1 (* Copyright (C) 2005, 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/.
26 let _profiler = <:profiler<_profiler>>;;
30 (* set to false to disable paramodulation inside auto_tac *)
32 let connect_to_auto = true;;
35 (* profiling statistics... *)
36 let infer_time = ref 0.;;
37 let forward_simpl_time = ref 0.;;
38 let forward_simpl_new_time = ref 0.;;
39 let backward_simpl_time = ref 0.;;
40 let passive_maintainance_time = ref 0.;;
42 (* limited-resource-strategy related globals *)
43 let processed_clauses = ref 0;; (* number of equalities selected so far... *)
44 let time_limit = ref 0.;; (* in seconds, settable by the user... *)
45 let start_time = ref 0.;; (* time at which the execution started *)
46 let elapsed_time = ref 0.;;
47 (* let maximal_weight = ref None;; *)
48 let maximal_retained_equality = ref None;;
50 (* equality-selection related globals *)
51 let use_fullred = ref true;;
52 let weight_age_ratio = ref 6 (* 5 *);; (* settable by the user *)
53 let weight_age_counter = ref !weight_age_ratio ;;
54 let symbols_ratio = ref 0 (* 3 *);;
55 let symbols_counter = ref 0;;
57 (* non-recursive Knuth-Bendix term ordering by default *)
58 (* Utils.compare_terms := Utils.rpo;; *)
59 (* Utils.compare_terms := Utils.nonrec_kbo;; *)
60 (* Utils.compare_terms := Utils.ao;; *)
63 let derived_clauses = ref 0;;
64 let kept_clauses = ref 0;;
66 (* index of the greatest Cic.Meta created - TODO: find a better way! *)
69 (* varbiables controlling the search-space *)
70 let maxdepth = ref 3;;
71 let maxwidth = ref 3;;
74 Equality.goal_proof * Equality.proof * int * Subst.substitution * Cic.metasenv
76 | ParamodulationFailure of string
77 | ParamodulationSuccess of new_proof
80 (* type goal = Equality.goal_proof * Cic.metasenv * Cic.term;; *)
82 type theorem = Cic.term * Cic.term * Cic.metasenv;;
84 let symbols_of_equality equality =
85 let (_, _, (_, left, right, _), _,_) = Equality.open_equality equality in
86 let m1 = Utils.symbols_of_term left in
91 let c = Utils.TermMap.find k res in
92 Utils.TermMap.add k (c+v) res
94 Utils.TermMap.add k v res)
95 (Utils.symbols_of_term right) m1
101 module OrderedEquality = struct
102 type t = Equality.equality
104 let compare eq1 eq2 =
105 match Equality.meta_convertibility_eq eq1 eq2 with
108 let w1, _, (ty,left, right, _), m1,_ = Equality.open_equality eq1 in
109 let w2, _, (ty',left', right', _), m2,_ = Equality.open_equality eq2 in
110 match Pervasives.compare w1 w2 with
112 let res = (List.length m1) - (List.length m2) in
113 if res <> 0 then res else
114 Equality.compare eq1 eq2
118 module EqualitySet = Set.Make(OrderedEquality);;
120 exception Empty_list;;
122 let passive_is_empty = function
127 let no_more_passive_goals = function
132 let size_of_passive ((passive_list, ps), _) = List.length passive_list
133 (* EqualitySet.cardinal ps *)
137 let size_of_active (active_list, _) = List.length active_list
140 let age_factor = 0.01;;
143 selects one equality from passive. The selection strategy is a combination
144 of weight, age and goal-similarity
147 let rec select env (goals,_) passive =
148 processed_clauses := !processed_clauses + 1;
150 match (List.rev goals) with goal::_ -> goal | _ -> assert false
152 let (pos_list, pos_set), passive_table = passive in
153 let remove eq l = List.filter (fun e -> Equality.compare e eq <> 0) l in
154 if !weight_age_ratio > 0 then
155 weight_age_counter := !weight_age_counter - 1;
156 match !weight_age_counter with
158 weight_age_counter := !weight_age_ratio;
159 let rec skip_giant pos_list pos_set passive_table =
161 | (hd:EqualitySet.elt)::tl ->
162 let w,_,_,_,_ = Equality.open_equality hd in
164 Indexing.remove_index passive_table hd
166 let pos_set = EqualitySet.remove hd pos_set in
168 hd, ((tl, pos_set), passive_table)
170 (prerr_endline ("\n\n\nGIANT SKIPPED: "^string_of_int w^"\n\n\n");
171 skip_giant tl pos_set passive_table)
174 skip_giant pos_list pos_set passive_table)
175 | _ when (!symbols_counter > 0) ->
176 (symbols_counter := !symbols_counter - 1;
177 let cardinality map =
178 Utils.TermMap.fold (fun k v res -> res + v) map 0
181 let _, _, term = goal in
182 Utils.symbols_of_term term
184 let card = cardinality symbols in
185 let foldfun k v (r1, r2) =
186 if Utils.TermMap.mem k symbols then
187 let c = Utils.TermMap.find k symbols in
188 let c1 = abs (c - v) in
194 let f equality (i, e) =
196 Utils.TermMap.fold foldfun (symbols_of_equality equality) (0, 0)
198 let c = others + (abs (common - card)) in
199 if c < i then (c, equality)
202 let e1 = EqualitySet.min_elt pos_set in
205 Utils.TermMap.fold foldfun (symbols_of_equality e1) (0, 0)
207 (others + (abs (common - card))), e1
209 let _, current = EqualitySet.fold f pos_set initial in
211 Indexing.remove_index passive_table current
214 ((remove current pos_list, EqualitySet.remove current pos_set),
217 symbols_counter := !symbols_ratio;
219 let w1,_,_,_,_ = Equality.open_equality e1 in
220 let w2,_,_,_,_ = Equality.open_equality e2 in
221 if w1 < w2 then e1 else e2
223 let rec my_min_elt min = function
225 | hd::tl -> my_min_elt (my_min hd min) tl
227 (* let current = EqualitySet.min_elt pos_set in *)
228 let current = my_min_elt (List.hd pos_list) (List.tl pos_list) in
230 Indexing.remove_index passive_table current
233 ((remove current pos_list, EqualitySet.remove current pos_set),
237 let filter_dependent passive id =
238 prerr_endline ("+++++++++++++++passives "^
239 ( string_of_int (size_of_passive passive)));
240 let (pos_list, pos_set), passive_table = passive in
243 (fun eq ((list,set),table) ->
244 if Equality.depend eq id then
245 (let _,_,_,_,id_eq = Equality.open_equality eq in
247 prerr_endline ("\n\n--------filtering "^(string_of_int id_eq));
249 EqualitySet.remove eq set),
250 Indexing.remove_index table eq))
252 ((eq::list, set),table))
253 pos_list (([],pos_set),passive_table) in
254 prerr_endline ("+++++++++++++++passives "^
255 ( string_of_int (size_of_passive passive)));
260 (* initializes the passive set of equalities *)
261 let make_passive pos =
262 let set_of equalities =
263 List.fold_left (fun s e -> EqualitySet.add e s) EqualitySet.empty equalities
266 List.fold_left (fun tbl e -> Indexing.index tbl e) Indexing.empty pos
278 (* adds to passive a list of equalities new_pos *)
279 let add_to_passive passive new_pos preferred =
280 let (pos_list, pos_set), table = passive in
281 let ok set equality = not (EqualitySet.mem equality set) in
282 let pos = List.filter (ok pos_set) new_pos in
284 List.fold_left (fun tbl e -> Indexing.index tbl e) table pos
286 let add set equalities =
287 List.fold_left (fun s e -> EqualitySet.add e s) set equalities
289 let pos_head, pos_tail =
291 (fun e -> List.exists (fun x -> Equality.compare x e = 0) preferred)
294 (pos_head @ pos_list @ pos_tail, add pos_set pos),
299 (* removes from passive equalities that are estimated impossible to activate
300 within the current time limit *)
301 let prune_passive howmany (active, _) passive =
302 let (pl, ps), tbl = passive in
303 let howmany = float_of_int howmany
304 and ratio = float_of_int !weight_age_ratio in
307 int_of_float (if t -. v < 0.5 then t else v)
309 let in_weight = round (howmany *. ratio /. (ratio +. 1.))
310 and in_age = round (howmany /. (ratio +. 1.)) in
312 (lazy (Printf.sprintf "in_weight: %d, in_age: %d\n" in_weight in_age));
313 let counter = ref !symbols_ratio in
318 counter := !counter - 1;
319 if !counter = 0 then counter := !symbols_ratio in
320 let e = EqualitySet.min_elt ps in
321 let ps' = pickw (w-1) (EqualitySet.remove e ps) in
322 EqualitySet.add e ps'
324 let e = EqualitySet.min_elt ps in
325 let ps' = pickw (w-1) (EqualitySet.remove e ps) in
326 EqualitySet.add e ps'
330 let ps = pickw in_weight ps in
331 let rec picka w s l =
335 | hd::tl when not (EqualitySet.mem hd s) ->
336 let w, s, l = picka (w-1) s tl in
337 w, EqualitySet.add hd s, hd::l
339 let w, s, l = picka w s tl in
344 let _, ps, pl = picka in_age ps pl in
345 if not (EqualitySet.is_empty ps) then
346 maximal_retained_equality := Some (EqualitySet.max_elt ps);
349 (fun e tbl -> Indexing.index tbl e) ps Indexing.empty
355 (** inference of new equalities between current and some in active *)
356 let infer eq_uri env current (active_list, active_table) =
358 if Utils.debug_metas then
359 (ignore(Indexing.check_target c current "infer1");
360 ignore(List.map (function current -> Indexing.check_target c current "infer2") active_list));
362 let maxm, copy_of_current = Equality.fix_metas !maxmeta current in
364 let active_table = Indexing.index active_table copy_of_current in
365 let _ = <:start<current contro active>> in
367 Indexing.superposition_right eq_uri !maxmeta env active_table current
369 let _ = <:stop<current contro active>> in
370 if Utils.debug_metas then
373 Indexing.check_target c current "sup0") res);
375 let rec infer_positive table = function
379 Indexing.superposition_right
380 ~subterms_only:true eq_uri !maxmeta env table equality
383 if Utils.debug_metas then
387 Indexing.check_target c current "sup2") res);
388 let pos = infer_positive table tl in
392 let maxm, copy_of_current = Equality.fix_metas !maxmeta current in
395 let curr_table = Indexing.index Indexing.empty current in
396 let _ = <:start<active contro current>> in
397 let pos = infer_positive curr_table ((*copy_of_current::*)active_list) in
398 let _ = <:stop<active contro current>> in
399 if Utils.debug_metas then
402 Indexing.check_target c current "sup3") pos);
405 derived_clauses := !derived_clauses + (List.length new_pos);
406 match !maximal_retained_equality with
409 ignore(assert false);
410 (* if we have a maximal_retained_equality, we can discard all equalities
411 "greater" than it, as they will never be reached... An equality is
412 greater than maximal_retained_equality if it is bigger
413 wrt. OrderedEquality.compare and it is less similar than
414 maximal_retained_equality to the current goal *)
415 List.filter (fun e -> OrderedEquality.compare e eq <= 0) new_pos
418 let check_for_deep_subsumption env active_table eq =
419 let _,_,(eq_ty, left, right, order),metas,id = Equality.open_equality eq in
420 let check_subsumed deep l r =
422 Equality.mk_tmp_equality(0,(eq_ty,l,r,Utils.Incomparable),metas)in
423 match Indexing.subsumption env active_table eqtmp with
427 let rec aux b (ok_so_far, subsumption_used) t1 t2 =
429 | t1, t2 when not ok_so_far -> ok_so_far, subsumption_used
430 | t1, t2 when subsumption_used -> t1 = t2, subsumption_used
431 | Cic.Appl (h1::l),Cic.Appl (h2::l') ->
432 let rc = check_subsumed b t1 t2 in
438 (fun (ok_so_far, subsumption_used) t t' ->
439 aux true (ok_so_far, subsumption_used) t t')
440 (ok_so_far, subsumption_used) l l'
441 with Invalid_argument _ -> false,subsumption_used)
443 false, subsumption_used
444 | _ -> false, subsumption_used
446 fst (aux false (true,false) left right)
449 (* buttare via sign *)
451 (** simplifies current using active and passive *)
453 eq_uri env (sign,current) ?passive (active_list, active_table)
455 let _, context, _ = env in
459 | Some ((_, _), pt) -> Some pt
461 let demodulate table current =
462 let newmeta, newcurrent =
463 Indexing.demodulation_equality eq_uri !maxmeta env table sign current in
465 if Equality.is_identity env newcurrent then
470 let rec demod current =
471 if Utils.debug_metas then
472 ignore (Indexing.check_target context current "demod0");
473 let res = demodulate active_table current in
474 if Utils.debug_metas then
475 ignore ((function None -> () | Some x ->
476 ignore (Indexing.check_target context x "demod1");()) res);
480 match passive_table with
482 | Some passive_table ->
483 match demodulate passive_table newcurrent with
485 | Some newnewcurrent ->
486 if Equality.compare newcurrent newnewcurrent <> 0 then
488 else Some newnewcurrent
490 let res = demod current in
494 if Indexing.in_index active_table c then
497 match passive_table with
499 if check_for_deep_subsumption env active_table c then
504 if Indexing.subsumption env active_table c = None then
509 | Some passive_table ->
510 if Indexing.in_index passive_table c then None
512 if check_for_deep_subsumption env active_table c then
515 (* if Indexing.subsumption env active_table c = None then*)
516 (match Indexing.subsumption env passive_table c with
520 (*prerr_endline "\n\nPESCO DALLE PASSIVE LA PIU' GENERALE\n\n";
528 (** simplifies new using active and passive *)
529 let forward_simplify_new eq_uri env new_pos ?passive active =
530 if Utils.debug_metas then
534 (fun current -> Indexing.check_target c current "forward new pos")
537 let active_list, active_table = active in
541 | Some ((_, _), pt) -> Some pt
543 let demodulate sign table target =
544 let newmeta, newtarget =
545 Indexing.demodulation_equality eq_uri !maxmeta env table sign target
550 (* we could also demodulate using passive. Currently we don't *)
552 List.map (demodulate Utils.Positive active_table) new_pos
557 if not (Equality.is_identity env e) then
560 EqualitySet.empty new_pos
562 let new_pos = EqualitySet.elements new_pos_set in
565 match passive_table with
567 (fun e -> (Indexing.subsumption env active_table e = None))
568 | Some passive_table ->
569 (fun e -> ((Indexing.subsumption env active_table e = None) &&
570 (Indexing.subsumption env passive_table e = None)))
573 match passive_table with
575 (fun e -> not (Indexing.in_index active_table e))
576 | Some passive_table ->
578 not ((Indexing.in_index active_table e) ||
579 (Indexing.in_index passive_table e)))
581 List.filter subs (List.filter is_duplicate new_pos)
585 (** simplifies a goal with equalities in active and passive *)
586 let rec simplify_goal env goal ?passive (active_list, active_table) =
590 | Some ((_, _), pt) -> Some pt
592 let demodulate table goal = Indexing.demodulation_goal env table goal in
594 match passive_table with
595 | None -> demodulate active_table goal
596 | Some passive_table ->
597 let changed, goal = demodulate active_table goal in
598 (* let changed', goal = demodulate passive_table goal in*)
599 (changed (*|| changed'*)), goal
605 snd (simplify_goal env goal ?passive (active_list, active_table))
609 let simplify_goals env goals ?passive active =
610 let a_goals, p_goals = goals in
613 (fun g -> snd (simplify_goal env g ?passive active))
618 (fun g -> snd (simplify_goal env g ?passive active))
625 (** simplifies active usign new *)
626 let backward_simplify_active eq_uri env new_pos new_table min_weight active =
627 let active_list, active_table = active in
628 let active_list, newa, pruned =
630 (fun equality (res, newn,pruned) ->
631 let ew, _, _, _,id = Equality.open_equality equality in
632 if ew < min_weight then
633 equality::res, newn,pruned
637 eq_uri env (Utils.Positive, equality) (new_pos, new_table)
639 | None -> res, newn, id::pruned
641 if Equality.compare equality e = 0 then
644 res, e::newn, pruned)
645 active_list ([], [],[])
648 List.exists (Equality.meta_convertibility_eq eq1) where
651 let _, _, _, _,id = Equality.open_equality eq in id
653 let ((active1,pruned),tbl), newa =
655 (fun eq ((res,pruned), tbl) ->
656 if List.mem eq res then
657 (res, (id_of_eq eq)::pruned),tbl
658 else if (Equality.is_identity env eq) || (find eq res) then (
659 (res, (id_of_eq eq)::pruned),tbl
662 (eq::res,pruned), Indexing.index tbl eq)
663 active_list (([],pruned), Indexing.empty),
666 if (Equality.is_identity env eq) then p
671 | [] -> (active1,tbl), None, pruned
672 | _ -> (active1,tbl), Some newa, pruned
676 (** simplifies passive using new *)
677 let backward_simplify_passive eq_uri env new_pos new_table min_weight passive =
678 let (pl, ps), passive_table = passive in
679 let f sign equality (resl, ress, newn) =
680 let ew, _, _, _ , _ = Equality.open_equality equality in
681 if ew < min_weight then
682 equality::resl, ress, newn
685 forward_simplify eq_uri env (sign, equality) (new_pos, new_table)
687 | None -> resl, EqualitySet.remove equality ress, newn
690 equality::resl, ress, newn
692 let ress = EqualitySet.remove equality ress in
695 let pl, ps, newp = List.fold_right (f Utils.Positive) pl ([], ps, []) in
698 (fun tbl e -> Indexing.index tbl e) Indexing.empty pl
701 | [] -> ((pl, ps), passive_table), None
702 | _ -> ((pl, ps), passive_table), Some (newp)
705 let build_table equations =
708 let ew, _, _, _ , _ = Equality.open_equality e in
709 e::l, Indexing.index t e, min ew w)
710 ([], Indexing.empty, 1000000) equations
714 let backward_simplify eq_uri env new' ?passive active =
715 let new_pos, new_table, min_weight = build_table new' in
719 let ew, _, _, _ , _ = Equality.open_equality e in
720 e::l, Indexing.index t e, min ew w)
721 ([], Indexing.empty, 1000000) new'
724 let active, newa, pruned =
725 backward_simplify_active eq_uri env new_pos new_table min_weight active
729 active, (make_passive []), newa, None, pruned
731 active, passive, newa, None, pruned
734 backward_simplify_passive env new_pos new_table min_weight passive in
735 active, passive, newa, newp *)
738 let close eq_uri env new' given =
739 let new_pos, new_table, min_weight =
742 let ew, _, _, _ , _ = Equality.open_equality e in
743 e::l, Indexing.index t e, min ew w)
744 ([], Indexing.empty, 1000000) (snd new')
748 let pos = infer eq_uri env c (new_pos,new_table) in
753 let is_commutative_law eq =
754 let w, proof, (eq_ty, left, right, order), metas , _ =
755 Equality.open_equality eq
757 match left,right with
758 Cic.Appl[f1;Cic.Meta _ as a1;Cic.Meta _ as b1],
759 Cic.Appl[f2;Cic.Meta _ as a2;Cic.Meta _ as b2] ->
760 f1 = f2 && a1 = b2 && a2 = b1
764 let prova eq_uri env new' active =
765 let given = List.filter is_commutative_law (fst active) in
769 (Printf.sprintf "symmetric:\n%s\n"
772 (fun e -> Equality.string_of_equality ~env e)
774 close eq_uri env new' given
777 (* returns an estimation of how many equalities in passive can be activated
778 within the current time limit *)
779 let get_selection_estimate () =
780 elapsed_time := (Unix.gettimeofday ()) -. !start_time;
781 (* !processed_clauses * (int_of_float (!time_limit /. !elapsed_time)) *)
783 ceil ((float_of_int !processed_clauses) *.
784 ((!time_limit (* *. 2. *)) /. !elapsed_time -. 1.)))
788 (** initializes the set of goals *)
789 let make_goals goal =
791 and passive = [0, [goal]] in
795 let make_goal_set goal =
799 (** initializes the set of theorems *)
800 let make_theorems theorems =
805 let activate_goal (active, passive) =
808 | goal_conj::tl -> true, (goal_conj::active, tl)
809 | [] -> false, (active, passive)
811 true, (active,passive)
815 let activate_theorem (active, passive) =
817 | theorem::tl -> true, (theorem::active, tl)
818 | [] -> false, (active, passive)
823 let simplify_theorems env theorems ?passive (active_list, active_table) =
824 let pl, passive_table =
827 | Some ((pn, _), (pp, _), pt) ->
828 let pn = List.map (fun e -> (Utils.Negative, e)) pn
829 and pp = List.map (fun e -> (Utils.Positive, e)) pp in
832 let a_theorems, p_theorems = theorems in
833 let demodulate table theorem =
834 let newmeta, newthm =
835 Indexing.demodulation_theorem !maxmeta env table theorem in
837 theorem != newthm, newthm
839 let foldfun table (a, p) theorem =
840 let changed, theorem = demodulate table theorem in
841 if changed then (a, theorem::p) else (theorem::a, p)
843 let mapfun table theorem = snd (demodulate table theorem) in
844 match passive_table with
846 let p_theorems = List.map (mapfun active_table) p_theorems in
847 List.fold_left (foldfun active_table) ([], p_theorems) a_theorems
848 | Some passive_table ->
849 let p_theorems = List.map (mapfun active_table) p_theorems in
850 let p_theorems, a_theorems =
851 List.fold_left (foldfun active_table) ([], p_theorems) a_theorems in
852 let p_theorems = List.map (mapfun passive_table) p_theorems in
853 List.fold_left (foldfun passive_table) ([], p_theorems) a_theorems
857 let rec simpl eq_uri env e others others_simpl =
858 let active = others @ others_simpl in
861 (fun t e -> Indexing.index t e)
862 Indexing.empty active
864 let res = forward_simplify eq_uri env (Utils.Positive,e) (active, tbl) in
868 | None -> simpl eq_uri env hd tl others_simpl
869 | Some e -> simpl eq_uri env hd tl (e::others_simpl)
873 | None -> others_simpl
874 | Some e -> e::others_simpl
878 let simplify_equalities eq_uri env equalities =
881 (Printf.sprintf "equalities:\n%s\n"
883 (List.map Equality.string_of_equality equalities))));
884 Utils.debug_print (lazy "SIMPLYFYING EQUALITIES...");
885 match equalities with
889 List.rev (simpl eq_uri env hd tl [])
893 (Printf.sprintf "equalities AFTER:\n%s\n"
895 (List.map Equality.string_of_equality res))));
899 let print_goals goals =
906 (* (string_of_proof p) ^ ", " ^ *) (CicPp.ppterm t)) gl
908 Printf.sprintf "%d: %s" d (String.concat "; " gl')) goals))
911 let pp_goal_set msg goals names =
912 let active_goals, passive_goals = goals in
913 prerr_endline ("////" ^ msg);
914 prerr_endline ("ACTIVE G: " ^
915 (String.concat "\n " (List.map (fun (_,_,g) -> CicPp.pp g names)
917 prerr_endline ("PASSIVE G: " ^
918 (String.concat "\n " (List.map (fun (_,_,g) -> CicPp.pp g names)
922 let check_if_goal_is_subsumed ((_,ctx,_) as env) table (goalproof,menv,ty) =
923 let names = Utils.names_of_context ctx in
925 | Cic.Appl[Cic.MutInd(uri,_,_);eq_ty;left;right]
926 when LibraryObjects.is_eq_URI uri ->
929 (0,Equality.Exact (Cic.Implicit None),(eq_ty,left,right,Utils.Eq),menv)
931 (* match Indexing.subsumption env table goal_equation with*)
932 match Indexing.unification env table goal_equation with
933 | Some (subst, equality, swapped ) ->
935 ("GOAL SUBSUMED IS: " ^ Equality.string_of_equality goal_equation ~env);
937 ("GOAL IS SUBSUMED BY: " ^ Equality.string_of_equality equality ~env);
938 prerr_endline ("SUBST:" ^ Subst.ppsubst ~names subst);
939 let (_,p,(ty,l,r,_),m,id) = Equality.open_equality equality in
940 let cicmenv = Subst.apply_subst_metasenv subst (m @ menv) in
943 Equality.symmetric eq_ty l id uri m
947 Some (goalproof, p, id, subst, cicmenv)
952 let check_if_goal_is_identity env = function
953 | (goalproof,m,Cic.Appl[Cic.MutInd(uri,_,ens);eq_ty;left;right])
954 when left = right && LibraryObjects.is_eq_URI uri ->
955 let reflproof = Equality.Exact (Equality.refl_proof uri eq_ty left) in
956 Some (goalproof, reflproof, 0, Subst.empty_subst,m)
957 | (goalproof,m,Cic.Appl[Cic.MutInd(uri,_,ens);eq_ty;left;right])
958 when LibraryObjects.is_eq_URI uri ->
959 (let _,context,_ = env in
962 Inference.unification m m context left right CicUniv.empty_ugraph
964 let reflproof = Equality.Exact (Equality.refl_proof uri eq_ty left) in
965 let m = Subst.apply_subst_metasenv s m in
966 Some (goalproof, reflproof, 0, s,m)
971 let rec check goal = function
975 | None -> check goal tl
976 | (Some p) as ok -> ok
979 let simplify_goal_set env goals ?passive active =
980 let active_goals, passive_goals = goals in
981 let find (_,_,g) where =
982 List.exists (fun (_,_,g1) -> Equality.meta_convertibility g g1) where
985 (fun (acc_a,acc_p) goal ->
986 match simplify_goal env goal ?passive active with
989 if find g acc_p then acc_a,acc_p else acc_a,g::acc_p
991 if find g acc_a then acc_a,acc_p else g::acc_a,acc_p)
992 ([],passive_goals) active_goals
995 let check_if_goals_set_is_solved env active goals =
996 let active_goals, passive_goals = goals in
1003 check_if_goal_is_identity env;
1004 check_if_goal_is_subsumed env (snd active)])
1008 let infer_goal_set env active goals =
1009 let active_goals, passive_goals = goals in
1010 let rec aux = function
1011 | [] -> active_goals, []
1013 let changed,selected = simplify_goal env hd active in
1015 prerr_endline ("--------------- goal semplificato");
1016 let (_,_,t1) = selected in
1018 List.exists (fun (_,_,t) -> Equality.meta_convertibility t t1)
1024 let passive_goals = tl in
1025 let new_passive_goals =
1026 if Utils.metas_of_term t1 = [] then passive_goals
1028 let newmaxmeta,new' =
1029 Indexing.superposition_left env (snd active) selected
1032 maxmeta := newmaxmeta;
1033 passive_goals @ new'
1035 selected::active_goals, new_passive_goals
1041 let infer_goal_set env active goals =
1042 let active_goals, passive_goals = goals in
1043 let rec aux = function
1045 | ((_,_,t1) as hd)::tl when
1048 Equality.meta_convertibility t t1)
1051 let selected = hd in
1052 let passive_goals = tl in
1053 let new_passive_goals =
1054 if CicUtil.is_meta_closed t1 then
1057 let new' = Indexing.superposition_left env (snd active) selected in
1058 passive_goals @ new'
1060 selected::active_goals, new_passive_goals
1067 let infer_goal_set_with_current env current goals active =
1068 let active_goals, passive_goals =
1069 simplify_goal_set env goals active
1071 let l,table,_ = build_table [current] in
1075 let newmaxmeta, new' = Indexing.superposition_left env table g !maxmeta in
1076 maxmeta := newmaxmeta;
1078 passive_goals active_goals
1083 let ids = List.map (fun _,_,i,_,_ -> i) p in
1087 let ids_of_goal_set (ga,gp) =
1088 List.flatten (List.map ids_of_goal ga) @
1089 List.flatten (List.map ids_of_goal gp)
1092 let size_of_goal_set_a (l,_) = List.length l;;
1093 let size_of_goal_set_p (_,l) = List.length l;;
1095 let pp_goals label goals context =
1096 let names = Utils.names_of_context context in
1100 (Printf.sprintf "Current goal: %s = %s\n" label (CicPp.pp g names)))
1105 (Printf.sprintf "PASSIVE goal: %s = %s\n" label (CicPp.pp g names)))
1109 (** given-clause algorithm with full reduction strategy: NEW implementation *)
1110 (* here goals is a set of goals in OR *)
1112 eq_uri ((_,context,_) as env) goals theorems passive active max_iterations max_time
1114 let initial_time = Unix.gettimeofday () in
1115 let iterations_left iterno =
1116 let now = Unix.gettimeofday () in
1117 let time_left = max_time -. now in
1118 let time_spent_until_now = now -. initial_time in
1119 let iteration_medium_cost =
1120 time_spent_until_now /. (float_of_int iterno)
1122 let iterations_left = time_left /. iteration_medium_cost in
1123 int_of_float iterations_left
1125 let rec step goals theorems passive active iterno =
1126 if iterno > max_iterations then
1127 (ParamodulationFailure "No more iterations to spend")
1128 else if Unix.gettimeofday () > max_time then
1129 (ParamodulationFailure "No more time to spend")
1132 let _ = prerr_endline "simpl goal with active" in
1133 let _ = <:start<simplify goal set active>> in
1134 let goals = simplify_goal_set env goals passive active in
1135 let _ = <:stop<simplify goal set active>> in
1139 (Printf.sprintf "%d #ACTIVES: %d #PASSIVES: %d #GOALSET: %d(%d)\n"
1140 iterno (size_of_active active) (size_of_passive passive)
1141 (size_of_goal_set_a goals) (size_of_goal_set_p goals))
1143 (* PRUNING OF PASSIVE THAT WILL NEVER BE PROCESSED *)
1145 let selection_estimate = iterations_left iterno in
1146 let kept = size_of_passive passive in
1147 if kept > selection_estimate then
1149 (*Printf.eprintf "Too many passive equalities: pruning...";
1150 prune_passive selection_estimate active*) passive
1155 kept_clauses := (size_of_passive passive) + (size_of_active active);
1156 let goals = infer_goal_set env active goals in
1157 match check_if_goals_set_is_solved env active goals with
1160 (Printf.sprintf "Found a proof in: %f\n"
1161 (Unix.gettimeofday() -. initial_time));
1162 ParamodulationSuccess p
1165 if passive_is_empty passive then
1166 if no_more_passive_goals goals then
1167 ParamodulationFailure "No more passive equations/goals"
1168 (*maybe this is a success! *)
1170 step goals theorems passive active (iterno+1)
1173 (* COLLECTION OF GARBAGED EQUALITIES *)
1174 if iterno mod 40 = 0 then
1176 let active = List.map Equality.id_of (fst active) in
1177 let passive = List.map Equality.id_of (fst (fst passive)) in
1178 let goal = ids_of_goal_set goals in
1179 Equality.collect active passive goal
1181 let current, passive = select env goals passive in
1182 (* SIMPLIFICATION OF CURRENT *)
1185 Equality.string_of_equality ~env current);
1187 forward_simplify eq_uri env (Utils.Positive, current) active
1190 | None -> step goals theorems passive active (iterno+1)
1194 ("Selected simpl: " ^
1195 Equality.string_of_equality ~env current);
1197 (* GENERATION OF NEW EQUATIONS *)
1198 prerr_endline "infer";
1199 let new' = infer eq_uri env current active in
1200 prerr_endline "infer goal";
1202 match check_if_goals_set_is_solved env active goals with
1205 (Printf.sprintf "Found a proof in: %f\n"
1206 (Unix.gettimeofday() -. initial_time));
1207 ParamodulationSuccess p
1211 let al, tbl = active in
1212 al @ [current], Indexing.index tbl current
1215 infer_goal_set_with_current env current goals active
1217 (* FORWARD AND BACKWARD SIMPLIFICATION *)
1218 prerr_endline "fwd/back simpl";
1219 let rec simplify new' active passive head =
1221 forward_simplify_new eq_uri env new' ~passive active
1223 let active, passive, newa, retained, pruned =
1224 backward_simplify eq_uri env new' ~passive active
1227 List.fold_left filter_dependent passive pruned
1229 match newa, retained with
1230 | None, None -> active, passive, new', head
1232 | None, Some p -> simplify (new' @ p) active passive head
1233 | Some p, Some rp ->
1234 simplify (new' @ p @ rp) active passive (head @ p)
1236 let active, passive, new', head =
1237 simplify new' active passive []
1239 prerr_endline "simpl goal with new";
1241 let a,b,_ = build_table new' in
1242 let _ = <:start<simplify_goal_set new>> in
1243 let rc = simplify_goal_set env goals ~passive (a,b) in
1244 let _ = <:stop<simplify_goal_set new>> in
1247 let passive = add_to_passive passive new' head in
1248 step goals theorems passive active (iterno+1)
1251 step goals theorems passive active 1
1254 let rec saturate_equations eq_uri env goal accept_fun passive active =
1255 elapsed_time := Unix.gettimeofday () -. !start_time;
1256 if !elapsed_time > !time_limit then
1259 let current, passive = select env ([goal],[]) passive in
1260 let res = forward_simplify eq_uri env (Utils.Positive, current) ~passive active in
1263 saturate_equations eq_uri env goal accept_fun passive active
1265 Utils.debug_print (lazy (Printf.sprintf "selected: %s"
1266 (Equality.string_of_equality ~env current)));
1267 let new' = infer eq_uri env current active in
1269 if Equality.is_identity env current then active
1271 let al, tbl = active in
1272 al @ [current], Indexing.index tbl current
1274 (* alla fine new' contiene anche le attive semplificate!
1275 * quindi le aggiungo alle passive insieme alle new *)
1276 let rec simplify new' active passive =
1277 let new' = forward_simplify_new eq_uri env new' ~passive active in
1278 let active, passive, newa, retained, pruned =
1279 backward_simplify eq_uri env new' ~passive active in
1281 List.fold_left filter_dependent passive pruned in
1282 match newa, retained with
1283 | None, None -> active, passive, new'
1285 | None, Some p -> simplify (new' @ p) active passive
1286 | Some p, Some rp -> simplify (new' @ p @ rp) active passive
1288 let active, passive, new' = simplify new' active passive in
1292 (Printf.sprintf "active:\n%s\n"
1295 (fun e -> Equality.string_of_equality ~env e)
1301 (Printf.sprintf "new':\n%s\n"
1304 (fun e -> "Negative " ^
1305 (Equality.string_of_equality ~env e)) new'))))
1307 let new' = List.filter accept_fun new' in
1308 let passive = add_to_passive passive new' [] in
1309 saturate_equations eq_uri env goal accept_fun passive active
1312 let main dbd full term metasenv ugraph = ()
1314 let main dbd full term metasenv ugraph =
1315 let module C = Cic in
1316 let module T = CicTypeChecker in
1317 let module PET = ProofEngineTypes in
1318 let module PP = CicPp in
1319 let proof = None, (1, [], term)::metasenv, C.Meta (1, []), term in
1320 let status = PET.apply_tactic (PrimitiveTactics.intros_tac ()) (proof, 1) in
1321 let proof, goals = status in
1322 let goal' = List.nth goals 0 in
1323 let _, metasenv, meta_proof, _ = proof in
1324 let _, context, goal = CicUtil.lookup_meta goal' metasenv in
1325 let eq_indexes, equalities, maxm = Inference.find_equalities context proof in
1326 let lib_eq_uris, library_equalities, maxm =
1328 Inference.find_library_equalities dbd context (proof, goal') (maxm+2)
1330 let library_equalities = List.map snd library_equalities in
1331 maxmeta := maxm+2; (* TODO ugly!! *)
1332 let irl = CicMkImplicit.identity_relocation_list_for_metavariable context in
1333 let new_meta_goal, metasenv, type_of_goal =
1334 let _, context, ty = CicUtil.lookup_meta goal' metasenv in
1337 (Printf.sprintf "\n\nTIPO DEL GOAL: %s\n\n" (CicPp.ppterm ty)));
1338 Cic.Meta (maxm+1, irl),
1339 (maxm+1, context, ty)::metasenv,
1342 let env = (metasenv, context, ugraph) in
1343 let t1 = Unix.gettimeofday () in
1346 let theorems = Inference.find_library_theorems dbd env (proof, goal') lib_eq_uris in
1347 let context_hyp = Inference.find_context_hypotheses env eq_indexes in
1348 context_hyp @ theorems, []
1351 let us = UriManager.string_of_uri (LibraryObjects.eq_URI ()) in
1352 UriManager.uri_of_string (us ^ "#xpointer(1/1/1)")
1354 let t = CicUtil.term_of_uri refl_equal in
1355 let ty, _ = CicTypeChecker.type_of_aux' [] [] t CicUniv.empty_ugraph in
1358 let t2 = Unix.gettimeofday () in
1361 (Printf.sprintf "Time to retrieve theorems: %.9f\n" (t2 -. t1)));
1366 "Theorems:\n-------------------------------------\n%s\n"
1371 "Term: %s, type: %s" (CicPp.ppterm t) (CicPp.ppterm ty))
1376 ([],Equality.BasicProof (Equality.empty_subst ,new_meta_goal)), [], goal
1378 let equalities = simplify_equalities env
1379 (equalities@library_equalities) in
1380 let active = make_active () in
1381 let passive = make_passive equalities in
1382 Printf.printf "\ncurrent goal: %s\n"
1383 (let _, _, g = goal in CicPp.ppterm g);
1384 Printf.printf "\ncontext:\n%s\n" (PP.ppcontext context);
1385 Printf.printf "\nmetasenv:\n%s\n" (Utils.print_metasenv metasenv);
1386 Printf.printf "\nequalities:\n%s\n"
1389 (Equality.string_of_equality ~env) equalities));
1390 (* (equalities @ library_equalities))); *)
1391 print_endline "--------------------------------------------------";
1392 let start = Unix.gettimeofday () in
1393 print_endline "GO!";
1394 start_time := Unix.gettimeofday ();
1396 let goals = make_goals goal in
1397 (if !use_fullred then given_clause_fullred else given_clause_fullred)
1398 dbd env goals theorems passive active
1400 let finish = Unix.gettimeofday () in
1403 | ParamodulationFailure ->
1404 Printf.printf "NO proof found! :-(\n\n"
1405 | ParamodulationSuccess (Some ((cicproof,cicmenv),(proof, env))) ->
1406 Printf.printf "OK, found a proof!\n";
1407 let oldproof = Equation.build_proof_term proof in
1408 let newproof,_,newenv,_ =
1409 CicRefine.type_of_aux'
1410 cicmenv context cicproof CicUniv.empty_ugraph
1412 (* REMEMBER: we have to instantiate meta_proof, we should use
1413 apply the "apply" tactic to proof and status
1415 let names = Utils.names_of_context context in
1416 prerr_endline "OLD PROOF";
1417 print_endline (PP.pp proof names);
1418 prerr_endline "NEW PROOF";
1419 print_endline (PP.pp newproof names);
1423 let (_, _, _, menv,_) = Equality.open_equality eq in
1430 CicTypeChecker.type_of_aux' newmetasenv context proof ugraph
1432 print_endline (string_of_float (finish -. start));
1434 "\nGOAL was: %s\nPROOF has type: %s\nconvertible?: %s\n\n"
1435 (CicPp.pp type_of_goal names) (CicPp.pp ty names)
1437 (fst (CicReduction.are_convertible
1438 context type_of_goal ty ug)));
1440 Printf.printf "\nEXCEPTION!!! %s\n" (Printexc.to_string e);
1441 Printf.printf "MAXMETA USED: %d\n" !maxmeta;
1442 print_endline (string_of_float (finish -. start));*)
1446 | ParamodulationSuccess None ->
1447 Printf.printf "Success, but no proof?!?\n\n"
1452 ((Printf.sprintf ("infer_time: %.9f\nforward_simpl_time: %.9f\n" ^^
1453 "forward_simpl_new_time: %.9f\n" ^^
1454 "backward_simpl_time: %.9f\n")
1455 !infer_time !forward_simpl_time !forward_simpl_new_time
1456 !backward_simpl_time) ^
1457 (Printf.sprintf "passive_maintainance_time: %.9f\n"
1458 !passive_maintainance_time) ^
1459 (Printf.sprintf " successful unification/matching time: %.9f\n"
1460 !Indexing.match_unif_time_ok) ^
1461 (Printf.sprintf " failed unification/matching time: %.9f\n"
1462 !Indexing.match_unif_time_no) ^
1463 (Printf.sprintf " indexing retrieval time: %.9f\n"
1464 !Indexing.indexing_retrieval_time) ^
1465 (Printf.sprintf " demodulate_term.build_newtarget_time: %.9f\n"
1466 !Indexing.build_newtarget_time) ^
1467 (Printf.sprintf "derived %d clauses, kept %d clauses.\n"
1468 !derived_clauses !kept_clauses))
1472 print_endline ("EXCEPTION: " ^ (Printexc.to_string exc));
1478 let default_depth = !maxdepth
1479 and default_width = !maxwidth;;
1483 symbols_counter := 0;
1484 weight_age_counter := !weight_age_ratio;
1485 processed_clauses := 0;
1488 maximal_retained_equality := None;
1490 forward_simpl_time := 0.;
1491 forward_simpl_new_time := 0.;
1492 backward_simpl_time := 0.;
1493 passive_maintainance_time := 0.;
1494 derived_clauses := 0;
1499 let eq_of_goal = function
1500 | Cic.Appl [Cic.MutInd(uri,0,_);_;_;_] when LibraryObjects.is_eq_URI uri ->
1502 | _ -> raise (ProofEngineTypes.Fail (lazy ("The goal is not an equality ")))
1505 let eq_and_ty_of_goal = function
1506 | Cic.Appl [Cic.MutInd(uri,0,_);t;_;_] when LibraryObjects.is_eq_URI uri ->
1508 | _ -> raise (ProofEngineTypes.Fail (lazy ("The goal is not an equality ")))
1513 dbd ?(full=false) ?(depth=default_depth) ?(width=default_width) status =
1514 let module C = Cic in
1516 Indexing.init_index ();
1519 (* CicUnification.unif_ty := false;*)
1520 let proof, goalno = status in
1521 let uri, metasenv, meta_proof, term_to_prove = proof in
1522 let _, context, type_of_goal = CicUtil.lookup_meta goalno metasenv in
1523 let eq_uri = eq_of_goal type_of_goal in
1524 let cleaned_goal = Utils.remove_local_context type_of_goal in
1525 Utils.set_goal_symbols cleaned_goal;
1526 let names = Utils.names_of_context context in
1527 let eq_indexes, equalities, maxm = Inference.find_equalities context proof in
1528 let ugraph = CicUniv.empty_ugraph in
1529 let env = (metasenv, context, ugraph) in
1530 let goal = [], List.filter (fun (i,_,_)->i<>goalno) metasenv, cleaned_goal in
1532 let t1 = Unix.gettimeofday () in
1533 let lib_eq_uris, library_equalities, maxm =
1534 Inference.find_library_equalities caso_strano dbd context (proof, goalno) (maxm+2)
1536 let library_equalities = List.map snd library_equalities in
1537 let t2 = Unix.gettimeofday () in
1540 simplify_equalities eq_uri env (equalities@library_equalities)
1544 (Printf.sprintf "Time to retrieve equalities: %.9f\n" (t2 -. t1)));
1545 let t1 = Unix.gettimeofday () in
1548 let thms = Inference.find_library_theorems dbd env (proof, goalno) lib_eq_uris in
1549 let context_hyp = Inference.find_context_hypotheses env eq_indexes in
1550 context_hyp @ thms, []
1552 let refl_equal = LibraryObjects.eq_refl_URI ~eq:eq_uri in
1553 let t = CicUtil.term_of_uri refl_equal in
1554 let ty, _ = CicTypeChecker.type_of_aux' [] [] t CicUniv.empty_ugraph in
1557 let t2 = Unix.gettimeofday () in
1562 "Theorems:\n-------------------------------------\n%s\n"
1567 "Term: %s, type: %s"
1568 (CicPp.ppterm t) (CicPp.ppterm ty))
1572 (Printf.sprintf "Time to retrieve theorems: %.9f\n" (t2 -. t1)));
1574 let active = make_active () in
1575 let passive = make_passive equalities in
1576 let start = Unix.gettimeofday () in
1579 let goals = make_goals goal in
1580 given_clause_fullred dbd env goals theorems passive active
1582 let goals = make_goal_set goal in
1583 let max_iterations = 10000 in
1584 let max_time = Unix.gettimeofday () +. 600. (* minutes *) in
1586 eq_uri env goals theorems passive active max_iterations max_time
1588 let finish = Unix.gettimeofday () in
1589 (res, finish -. start)
1592 | ParamodulationFailure s ->
1593 raise (ProofEngineTypes.Fail (lazy ("NO proof found: " ^ s)))
1594 | ParamodulationSuccess
1595 (goalproof,newproof,subsumption_id,subsumption_subst, proof_menv) ->
1596 prerr_endline "OK, found a proof!";
1598 (Equality.pp_proof names goalproof newproof subsumption_subst
1599 subsumption_id type_of_goal);
1600 prerr_endline "ENDOFPROOFS";
1601 (* generation of the CIC proof *)
1603 List.filter (fun i -> i <> goalno)
1604 (ProofEngineHelpers.compare_metasenvs
1605 ~newmetasenv:metasenv ~oldmetasenv:proof_menv)
1607 let goal_proof, side_effects_t =
1608 let initial = Equality.add_subst subsumption_subst newproof in
1609 Equality.build_goal_proof
1610 eq_uri goalproof initial type_of_goal side_effects
1612 prerr_endline ("PROOF: " ^ CicPp.pp goal_proof names);
1613 let goal_proof = Subst.apply_subst subsumption_subst goal_proof in
1614 let metas_still_open_in_proof = Utils.metas_of_term goal_proof in
1615 (*prerr_endline (CicPp.pp goal_proof names);*)
1617 let goal_proof = (* Subst.apply_subst subsumption_subst *) goal_proof in
1618 let side_effects_t =
1619 List.map (Subst.apply_subst subsumption_subst) side_effects_t
1621 (* replacing fake mets with real ones *)
1622 prerr_endline "replacing metas...";
1623 let irl=CicMkImplicit.identity_relocation_list_for_metavariable context in
1624 let goal_proof_menv, what, with_what,free_meta =
1626 (fun (acc1,acc2,acc3,uniq) (i,_,ty) ->
1629 acc1, (Cic.Meta(i,[]))::acc2, m::acc3, uniq
1631 [i,context,ty], (Cic.Meta(i,[]))::acc2,
1632 (Cic.Meta(i,irl)) ::acc3,Some (Cic.Meta(i,irl)))
1635 (fun (i,_,_) -> List.mem i metas_still_open_in_proof)
1639 (* we need this fake equality since the metas of the hypothesis may be
1640 * with a real local context *)
1641 ProofEngineReduction.replace_lifting
1642 ~equality:(fun x y ->
1643 match x,y with Cic.Meta(i,_),Cic.Meta(j,_) -> i=j | _-> false)
1644 ~what ~with_what ~where
1646 let goal_proof = replace goal_proof in
1647 (* ok per le meta libere... ma per quelle che c'erano e sono rimaste?
1648 * what mi pare buono, sostituisce solo le meta farlocche *)
1649 let side_effects_t = List.map replace side_effects_t in
1651 List.filter (fun i -> i <> goalno)
1652 (ProofEngineHelpers.compare_metasenvs
1653 ~oldmetasenv:metasenv ~newmetasenv:goal_proof_menv)
1655 prerr_endline ("freemetas: " ^ String.concat "," (List.map string_of_int free_metas) );
1656 (* check/refine/... build the new proof *)
1658 ProofEngineReduction.replace
1659 ~what:side_effects ~with_what:side_effects_t
1660 ~equality:(fun i t -> match t with Cic.Meta(j,_)->j=i|_->false)
1663 let subst_side_effects,real_menv,_ =
1664 let fail t s = raise (ProofEngineTypes.Fail (lazy (t^Lazy.force s))) in
1665 let free_metas_menv =
1666 List.map (fun i -> CicUtil.lookup_meta i goal_proof_menv) free_metas
1669 CicUnification.fo_unif_subst [] context (metasenv @ free_metas_menv)
1670 replaced_goal type_of_goal CicUniv.empty_ugraph
1672 | CicUnification.UnificationFailure s
1673 | CicUnification.Uncertain s
1674 | CicUnification.AssertFailure s ->
1675 fail "Maybe the local context of metas in the goal was not an IRL" s
1678 (goalno,(context,goal_proof,type_of_goal))::subst_side_effects
1680 prerr_endline ("MENVreal_menv: " ^ CicMetaSubst.ppmetasenv [] real_menv);
1683 CicTypeChecker.type_of_aux' real_menv context goal_proof
1684 CicUniv.empty_ugraph
1686 | CicUtil.Meta_not_found _
1687 | CicTypeChecker.TypeCheckerFailure _
1688 | CicTypeChecker.AssertFailure _
1689 | Invalid_argument "list_fold_left2" as exn ->
1690 prerr_endline "THE PROOF DOES NOT TYPECHECK!";
1691 prerr_endline (CicPp.pp goal_proof names);
1692 prerr_endline "THE PROOF DOES NOT TYPECHECK!";
1695 let proof, real_metasenv =
1696 ProofEngineHelpers.subst_meta_and_metasenv_in_proof
1697 proof goalno (CicMetaSubst.apply_subst final_subst) real_menv
1700 match free_meta with Some(Cic.Meta(m,_)) when m<>goalno ->[m] | _ ->[]
1703 "GOALS APERTI: %s\nMETASENV PRIMA:\n%s\nMETASENV DOPO:\n%s\n"
1704 (String.concat ", " (List.map string_of_int open_goals))
1705 (CicMetaSubst.ppmetasenv [] metasenv)
1706 (CicMetaSubst.ppmetasenv [] real_metasenv);
1707 prerr_endline (Printf.sprintf "\nTIME NEEDED: %8.2f" time);
1711 let retrieve_and_print dbd term metasenv ugraph =
1712 let module C = Cic in
1713 let module T = CicTypeChecker in
1714 let module PET = ProofEngineTypes in
1715 let module PP = CicPp in
1716 let proof = None, (1, [], term)::metasenv, C.Meta (1, []), term in
1717 let status = PET.apply_tactic (PrimitiveTactics.intros_tac ()) (proof, 1) in
1718 let proof, goals = status in
1719 let goal' = List.nth goals 0 in
1720 let uri, metasenv, meta_proof, term_to_prove = proof in
1721 let _, context, type_of_goal = CicUtil.lookup_meta goal' metasenv in
1722 let eq_uri = eq_of_goal type_of_goal in
1723 let eq_indexes, equalities, maxm = Inference.find_equalities context proof in
1724 let ugraph = CicUniv.empty_ugraph in
1725 let env = (metasenv, context, ugraph) in
1726 let t1 = Unix.gettimeofday () in
1727 let lib_eq_uris, library_equalities, maxm =
1728 Inference.find_library_equalities false dbd context (proof, goal') (maxm+2) in
1729 let t2 = Unix.gettimeofday () in
1731 let equalities = (* equalities @ *) library_equalities in
1734 (Printf.sprintf "\n\nequalities:\n%s\n"
1738 (* Printf.sprintf "%s: %s" *)
1739 (UriManager.string_of_uri u)
1740 (* (string_of_equality e) *)
1743 Utils.debug_print (lazy "RETR: SIMPLYFYING EQUALITIES...");
1744 let rec simpl e others others_simpl =
1746 let active = List.map (fun (u, e) -> (Utils.Positive, e))
1747 (others @ others_simpl) in
1750 (fun t (_, e) -> Indexing.index t e)
1751 Indexing.empty active
1753 let res = forward_simplify eq_uri env (Utils.Positive, e) (active, tbl) in
1757 | None -> simpl hd tl others_simpl
1758 | Some e -> simpl hd tl ((u, e)::others_simpl)
1762 | None -> others_simpl
1763 | Some e -> (u, e)::others_simpl
1767 match equalities with
1770 let others = tl in (* List.map (fun e -> (Utils.Positive, e)) tl in *)
1772 List.rev (simpl (*(Positive,*) hd others [])
1776 (Printf.sprintf "\nequalities AFTER:\n%s\n"
1780 Printf.sprintf "%s: %s"
1781 (UriManager.string_of_uri u)
1782 (Equality.string_of_equality e)
1788 (Printf.sprintf "Time to retrieve equalities: %.9f\n" (t2 -. t1)))
1792 let main_demod_equalities dbd term metasenv ugraph =
1793 let module C = Cic in
1794 let module T = CicTypeChecker in
1795 let module PET = ProofEngineTypes in
1796 let module PP = CicPp in
1797 let proof = None, (1, [], term)::metasenv, C.Meta (1, []), term in
1798 let status = PET.apply_tactic (PrimitiveTactics.intros_tac ()) (proof, 1) in
1799 let proof, goals = status in
1800 let goal' = List.nth goals 0 in
1801 let _, metasenv, meta_proof, _ = proof in
1802 let _, context, goal = CicUtil.lookup_meta goal' metasenv in
1803 let eq_uri = eq_of_goal goal in
1804 let eq_indexes, equalities, maxm = Inference.find_equalities context proof in
1805 let lib_eq_uris, library_equalities, maxm =
1806 Inference.find_library_equalities false dbd context (proof, goal') (maxm+2)
1808 let library_equalities = List.map snd library_equalities in
1809 maxmeta := maxm+2; (* TODO ugly!! *)
1810 let irl = CicMkImplicit.identity_relocation_list_for_metavariable context in
1811 let new_meta_goal, metasenv, type_of_goal =
1812 let _, context, ty = CicUtil.lookup_meta goal' metasenv in
1815 (Printf.sprintf "\n\nTRYING TO INFER EQUALITIES MATCHING: %s\n\n"
1816 (CicPp.ppterm ty)));
1817 Cic.Meta (maxm+1, irl),
1818 (maxm+1, context, ty)::metasenv,
1821 let env = (metasenv, context, ugraph) in
1823 let goal = [], [], goal
1826 simplify_equalities eq_uri env (equalities@library_equalities)
1828 let active = make_active () in
1829 let passive = make_passive equalities in
1830 Printf.printf "\ncontext:\n%s\n" (PP.ppcontext context);
1831 Printf.printf "\nmetasenv:\n%s\n" (Utils.print_metasenv metasenv);
1832 Printf.printf "\nequalities:\n%s\n"
1835 (Equality.string_of_equality ~env) equalities));
1836 print_endline "--------------------------------------------------";
1837 print_endline "GO!";
1838 start_time := Unix.gettimeofday ();
1839 if !time_limit < 1. then time_limit := 60.;
1841 saturate_equations eq_uri env goal (fun e -> true) passive active
1845 List.fold_left (fun s e -> EqualitySet.add e s)
1846 EqualitySet.empty equalities
1849 if not (EqualitySet.mem e initial) then EqualitySet.add e s else s
1855 EqualitySet.elements (List.fold_left addfun EqualitySet.empty p)
1859 EqualitySet.elements (List.fold_left addfun EqualitySet.empty l)
1861 Printf.printf "\n\nRESULTS:\nActive:\n%s\n\nPassive:\n%s\n"
1862 (String.concat "\n" (List.map (Equality.string_of_equality ~env) active))
1863 (* (String.concat "\n"
1864 (List.map (fun e -> CicPp.ppterm (term_of_equality e)) active)) *)
1865 (* (String.concat "\n" (List.map (string_of_equality ~env) passive)); *)
1868 (fun e -> CicPp.ppterm (Equality.term_of_equality eq_uri e))
1873 Utils.debug_print (lazy ("EXCEPTION: " ^ (Printexc.to_string e)))
1877 let demodulate_tac ~dbd ((proof,goal)(*s initialstatus*)) =
1878 let curi,metasenv,pbo,pty = proof in
1879 let metano,context,ty = CicUtil.lookup_meta goal metasenv in
1880 let eq_uri = eq_of_goal ty in
1881 let eq_indexes, equalities, maxm =
1882 Inference.find_equalities context proof
1884 let lib_eq_uris, library_equalities, maxm =
1885 Inference.find_library_equalities false dbd context (proof, goal) (maxm+2) in
1886 if library_equalities = [] then prerr_endline "VUOTA!!!";
1887 let irl = CicMkImplicit.identity_relocation_list_for_metavariable context in
1888 let library_equalities = List.map snd library_equalities in
1889 let initgoal = [], [], ty in
1890 let env = (metasenv, context, CicUniv.empty_ugraph) in
1892 simplify_equalities eq_uri env (equalities@library_equalities)
1896 (fun tbl eq -> Indexing.index tbl eq)
1897 Indexing.empty equalities
1899 let changed,(newproof,newmetasenv, newty) =
1900 Indexing.demodulation_goal
1901 (metasenv,context,CicUniv.empty_ugraph) table initgoal
1905 let opengoal = Equality.Exact (Cic.Meta(maxm,irl)) in
1907 Equality.build_goal_proof eq_uri newproof opengoal ty []
1909 let extended_metasenv = (maxm,context,newty)::metasenv in
1910 let extended_status =
1911 (curi,extended_metasenv,pbo,pty),goal in
1912 let (status,newgoals) =
1913 ProofEngineTypes.apply_tactic
1914 (PrimitiveTactics.apply_tac ~term:proofterm)
1916 (status,maxm::newgoals)
1918 else (* if newty = ty then *)
1919 raise (ProofEngineTypes.Fail (lazy "no progress"))
1920 (*else ProofEngineTypes.apply_tactic
1921 (ReductionTactics.simpl_tac
1922 ~pattern:(ProofEngineTypes.conclusion_pattern None)) initialstatus*)
1925 let demodulate_tac ~dbd = ProofEngineTypes.mk_tactic (demodulate_tac ~dbd);;
1927 let rec find_in_ctx i name = function
1928 | [] -> raise (ProofEngineTypes.Fail (lazy ("Hypothesis not found: " ^ name)))
1929 | Some (Cic.Name name', _)::tl when name = name' -> i
1930 | _::tl -> find_in_ctx (i+1) name tl
1933 let rec position_of i x = function
1934 | [] -> assert false
1935 | j::tl when j <> x -> position_of (i+1) x tl
1940 * auto superposition target = NAME
1941 * [table = NAME_LIST] [demod_table = NAME_LIST] [subterms_only]
1943 * - if table is omitted no superposition will be performed
1944 * - if demod_table is omitted no demodulation will be prformed
1945 * - subterms_only is passed to Indexing.superposition_right
1947 * lists are coded using _ (example: H_H1_H2)
1950 let superposition_tac ~target ~table ~subterms_only ~demod_table status =
1952 Indexing.init_index ();
1953 let proof,goalno = status in
1954 let curi,metasenv,pbo,pty = proof in
1955 let metano,context,ty = CicUtil.lookup_meta goalno metasenv in
1956 let eq_uri,tty = eq_and_ty_of_goal ty in
1957 let env = (metasenv, context, CicUniv.empty_ugraph) in
1958 let names = Utils.names_of_context context in
1959 let eq_index, equalities, maxm = Inference.find_equalities context proof in
1961 let what = find_in_ctx 1 target context in
1962 List.nth equalities (position_of 0 what eq_index)
1967 let others = Str.split (Str.regexp "_") table in
1968 List.map (fun other -> find_in_ctx 1 other context) others
1971 (fun other -> List.nth equalities (position_of 0 other eq_index))
1976 let index = List.fold_left Indexing.index Indexing.empty eq_other in
1978 if table = "" then maxm,[eq_what] else
1979 Indexing.superposition_right
1980 ~subterms_only eq_uri maxm env index eq_what
1982 prerr_endline ("Superposition right:");
1983 prerr_endline ("\n eq: " ^ Equality.string_of_equality eq_what ~env);
1984 prerr_endline ("\n table: ");
1985 List.iter (fun e -> prerr_endline (" " ^ Equality.string_of_equality e ~env)) eq_other;
1986 prerr_endline ("\n result: ");
1987 List.iter (fun e -> prerr_endline (Equality.string_of_equality e ~env)) eql;
1988 prerr_endline ("\n result (cut&paste): ");
1991 let t = Equality.term_of_equality eq_uri e in
1992 prerr_endline (CicPp.pp t names))
1994 prerr_endline ("\n result proofs: ");
1996 prerr_endline (let _,p,_,_,_ = Equality.open_equality e in
1997 let s = match p with Equality.Exact _ -> Subst.empty_subst | Equality.Step (s,_) -> s in
1998 Subst.ppsubst s ^ "\n" ^
1999 CicPp.pp (Equality.build_proof_term eq_uri [] 0 p) names)) eql;
2000 if demod_table <> "" then
2003 if eql = [] then [eq_what] else eql
2006 let demod = Str.split (Str.regexp "_") demod_table in
2007 List.map (fun other -> find_in_ctx 1 other context) demod
2011 (fun demod -> List.nth equalities (position_of 0 demod eq_index))
2014 let table = List.fold_left Indexing.index Indexing.empty eq_demod in
2017 (fun (maxm,acc) e ->
2019 Indexing.demodulation_equality
2020 eq_uri maxm env table Utils.Positive e
2025 let eql = List.rev eql in
2026 prerr_endline ("\n result [demod]: ");
2028 (fun e -> prerr_endline (Equality.string_of_equality e ~env)) eql;
2029 prerr_endline ("\n result [demod] (cut&paste): ");
2032 let t = Equality.term_of_equality eq_uri e in
2033 prerr_endline (CicPp.pp t names))
2040 <:show<Saturation.>> ^ Indexing.get_stats () ^ Inference.get_stats () ^
2041 Equality.get_stats ()