,
1524 assert_subst_are_disjoint subst subst';
1525 let subst = subst@subst' in
1527 order_new_goals metasenv subst open_goals ppterm
1530 List.map (fun (x,sort) -> x,depth-1,sort) open_goals
1533 [(!candidate_no,proof),metasenv,subst,open_goals],
1534 (active,passive,bag), cache, flags
1538 debug_print (lazy ("NARROWING DEL GOAL: " ^
1539 string_of_int goalno ^ " " ^ ppterm goalty ));
1540 let goal_steps, saturation_steps, timeout =
1544 Saturation.solve_narrowing bag status active passive goal_steps
1546 | None, active, passive, bag ->
1547 [], (active,passive,bag), cache, flags
1548 | Some(subst',(_,metasenv,_subst,proof,_, _),open_goals),active,
1550 assert_subst_are_disjoint subst subst';
1551 let subst = subst@subst' in
1553 order_new_goals metasenv subst open_goals ppterm
1556 List.map (fun (x,sort) -> x,depth-1,sort) open_goals
1559 [(!candidate_no,proof),metasenv,subst,open_goals],
1560 (active,passive,bag), cache, flags
1564 let params = ([],["use_context","false"]) in
1565 let automation_cache = {
1566 AutomationCache.tables = tables ;
1567 AutomationCache.univ = Universe.empty; }
1570 let ((_,metasenv,subst,_,_,_),open_goals) =
1572 solve_rewrite ~params ~automation_cache
1573 (fake_proof, goalno)
1575 let proof = lazy (Cic.Meta (-1,[])) in
1576 [(!candidate_no,proof),metasenv,subst,[]],tables, cache, flags
1577 with ProofEngineTypes.Fail _ -> [], tables, cache, flags
1579 let res = Saturation.all_subsumed bag status active passive in
1582 (fun (subst',(_,metasenv,_subst,proof,_, _),open_goals) ->
1583 assert_subst_are_disjoint subst subst';
1584 let subst = subst@subst' in
1586 order_new_goals metasenv subst open_goals ppterm
1589 List.map (fun (x,sort) -> x,depth-1,sort) open_goals
1592 (!candidate_no,proof),metasenv,subst,open_goals)
1595 res', (active,passive,bag), cache, flags
1601 let sort_new_elems =
1602 List.sort (fun (_,_,_,l1) (_,_,_,l2) ->
1603 let p1 = List.length (prop_only l1) in
1604 let p2 = List.length (prop_only l2) in
1605 if p1 = p2 then List.length l1 - List.length l2 else p1-p2)
1609 let try_candidate dbd
1610 goalty tables subst fake_proof goalno depth context cand
1612 let ppterm = ppterm context in
1614 let actives, passives, bag = tables in
1615 let (_,metasenv,subst,_,_,_), open_goals =
1616 ProofEngineTypes.apply_tactic
1617 (PrimitiveTactics.apply_tac ~term:cand)
1620 let tables = actives, passives,
1621 Equality.push_maxmeta bag
1622 (max (Equality.maxmeta bag) (CicMkImplicit.new_meta metasenv subst))
1624 debug_print (lazy (" OK: " ^ ppterm cand));
1625 let metasenv = CicRefine.pack_coercion_metasenv metasenv in
1626 let open_goals = order_new_goals metasenv subst open_goals ppterm in
1627 let open_goals = List.map (fun (x,sort) -> x,depth-1,sort) open_goals in
1629 Some ((!candidate_no,lazy cand),metasenv,subst,open_goals), tables
1631 | ProofEngineTypes.Fail s -> None,tables
1632 | CicUnification.Uncertain s -> None,tables
1635 let applicative_case dbd
1636 tables depth subst fake_proof goalno goalty metasenv context
1637 signature universe cache flags
1641 | Cic.Appl (hd::tl) ->
1642 Cic.Appl (hd :: HExtlib.mk_list (Cic.Meta (0,[])) (List.length tl))
1645 let goalty_aux = goalty in
1647 get_candidates flags.skip_trie_filtering universe cache goalty_aux
1649 (* if the goal is an equality we skip the congruence theorems
1651 if is_equational_case goalty flags
1652 then List.filter not_default_eq_term candidates
1655 let candidates = List.filter (only signature context metasenv) candidates
1659 (fun (tables,elems) cand ->
1661 try_candidate dbd goalty
1662 tables subst fake_proof goalno depth context cand
1664 | None, tables -> tables, elems
1665 | Some x, tables -> tables, x::elems)
1666 (tables,[]) candidates
1668 let elems = sort_new_elems elems in
1669 elems, tables, cache
1672 let try_smart_candidate dbd
1673 goalty tables subst fake_proof goalno depth context cand
1675 let ppterm = ppterm context in
1677 let params = (None,[]) in
1678 let automation_cache = {
1679 AutomationCache.tables = tables ;
1680 AutomationCache.univ = Universe.empty; }
1682 debug_print (lazy ("candidato per " ^ string_of_int goalno
1683 ^ ": " ^ CicPp.ppterm cand));
1685 let (_,metasenv,subst,_,_,_) = fake_proof in
1686 prerr_endline ("metasenv:\n" ^ CicMetaSubst.ppmetasenv [] metasenv);
1687 prerr_endline ("subst:\n" ^ CicMetaSubst.ppsubst ~metasenv subst);
1689 let ((_,metasenv,subst,_,_,_),open_goals) =
1690 apply_smart ~dbd ~term:cand ~params ~automation_cache
1691 (fake_proof, goalno)
1693 let metasenv = CicRefine.pack_coercion_metasenv metasenv in
1694 let open_goals = order_new_goals metasenv subst open_goals ppterm in
1695 let open_goals = List.map (fun (x,sort) -> x,depth-1,sort) open_goals in
1697 Some ((!candidate_no,lazy cand),metasenv,subst,open_goals), tables
1699 | ProofEngineTypes.Fail s -> None,tables
1700 | CicUnification.Uncertain s -> None,tables
1703 let smart_applicative_case dbd
1704 tables depth subst fake_proof goalno goalty metasenv context signature
1705 universe cache flags
1709 | Cic.Appl (hd::tl) ->
1710 Cic.Appl (hd :: HExtlib.mk_list (Cic.Meta (0,[])) (List.length tl))
1713 let smart_candidates =
1714 get_candidates flags.skip_trie_filtering universe cache goalty_aux
1717 get_candidates flags.skip_trie_filtering universe cache goalty
1719 let smart_candidates =
1721 (fun x -> not(List.mem x candidates)) smart_candidates
1724 (lazy ("smart_candidates" ^ " = " ^
1725 (String.concat "\n" (List.map CicPp.ppterm smart_candidates)))) in
1726 debug_print debug_msg;
1727 let candidates = List.filter (only signature context metasenv) candidates in
1728 let smart_candidates =
1729 List.filter (only signature context metasenv) smart_candidates
1732 let penalty cand depth =
1733 if only signature context metasenv cand then depth else ((prerr_endline (
1734 "penalizzo " ^ CicPp.ppterm cand));depth -1)
1739 (fun (tables,elems) cand ->
1741 try_candidate dbd goalty
1742 tables subst fake_proof goalno depth context cand
1745 (* if normal application fails we try to be smart *)
1746 (match try_smart_candidate dbd goalty
1747 tables subst fake_proof goalno depth context cand
1749 | None, tables -> tables, elems
1750 | Some x, tables -> tables, x::elems)
1751 | Some x, tables -> tables, x::elems)
1752 (tables,[]) candidates
1754 let tables, smart_elems =
1756 (fun (tables,elems) cand ->
1758 try_smart_candidate dbd goalty
1759 tables subst fake_proof goalno depth context cand
1761 | None, tables -> tables, elems
1762 | Some x, tables -> tables, x::elems)
1763 (tables,[]) smart_candidates
1765 let elems = sort_new_elems (elems @ smart_elems) in
1766 elems, tables, cache
1769 let equational_and_applicative_case dbd
1770 signature universe flags m s g gty tables cache context
1772 let goalno, depth, sort = g in
1773 let fake_proof = mk_fake_proof m s g gty context in
1774 if is_equational_case gty flags then
1775 let elems,tables,cache, flags =
1776 equational_case tables cache
1777 depth fake_proof goalno gty s context flags
1779 let more_elems, tables, cache =
1780 if flags.use_only_paramod then
1783 applicative_case dbd
1784 tables depth s fake_proof goalno
1785 gty m context signature universe cache flags
1787 elems@more_elems, tables, cache, flags
1789 let elems, tables, cache =
1790 match LibraryObjects.eq_URI () with
1792 smart_applicative_case dbd tables depth s fake_proof goalno
1793 gty m context signature universe cache flags
1795 applicative_case dbd tables depth s fake_proof goalno
1796 gty m context signature universe cache flags
1798 elems, tables, cache, flags
1800 let rec condition_for_hint i = function
1802 | S (_,_,(j,_),_):: tl -> j <> i (* && condition_for_hint i tl *)
1803 | _::tl -> condition_for_hint i tl
1805 let remove_s_from_fl (id,_,_) (fl : fail list) =
1806 let rec aux = function
1808 | ((id1,_,_),_)::tl when id = id1 -> tl
1809 | hd::tl -> hd :: aux tl
1814 let prunable_for_size flags s m todo =
1815 let rec aux b = function
1816 | (S _)::tl -> aux b tl
1817 | (D (_,_,T))::tl -> aux b tl
1819 (match calculate_goal_ty g s m with
1821 | Some (canonical_ctx, gty) ->
1823 Utils.weight_of_term
1824 ~consider_metas:false ~count_metas_occurrences:true gty in
1825 let newb = b || gsize > flags.maxgoalsizefactor in
1832 let prunable ty todo =
1833 let rec aux b = function
1834 | (S(_,k,_,_))::tl -> aux (b || Equality.meta_convertibility k ty) tl
1835 | (D (_,_,T))::tl -> aux b tl
1843 let prunable menv subst ty todo =
1844 let rec aux = function
1845 | (S(_,k,_,_))::tl ->
1846 (match Equality.meta_convertibility_subst k ty menv with
1849 no_progress variant tl (* || aux tl*))
1850 | (D (_,_,T))::tl -> aux tl
1852 and no_progress variant = function
1853 | [] -> (*prerr_endline "++++++++++++++++++++++++ no_progress";*) true
1854 | D ((n,_,P) as g)::tl ->
1855 (match calculate_goal_ty g subst menv with
1856 | None -> no_progress variant tl
1858 (match calculate_goal_ty g variant menv with
1859 | None -> assert false
1861 if gty = gty' then no_progress variant tl
1863 (prerr_endline (string_of_int n);
1864 prerr_endline (CicPp.ppterm gty);
1865 prerr_endline (CicPp.ppterm gty');
1866 prerr_endline "---------- subst";
1867 prerr_endline (CicMetaSubst.ppsubst ~metasenv:menv subst);
1868 prerr_endline "---------- variant";
1869 prerr_endline (CicMetaSubst.ppsubst ~metasenv:menv variant);
1870 prerr_endline "---------- menv";
1871 prerr_endline (CicMetaSubst.ppmetasenv [] menv);
1872 no_progress variant tl) *)
1874 | _::tl -> no_progress variant tl
1879 let condition_for_prune_hint prune (m, s, size, don, todo, fl) =
1881 HExtlib.filter_map (function S (_,_,(c,_),_) -> Some c | _ -> None) todo
1883 List.for_all (fun i -> List.for_all (fun j -> i<>j) prune) s
1885 let filter_prune_hint c l =
1886 let prune = !prune_hint in
1887 prune_hint := []; (* possible race... *)
1888 if prune = [] then c,l
1890 cache_reset_underinspection c,
1891 List.filter (condition_for_prune_hint prune) l
1894 let auto_main dbd tables context flags signature universe cache elems =
1895 auto_context := context;
1896 let rec aux tables flags cache (elems : status) =
1897 pp_status context elems;
1898 (* DEBUGGING CODE: uncomment these two lines to stop execution at each iteration
1899 auto_status := elems;
1902 let cache, elems = filter_prune_hint cache elems in
1904 | (m, s, size, don, todo, fl)::orlist when !hint <> None ->
1905 debug_print (lazy "skip");
1907 | Some i when condition_for_hint i todo ->
1908 aux tables flags cache orlist
1911 aux tables flags cache elems)
1913 (* complete failure *)
1914 debug_print (lazy "give up");
1915 Gaveup (tables, cache)
1916 | (m, s, _, _, [],_)::orlist ->
1917 (* complete success *)
1918 debug_print (lazy "success");
1919 Proved (m, s, orlist, tables, cache)
1920 | (m, s, size, don, (D (_,_,T))::todo, fl)::orlist
1921 when not flags.AutoTypes.do_types ->
1922 (* skip since not Prop, don't even check if closed by side-effect *)
1923 debug_print (lazy "skip existential goal");
1924 aux tables flags cache ((m, s, size, don, todo, fl)::orlist)
1925 | (m, s, size, don, (S(g, key, c,minsize) as op)::todo, fl)::orlist ->
1926 (* partial success, cache g and go on *)
1927 let cache, orlist, fl, sibling_pruned =
1928 add_to_cache_and_del_from_orlist_if_green_cut
1929 g s m cache key todo orlist fl context size minsize
1931 debug_print (lazy (AutoCache.cache_print context cache));
1932 let fl = remove_s_from_fl g fl in
1933 let don = if sibling_pruned then don else op::don in
1934 aux tables flags cache ((m, s, size, don, todo, fl)::orlist)
1935 | (m, s, size, don, todo, fl)::orlist
1936 when List.length(prop_only (d_goals todo)) > flags.maxwidth ->
1937 debug_print (lazy ("FAIL: WIDTH"));
1938 (* too many goals in and generated by last th *)
1939 let cache = close_failures fl cache in
1940 aux tables flags cache orlist
1941 | (m, s, size, don, todo, fl)::orlist when size > flags.maxsize ->
1943 (lazy ("FAIL: SIZE: "^string_of_int size ^
1944 " > " ^ string_of_int flags.maxsize ));
1945 (* we already have a too large proof term *)
1946 let cache = close_failures fl cache in
1947 aux tables flags cache orlist
1948 | _ when Unix.gettimeofday () > flags.timeout ->
1950 debug_print (lazy ("FAIL: TIMEOUT"));
1951 Gaveup (tables, cache)
1952 | (m, s, size, don, (D (gno,depth,_ as g))::todo, fl)::orlist as status ->
1954 debug_print (lazy "attack goal");
1955 match calculate_goal_ty g s m with
1957 (* closed by side effect *)
1958 debug_print (lazy ("SUCCESS: SIDE EFFECT: " ^ string_of_int gno));
1959 aux tables flags cache ((m,s,size,don,todo, fl)::orlist)
1960 | Some (canonical_ctx, gty) ->
1962 Utils.weight_of_term ~consider_metas:false ~count_metas_occurrences:true gty
1964 if gsize > flags.maxgoalsizefactor then
1965 (debug_print (lazy ("FAIL: SIZE: goal: "^string_of_int gsize));
1966 aux tables flags cache orlist)
1967 else if prunable_for_size flags s m todo then
1968 (debug_print (lazy ("POTO at depth: "^(string_of_int depth)));
1969 aux tables flags cache orlist)
1971 (* still to be proved *)
1972 (debug_print (lazy ("EXAMINE: "^CicPp.ppterm gty));
1973 match cache_examine cache gty with
1974 | Failed_in d when d >= depth ->
1976 debug_print (lazy ("FAIL: DEPTH (cache): "^string_of_int gno));
1977 let cache = close_failures fl cache in
1978 aux tables flags cache orlist
1979 | UnderInspection ->
1981 debug_print (lazy ("FAIL: LOOP: " ^ string_of_int gno));
1982 let cache = close_failures fl cache in
1983 aux tables flags cache orlist
1985 debug_print (lazy ("SUCCESS: CACHE HIT: " ^ string_of_int gno));
1986 let s, m = put_in_subst s m g canonical_ctx t gty in
1987 aux tables flags cache ((m, s, size, don,todo, fl)::orlist)
1989 | Failed_in _ when depth > 0 ->
1990 ( (* more depth or is the first time we see the goal *)
1991 if prunable m s gty todo then
1993 "FAIL: LOOP: one father is equal"));
1994 aux tables flags cache orlist)
1996 let cache = cache_add_underinspection cache gty depth in
1997 auto_status := status;
2000 (lazy ("INSPECTING: " ^
2001 string_of_int gno ^ "("^ string_of_int size ^ "): "^
2003 (* elems are possible computations for proving gty *)
2004 let elems, tables, cache, flags =
2005 equational_and_applicative_case dbd
2006 signature universe flags m s g gty tables cache context
2009 (* this goal has failed *)
2010 let cache = close_failures ((g,gty)::fl) cache in
2011 aux tables flags cache orlist
2013 (* elems = (cand,m,s,gl) *)
2014 let size_gl l = List.length
2015 (List.filter (function (_,_,P) -> true | _ -> false) l)
2018 let inj_gl gl = List.map (fun g -> D g) gl in
2019 let rec map = function
2020 | [] -> assert false
2021 | (cand,m,s,gl)::[] ->
2022 (* in the last one we add the failure *)
2024 inj_gl gl @ (S(g,gty,cand,size+1))::todo
2026 (* we are the last in OR, we fail on g and
2027 * also on all failures implied by g *)
2028 (m,s, size + size_gl gl, don, todo, (g,gty)::fl)
2030 | (cand,m,s,gl)::tl ->
2031 (* we add the S step after gl and before todo *)
2033 inj_gl gl @ (S(g,gty,cand,size+1))::todo
2035 (* since we are not the last in OR, we do not
2037 (m,s, size + size_gl gl, don, todo, []) :: map tl
2041 aux tables flags cache elems)
2044 debug_print (lazy ("FAIL: DEPTH: " ^ string_of_int gno));
2045 let cache = close_failures fl cache in
2046 aux tables flags cache orlist)
2048 (aux tables flags cache elems : auto_result)
2053 auto_all_solutions dbd tables universe cache context metasenv gl flags
2058 MetadataConstraints.UriManagerSet.union set
2059 (MetadataQuery.signature_of metasenv g)
2061 MetadataConstraints.UriManagerSet.empty gl
2063 let goals = order_new_goals metasenv [] gl CicPp.ppterm in
2066 (fun (x,s) -> D (x,flags.maxdepth,s)) goals
2068 let elems = [metasenv,[],1,[],goals,[]] in
2069 let rec aux tables solutions cache elems flags =
2070 match auto_main dbd tables context flags signature universe cache elems with
2071 | Gaveup (tables,cache) ->
2072 solutions,cache, tables
2073 | Proved (metasenv,subst,others,tables,cache) ->
2074 if Unix.gettimeofday () > flags.timeout then
2075 ((subst,metasenv)::solutions), cache, tables
2077 aux tables ((subst,metasenv)::solutions) cache others flags
2079 let rc = aux tables [] cache elems flags in
2081 | [],cache,tables -> [],cache,tables
2082 | solutions, cache,tables ->
2085 (fun (subst,newmetasenv) ->
2087 ProofEngineHelpers.compare_metasenvs ~oldmetasenv:metasenv ~newmetasenv
2089 if opened = [] then Some subst else None)
2092 solutions,cache,tables
2095 (******************* AUTO ***************)
2098 let auto dbd flags metasenv tables universe cache context metasenv gl =
2099 let initial_time = Unix.gettimeofday() in
2103 MetadataConstraints.UriManagerSet.union set
2104 (MetadataQuery.signature_of metasenv g)
2106 MetadataConstraints.UriManagerSet.empty gl
2108 let goals = order_new_goals metasenv [] gl CicPp.ppterm in
2109 let goals = List.map (fun (x,s) -> D(x,flags.maxdepth,s)) goals in
2110 let elems = [metasenv,[],1,[],goals,[]] in
2111 match auto_main dbd tables context flags signature universe cache elems with
2112 | Proved (metasenv,subst,_, tables,cache) ->
2114 ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time)));
2115 Some (subst,metasenv), cache
2116 | Gaveup (tables,cache) ->
2118 ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time)));
2122 let auto_tac ~(dbd:HSql.dbd) ~params:(univ,params) ~automation_cache (proof, goal) =
2123 let flags = flags_of_params params () in
2124 let use_library = flags.use_library in
2125 let universe, tables, cache =
2126 init_cache_and_tables
2127 ~dbd ~use_library ~use_context:(not flags.skip_context)
2128 automation_cache univ (proof, goal)
2130 let _,metasenv,subst,_,_, _ = proof in
2131 let _,context,goalty = CicUtil.lookup_meta goal metasenv in
2132 let signature = MetadataQuery.signature_of metasenv goal in
2140 CicTypeChecker.type_of_aux' metasenv context t
2141 CicUniv.oblivion_ugraph
2143 MetadataConstraints.UriManagerSet.union set
2144 (MetadataConstraints.constants_of ty)
2149 if flags.close_more then
2151 tables context (proof, goal)
2152 (auto_all_solutions dbd) signature universe cache
2153 else tables,cache in
2154 let initial_time = Unix.gettimeofday() in
2155 let (_,oldmetasenv,_,_,_, _) = proof in
2158 metasenv,subst,1,[],[D (goal,flags.maxdepth,P)],[]
2160 match auto_main dbd tables context flags signature universe cache [elem] with
2161 | Proved (metasenv,subst,_, tables,cache) ->
2163 ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time)));
2164 let proof,metasenv =
2165 ProofEngineHelpers.subst_meta_and_metasenv_in_proof
2166 proof goal subst metasenv
2169 ProofEngineHelpers.compare_metasenvs ~oldmetasenv
2170 ~newmetasenv:metasenv
2173 | Gaveup (tables,cache) ->
2176 string_of_float(Unix.gettimeofday()-.initial_time)));
2177 raise (ProofEngineTypes.Fail (lazy "Auto gave up"))
2180 let auto_tac ~dbd ~params ~automation_cache =
2181 ProofEngineTypes.mk_tactic (auto_tac ~params ~dbd ~automation_cache);;
2183 let pp_proofterm = Equality.pp_proofterm;;
2185 let revision = "$Revision$";;
2186 let size_and_depth context metasenv t = 100, 100