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
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
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);;
33 type auto_params = Cic.term list * (string * string) list
37 (* closing a term w.r.t. its metavariables
38 very naif version: it does not take dependencies properly into account *)
40 let naif_closure ?(prefix_name="xxx_") t metasenv context =
41 let metasenv = ProofEngineHelpers.sort_metasenv metasenv in
42 let n = List.length metasenv in
43 let what = List.map (fun (i,cc,ty) -> Cic.Meta(i,[])) metasenv in
46 (fun (i,acc) (_,cc,ty) -> (i-1,Cic.Rel i::acc))
49 let t = CicSubstitution.lift n t in
51 ProofEngineReduction.replace_lifting
52 ~equality:(fun c t1 t2 ->
54 | Cic.Meta(i,_),Cic.Meta(j,_) -> i = j
56 ~context ~what ~with_what ~where:t
60 (fun (n,t) (_,cc,ty) ->
61 n-1, Cic.Lambda(Cic.Name (prefix_name^string_of_int n),
62 CicSubstitution.lift n ty,t))
68 let lambda_close ?prefix_name t menv ctx =
69 let t = naif_closure ?prefix_name t menv ctx in
71 (fun (t,i) -> function
72 | None -> CicSubstitution.subst (Cic.Implicit None) t,i (* delift *)
73 | Some (name, Cic.Decl ty) -> Cic.Lambda (name, ty, t),i+1
74 | Some (name, Cic.Def (bo, ty)) -> Cic.LetIn (name, bo, ty, t),i+1)
75 (t,List.length menv) ctx
78 (* functions for retrieving theorems *)
80 exception FillingFailure of AutoCache.cache * int
82 let rec unfold context = function
83 | Cic.Prod(name,s,t) ->
84 let t' = unfold ((Some (name,Cic.Decl s))::context) t in
86 | t -> ProofEngineReduction.unfold context t
88 let find_library_theorems dbd proof goal =
89 let univ = MetadataQuery.universe_of_goal ~dbd false proof goal in
90 let terms = List.map CicUtil.term_of_uri univ in
93 (t,fst(CicTypeChecker.type_of_aux' [] [] t CicUniv.oblivion_ugraph)))
96 let find_context_theorems context metasenv =
99 (fun (res,i) ctxentry ->
101 | Some (_,Cic.Decl t) ->
102 (Cic.Rel i, CicSubstitution.lift i t)::res,i+1
103 | Some (_,Cic.Def (_,t)) ->
104 (Cic.Rel i, CicSubstitution.lift i t)::res,i+1
109 let rec is_an_equality = function
110 | Cic.Appl [Cic.MutInd (uri, _, _); _; _; _]
111 when (LibraryObjects.is_eq_URI uri) -> true
112 | Cic.Prod (_, _, t) -> is_an_equality t
116 let partition_equalities =
117 List.partition (fun (_,ty) -> is_an_equality ty)
120 let default_auto maxm _ _ cache _ _ _ _ = [],cache,maxm ;;
123 let is_unit_equation context metasenv oldnewmeta term =
124 let head, metasenv, args, newmeta =
125 TermUtil.saturate_term oldnewmeta metasenv context term 0
127 let propositional_args =
131 let _,_,mt = CicUtil.lookup_meta i metasenv in
133 CicTypeChecker.type_of_aux' metasenv context mt
134 CicUniv.oblivion_ugraph
137 CicReduction.are_convertible ~metasenv context
138 sort (Cic.Sort Cic.Prop) u
140 if b then Some i else None
144 if propositional_args = [] then
146 List.filter (fun (i,_,_) -> i >= oldnewmeta) metasenv
148 Some (args,metasenv,newmetas,head,newmeta)
152 let get_candidates universe cache t =
154 (Universe.get_candidates universe t)@(AutoCache.get_candidates cache t)
157 (lazy ("candidates for " ^ (CicPp.ppterm t) ^ " = " ^
158 (String.concat "\n" (List.map CicPp.ppterm candidates)))) in
159 debug_print debug_msg;
163 let only signature context metasenv t =
166 CicTypeChecker.type_of_aux' metasenv context t CicUniv.oblivion_ugraph
168 let consts = MetadataConstraints.constants_of ty in
169 let b = MetadataConstraints.UriManagerSet.subset consts signature in
172 let ty' = unfold context ty in
173 let consts' = MetadataConstraints.constants_of ty' in
174 MetadataConstraints.UriManagerSet.subset consts' signature
176 | CicTypeChecker.TypeCheckerFailure _ -> assert false
177 | ProofEngineTypes.Fail _ -> false (* unfold may fail *)
180 let not_default_eq_term t =
182 let uri = CicUtil.uri_of_term t in
183 not (LibraryObjects.in_eq_URIs uri)
184 with Invalid_argument _ -> true
186 let retrieve_equations dont_filter signature universe cache context metasenv =
187 match LibraryObjects.eq_URI() with
190 let eq_uri = UriManager.strip_xpointer eq_uri in
191 let fake= Cic.Meta(-1,[]) in
192 let fake_eq = Cic.Appl [Cic.MutInd (eq_uri,0, []);fake;fake;fake] in
193 let candidates = get_candidates universe cache fake_eq in
194 if dont_filter then candidates
196 let candidates = List.filter not_default_eq_term candidates in
197 List.filter (only signature context metasenv) candidates
199 let build_equality bag head args proof newmetas maxmeta =
201 | Cic.Appl [Cic.MutInd (uri, _, _); ty; t1; t2] ->
203 if args = [] then proof else Cic.Appl (proof::args)
205 let o = !Utils.compare_terms t1 t2 in
206 let stat = (ty,t1,t2,o) in
207 (* let w = compute_equality_weight stat in *)
209 let proof = Equality.Exact p in
210 let e = Equality.mk_equality bag (w, proof, stat, newmetas) in
211 (* to clean the local context of metas *)
212 Equality.fix_metas bag maxmeta e
216 let partition_unit_equalities context metasenv newmeta bag equations =
218 (fun (units,other,maxmeta)(t,ty) ->
219 if not (CicUtil.is_meta_closed t && CicUtil.is_meta_closed ty) then
222 ("Skipping " ^ CicMetaSubst.ppterm_in_context ~metasenv [] t context
223 ^ " since it is not meta closed")
225 units,(t,ty)::other,maxmeta
227 match is_unit_equation context metasenv maxmeta ty with
228 | Some (args,metasenv,newmetas,head,newmeta') ->
229 let maxmeta,equality =
230 build_equality bag head args t newmetas newmeta' in
231 equality::units,other,maxmeta
233 units,(t,ty)::other,maxmeta)
234 ([],[],newmeta) equations
237 (Saturation.make_active [],
238 Saturation.make_passive [],
239 Equality.mk_equality_bag)
241 let init_cache_and_tables
242 ?dbd use_library paramod use_context dont_filter universe (proof, goal)
244 (* the local cache in initially empty *)
245 let cache = AutoCache.cache_empty in
246 let _, metasenv, _subst,_, _, _ = proof in
247 let signature = MetadataQuery.signature_of metasenv goal in
248 let newmeta = CicMkImplicit.new_meta metasenv [] in
249 let _,context,_ = CicUtil.lookup_meta goal metasenv in
250 let ct = if use_context then find_context_theorems context metasenv else [] in
252 (lazy ("ho trovato nel contesto " ^ (string_of_int (List.length ct))));
254 match use_library, dbd with
255 | true, Some dbd -> find_library_theorems dbd metasenv goal
259 (lazy ("ho trovato nella libreria " ^ (string_of_int (List.length lt))));
260 let cache = cache_add_list cache context (ct@lt) in
262 retrieve_equations dont_filter signature universe cache context metasenv
265 (lazy ("ho trovato equazioni n. "^(string_of_int (List.length equations))));
270 CicTypeChecker.type_of_aux'
271 metasenv context t CicUniv.oblivion_ugraph
273 (* retrieve_equations could also return flexible terms *)
274 if is_an_equality ty then Some(t,ty)
277 let ty' = unfold context ty in
278 if is_an_equality ty' then Some(t,ty') else None
279 with ProofEngineTypes.Fail _ -> None)
282 let bag = Equality.mk_equality_bag () in
283 let units, other_equalities, newmeta =
284 partition_unit_equalities context metasenv newmeta bag eqs_and_types
286 (* SIMPLIFICATION STEP
288 let env = (metasenv, context, CicUniv.oblivion_ugraph) in
289 let eq_uri = HExtlib.unopt (LibraryObjects.eq_URI()) in
290 Saturation.simplify_equalities bag eq_uri env units
293 let passive = Saturation.make_passive units in
294 let no = List.length units in
295 let active = Saturation.make_active [] in
296 let active,passive,newmeta =
297 if paramod then active,passive,newmeta
299 Saturation.pump_actives
300 context bag newmeta active passive (no+1) infinity
302 (active,passive,bag),cache,newmeta
304 let fill_hypothesis context metasenv oldnewmeta term tables (universe:Universe.universe) cache auto fast =
305 let head, metasenv, args, newmeta =
306 TermUtil.saturate_term oldnewmeta metasenv context term 0
308 let propositional_args =
312 let _,_,mt = CicUtil.lookup_meta i metasenv in
314 CicTypeChecker.type_of_aux' metasenv context mt
315 CicUniv.oblivion_ugraph
318 CicReduction.are_convertible ~metasenv context
319 sort (Cic.Sort Cic.Prop) u
321 if b then Some i else None
325 let results,cache,newmeta =
326 if propositional_args = [] then
327 let newmetas = List.filter (fun (i,_,_) -> i >= oldnewmeta) metasenv in
328 [args,metasenv,newmetas,head,newmeta],cache,newmeta
332 None,metasenv,term,term (* term non e' significativo *)
336 {AutoTypes.default_flags() with
337 AutoTypes.timeout = Unix.gettimeofday() +. 1.0;
338 maxwidth = 2;maxdepth = 2;
339 use_paramod=true;use_only_paramod=false}
341 {AutoTypes.default_flags() with
342 AutoTypes.timeout = Unix.gettimeofday() +. 1.0;
343 maxwidth = 2;maxdepth = 4;
344 use_paramod=true;use_only_paramod=false}
346 match auto newmeta tables universe cache context metasenv propositional_args flags with
347 | [],cache,newmeta -> raise (FillingFailure (cache,newmeta))
348 | substs,cache,newmeta ->
352 CicMetaSubst.apply_subst_metasenv subst metasenv
354 let head = CicMetaSubst.apply_subst subst head in
356 List.filter (fun (i,_,_) ->i >= oldnewmeta) metasenv
358 let args = List.map (CicMetaSubst.apply_subst subst) args in
359 let newm = CicMkImplicit.new_meta metasenv subst in
360 args,metasenv,newmetas,head,max newm newmeta)
361 substs, cache, newmeta
363 results,cache,newmeta
365 let build_equalities auto context metasenv tables universe cache newmeta equations =
367 (fun (facts,cache,newmeta) (t,ty) ->
368 (* in any case we add the equation to the cache *)
369 let cache = AutoCache.cache_add_list cache context [(t,ty)] in
371 let saturated,cache,newmeta =
372 fill_hypothesis context metasenv newmeta ty tables universe cache auto true
374 let (active,passive,bag) = tables in
375 let eqs,bag,newmeta =
377 (fun (acc,bag,newmeta) (args,metasenv,newmetas,head,newmeta') ->
378 let maxmeta,equality =
379 build_equality bag head args t newmetas newmeta'
381 equality::acc,bag,maxmeta)
382 ([],bag,newmeta) saturated
384 (eqs@facts, cache, newmeta)
385 with FillingFailure (cache,newmeta) ->
386 (* if filling hypothesis fails we add the equation to
388 (facts,cache,newmeta)
390 ([],cache,newmeta) equations
392 let close_more tables maxmeta context status auto universe cache =
393 let (active,passive,bag) = tables in
394 let proof, goalno = status in
395 let _, metasenv,_subst,_,_, _ = proof in
396 let signature = MetadataQuery.signature_of metasenv goalno in
398 retrieve_equations false signature universe cache context metasenv
404 CicTypeChecker.type_of_aux' metasenv context t
405 CicUniv.oblivion_ugraph in
406 (* retrieve_equations could also return flexible terms *)
407 if is_an_equality ty then Some(t,ty) else None)
409 let units, cache, maxm =
410 build_equalities auto context metasenv tables universe cache maxmeta eqs_and_types in
411 debug_print (lazy (">>>>>>> gained from a new context saturation >>>>>>>>>" ^
412 string_of_int maxm));
414 (fun e -> debug_print (lazy (Equality.string_of_equality e)))
416 debug_print (lazy ">>>>>>>>>>>>>>>>>>>>>>");
417 let passive = Saturation.add_to_passive units passive in
418 let no = List.length units in
419 debug_print (lazy ("No = " ^ (string_of_int no)));
420 let active,passive,newmeta =
421 Saturation.pump_actives context bag maxm active passive (no+1) infinity
423 (active,passive,bag),cache,newmeta
425 let find_context_equalities
426 maxmeta bag context proof (universe:Universe.universe) cache
428 let module C = Cic in
429 let module S = CicSubstitution in
430 let module T = CicTypeChecker in
431 let _,metasenv,_subst,_,_, _ = proof in
432 let newmeta = max (ProofEngineHelpers.new_meta_of_proof ~proof) maxmeta in
433 (* if use_auto is true, we try to close the hypothesis of equational
434 statements using auto; a naif, and probably wrong approach *)
435 let rec aux cache index newmeta = function
436 | [] -> [], newmeta,cache
437 | (Some (_, C.Decl (term)))::tl ->
440 (Printf.sprintf "Examining: %d (%s)" index (CicPp.ppterm term)));
441 let do_find context term =
443 | C.Prod (name, s, t) when is_an_equality t ->
446 let term = S.lift index term in
447 let saturated,cache,newmeta =
448 fill_hypothesis context metasenv newmeta term
449 empty_tables universe cache default_auto false
453 (fun (acc,newmeta) (args,metasenv,newmetas,head,newmeta') ->
454 let newmeta, equality =
456 bag head args (Cic.Rel index) newmetas (max newmeta newmeta')
458 equality::acc, newmeta + 1)
459 ([],newmeta) saturated
462 with FillingFailure (cache,newmeta) ->
464 | C.Appl [C.MutInd (uri, _, _); ty; t1; t2]
465 when LibraryObjects.is_eq_URI uri ->
466 let term = S.lift index term in
468 build_equality bag term [] (Cic.Rel index) [] newmeta
470 [e], (newmeta+1),cache
471 | _ -> [], newmeta, cache
473 let eqs, newmeta, cache = do_find context term in
474 let rest, newmeta,cache = aux cache (index+1) newmeta tl in
475 List.map (fun x -> index,x) eqs @ rest, newmeta, cache
477 aux cache (index+1) newmeta tl
479 let il, maxm, cache =
480 aux cache 1 newmeta context
482 let indexes, equalities = List.split il in
483 indexes, equalities, maxm, cache
486 (********** PARAMETERS PASSING ***************)
488 let bool params name default =
490 let s = List.assoc name params in
491 if s = "" || s = "1" || s = "true" || s = "yes" || s = "on" then true
492 else if s = "0" || s = "false" || s = "no" || s= "off" then false
494 let msg = "Unrecognized value for parameter "^name^"\n" in
495 let msg = msg^"Accepted values are 1,true,yes,on and 0,false,no,off" in
496 raise (ProofEngineTypes.Fail (lazy msg))
497 with Not_found -> default
500 let string params name default =
501 try List.assoc name params with
502 | Not_found -> default
505 let int params name default =
506 try int_of_string (List.assoc name params) with
507 | Not_found -> default
509 raise (ProofEngineTypes.Fail (lazy (name ^ " must be an integer")))
512 let flags_of_params params ?(for_applyS=false) () =
513 let int = int params in
514 let bool = bool params in
515 let close_more = bool "close_more" false in
516 let use_paramod = bool "use_paramod" true in
517 let use_only_paramod =
518 if for_applyS then true else bool "paramodulation" false in
519 let use_library = bool "library"
520 ((AutoTypes.default_flags()).AutoTypes.use_library) in
521 let depth = int "depth" ((AutoTypes.default_flags()).AutoTypes.maxdepth) in
522 let width = int "width" ((AutoTypes.default_flags()).AutoTypes.maxwidth) in
523 let size = int "size" ((AutoTypes.default_flags()).AutoTypes.maxsize) in
524 let gsize = int "gsize" ((AutoTypes.default_flags()).AutoTypes.maxgoalsizefactor) in
525 let do_type = bool "type" false in
526 let timeout = int "timeout" 0 in
527 { AutoTypes.maxdepth =
528 if use_only_paramod then 2 else depth;
529 AutoTypes.maxwidth = width;
530 AutoTypes.maxsize = size;
533 if for_applyS then Unix.gettimeofday () +. 30.0
537 Unix.gettimeofday() +. (float_of_int timeout);
538 AutoTypes.use_library = use_library;
539 AutoTypes.use_paramod = use_paramod;
540 AutoTypes.use_only_paramod = use_only_paramod;
541 AutoTypes.close_more = close_more;
542 AutoTypes.dont_cache_failures = false;
543 AutoTypes.maxgoalsizefactor = gsize;
544 AutoTypes.do_types = do_type;
547 let universe_of_params metasenv context universe tl =
548 if tl = [] then universe else
552 fst (CicTypeChecker.type_of_aux' metasenv context term
553 CicUniv.oblivion_ugraph))
556 Universe.index_list Universe.empty context (List.combine tl tys)
560 (***************** applyS *******************)
562 let new_metasenv_and_unify_and_t
563 dbd flags universe proof goal ?tables newmeta' metasenv'
564 context term' ty termty goal_arity
566 let (consthead,newmetasenv,arguments,_) =
567 TermUtil.saturate_term newmeta' metasenv' context termty goal_arity in
569 match arguments with [] -> term' | _ -> Cic.Appl (term'::arguments)
571 let proof',oldmetasenv =
572 let (puri,metasenv,_subst,pbo,pty, attrs) = proof in
573 (puri,newmetasenv,_subst,pbo,pty, attrs),metasenv
575 let goal_for_paramod =
576 match LibraryObjects.eq_URI () with
578 Cic.Appl [Cic.MutInd (uri,0,[]); Cic.Sort Cic.Prop; consthead; ty]
579 | None -> raise (ProofEngineTypes.Fail (lazy "No equality defined"))
581 let newmeta = CicMkImplicit.new_meta newmetasenv (*subst*) [] in
582 let metasenv_for_paramod = (newmeta,context,goal_for_paramod)::newmetasenv in
584 let uri,_,_subst,p,ty, attrs = proof' in
585 uri,metasenv_for_paramod,_subst,p,ty, attrs
587 let irl = CicMkImplicit.identity_relocation_list_for_metavariable context in
589 ProofEngineTypes.apply_tactic
590 (EqualityTactics.rewrite_tac ~direction:`RightToLeft
591 ~pattern:(ProofEngineTypes.conclusion_pattern None)
592 (Cic.Meta(newmeta,irl)) [])
595 let goal = match goals with [g] -> g | _ -> assert false in
597 ProofEngineTypes.apply_tactic
598 (PrimitiveTactics.apply_tac term'')
602 let (active, passive,bag), cache, maxmeta =
603 init_cache_and_tables ~dbd flags.use_library true true false universe
606 Saturation.given_clause bag maxmeta (proof'''',newmeta) active passive
607 max_int max_int flags.timeout
610 raise (ProofEngineTypes.Fail (lazy ("FIXME: propaga le tabelle")))
611 | Some (_,proof''''',_), active,passive,_ ->
613 ProofEngineHelpers.compare_metasenvs ~oldmetasenv
614 ~newmetasenv:(let _,m,_subst,_,_, _ = proof''''' in m), active, passive
617 let rec count_prods context ty =
618 match CicReduction.whd context ty with
619 Cic.Prod (n,s,t) -> 1 + count_prods (Some (n,Cic.Decl s)::context) t
623 ~dbd ~term ~subst ~universe ?tables ~params:(univ,params) (proof, goal)
625 let module T = CicTypeChecker in
626 let module R = CicReduction in
627 let module C = Cic in
628 let (_,metasenv,_subst,_,_, _) = proof in
629 let metano,context,ty = CicUtil.lookup_meta goal metasenv in
630 let flags = flags_of_params params ~for_applyS:true () in
631 let universe = universe_of_params metasenv context universe univ in
632 let newmeta = CicMkImplicit.new_meta metasenv subst in
633 let exp_named_subst_diff,newmeta',newmetasenvfragment,term' =
635 C.Var (uri,exp_named_subst) ->
636 let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
637 PrimitiveTactics.generalize_exp_named_subst_with_fresh_metas context newmeta uri
640 exp_named_subst_diff,newmeta',newmetasenvfragment,
641 C.Var (uri,exp_named_subst')
642 | C.Const (uri,exp_named_subst) ->
643 let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
644 PrimitiveTactics.generalize_exp_named_subst_with_fresh_metas context newmeta uri
647 exp_named_subst_diff,newmeta',newmetasenvfragment,
648 C.Const (uri,exp_named_subst')
649 | C.MutInd (uri,tyno,exp_named_subst) ->
650 let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
651 PrimitiveTactics.generalize_exp_named_subst_with_fresh_metas context newmeta uri
654 exp_named_subst_diff,newmeta',newmetasenvfragment,
655 C.MutInd (uri,tyno,exp_named_subst')
656 | C.MutConstruct (uri,tyno,consno,exp_named_subst) ->
657 let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
658 PrimitiveTactics.generalize_exp_named_subst_with_fresh_metas context newmeta uri
661 exp_named_subst_diff,newmeta',newmetasenvfragment,
662 C.MutConstruct (uri,tyno,consno,exp_named_subst')
663 | _ -> [],newmeta,[],term
665 let metasenv' = metasenv@newmetasenvfragment in
667 CicTypeChecker.type_of_aux' metasenv' context term' CicUniv.oblivion_ugraph
669 let termty = CicSubstitution.subst_vars exp_named_subst_diff termty in
670 let goal_arity = count_prods context ty in
671 let proof, gl, active, passive =
672 new_metasenv_and_unify_and_t dbd flags universe proof goal ?tables
673 newmeta' metasenv' context term' ty termty goal_arity
675 proof, gl, active, passive
678 (****************** AUTO ********************)
680 let mk_irl ctx = CicMkImplicit.identity_relocation_list_for_metavariable ctx;;
681 let ugraph = CicUniv.oblivion_ugraph;;
682 let typeof = CicTypeChecker.type_of_aux';;
684 let names = List.map (function None -> None | Some (x,_) -> Some x) ctx in
687 let is_in_prop context subst metasenv ty =
688 let sort,u = typeof ~subst metasenv context ty CicUniv.oblivion_ugraph in
689 fst (CicReduction.are_convertible context sort (Cic.Sort Cic.Prop) u)
692 let assert_proof_is_valid proof metasenv context goalty =
695 let ty,u = typeof metasenv context proof CicUniv.oblivion_ugraph in
696 let b,_ = CicReduction.are_convertible context ty goalty u in
700 List.map (function None -> None | Some (x,_) -> Some x) context
702 debug_print (lazy ("PROOF:" ^ CicPp.pp proof names));
703 debug_print (lazy ("PROOFTY:" ^ CicPp.pp ty names));
704 debug_print (lazy ("GOAL:" ^ CicPp.pp goalty names));
705 debug_print (lazy ("MENV:" ^ CicMetaSubst.ppmetasenv [] metasenv));
712 let assert_subst_are_disjoint subst subst' =
715 (fun (i,_) -> List.for_all (fun (j,_) -> i<>j) subst')
720 let split_goals_in_prop metasenv subst gl =
723 let _,context,ty = CicUtil.lookup_meta g metasenv in
725 let sort,u = typeof ~subst metasenv context ty ugraph in
727 CicReduction.are_convertible
728 ~subst ~metasenv context sort (Cic.Sort Cic.Prop) u in
731 | CicTypeChecker.AssertFailure s
732 | CicTypeChecker.TypeCheckerFailure s ->
734 (lazy ("NON TIPA" ^ ppterm context (CicMetaSubst.apply_subst subst ty)));
737 (* FIXME... they should type! *)
741 let split_goals_with_metas metasenv subst gl =
744 let _,context,ty = CicUtil.lookup_meta g metasenv in
745 let ty = CicMetaSubst.apply_subst subst ty in
746 CicUtil.is_meta_closed ty)
750 let order_new_goals metasenv subst open_goals ppterm =
751 let prop,rest = split_goals_in_prop metasenv subst open_goals in
752 let closed_prop, open_prop = split_goals_with_metas metasenv subst prop in
754 (List.map (fun x -> x,P) (closed_prop @ open_prop))
756 (List.map (fun x -> x,T) rest)
761 let _,_,ty = CicUtil.lookup_meta i metasenv in i,ty,sort) open_goals
763 debug_print (lazy (" OPEN: "^
767 | (i,t,P) -> string_of_int i ^ ":"^ppterm t^ "Prop"
768 | (i,t,T) -> string_of_int i ^ ":"^ppterm t^ "Type")
773 let is_an_equational_goal = function
774 | Cic.Appl [Cic.MutInd(u,_,_);_;_;_] when LibraryObjects.is_eq_URI u -> true
779 let prop = function (_,depth,P) -> depth < 9 | _ -> false;;
782 let calculate_timeout flags =
783 if flags.timeout = 0. then
784 (debug_print (lazy "AUTO WITH NO TIMEOUT");
785 {flags with timeout = infinity})
789 let is_equational_case goalty flags =
790 let ensure_equational t =
791 if is_an_equational_goal t then true
794 let msg="Not an equational goal.\nYou cant use the paramodulation flag"in
795 raise (ProofEngineTypes.Fail (lazy msg))
798 (flags.use_paramod && is_an_equational_goal goalty) ||
799 (flags.use_only_paramod && ensure_equational goalty)
802 let cache_add_success sort cache k v =
803 if sort = P then cache_add_success cache k v else cache_remove_underinspection
808 type menv = Cic.metasenv
809 type subst = Cic.substitution
810 type goal = ProofEngineTypes.goal * int * AutoTypes.sort
811 let candidate_no = ref 0;;
812 type candidate = int * Cic.term
813 type cache = AutoCache.cache
815 Saturation.active_table * Saturation.passive_table * Equality.equality_bag
818 (* the goal (mainly for depth) and key of the goal *)
819 goal * AutoCache.cache_key
821 (* goal has to be proved *)
823 (* goal has to be cached as a success obtained using candidate as the first
825 | S of goal * AutoCache.cache_key * candidate * int
827 (* menv, subst, size, operations done (only S), operations to do, failures to cache if any op fails *)
828 menv * subst * int * op list * op list * fail list
830 (* list of computations that may lead to the solution: all op list will
831 * end with the same (S(g,_)) *)
834 (* menv, subst, alternatives, tables, cache, maxmeta *)
835 | Proved of menv * subst * elem list * tables * cache * int
836 | Gaveup of tables * cache * int
839 (* the status exported to the external observer *)
841 (* context, (goal,candidate) list, and_list, history *)
842 Cic.context * (int * Cic.term * bool * int * (int * Cic.term) list) list *
843 (int * Cic.term * int) list * Cic.term list
846 let rec aux acc = function
847 | (D g)::tl -> aux (acc@[g]) tl
853 List.filter (function (_,_,P) -> true | _ -> false) l
857 let rec aux acc = function
858 | (D g)::tl -> aux (acc@[g]) tl
859 | (S _)::tl -> aux acc tl
864 let calculate_goal_ty (goalno,_,_) s m =
866 let _,cc,goalty = CicUtil.lookup_meta goalno m in
867 (* XXX applicare la subst al contesto? *)
868 Some (cc, CicMetaSubst.apply_subst s goalty)
869 with CicUtil.Meta_not_found i when i = goalno -> None
871 let calculate_closed_goal_ty (goalno,_,_) s =
873 let cc,_,goalty = List.assoc goalno s in
874 (* XXX applicare la subst al contesto? *)
875 Some (cc, CicMetaSubst.apply_subst s goalty)
876 with Not_found -> None
878 let pp_status ctx status =
880 let names = Utils.names_of_context ctx in
883 ProofEngineReduction.replace
884 ~equality:(fun a b -> match b with Cic.Meta _ -> true | _ -> false)
885 ~what:[Cic.Rel 1] ~with_what:[Cic.Implicit None] ~where:x
889 let string_of_do m s (gi,_,_ as g) d =
890 match calculate_goal_ty g s m with
891 | Some (_,gty) -> Printf.sprintf "D(%d, %s, %d)" gi (pp gty) d
892 | None -> Printf.sprintf "D(%d, _, %d)" gi d
894 let string_of_s m su k (ci,ct) gi =
895 Printf.sprintf "S(%d, %s, %s, %d)" gi (pp k) (pp ct) ci
897 let string_of_ol m su l =
901 | D (g,d,s) -> string_of_do m su (g,d,s) d
902 | S ((gi,_,_),k,c,_) -> string_of_s m su k c gi)
905 let string_of_fl m s fl =
907 (List.map (fun ((i,_,_),ty) ->
908 Printf.sprintf "(%d, %s)" i (pp ty)) fl)
910 let rec aux = function
912 | (m,s,_,_,ol,fl)::tl ->
913 Printf.eprintf "< [%s] ;;; [%s]>\n"
914 (string_of_ol m s ol) (string_of_fl m s fl);
917 Printf.eprintf "-------------------------- status -------------------\n";
919 Printf.eprintf "-----------------------------------------------------\n";
922 let auto_status = ref [] ;;
923 let auto_context = ref [];;
924 let in_pause = ref false;;
925 let pause b = in_pause := b;;
926 let cond = Condition.create ();;
927 let mutex = Mutex.create ();;
928 let hint = ref None;;
929 let prune_hint = ref [];;
931 let step _ = Condition.signal cond;;
932 let give_hint n = hint := Some n;;
933 let give_prune_hint hint =
934 prune_hint := hint :: !prune_hint
941 Condition.wait cond mutex;
946 let get_auto_status _ =
947 let status = !auto_status in
948 let and_list,elems,last =
951 | (m,s,_,don,gl,fail)::tl ->
954 (fun (id,d,_ as g) ->
955 match calculate_goal_ty g s m with
956 | Some (_,x) -> Some (id,x,d) | None -> None)
960 (* these are the S goalsin the or list *)
963 (fun (m,s,_,don,gl,fail) ->
965 (function S (g,k,c,_) -> Some (g,k,c) | _ -> None)
969 (* this function eats id from a list l::[id,x] returning x, l *)
970 let eat_tail_if_eq id l =
971 let rec aux (s, l) = function
973 | ((id1,_,_),k1,c)::tl when id = id1 ->
975 | None -> aux (Some c,l) tl
976 | Some _ -> assert false)
977 | ((id1,_,_),k1,c as e)::tl -> aux (s, e::l) tl
979 let c, l = aux (None, []) l in
982 let eat_in_parallel id l =
983 let rec aux (b,eaten, new_l as acc) l =
987 match eat_tail_if_eq id l with
988 | None, l -> aux (b@[false], eaten, new_l@[l]) tl
989 | Some t,l -> aux (b@[true],eaten@[t], new_l@[l]) tl
993 let rec eat_all rows l =
997 match List.rev elem with
998 | ((to_eat,depth,_),k,_)::next_lunch ->
999 let b, eaten, l = eat_in_parallel to_eat l in
1000 let eaten = HExtlib.list_uniq eaten in
1001 let eaten = List.rev eaten in
1002 let b = true (* List.hd (List.rev b) *) in
1003 let rows = rows @ [to_eat,k,b,depth,eaten] in
1005 | [] -> eat_all rows or_list
1007 eat_all [] (List.rev orlist)
1011 (function (S (_,_,(_,c),_)) -> Some c | _ -> None)
1014 (* let rows = List.filter (fun (_,l) -> l <> []) rows in *)
1015 and_list, rows, history
1017 !auto_context, elems, and_list, last
1020 (* Works if there is no dependency over proofs *)
1021 let is_a_green_cut goalty =
1022 CicUtil.is_meta_closed goalty
1024 let rec first_s = function
1025 | (D _)::tl -> first_s tl
1026 | (S (g,k,c,s))::tl -> Some ((g,k,c,s),tl)
1029 let list_union l1 l2 =
1030 (* TODO ottimizzare compare *)
1031 HExtlib.list_uniq (List.sort compare (l1 @ l1))
1033 let eat_head todo id fl orlist =
1034 let rec aux acc = function
1036 | (m, s, _, _, todo1, fl1)::tl as orlist ->
1037 let rec aux1 todo1 =
1038 match first_s todo1 with
1039 | None -> orlist, acc
1040 | Some (((gno,_,_),_,_,_), todo11) ->
1041 (* TODO confronto tra todo da ottimizzare *)
1042 if gno = id && todo11 = todo then
1043 aux (list_union fl1 acc) tl
1051 let close_proof p ty menv context =
1053 List.map fst (CicUtil.metas_of_term p @ CicUtil.metas_of_term ty)
1055 let menv = List.filter (fun (i,_,_) -> List.exists ((=)i) metas) menv in
1056 naif_closure p menv context
1058 (* XXX capire bene quando aggiungere alla cache *)
1059 let add_to_cache_and_del_from_orlist_if_green_cut
1060 g s m cache key todo orlist fl ctx size minsize
1062 let cache = cache_remove_underinspection cache key in
1063 (* prima per fare la irl usavamo il contesto vero e proprio e non quello
1065 match calculate_closed_goal_ty g s with
1066 | None -> assert false
1067 | Some (canonical_ctx , gty) ->
1068 let goalno,depth,sort = g in
1069 let irl = mk_irl canonical_ctx in
1070 let goal = Cic.Meta(goalno, irl) in
1071 let proof = CicMetaSubst.apply_subst s goal in
1072 let green_proof, closed_proof =
1073 let b = is_a_green_cut proof in
1075 b, (* close_proof proof gty m ctx *) proof
1079 debug_print (lazy ("TENTATIVE CACHE: " ^ CicPp.ppterm key));
1080 if is_a_green_cut key then
1081 (* if the initia goal was closed, we cut alternatives *)
1082 let _ = debug_print (lazy ("MANGIO: " ^ string_of_int goalno)) in
1083 let orlist, fl = eat_head todo goalno fl orlist in
1085 if size < minsize then
1086 (debug_print (lazy ("NO CACHE: 2 (size <= minsize)"));cache)
1088 (* if the proof is closed we cache it *)
1089 if green_proof then cache_add_success cache key proof
1090 else (* cache_add_success cache key closed_proof *)
1091 (debug_print (lazy ("NO CACHE: (no gree proof)"));cache)
1093 cache, orlist, fl, true
1096 debug_print (lazy ("TENTATIVE CACHE: " ^ CicPp.ppterm gty));
1097 if size < minsize then
1098 (debug_print (lazy ("NO CACHE: (size <= minsize)")); cache) else
1099 (* if the substituted goal and the proof are closed we cache it *)
1100 if is_a_green_cut gty then
1101 if green_proof then cache_add_success cache gty proof
1102 else (* cache_add_success cache gty closed_proof *)
1103 (debug_print (lazy ("NO CACHE: (no green proof (gty))"));cache)
1107 CicTypeChecker.type_of_aux' ~subst:s
1108 m ctx closed_proof CicUniv.oblivion_ugraph
1110 if is_a_green_cut ty then
1111 cache_add_success cache ty closed_proof
1114 | CicTypeChecker.TypeCheckerFailure _ ->*)
1115 (debug_print (lazy ("NO CACHE: (no green gty )"));cache)
1117 cache, orlist, fl, false
1119 let close_failures (fl : fail list) (cache : cache) =
1121 (fun cache ((gno,depth,_),gty) ->
1122 debug_print (lazy ("FAIL: INDUCED: " ^ string_of_int gno));
1123 cache_add_failure cache gty depth)
1126 let put_in_subst subst metasenv (goalno,_,_) canonical_ctx t ty =
1127 let entry = goalno, (canonical_ctx, t,ty) in
1128 assert_subst_are_disjoint subst [entry];
1129 let subst = entry :: subst in
1130 let metasenv = CicMetaSubst.apply_subst_metasenv subst metasenv in
1133 let mk_fake_proof metasenv subst (goalno,_,_) goalty context =
1134 None,metasenv,subst ,Cic.Meta(goalno,mk_irl context),goalty, []
1137 tables maxm cache depth fake_proof goalno goalty subst context
1140 let active,passive,bag = tables in
1141 let ppterm = ppterm context in
1142 let status = (fake_proof,goalno) in
1143 if flags.use_only_paramod then
1145 debug_print (lazy ("PARAMODULATION SU: " ^
1146 string_of_int goalno ^ " " ^ ppterm goalty ));
1147 let goal_steps, saturation_steps, timeout =
1148 max_int,max_int,flags.timeout
1151 Saturation.given_clause bag maxm status active passive
1152 goal_steps saturation_steps timeout
1154 | None, active, passive, maxmeta ->
1155 [], (active,passive,bag), cache, maxmeta, flags
1156 | Some(subst',(_,metasenv,_subst,proof,_, _),open_goals),active,
1158 assert_subst_are_disjoint subst subst';
1159 let subst = subst@subst' in
1161 order_new_goals metasenv subst open_goals ppterm
1164 List.map (fun (x,sort) -> x,depth-1,sort) open_goals
1167 [(!candidate_no,proof),metasenv,subst,open_goals],
1168 (active,passive,bag),
1169 cache, maxmeta, flags
1175 ("SUBSUMPTION SU: " ^ string_of_int goalno ^ " " ^ ppterm goalty));
1177 Saturation.all_subsumed bag maxm status active passive
1179 assert (maxmeta >= maxm);
1182 (fun (subst',(_,metasenv,_subst,proof,_, _),open_goals) ->
1183 assert_subst_are_disjoint subst subst';
1184 let subst = subst@subst' in
1186 order_new_goals metasenv subst open_goals ppterm
1189 List.map (fun (x,sort) -> x,depth-1,sort) open_goals
1192 (!candidate_no,proof),metasenv,subst,open_goals)
1195 res', (active,passive,bag), cache, maxmeta, flags
1200 goalty tables maxm subst fake_proof goalno depth context cand
1202 let ppterm = ppterm context in
1204 let subst,((_,metasenv,_,_,_,_), open_goals),maxmeta =
1205 (PrimitiveTactics.apply_with_subst ~subst ~maxmeta:maxm ~term:cand)
1208 debug_print (lazy (" OK: " ^ ppterm cand));
1209 let metasenv = CicRefine.pack_coercion_metasenv metasenv in
1210 let open_goals = order_new_goals metasenv subst open_goals ppterm in
1211 let open_goals = List.map (fun (x,sort) -> x,depth-1,sort) open_goals in
1213 Some ((!candidate_no,cand),metasenv,subst,open_goals), tables , maxmeta
1215 | ProofEngineTypes.Fail s -> None,tables, maxm
1216 | CicUnification.Uncertain s -> None,tables, maxm
1219 let sort_new_elems =
1220 List.sort (fun (_,_,_,l1) (_,_,_,l2) ->
1221 List.length (prop_only l1) - List.length (prop_only l2))
1224 let applicative_case
1225 tables maxm depth subst fake_proof goalno goalty metasenv context universe
1228 let candidates = get_candidates universe cache goalty in
1229 let tables, elems, maxm =
1231 (fun (tables,elems,maxm) cand ->
1233 try_candidate goalty
1234 tables maxm subst fake_proof goalno depth context cand
1236 | None, tables,maxm -> tables,elems, maxm
1237 | Some x, tables, maxm -> tables,x::elems, maxm)
1238 (tables,[],maxm) candidates
1240 let elems = sort_new_elems elems in
1241 elems, tables, cache, maxm
1244 let equational_and_applicative_case
1245 universe flags m s g gty tables cache maxm context
1247 let goalno, depth, sort = g in
1248 let fake_proof = mk_fake_proof m s g gty context in
1249 if is_equational_case gty flags then
1250 let elems,tables,cache,maxm1, flags =
1251 equational_case tables maxm cache
1252 depth fake_proof goalno gty s context flags
1255 let more_elems, tables, cache, maxm1 =
1256 if flags.use_only_paramod then
1257 [],tables, cache, maxm
1260 tables maxm depth s fake_proof goalno
1261 gty m context universe cache
1264 elems@more_elems, tables, cache, maxm, flags
1266 let elems, tables, cache, maxm =
1267 applicative_case tables maxm depth s fake_proof goalno
1268 gty m context universe cache
1270 elems, tables, cache, maxm, flags
1272 let rec condition_for_hint i = function
1274 | S (_,_,(j,_),_):: tl -> j <> i (* && condition_for_hint i tl *)
1275 | _::tl -> condition_for_hint i tl
1277 let remove_s_from_fl (id,_,_) (fl : fail list) =
1278 let rec aux = function
1280 | ((id1,_,_),_)::tl when id = id1 -> tl
1281 | hd::tl -> hd :: aux tl
1286 let prunable_for_size flags s m todo =
1287 let rec aux b = function
1288 | (S _)::tl -> aux b tl
1289 | (D (_,_,T))::tl -> aux b tl
1291 (match calculate_goal_ty g s m with
1293 | Some (canonical_ctx, gty) ->
1295 Utils.weight_of_term
1296 ~consider_metas:false ~count_metas_occurrences:true gty in
1297 let newb = b || gsize > flags.maxgoalsizefactor in
1304 let prunable ty todo =
1305 let rec aux b = function
1306 | (S(_,k,_,_))::tl -> aux (b || Equality.meta_convertibility k ty) tl
1307 | (D (_,_,T))::tl -> aux b tl
1315 let prunable menv subst ty todo =
1316 let rec aux = function
1317 | (S(_,k,_,_))::tl ->
1318 (match Equality.meta_convertibility_subst k ty menv with
1321 no_progress variant tl (* || aux tl*))
1322 | (D (_,_,T))::tl -> aux tl
1324 and no_progress variant = function
1325 | [] -> (*prerr_endline "++++++++++++++++++++++++ no_progress";*) true
1326 | D ((n,_,P) as g)::tl ->
1327 (match calculate_goal_ty g subst menv with
1328 | None -> no_progress variant tl
1330 (match calculate_goal_ty g variant menv with
1331 | None -> assert false
1334 no_progress variant tl
1336 | _::tl -> no_progress variant tl
1341 let condition_for_prune_hint prune (m, s, size, don, todo, fl) =
1343 HExtlib.filter_map (function S (_,_,(c,_),_) -> Some c | _ -> None) todo
1345 List.for_all (fun i -> List.for_all (fun j -> i<>j) prune) s
1347 let filter_prune_hint l =
1348 let prune = !prune_hint in
1349 prune_hint := []; (* possible race... *)
1350 if prune = [] then l
1351 else List.filter (condition_for_prune_hint prune) l
1353 let auto_main tables maxm context flags universe cache elems =
1354 auto_context := context;
1355 let rec aux tables maxm flags cache (elems : status) =
1356 (* pp_status context elems; *)
1357 (* DEBUGGING CODE: uncomment these two lines to stop execution at each iteration
1358 auto_status := elems;
1361 let elems = filter_prune_hint elems in
1363 | (m, s, size, don, todo, fl)::orlist when !hint <> None ->
1365 | Some i when condition_for_hint i todo ->
1366 aux tables maxm flags cache orlist
1369 aux tables maxm flags cache elems)
1371 (* complete failure *)
1372 Gaveup (tables, cache, maxm)
1373 | (m, s, _, _, [],_)::orlist ->
1374 (* complete success *)
1375 Proved (m, s, orlist, tables, cache, maxm)
1376 | (m, s, size, don, (D (_,_,T))::todo, fl)::orlist
1377 when not flags.AutoTypes.do_types ->
1378 (* skip since not Prop, don't even check if closed by side-effect *)
1379 aux tables maxm flags cache ((m, s, size, don, todo, fl)::orlist)
1380 | (m, s, size, don, (S(g, key, c,minsize) as op)::todo, fl)::orlist ->
1381 (* partial success, cache g and go on *)
1382 let cache, orlist, fl, sibling_pruned =
1383 add_to_cache_and_del_from_orlist_if_green_cut
1384 g s m cache key todo orlist fl context size minsize
1386 debug_print (lazy (AutoCache.cache_print context cache));
1387 let fl = remove_s_from_fl g fl in
1388 let don = if sibling_pruned then don else op::don in
1389 aux tables maxm flags cache ((m, s, size, don, todo, fl)::orlist)
1390 | (m, s, size, don, todo, fl)::orlist
1391 when List.length(prop_only (d_goals todo)) > flags.maxwidth ->
1392 debug_print (lazy ("FAIL: WIDTH"));
1393 (* too many goals in and generated by last th *)
1394 let cache = close_failures fl cache in
1395 aux tables maxm flags cache orlist
1396 | (m, s, size, don, todo, fl)::orlist when size > flags.maxsize ->
1398 (lazy ("FAIL: SIZE: "^string_of_int size ^
1399 " > " ^ string_of_int flags.maxsize ));
1400 (* we already have a too large proof term *)
1401 let cache = close_failures fl cache in
1402 aux tables maxm flags cache orlist
1403 | _ when Unix.gettimeofday () > flags.timeout ->
1405 debug_print (lazy ("FAIL: TIMEOUT"));
1406 Gaveup (tables, cache, maxm)
1407 | (m, s, size, don, (D (gno,depth,_ as g))::todo, fl)::orlist as status ->
1409 match calculate_goal_ty g s m with
1411 (* closed by side effect *)
1412 debug_print (lazy ("SUCCESS: SIDE EFFECT: " ^ string_of_int gno));
1413 aux tables maxm flags cache ((m,s,size,don,todo, fl)::orlist)
1414 | Some (canonical_ctx, gty) ->
1416 Utils.weight_of_term ~consider_metas:false ~count_metas_occurrences:true gty
1418 if gsize > flags.maxgoalsizefactor then
1419 (debug_print (lazy ("FAIL: SIZE: goal: "^string_of_int gsize));
1420 aux tables maxm flags cache orlist)
1421 else if prunable_for_size flags s m todo then
1422 (debug_print (lazy ("POTO at depth: "^(string_of_int depth)));
1423 aux tables maxm flags cache orlist)
1425 (* still to be proved *)
1426 (debug_print (lazy ("EXAMINE: "^CicPp.ppterm gty));
1427 match cache_examine cache gty with
1428 | Failed_in d when d >= depth ->
1430 debug_print (lazy ("FAIL: DEPTH (cache): "^string_of_int gno));
1431 let cache = close_failures fl cache in
1432 aux tables maxm flags cache orlist
1433 | UnderInspection ->
1435 debug_print (lazy ("FAIL: LOOP: " ^ string_of_int gno));
1436 let cache = close_failures fl cache in
1437 aux tables maxm flags cache orlist
1439 debug_print (lazy ("SUCCESS: CACHE HIT: " ^ string_of_int gno));
1440 let s, m = put_in_subst s m g canonical_ctx t gty in
1441 aux tables maxm flags cache ((m, s, size, don,todo, fl)::orlist)
1443 | Failed_in _ when depth > 0 ->
1444 ( (* more depth or is the first time we see the goal *)
1445 if prunable m s gty todo then
1447 "FAIL: LOOP: one father is equal"));
1448 aux tables maxm flags cache orlist)
1450 let cache = cache_add_underinspection cache gty depth in
1451 auto_status := status;
1454 (lazy ("INSPECTING: " ^
1455 string_of_int gno ^ "("^ string_of_int size ^ "): "^
1457 (* elems are possible computations for proving gty *)
1458 let elems, tables, cache, maxm, flags =
1459 equational_and_applicative_case
1460 universe flags m s g gty tables cache maxm context
1463 (* this goal has failed *)
1464 let cache = close_failures ((g,gty)::fl) cache in
1465 aux tables maxm flags cache orlist
1467 (* elems = (cand,m,s,gl) *)
1468 let size_gl l = List.length
1469 (List.filter (function (_,_,P) -> true | _ -> false) l)
1472 let inj_gl gl = List.map (fun g -> D g) gl in
1473 let rec map = function
1474 | [] -> assert false
1475 | (cand,m,s,gl)::[] ->
1476 (* in the last one we add the failure *)
1478 inj_gl gl @ (S(g,gty,cand,size+1))::todo
1480 (* we are the last in OR, we fail on g and
1481 * also on all failures implied by g *)
1482 (m,s, size + size_gl gl, don, todo, (g,gty)::fl)
1484 | (cand,m,s,gl)::tl ->
1485 (* we add the S step after gl and before todo *)
1487 inj_gl gl @ (S(g,gty,cand,size+1))::todo
1489 (* since we are not the last in OR, we do not
1491 (m,s, size + size_gl gl, don, todo, []) :: map tl
1495 aux tables maxm flags cache elems)
1498 debug_print (lazy ("FAIL: DEPTH: " ^ string_of_int gno));
1499 let cache = close_failures fl cache in
1500 aux tables maxm flags cache orlist)
1502 (aux tables maxm flags cache elems : auto_result)
1507 auto_all_solutions maxm tables universe cache context metasenv gl flags
1509 let goals = order_new_goals metasenv [] gl CicPp.ppterm in
1512 (fun (x,s) -> D (x,flags.maxdepth,s)) goals
1514 let elems = [metasenv,[],1,[],goals,[]] in
1515 let rec aux tables maxm solutions cache elems flags =
1516 match auto_main tables maxm context flags universe cache elems with
1517 | Gaveup (tables,cache,maxm) ->
1518 solutions,cache,maxm
1519 | Proved (metasenv,subst,others,tables,cache,maxm) ->
1520 if Unix.gettimeofday () > flags.timeout then
1521 ((subst,metasenv)::solutions), cache, maxm
1523 aux tables maxm ((subst,metasenv)::solutions) cache others flags
1525 let rc = aux tables maxm [] cache elems flags in
1527 | [],cache,maxm -> [],cache,maxm
1528 | solutions,cache,maxm ->
1531 (fun (subst,newmetasenv) ->
1533 ProofEngineHelpers.compare_metasenvs ~oldmetasenv:metasenv ~newmetasenv
1535 if opened = [] then Some subst else None)
1538 solutions,cache,maxm
1541 (* }}} ****************** AUTO ***************)
1543 let auto flags metasenv tables universe cache context metasenv gl =
1544 let initial_time = Unix.gettimeofday() in
1545 let goals = order_new_goals metasenv [] gl CicPp.ppterm in
1546 let goals = List.map (fun (x,s) -> D(x,flags.maxdepth,s)) goals in
1547 let elems = [metasenv,[],1,[],goals,[]] in
1548 match auto_main tables 0 context flags universe cache elems with
1549 | Proved (metasenv,subst,_, tables,cache,_) ->
1551 ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time)));
1552 Some (subst,metasenv), cache
1553 | Gaveup (tables,cache,maxm) ->
1555 ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time)));
1559 let applyS_tac ~dbd ~term ~params ~universe =
1560 ProofEngineTypes.mk_tactic
1564 apply_smart ~dbd ~term ~subst:[] ~params ~universe status
1568 | CicUnification.UnificationFailure msg
1569 | CicTypeChecker.TypeCheckerFailure msg ->
1570 raise (ProofEngineTypes.Fail msg))
1572 let auto_tac ~(dbd:HSql.dbd) ~params:(univ,params) ~universe (proof, goal) =
1573 let _,metasenv,_subst,_,_, _ = proof in
1574 let _,context,goalty = CicUtil.lookup_meta goal metasenv in
1575 let universe = universe_of_params metasenv context universe univ in
1576 let flags = flags_of_params params () in
1577 let use_library = flags.use_library in
1578 let tables,cache,newmeta =
1579 init_cache_and_tables ~dbd use_library flags.use_only_paramod true
1580 false universe (proof, goal) in
1581 let tables,cache,newmeta =
1582 if flags.close_more then
1584 tables newmeta context (proof, goal)
1585 auto_all_solutions universe cache
1586 else tables,cache,newmeta in
1587 let initial_time = Unix.gettimeofday() in
1588 let (_,oldmetasenv,_subst,_,_, _) = proof in
1591 metasenv,[],1,[],[D (goal,flags.maxdepth,P)],[]
1593 match auto_main tables newmeta context flags universe cache [elem] with
1594 | Proved (metasenv,subst,_, tables,cache,_) ->
1596 ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time));*)
1597 let proof,metasenv =
1598 ProofEngineHelpers.subst_meta_and_metasenv_in_proof
1599 proof goal subst metasenv
1602 ProofEngineHelpers.compare_metasenvs ~oldmetasenv
1603 ~newmetasenv:metasenv
1606 | Gaveup (tables,cache,maxm) ->
1609 string_of_float(Unix.gettimeofday()-.initial_time)));
1610 raise (ProofEngineTypes.Fail (lazy "Auto gave up"))
1613 let auto_tac ~dbd ~params ~universe =
1614 ProofEngineTypes.mk_tactic (auto_tac ~params ~dbd ~universe);;
1616 let eq_of_goal = function
1617 | Cic.Appl [Cic.MutInd(uri,0,_);_;_;_] when LibraryObjects.is_eq_URI uri ->
1619 | _ -> raise (ProofEngineTypes.Fail (lazy ("The goal is not an equality ")))
1622 (* performs steps of rewrite with the universe, obtaining if possible
1624 let solve_rewrite_tac ~universe ~params:(univ,params) (proof,goal as status)=
1625 let _,metasenv,_subst,_,_,_ = proof in
1626 let _,context,ty = CicUtil.lookup_meta goal metasenv in
1627 let steps = int_of_string (string params "steps" "1") in
1628 let universe = universe_of_params metasenv context universe univ in
1629 let eq_uri = eq_of_goal ty in
1630 let (active,passive,bag), cache, maxm =
1631 (* we take the whole universe (no signature filtering) *)
1632 init_cache_and_tables false true false true universe (proof,goal)
1634 let initgoal = [], metasenv, ty in
1636 let equalities = (Saturation.list_of_passive passive) in
1637 (* we demodulate using both actives passives *)
1638 List.fold_left (fun tbl eq -> Indexing.index tbl eq) (snd active) equalities
1640 let env = metasenv,context,CicUniv.oblivion_ugraph in
1641 match Indexing.solve_demodulating bag env table initgoal steps with
1642 | Some (proof, metasenv, newty) ->
1645 | Cic.Appl[Cic.MutInd _;eq_ty;left;_] ->
1646 Equality.Exact (Equality.refl_proof eq_uri eq_ty left)
1650 Equality.build_goal_proof
1651 bag eq_uri proof refl newty [] context metasenv
1653 ProofEngineTypes.apply_tactic
1654 (PrimitiveTactics.apply_tac ~term:proofterm) status
1657 (ProofEngineTypes.Fail (lazy
1658 ("Unable to solve with " ^ string_of_int steps ^ " demodulations")))
1660 let solve_rewrite_tac ~params ~universe () =
1661 ProofEngineTypes.mk_tactic (solve_rewrite_tac ~universe ~params)
1665 let demodulate_tac ~dbd ~universe ~params:(univ, params) (proof,goal)=
1666 let curi,metasenv,_subst,pbo,pty, attrs = proof in
1667 let metano,context,ty = CicUtil.lookup_meta goal metasenv in
1668 let universe = universe_of_params metasenv context universe univ in
1669 let irl = CicMkImplicit.identity_relocation_list_for_metavariable context in
1670 let initgoal = [], metasenv, ty in
1671 let eq_uri = eq_of_goal ty in
1672 let (active,passive,bag), cache, maxm =
1673 init_cache_and_tables
1674 ~dbd false true true false universe (proof,goal)
1676 let equalities = (Saturation.list_of_passive passive) in
1677 (* we demodulate using both actives passives *)
1680 (fun tbl eq -> Indexing.index tbl eq)
1681 (snd active) equalities
1683 let changed,(newproof,newmetasenv, newty) =
1684 Indexing.demodulation_goal bag
1685 (metasenv,context,CicUniv.oblivion_ugraph) table initgoal
1689 let opengoal = Equality.Exact (Cic.Meta(maxm,irl)) in
1691 Equality.build_goal_proof bag
1692 eq_uri newproof opengoal ty [] context metasenv
1694 let extended_metasenv = (maxm,context,newty)::metasenv in
1695 let extended_status =
1696 (curi,extended_metasenv,_subst,pbo,pty, attrs),goal in
1697 let (status,newgoals) =
1698 ProofEngineTypes.apply_tactic
1699 (PrimitiveTactics.apply_tac ~term:proofterm)
1701 (status,maxm::newgoals)
1703 else (* if newty = ty then *)
1704 raise (ProofEngineTypes.Fail (lazy "no progress"))
1705 (*else ProofEngineTypes.apply_tactic
1706 (ReductionTactics.simpl_tac
1707 ~pattern:(ProofEngineTypes.conclusion_pattern None)) initialstatus*)
1710 let demodulate_tac ~dbd ~params ~universe =
1711 ProofEngineTypes.mk_tactic (demodulate_tac ~dbd ~params ~universe);;
1713 let pp_proofterm = Equality.pp_proofterm;;
1715 let revision = "$Revision$";;
1716 let size_and_depth context metasenv t = 100, 100