From: Enrico Tassi Date: Tue, 6 Oct 2009 11:48:02 +0000 (+0000) Subject: nAuto W.I.P. X-Git-Tag: make_still_working~3373 X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=58ed5ecaefbcb025dedfdf709e6023292559e44a;p=helm.git nAuto W.I.P. --- diff --git a/helm/software/components/grafite_engine/grafiteEngine.ml b/helm/software/components/grafite_engine/grafiteEngine.ml index 871ec01b8..1b6878aba 100644 --- a/helm/software/components/grafite_engine/grafiteEngine.ml +++ b/helm/software/components/grafite_engine/grafiteEngine.ml @@ -534,8 +534,8 @@ let index_obj_for_auto status (uri, height, _, _, kind) = | NCic.Fixpoint _ -> [] | NCic.Inductive _ -> [] | NCic.Constant (_,_,_, ty, _) -> - [ ty, NCic.Const(NReference.reference_of_spec - uri (NReference.Def height)) ] + let ty = (* saturare *) ty in + [ty,NCic.Const(NReference.reference_of_spec uri (NReference.Def height))] in let status = basic_index_obj data status in let dump = record_index_obj data :: status#dump in diff --git a/helm/software/components/ng_tactics/nAuto.ml b/helm/software/components/ng_tactics/nAuto.ml index 60587e1e3..bdcb98969 100644 --- a/helm/software/components/ng_tactics/nAuto.ml +++ b/helm/software/components/ng_tactics/nAuto.ml @@ -49,6 +49,1077 @@ let auto_paramod_tac ~params status = ;; (* =================================== auto =========================== *) +(****************** AUTO ******************** + +let calculate_timeout flags = + if flags.timeout = 0. then + (debug_print (lazy "AUTO WITH NO TIMEOUT"); + {flags with timeout = infinity}) + else + flags +;; +let is_equational_case goalty flags = + let ensure_equational t = + if is_an_equational_goal t then true + else false + in + (flags.use_paramod && is_an_equational_goal goalty) || + (flags.use_only_paramod && ensure_equational goalty) +;; + +type menv = Cic.metasenv +type subst = Cic.substitution +type goal = ProofEngineTypes.goal * int * AutoTypes.sort +let candidate_no = ref 0;; +type candidate = int * Cic.term Lazy.t +type cache = AutoCache.cache + +type fail = + (* the goal (mainly for depth) and key of the goal *) + goal * AutoCache.cache_key +type op = + (* goal has to be proved *) + | D of goal + (* goal has to be cached as a success obtained using candidate as the first + * step *) + | S of goal * AutoCache.cache_key * candidate * int +type elem = + (* menv, subst, size, operations done (only S), operations to do, failures to cache if any op fails *) + menv * subst * int * op list * op list * fail list +type status = + (* list of computations that may lead to the solution: all op list will + * end with the same (S(g,_)) *) + elem list +type auto_result = + (* menv, subst, alternatives, tables, cache *) + | Proved of menv * subst * elem list * AutomationCache.tables * cache + | Gaveup of AutomationCache.tables * cache + + +(* the status exported to the external observer *) +type auto_status = + (* context, (goal,candidate) list, and_list, history *) + Cic.context * (int * Cic.term * bool * int * (int * Cic.term Lazy.t) list) list * + (int * Cic.term * int) list * Cic.term Lazy.t list + +let d_prefix l = + let rec aux acc = function + | (D g)::tl -> aux (acc@[g]) tl + | _ -> acc + in + aux [] l +;; + +let calculate_goal_ty (goalno,_,_) s m = + try + let _,cc,goalty = CicUtil.lookup_meta goalno m in + (* XXX applicare la subst al contesto? *) + Some (cc, CicMetaSubst.apply_subst s goalty) + with CicUtil.Meta_not_found i when i = goalno -> None +;; + +let calculate_closed_goal_ty (goalno,_,_) s = + try + let cc,_,goalty = List.assoc goalno s in + (* XXX applicare la subst al contesto? *) + Some (cc, CicMetaSubst.apply_subst s goalty) + with Not_found -> + None +;; + +let pp_status ctx status = + if debug then + let names = Utils.names_of_context ctx in + let pp x = + let x = + ProofEngineReduction.replace + ~equality:(fun a b -> match b with Cic.Meta _ -> true | _ -> false) + ~what:[Cic.Rel 1] ~with_what:[Cic.Implicit None] ~where:x + in + CicPp.pp x names + in + let string_of_do m s (gi,_,_ as g) d = + match calculate_goal_ty g s m with + | Some (_,gty) -> Printf.sprintf "D(%d, %s, %d)" gi (pp gty) d + | None -> Printf.sprintf "D(%d, _, %d)" gi d + in + let string_of_s m su k (ci,ct) gi = + Printf.sprintf "S(%d, %s, %s, %d)" gi (pp k) (pp (Lazy.force ct)) ci + in + let string_of_ol m su l = + String.concat " | " + (List.map + (function + | D (g,d,s) -> string_of_do m su (g,d,s) d + | S ((gi,_,_),k,c,_) -> string_of_s m su k c gi) + l) + in + let string_of_fl m s fl = + String.concat " | " + (List.map (fun ((i,_,_),ty) -> + Printf.sprintf "(%d, %s)" i (pp ty)) fl) + in + let rec aux = function + | [] -> () + | (m,s,_,_,ol,fl)::tl -> + Printf.eprintf "< [%s] ;;; [%s]>\n" + (string_of_ol m s ol) (string_of_fl m s fl); + aux tl + in + Printf.eprintf "-------------------------- status -------------------\n"; + aux status; + Printf.eprintf "-----------------------------------------------------\n"; +;; + +let auto_status = ref [] ;; +let auto_context = ref [];; +let in_pause = ref false;; +let pause b = in_pause := b;; +let cond = Condition.create ();; +let mutex = Mutex.create ();; +let hint = ref None;; +let prune_hint = ref [];; + +let step _ = Condition.signal cond;; +let give_hint n = hint := Some n;; +let give_prune_hint hint = + prune_hint := hint :: !prune_hint +;; + +let check_pause _ = + if !in_pause then + begin + Mutex.lock mutex; + Condition.wait cond mutex; + Mutex.unlock mutex + end +;; + +let get_auto_status _ = + let status = !auto_status in + let and_list,elems,last = + match status with + | [] -> [],[],[] + | (m,s,_,don,gl,fail)::tl -> + let and_list = + HExtlib.filter_map + (fun (id,d,_ as g) -> + match calculate_goal_ty g s m with + | Some (_,x) -> Some (id,x,d) | None -> None) + (d_goals gl) + in + let rows = + (* these are the S goalsin the or list *) + let orlist = + List.map + (fun (m,s,_,don,gl,fail) -> + HExtlib.filter_map + (function S (g,k,c,_) -> Some (g,k,c) | _ -> None) + (List.rev don @ gl)) + status + in + (* this function eats id from a list l::[id,x] returning x, l *) + let eat_tail_if_eq id l = + let rec aux (s, l) = function + | [] -> s, l + | ((id1,_,_),k1,c)::tl when id = id1 -> + (match s with + | None -> aux (Some c,l) tl + | Some _ -> assert false) + | ((id1,_,_),k1,c as e)::tl -> aux (s, e::l) tl + in + let c, l = aux (None, []) l in + c, List.rev l + in + let eat_in_parallel id l = + let rec aux (b,eaten, new_l as acc) l = + match l with + | [] -> acc + | l::tl -> + match eat_tail_if_eq id l with + | None, l -> aux (b@[false], eaten, new_l@[l]) tl + | Some t,l -> aux (b@[true],eaten@[t], new_l@[l]) tl + in + aux ([],[],[]) l + in + let rec eat_all rows l = + match l with + | [] -> rows + | elem::or_list -> + match List.rev elem with + | ((to_eat,depth,_),k,_)::next_lunch -> + let b, eaten, l = eat_in_parallel to_eat l in + let eaten = HExtlib.list_uniq eaten in + let eaten = List.rev eaten in + let b = true (* List.hd (List.rev b) *) in + let rows = rows @ [to_eat,k,b,depth,eaten] in + eat_all rows l + | [] -> eat_all rows or_list + in + eat_all [] (List.rev orlist) + in + let history = + HExtlib.filter_map + (function (S (_,_,(_,c),_)) -> Some c | _ -> None) + gl + in +(* let rows = List.filter (fun (_,l) -> l <> []) rows in *) + and_list, rows, history + in + !auto_context, elems, and_list, last +;; + +(* Works if there is no dependency over proofs *) +let is_a_green_cut goalty = + CicUtil.is_meta_closed goalty +;; +let rec first_s = function + | (D _)::tl -> first_s tl + | (S (g,k,c,s))::tl -> Some ((g,k,c,s),tl) + | [] -> None +;; +let list_union l1 l2 = + (* TODO ottimizzare compare *) + HExtlib.list_uniq (List.sort compare (l1 @ l1)) +;; +let rec eq_todo l1 l2 = + match l1,l2 with + | (D g1) :: tl1,(D g2) :: tl2 when g1=g2 -> eq_todo tl1 tl2 + | (S (g1,k1,(c1,lt1),i1)) :: tl1, (S (g2,k2,(c2,lt2),i2)) :: tl2 + when i1 = i2 && g1 = g2 && k1 = k2 && c1 = c2 -> + if Lazy.force lt1 = Lazy.force lt2 then eq_todo tl1 tl2 else false + | [],[] -> true + | _ -> false +;; +let eat_head todo id fl orlist = + let rec aux acc = function + | [] -> [], acc + | (m, s, _, _, todo1, fl1)::tl as orlist -> + let rec aux1 todo1 = + match first_s todo1 with + | None -> orlist, acc + | Some (((gno,_,_),_,_,_), todo11) -> + (* TODO confronto tra todo da ottimizzare *) + if gno = id && eq_todo todo11 todo then + aux (list_union fl1 acc) tl + else + aux1 todo11 + in + aux1 todo1 + in + aux fl orlist +;; +let close_proof p ty menv context = + let metas = + List.map fst (CicUtil.metas_of_term p @ CicUtil.metas_of_term ty) + in + let menv = List.filter (fun (i,_,_) -> List.exists ((=)i) metas) menv in + naif_closure p menv context +;; +(* XXX capire bene quando aggiungere alla cache *) +let add_to_cache_and_del_from_orlist_if_green_cut + g s m cache key todo orlist fl ctx size minsize += + let cache = cache_remove_underinspection cache key in + (* prima per fare la irl usavamo il contesto vero e proprio e non quello + * canonico! XXX *) + match calculate_closed_goal_ty g s with + | None -> assert false + | Some (canonical_ctx , gty) -> + let goalno,depth,sort = g in + let irl = mk_irl canonical_ctx in + let goal = Cic.Meta(goalno, irl) in + let proof = CicMetaSubst.apply_subst s goal in + let green_proof, closed_proof = + let b = is_a_green_cut proof in + if not b then + b, (* close_proof proof gty m ctx *) proof + else + b, proof + in + debug_print (lazy ("TENTATIVE CACHE: " ^ CicPp.ppterm key)); + if is_a_green_cut key then + (* if the initia goal was closed, we cut alternatives *) + let _ = debug_print (lazy ("MANGIO: " ^ string_of_int goalno)) in + let orlist, fl = eat_head todo goalno fl orlist in + let cache = + if size < minsize then + (debug_print (lazy ("NO CACHE: 2 (size <= minsize)"));cache) + else + (* if the proof is closed we cache it *) + if green_proof then cache_add_success cache key proof + else (* cache_add_success cache key closed_proof *) + (debug_print (lazy ("NO CACHE: (no gree proof)"));cache) + in + cache, orlist, fl, true + else + let cache = + debug_print (lazy ("TENTATIVE CACHE: " ^ CicPp.ppterm gty)); + if size < minsize then + (debug_print (lazy ("NO CACHE: (size <= minsize)")); cache) else + (* if the substituted goal and the proof are closed we cache it *) + if is_a_green_cut gty then + if green_proof then cache_add_success cache gty proof + else (* cache_add_success cache gty closed_proof *) + (debug_print (lazy ("NO CACHE: (no green proof (gty))"));cache) + else (* + try + let ty, _ = + CicTypeChecker.type_of_aux' ~subst:s + m ctx closed_proof CicUniv.oblivion_ugraph + in + if is_a_green_cut ty then + cache_add_success cache ty closed_proof + else cache + with + | CicTypeChecker.TypeCheckerFailure _ ->*) + (debug_print (lazy ("NO CACHE: (no green gty )"));cache) + in + cache, orlist, fl, false +;; +let close_failures (fl : fail list) (cache : cache) = + List.fold_left + (fun cache ((gno,depth,_),gty) -> + if CicUtil.is_meta_closed gty then + ( debug_print (lazy ("FAIL: INDUCED: " ^ string_of_int gno)); + cache_add_failure cache gty depth) + else + cache) + cache fl +;; +let put_in_subst subst metasenv (goalno,_,_) canonical_ctx t ty = + let entry = goalno, (canonical_ctx, t,ty) in + assert_subst_are_disjoint subst [entry]; + let subst = entry :: subst in + + let metasenv = CicMetaSubst.apply_subst_metasenv subst metasenv in + + subst, metasenv +;; + +let mk_fake_proof metasenv subst (goalno,_,_) goalty context = + None,metasenv,subst ,(lazy (Cic.Meta(goalno,mk_irl context))),goalty, [] +;; + +let equational_case + tables cache depth fake_proof goalno goalty subst context + flags += + let active,passive,bag = tables in + let ppterm = ppterm context in + let status = (fake_proof,goalno) in + if flags.use_only_paramod then + begin + debug_print (lazy ("PARAMODULATION SU: " ^ + string_of_int goalno ^ " " ^ ppterm goalty )); + let goal_steps, saturation_steps, timeout = + max_int,max_int,flags.timeout + in + match + Saturation.given_clause bag status active passive + goal_steps saturation_steps timeout + with + | None, active, passive, bag -> + [], (active,passive,bag), cache, flags + | Some(subst',(_,metasenv,_subst,proof,_, _),open_goals),active, + passive,bag -> + assert_subst_are_disjoint subst subst'; + let subst = subst@subst' in + let open_goals = + order_new_goals metasenv subst open_goals ppterm + in + let open_goals = + List.map (fun (x,sort) -> x,depth-1,sort) open_goals + in + incr candidate_no; + [(!candidate_no,proof),metasenv,subst,open_goals], + (active,passive,bag), cache, flags + end + else + begin + debug_print (lazy ("NARROWING DEL GOAL: " ^ + string_of_int goalno ^ " " ^ ppterm goalty )); + let goal_steps, saturation_steps, timeout = + 1,0,flags.timeout + in + match + Saturation.solve_narrowing bag status active passive goal_steps + with + | None, active, passive, bag -> + [], (active,passive,bag), cache, flags + | Some(subst',(_,metasenv,_subst,proof,_, _),open_goals),active, + passive,bag -> + assert_subst_are_disjoint subst subst'; + let subst = subst@subst' in + let open_goals = + order_new_goals metasenv subst open_goals ppterm + in + let open_goals = + List.map (fun (x,sort) -> x,depth-1,sort) open_goals + in + incr candidate_no; + [(!candidate_no,proof),metasenv,subst,open_goals], + (active,passive,bag), cache, flags + end +(* + begin + let params = ([],["use_context","false"]) in + let automation_cache = { + AutomationCache.tables = tables ; + AutomationCache.univ = Universe.empty; } + in + try + let ((_,metasenv,subst,_,_,_),open_goals) = + + solve_rewrite ~params ~automation_cache + (fake_proof, goalno) + in + let proof = lazy (Cic.Meta (-1,[])) in + [(!candidate_no,proof),metasenv,subst,[]],tables, cache, flags + with ProofEngineTypes.Fail _ -> [], tables, cache, flags +(* + let res = Saturation.all_subsumed bag status active passive in + let res' = + List.map + (fun (subst',(_,metasenv,_subst,proof,_, _),open_goals) -> + assert_subst_are_disjoint subst subst'; + let subst = subst@subst' in + let open_goals = + order_new_goals metasenv subst open_goals ppterm + in + let open_goals = + List.map (fun (x,sort) -> x,depth-1,sort) open_goals + in + incr candidate_no; + (!candidate_no,proof),metasenv,subst,open_goals) + res + in + res', (active,passive,bag), cache, flags +*) + end +*) +;; + +let sort_new_elems = + List.sort (fun (_,_,_,l1) (_,_,_,l2) -> + let p1 = List.length (prop_only l1) in + let p2 = List.length (prop_only l2) in + if p1 = p2 then List.length l1 - List.length l2 else p1-p2) +;; + + +let try_candidate dbd + goalty tables subst fake_proof goalno depth context cand += + let ppterm = ppterm context in + try + let actives, passives, bag = tables in + let (_,metasenv,subst,_,_,_), open_goals = + ProofEngineTypes.apply_tactic + (PrimitiveTactics.apply_tac ~term:cand) + (fake_proof,goalno) + in + let tables = actives, passives, + Equality.push_maxmeta bag + (max (Equality.maxmeta bag) (CicMkImplicit.new_meta metasenv subst)) + in + debug_print (lazy (" OK: " ^ ppterm cand)); + let metasenv = CicRefine.pack_coercion_metasenv metasenv in + let open_goals = order_new_goals metasenv subst open_goals ppterm in + let open_goals = List.map (fun (x,sort) -> x,depth-1,sort) open_goals in + incr candidate_no; + Some ((!candidate_no,lazy cand),metasenv,subst,open_goals), tables + with + | ProofEngineTypes.Fail s -> None,tables + | CicUnification.Uncertain s -> None,tables +;; + +let applicative_case dbd + tables depth subst fake_proof goalno goalty metasenv context + signature universe cache flags += + (* let goalty_aux = + match goalty with + | Cic.Appl (hd::tl) -> + Cic.Appl (hd :: HExtlib.mk_list (Cic.Meta (0,[])) (List.length tl)) + | _ -> goalty + in *) + let goalty_aux = goalty in + let candidates = + get_candidates flags.skip_trie_filtering universe cache goalty_aux + in + (* if the goal is an equality we skip the congruence theorems + let candidates = + if is_equational_case goalty flags + then List.filter not_default_eq_term candidates + else candidates + in *) + let candidates = List.filter (only signature context metasenv) candidates + in + let tables, elems = + List.fold_left + (fun (tables,elems) cand -> + match + try_candidate dbd goalty + tables subst fake_proof goalno depth context cand + with + | None, tables -> tables, elems + | Some x, tables -> tables, x::elems) + (tables,[]) candidates + in + let elems = sort_new_elems elems in + elems, tables, cache +;; + +let try_smart_candidate dbd + goalty tables subst fake_proof goalno depth context cand += + let ppterm = ppterm context in + try + let params = ([],[]) in + let automation_cache = { + AutomationCache.tables = tables ; + AutomationCache.univ = Universe.empty; } + in + debug_print (lazy ("candidato per " ^ string_of_int goalno + ^ ": " ^ CicPp.ppterm cand)); +(* + let (_,metasenv,subst,_,_,_) = fake_proof in + prerr_endline ("metasenv:\n" ^ CicMetaSubst.ppmetasenv [] metasenv); + prerr_endline ("subst:\n" ^ CicMetaSubst.ppsubst ~metasenv subst); +*) + let ((_,metasenv,subst,_,_,_),open_goals) = + apply_smart ~dbd ~term:cand ~params ~automation_cache + (fake_proof, goalno) + in + let metasenv = CicRefine.pack_coercion_metasenv metasenv in + let open_goals = order_new_goals metasenv subst open_goals ppterm in + let open_goals = List.map (fun (x,sort) -> x,depth-1,sort) open_goals in + incr candidate_no; + Some ((!candidate_no,lazy cand),metasenv,subst,open_goals), tables + with + | ProofEngineTypes.Fail s -> None,tables + | CicUnification.Uncertain s -> None,tables +;; + +let smart_applicative_case dbd + tables depth subst fake_proof goalno goalty metasenv context signature + universe cache flags += + let goalty_aux = + match goalty with + | Cic.Appl (hd::tl) -> + Cic.Appl (hd :: HExtlib.mk_list (Cic.Meta (0,[])) (List.length tl)) + | _ -> goalty + in + let smart_candidates = + get_candidates flags.skip_trie_filtering universe cache goalty_aux + in + let candidates = + get_candidates flags.skip_trie_filtering universe cache goalty + in + let smart_candidates = + List.filter + (fun x -> not(List.mem x candidates)) smart_candidates + in + let debug_msg = + (lazy ("smart_candidates" ^ " = " ^ + (String.concat "\n" (List.map CicPp.ppterm smart_candidates)))) in + debug_print debug_msg; + let candidates = List.filter (only signature context metasenv) candidates in + let smart_candidates = + List.filter (only signature context metasenv) smart_candidates + in +(* + let penalty cand depth = + if only signature context metasenv cand then depth else ((prerr_endline ( + "penalizzo " ^ CicPp.ppterm cand));depth -1) + in +*) + let tables, elems = + List.fold_left + (fun (tables,elems) cand -> + match + try_candidate dbd goalty + tables subst fake_proof goalno depth context cand + with + | None, tables -> + (* if normal application fails we try to be smart *) + (match try_smart_candidate dbd goalty + tables subst fake_proof goalno depth context cand + with + | None, tables -> tables, elems + | Some x, tables -> tables, x::elems) + | Some x, tables -> tables, x::elems) + (tables,[]) candidates + in + let tables, smart_elems = + List.fold_left + (fun (tables,elems) cand -> + match + try_smart_candidate dbd goalty + tables subst fake_proof goalno depth context cand + with + | None, tables -> tables, elems + | Some x, tables -> tables, x::elems) + (tables,[]) smart_candidates + in + let elems = sort_new_elems (elems @ smart_elems) in + elems, tables, cache +;; + +let equational_and_applicative_case dbd + signature universe flags m s g gty tables cache context += + let goalno, depth, sort = g in + let fake_proof = mk_fake_proof m s g gty context in + if is_equational_case gty flags then + let elems,tables,cache, flags = + equational_case tables cache + depth fake_proof goalno gty s context flags + in + let more_elems, tables, cache = + if flags.use_only_paramod then + [],tables, cache + else + applicative_case dbd + tables depth s fake_proof goalno + gty m context signature universe cache flags + in + elems@more_elems, tables, cache, flags + else + let elems, tables, cache = + match LibraryObjects.eq_URI () with + | Some _ -> + smart_applicative_case dbd tables depth s fake_proof goalno + gty m context signature universe cache flags + | None -> + applicative_case dbd tables depth s fake_proof goalno + gty m context signature universe cache flags + in + elems, tables, cache, flags +;; +let rec condition_for_hint i = function + | [] -> false + | S (_,_,(j,_),_):: tl -> j <> i (* && condition_for_hint i tl *) + | _::tl -> condition_for_hint i tl +;; +let prunable_for_size flags s m todo = + let rec aux b = function + | (S _)::tl -> aux b tl + | (D (_,_,T))::tl -> aux b tl + | (D g)::tl -> + (match calculate_goal_ty g s m with + | None -> aux b tl + | Some (canonical_ctx, gty) -> + let gsize, _ = + Utils.weight_of_term + ~consider_metas:false ~count_metas_occurrences:true gty in + let newb = b || gsize > flags.maxgoalsizefactor in + aux newb tl) + | [] -> b + in + aux false todo + +(* +let prunable ty todo = + let rec aux b = function + | (S(_,k,_,_))::tl -> aux (b || Equality.meta_convertibility k ty) tl + | (D (_,_,T))::tl -> aux b tl + | D _::_ -> false + | [] -> b + in + aux false todo +;; +*) + +let prunable menv subst ty todo = + let rec aux = function + | (S(_,k,_,_))::tl -> + (match Equality.meta_convertibility_subst k ty menv with + | None -> aux tl + | Some variant -> + no_progress variant tl (* || aux tl*)) + | (D (_,_,T))::tl -> aux tl + | _ -> false + and no_progress variant = function + | [] -> (*prerr_endline "++++++++++++++++++++++++ no_progress";*) true + | D ((n,_,P) as g)::tl -> + (match calculate_goal_ty g subst menv with + | None -> no_progress variant tl + | Some (_, gty) -> + (match calculate_goal_ty g variant menv with + | None -> assert false + | Some (_, gty') -> + if gty = gty' then no_progress variant tl +(* +(prerr_endline (string_of_int n); + prerr_endline (CicPp.ppterm gty); + prerr_endline (CicPp.ppterm gty'); + prerr_endline "---------- subst"; + prerr_endline (CicMetaSubst.ppsubst ~metasenv:menv subst); + prerr_endline "---------- variant"; + prerr_endline (CicMetaSubst.ppsubst ~metasenv:menv variant); + prerr_endline "---------- menv"; + prerr_endline (CicMetaSubst.ppmetasenv [] menv); + no_progress variant tl) *) + else false)) + | _::tl -> no_progress variant tl + in + aux todo + +;; +let condition_for_prune_hint prune (m, s, size, don, todo, fl) = + let s = + HExtlib.filter_map (function S (_,_,(c,_),_) -> Some c | _ -> None) todo + in + List.for_all (fun i -> List.for_all (fun j -> i<>j) prune) s +;; +let filter_prune_hint c l = + let prune = !prune_hint in + prune_hint := []; (* possible race... *) + if prune = [] then c,l + else + cache_reset_underinspection c, + List.filter (condition_for_prune_hint prune) l +;; + + + +let + auto_all_solutions dbd tables universe cache context metasenv gl flags += + let signature = + List.fold_left + (fun set g -> + MetadataConstraints.UriManagerSet.union set + (MetadataQuery.signature_of metasenv g) + ) + MetadataConstraints.UriManagerSet.empty gl + in + let goals = order_new_goals metasenv [] gl CicPp.ppterm in + let goals = + List.map + (fun (x,s) -> D (x,flags.maxdepth,s)) goals + in + let elems = [metasenv,[],1,[],goals,[]] in + let rec aux tables solutions cache elems flags = + match auto_main dbd tables context flags signature universe cache elems with + | Gaveup (tables,cache) -> + solutions,cache, tables + | Proved (metasenv,subst,others,tables,cache) -> + if Unix.gettimeofday () > flags.timeout then + ((subst,metasenv)::solutions), cache, tables + else + aux tables ((subst,metasenv)::solutions) cache others flags + in + let rc = aux tables [] cache elems flags in + match rc with + | [],cache,tables -> [],cache,tables + | solutions, cache,tables -> + let solutions = + HExtlib.filter_map + (fun (subst,newmetasenv) -> + let opened = + ProofEngineHelpers.compare_metasenvs ~oldmetasenv:metasenv ~newmetasenv + in + if opened = [] then Some subst else None) + solutions + in + solutions,cache,tables +;; + +(******************* AUTO ***************) + + +let auto dbd flags metasenv tables universe cache context metasenv gl = + let initial_time = Unix.gettimeofday() in + let signature = + List.fold_left + (fun set g -> + MetadataConstraints.UriManagerSet.union set + (MetadataQuery.signature_of metasenv g) + ) + MetadataConstraints.UriManagerSet.empty gl + in + let goals = order_new_goals metasenv [] gl CicPp.ppterm in + let goals = List.map (fun (x,s) -> D(x,flags.maxdepth,s)) goals in + let elems = [metasenv,[],1,[],goals,[]] in + match auto_main dbd tables context flags signature universe cache elems with + | Proved (metasenv,subst,_, tables,cache) -> + debug_print(lazy + ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time))); + Some (subst,metasenv), cache + | Gaveup (tables,cache) -> + debug_print(lazy + ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time))); + None,cache +;; + +let auto_tac ~(dbd:HSql.dbd) ~params:(univ,params) ~automation_cache (proof, goal) = + let flags = flags_of_params params () in + let use_library = flags.use_library in + let universe, tables, cache = + init_cache_and_tables + ~dbd ~use_library ~use_context:(not flags.skip_context) + automation_cache univ (proof, goal) + in + let _,metasenv,subst,_,_, _ = proof in + let _,context,goalty = CicUtil.lookup_meta goal metasenv in + let signature = MetadataQuery.signature_of metasenv goal in + let signature = + List.fold_left + (fun set t -> + let ty, _ = + CicTypeChecker.type_of_aux' metasenv context t + CicUniv.oblivion_ugraph + in + MetadataConstraints.UriManagerSet.union set + (MetadataConstraints.constants_of ty) + ) + signature univ + in + let tables,cache = + if flags.close_more then + close_more + tables context (proof, goal) + (auto_all_solutions dbd) signature universe cache + else tables,cache in + let initial_time = Unix.gettimeofday() in + let (_,oldmetasenv,_,_,_, _) = proof in + hint := None; + let elem = + metasenv,subst,1,[],[D (goal,flags.maxdepth,P)],[] + in + match auto_main dbd tables context flags signature universe cache [elem] with + | Proved (metasenv,subst,_, tables,cache) -> + debug_print (lazy + ("TIME:"^string_of_float(Unix.gettimeofday()-.initial_time))); + let proof,metasenv = + ProofEngineHelpers.subst_meta_and_metasenv_in_proof + proof goal subst metasenv + in + let opened = + ProofEngineHelpers.compare_metasenvs ~oldmetasenv + ~newmetasenv:metasenv + in + proof,opened + | Gaveup (tables,cache) -> + debug_print + (lazy ("TIME:"^ + string_of_float(Unix.gettimeofday()-.initial_time))); + raise (ProofEngineTypes.Fail (lazy "Auto gave up")) +;; +*) + +module CacheElem : Set.OrderedType = + struct + type t = + | Failed_in of int * NCic.term (* depth, goal type *) + | Succeded of Cic.term * Cic.term (* proof, proof type *) + | UnderInspection of Cic.term (* avoid looping *) + + let compare = Pervasives.compare + end + +module CacheSet = Set.Make(CacheElem) +module Cache = + Discrimination_tree.Make(NDiscriminationTree.NCicIndexable)(CacheSet) + +type cache_examination_result = + [ `Failed_in of int + | `UnderInspection + | `Succeded of NCic.term + | `NotFound + ] + +type sort = T | P +type goal = int * int * sort +type fail = goal * NCic.term +type candidate = NCic.term +type menv = NCic.metasenv +type subst = NCic.substitution + +type op = + (* goal has to be proved *) + | D of goal + (* goal has to be cached as a success obtained using candidate as the first + * step *) + | S of goal * Cache.input * candidate (* int was minsize *) +type elem = + (* menv, subst, size, operations done (only S), operations to do, + * failures to cache if any op fails *) + menv * subst * int * op list * op list * fail list + +type auto_status = + (* list of computations that may lead to the solution: all op list will + * end with the same (S(g,_)) *) + elem list * Cache.t + +type auto_result = + | Gaveup + | Proved of menv * subst * auto_status (* the alternative proofs *) + +type flags = { + do_types : bool; (* solve goals in Type *) + maxwidth : int; + maxsize : int; + timeout : float; +} + +let close_failures = assert false;; +let equational_and_applicative_case = assert false;; +let prunable = assert false;; +let cache_examine = assert false;; +let put_in_subst = assert false;; +let calculate_goal_ty = assert false;; +let add_to_cache_and_del_from_orlist_if_green_cut = assert false;; +let cache_add_underinspection = assert false;; + +let d_goals l = + let rec aux acc = function + | (D g)::tl -> aux (acc@[g]) tl + | (S _)::tl -> aux acc tl + | [] -> acc + in + aux [] l +;; +let prop_only l = + List.filter (function (_,_,P) -> true | _ -> false) l +;; +let remove_s_from_fl (id,_,_) (fl : fail list) = + let rec aux = function + | [] -> [] + | ((id1,_,_),_)::tl when id = id1 -> tl + | hd::tl -> hd :: aux tl + in + aux fl +;; + +let auto_main status context flags signature elems cache = + let rec aux (elems, cache : auto_status) = +(* processa le hint dell'utente *) +(* let cache, elems = filter_prune_hint cache elems in *) + match elems with +(* USER HINT + | (m, s, size, don, todo, fl)::orlist when !hint <> None -> + debug_print (lazy "skip"); + (match !hint with + | Some i when condition_for_hint i todo -> + aux tables flags cache orlist + | _ -> + hint := None; + aux tables flags cache elems) +*) + | [] -> + (* complete failure *) + debug_print (lazy "gave up"); + Gaveup + | (m, s, _, _, [],_)::orlist -> + (* complete success *) + debug_print (lazy "success"); + Proved (m, s, (orlist, cache)) + | (m, s, size, don, (D (_,_,T))::todo, fl)::orlist + when not flags.do_types -> + (* skip since not Prop, don't even check if closed by side-effect *) + debug_print (lazy "skip goal in Type"); + aux ((m, s, size, don, todo, fl)::orlist, cache) + | (m, s, size, don, (S(g, key, c) as op)::todo, fl)::orlist -> + (* partial success, cache g and go on *) + let cache, orlist, fl, sibling_pruned = + add_to_cache_and_del_from_orlist_if_green_cut + g s m cache key todo orlist fl context size + in + let fl = remove_s_from_fl g fl in + let don = if sibling_pruned then don else op::don in + aux ((m, s, size, don, todo, fl)::orlist, cache) + | (m, s, size, don, todo, fl)::orlist + when List.length(prop_only (d_goals todo)) > flags.maxwidth -> + debug_print (lazy ("FAIL: WIDTH")); + aux (orlist, cache) + | (m, s, size, don, todo, fl)::orlist when size > flags.maxsize -> + debug_print (lazy ("FAIL: SIZE: "^string_of_int size ^ + " > " ^ string_of_int flags.maxsize )); + aux (orlist, cache) + | _ when Unix.gettimeofday () > flags.timeout -> + debug_print (lazy ("FAIL: TIMEOUT")); + Gaveup + | (m, s, size, don, (D (gno,depth,_ as g))::todo, fl)::orlist as status -> + debug_print (lazy "attack goal"); + match calculate_goal_ty g s m with + | None -> + debug_print (lazy ("SUCCESS: SIDE EFFECT: " ^ string_of_int gno)); + aux ((m,s,size,don,todo, fl)::orlist, cache) + | Some (canonical_ctx, gty) -> + debug_print (lazy ("EXAMINE: "^ + NCicPp.ppterm ~metasenv:m ~subst:s ~context gty)); + match cache_examine cache gty with + | `Failed_in d when d >= depth -> + debug_print (lazy ("FAIL: DEPTH (cache): "^string_of_int gno)); + let cache = close_failures fl cache in + aux (orlist, cache) + | `UnderInspection -> + debug_print (lazy ("FAIL: LOOP: " ^ string_of_int gno)); + let cache = close_failures fl cache in + aux (orlist,cache) + | `Succeded t -> + debug_print (lazy ("SUCCESS: CACHE HIT: " ^ string_of_int gno)); + let s, m = put_in_subst s m g canonical_ctx t gty in + aux ((m, s, size, don,todo, fl)::orlist, cache) + | `Notfound + | `Failed_in _ when depth > 0 -> + ( (* more depth or is the first time we see the goal *) + if prunable m s gty todo then + (debug_print (lazy( "FAIL: LOOP: one father is equal")); + let cache = close_failures fl cache in + aux (orlist,cache)) + else + let cache = cache_add_underinspection cache gty depth in + debug_print (lazy ("INSPECTING: " ^ + string_of_int gno ^ "("^ string_of_int size ^ "): "^ + NCicPp.ppterm ~metasenv:m ~subst:s ~context gty)); + (* elems are possible computations for proving gty *) + let elems = + equational_and_applicative_case + signature status flags m s g gty cache context + in + if elems = [] then + (* this goal has failed *) + let cache = close_failures ((g,gty)::fl) cache in + aux (orlist, cache) + else + let size_gl l = List.length + (List.filter (function (_,_,P) -> true | _ -> false) l) + in + let elems = + let inj_gl gl = List.map (fun g -> D g) gl in + let rec map = function + | [] -> assert false + | (cand,m,s,gl)::[] -> + let todo = + inj_gl gl @ (S(g,gty,cand))::todo + in + (* we are the last in OR, we fail on g and + * also on all failures implied by g *) + (m,s, size + size_gl gl, don, todo, (g,gty)::fl) + :: orlist + | (cand,m,s,gl)::tl -> + let todo = + inj_gl gl @ (S(g,gty,cand))::todo + in + (m,s, size + size_gl gl, don, todo, []) :: map tl + in + map elems + in + aux (elems, cache)) + | _ -> + debug_print (lazy ("FAIL: DEPTH: " ^ string_of_int gno)); + let cache = close_failures fl cache in + aux (orlist, cache) + in + (aux (elems, cache) : auto_result) +;; + let auto_tac ~params status = prerr_endline "I teoremi noti sono"; NDiscriminationTree.DiscriminationTree.iter status#auto_cache @@ -60,6 +1131,7 @@ let auto_tac ~params status = status ;; + (* ========================= dispatching of auto/auto_paramod ============ *) let auto_tac ~params:(_,flags as params) = if List.mem_assoc "paramodulation" flags then