+let simplify_goal env goal ?passive (active_list, active_table) =
+ let pl, passive_table =
+ match passive with
+ | None -> [], None
+ | Some ((pn, _), (pp, _), pt) ->
+ let pn = List.map (fun e -> (Negative, e)) pn
+ and pp = List.map (fun e -> (Positive, e)) pp in
+ pn @ pp, Some pt
+ in
+ let all = if pl = [] then active_list else active_list @ pl in
+
+ let demodulate table goal =
+ let newmeta, newgoal =
+ Indexing.demodulation_goal !maxmeta env table goal in
+ maxmeta := newmeta;
+ goal != newgoal, newgoal
+ in
+ let changed, goal =
+ match passive_table with
+ | None -> demodulate active_table goal
+ | Some passive_table ->
+ let changed, goal = demodulate active_table goal in
+ let changed', goal = demodulate passive_table goal in
+ (changed || changed'), goal
+ in
+(* let _ = *)
+(* let p, _, t = goal in *)
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf "Goal after demodulation: %s, %s" *)
+(* (string_of_proof p) (CicPp.ppterm t))) *)
+(* in *)
+ changed, goal
+;;
+
+
+let simplify_goals env goals ?passive active =
+ let a_goals, p_goals = goals in
+ let p_goals =
+ List.map
+ (fun (d, gl) ->
+ let gl =
+ List.map (fun g -> snd (simplify_goal env g ?passive active)) gl in
+ d, gl)
+ p_goals
+ in
+ let goals =
+ List.fold_left
+ (fun (a, p) (d, gl) ->
+ let changed = ref false in
+ let gl =
+ List.map
+ (fun g ->
+ let c, g = simplify_goal env g ?passive active in
+ changed := !changed || c; g) gl in
+ if !changed then (a, (d, gl)::p) else ((d, gl)::a, p))
+ ([], p_goals) a_goals
+ in
+ goals
+;;
+
+
+let simplify_theorems env theorems ?passive (active_list, active_table) =
+ let pl, passive_table =
+ match passive with
+ | None -> [], None
+ | Some ((pn, _), (pp, _), pt) ->
+ let pn = List.map (fun e -> (Negative, e)) pn
+ and pp = List.map (fun e -> (Positive, e)) pp in
+ pn @ pp, Some pt
+ in
+ let all = if pl = [] then active_list else active_list @ pl in
+ let a_theorems, p_theorems = theorems in
+ let demodulate table theorem =
+ let newmeta, newthm =
+ Indexing.demodulation_theorem !maxmeta env table theorem in
+ maxmeta := newmeta;
+ theorem != newthm, newthm
+ in
+ let foldfun table (a, p) theorem =
+ let changed, theorem = demodulate table theorem in
+ if changed then (a, theorem::p) else (theorem::a, p)
+ in
+ let mapfun table theorem = snd (demodulate table theorem) in
+ match passive_table with
+ | None ->
+ let p_theorems = List.map (mapfun active_table) p_theorems in
+ List.fold_left (foldfun active_table) ([], p_theorems) a_theorems
+(* List.map (demodulate active_table) theorems *)
+ | Some passive_table ->
+ let p_theorems = List.map (mapfun active_table) p_theorems in
+ let p_theorems, a_theorems =
+ List.fold_left (foldfun active_table) ([], p_theorems) a_theorems in
+ let p_theorems = List.map (mapfun passive_table) p_theorems in
+ List.fold_left (foldfun passive_table) ([], p_theorems) a_theorems
+(* let theorems = List.map (demodulate active_table) theorems in *)
+(* List.map (demodulate passive_table) theorems *)
+;;
+
+
+let apply_equality_to_goal env equality goal =
+ let module C = Cic in
+ let module HL = HelmLibraryObjects in
+ let module I = Inference in
+ let metasenv, context, ugraph = env in
+ let _, proof, (ty, left, right, _), metas, args = equality in
+ let eqterm =
+ C.Appl [C.MutInd (LibraryObjects.eq_URI (), 0, []); ty; left; right] in
+ let gproof, gmetas, gterm = goal in
+ try
+ let subst, metasenv', _ =
+ let menv = metasenv @ metas @ gmetas in
+ Inference.unification menv context eqterm gterm ugraph
+ in
+ let newproof =
+ match proof with
+ | I.BasicProof t -> I.BasicProof (CicMetaSubst.apply_subst subst t)
+ | I.ProofBlock (s, uri, nt, t, pe, p) ->
+ I.ProofBlock (subst @ s, uri, nt, t, pe, p)
+ | _ -> assert false
+ in
+ let newgproof =
+ let rec repl = function
+ | I.ProofGoalBlock (_, gp) -> I.ProofGoalBlock (newproof, gp)
+ | I.NoProof -> newproof
+ | I.BasicProof p -> newproof
+ | I.SubProof (t, i, p) -> I.SubProof (t, i, repl p)
+ | _ -> assert false
+ in
+ repl gproof
+ in
+ true, subst, newgproof
+ with CicUnification.UnificationFailure _ ->
+ false, [], I.NoProof
+;;
+
+
+(*
+let apply_to_goal env theorems active (depth, goals) =
+ let _ =
+ debug_print ("apply_to_goal: " ^ (string_of_int (List.length goals)))
+ in
+ let metasenv, context, ugraph = env in
+ let goal = List.hd goals in
+ let proof, metas, term = goal in
+(* debug_print *)
+(* (Printf.sprintf "apply_to_goal with goal: %s" (CicPp.ppterm term)); *)
+ let newmeta = CicMkImplicit.new_meta metasenv [] in
+ let metasenv = (newmeta, context, term)::metasenv @ metas in
+ let irl = CicMkImplicit.identity_relocation_list_for_metavariable context in
+ let status =
+ ((None, metasenv, Cic.Meta (newmeta, irl), term), newmeta)
+ in
+ let rec aux = function
+ | [] -> false, [] (* goals *) (* None *)
+ | (theorem, thmty, _)::tl ->
+ try
+ let subst_in, (newproof, newgoals) =
+ PrimitiveTactics.apply_tac_verbose ~term:theorem status
+ in
+ if newgoals = [] then
+ let _, _, p, _ = newproof in
+ let newp =
+ let rec repl = function
+ | Inference.ProofGoalBlock (_, gp) ->
+ Inference.ProofGoalBlock (Inference.BasicProof p, gp)
+ | Inference.NoProof -> Inference.BasicProof p
+ | Inference.BasicProof _ -> Inference.BasicProof p
+ | Inference.SubProof (t, i, p2) ->
+ Inference.SubProof (t, i, repl p2)
+ | _ -> assert false
+ in
+ repl proof
+ in
+ true, [[newp, metas, term]] (* Some newp *)
+ else if List.length newgoals = 1 then
+ let _, menv, p, _ = newproof in
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable context
+ in
+ let goals =
+ List.map
+ (fun i ->
+ let _, _, ty = CicUtil.lookup_meta i menv in
+ let proof =
+ Inference.SubProof
+ (p, i, Inference.BasicProof (Cic.Meta (i, irl)))
+ in (proof, menv, ty))
+ newgoals
+ in
+ let res, others = aux tl in
+ if res then (true, others) else (false, goals::others)
+ else
+ aux tl
+ with ProofEngineTypes.Fail msg ->
+ (* debug_print ("FAIL!!:" ^ msg); *)
+ aux tl
+ in
+ let r, l =
+ if Inference.term_is_equality term then
+ let rec appleq = function
+ | [] -> false, []
+ | (Positive, equality)::tl ->
+ let ok, _, newproof = apply_equality_to_goal env equality goal in
+ if ok then true, [(depth, [newproof, metas, term])] else appleq tl
+ | _::tl -> appleq tl
+ in
+ let al, _ = active in
+ appleq al
+ else
+ false, []
+ in
+ if r = true then r, l else
+ let r, l = aux theorems in
+ if r = true then
+ r, List.map (fun l -> (depth+1, l)) l
+ else
+ r, (depth, goals)::(List.map (fun l -> (depth+1, l)) l)
+;;
+*)
+
+
+let new_meta () =
+ incr maxmeta; !maxmeta
+;;
+
+
+let apply_to_goal env theorems active goal =
+ let metasenv, context, ugraph = env in
+ let proof, metas, term = goal in
+ debug_print
+ (lazy
+ (Printf.sprintf "apply_to_goal with goal: %s"
+ (* (string_of_proof proof) *)(CicPp.ppterm term)));
+ let status =
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable context in
+ let proof', newmeta =
+ let rec get_meta = function
+ | SubProof (t, i, _) -> t, i
+ | ProofGoalBlock (_, p) -> get_meta p
+ | _ ->
+ let n = new_meta () in (* CicMkImplicit.new_meta metasenv [] in *)
+ Cic.Meta (n, irl), n
+ in
+ get_meta proof
+ in
+(* let newmeta = CicMkImplicit.new_meta metasenv [] in *)
+ let metasenv = (newmeta, context, term)::metasenv @ metas in
+ ((None, metasenv, Cic.Meta (newmeta, irl), term), newmeta)
+(* ((None, metasenv, proof', term), newmeta) *)
+ in
+ let rec aux = function
+ | [] -> `No (* , [], [] *)
+ | (theorem, thmty, _)::tl ->
+ try
+ let subst, (newproof, newgoals) =
+ PrimitiveTactics.apply_tac_verbose_with_subst ~term:theorem status
+ in
+ if newgoals = [] then
+ let _, _, p, _ = newproof in
+ let newp =
+ let rec repl = function
+ | Inference.ProofGoalBlock (_, gp) ->
+ Inference.ProofGoalBlock (Inference.BasicProof p, gp)
+ | Inference.NoProof -> Inference.BasicProof p
+ | Inference.BasicProof _ -> Inference.BasicProof p
+ | Inference.SubProof (t, i, p2) ->
+ Inference.SubProof (t, i, repl p2)
+ | _ -> assert false
+ in
+ repl proof
+ in
+ let _, m = status in
+ let subst = List.filter (fun (i, _) -> i = m) subst in
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf "m = %d\nsubst = %s\n" *)
+(* m (print_subst subst))); *)
+ `Ok (subst, [newp, metas, term])
+ else
+ let _, menv, p, _ = newproof in
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable context
+ in
+ let goals =
+ List.map
+ (fun i ->
+ let _, _, ty = CicUtil.lookup_meta i menv in
+ let p' =
+ let rec gp = function
+ | SubProof (t, i, p) ->
+ SubProof (t, i, gp p)
+ | ProofGoalBlock (sp1, sp2) ->
+(* SubProof (p, i, sp) *)
+ ProofGoalBlock (sp1, gp sp2)
+(* gp sp *)
+ | BasicProof _
+ | NoProof ->
+ SubProof (p, i, BasicProof (Cic.Meta (i, irl)))
+ | ProofSymBlock (s, sp) ->
+ ProofSymBlock (s, gp sp)
+ | ProofBlock (s, u, nt, t, pe, sp) ->
+ ProofBlock (s, u, nt, t, pe, gp sp)
+(* | _ -> assert false *)
+ in gp proof
+ in
+ debug_print
+ (lazy
+ (Printf.sprintf "new sub goal: %s"
+ (* (string_of_proof p') *)(CicPp.ppterm ty)));
+ (p', menv, ty))
+ newgoals
+ in
+ let goals =
+ let weight t =
+ let w, m = weight_of_term t in
+ w + 2 * (List.length m)
+ in
+ List.sort
+ (fun (_, _, t1) (_, _, t2) ->
+ Pervasives.compare (weight t1) (weight t2))
+ goals
+ in
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf "\nGoOn with subst: %s" (print_subst subst))); *)
+ let best = aux tl in
+ match best with
+ | `Ok (_, _) -> best
+ | `No -> `GoOn ([subst, goals])
+ | `GoOn sl(* , subst', goals' *) ->
+(* if (List.length goals') < (List.length goals) then best *)
+(* else `GoOn, subst, goals *)
+ `GoOn ((subst, goals)::sl)
+ with ProofEngineTypes.Fail msg ->
+ aux tl
+ in
+ let r, s, l =
+ if Inference.term_is_equality term then
+ let rec appleq = function
+ | [] -> false, [], []
+ | (Positive, equality)::tl ->
+ let ok, s, newproof = apply_equality_to_goal env equality goal in
+ if ok then true, s, [newproof, metas, term] else appleq tl
+ | _::tl -> appleq tl
+ in
+ let al, _ = active in
+ appleq al
+ else
+ false, [], []
+ in
+ if r = true then `Ok (s, l) else aux theorems
+;;
+
+
+let apply_to_goal_conj env theorems active (depth, goals) =
+ let rec aux = function
+ | goal::tl ->
+ let propagate_subst subst (proof, metas, term) =
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf "\npropagate_subst:\n%s\n%s, %s\n" *)
+(* (print_subst subst) (string_of_proof proof) *)
+(* (CicPp.ppterm term))); *)
+ let rec repl = function
+ | NoProof -> NoProof
+ | BasicProof t ->
+ BasicProof (CicMetaSubst.apply_subst subst t)
+ | ProofGoalBlock (p, pb) ->
+(* debug_print (lazy "HERE"); *)
+ let pb' = repl pb in
+ ProofGoalBlock (p, pb')
+ | SubProof (t, i, p) ->
+ let t' = CicMetaSubst.apply_subst subst t in
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf *)
+(* "SubProof %d\nt = %s\nsubst = %s\nt' = %s\n" *)
+(* i (CicPp.ppterm t) (print_subst subst) *)
+(* (CicPp.ppterm t'))); *)
+ let p = repl p in
+ SubProof (t', i, p)
+ | ProofSymBlock (ens, p) -> ProofSymBlock (ens, repl p)
+ | ProofBlock (s, u, nty, t, pe, p) ->
+ ProofBlock (subst @ s, u, nty, t, pe, p)
+ in (repl proof, metas, term)
+ in
+ let r = apply_to_goal env theorems active goal in (
+ match r with
+ | `No -> `No (depth, goals)
+ | `GoOn sl (* (subst, gl) *) ->
+(* let tl = List.map (propagate_subst subst) tl in *)
+(* debug_print (lazy "GO ON!!!"); *)
+ let l =
+ List.map
+ (fun (s, gl) ->
+ (depth+1, gl @ (List.map (propagate_subst s) tl))) sl
+ in
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf "%s\n" *)
+(* (String.concat "; " *)
+(* (List.map *)
+(* (fun (s, gl) -> *)
+(* (Printf.sprintf "[%s]" *)
+(* (String.concat "; " *)
+(* (List.map *)
+(* (fun (p, _, g) -> *)
+(* (Printf.sprintf "<%s, %s>" *)
+(* (string_of_proof p) *)
+(* (CicPp.ppterm g))) gl)))) l)))); *)
+ `GoOn l (* (depth+1, gl @ tl) *)
+ | `Ok (subst, gl) ->
+ if tl = [] then
+(* let _ = *)
+(* let p, _, t = List.hd gl in *)
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf "OK: %s, %s\n" *)
+(* (string_of_proof p) (CicPp.ppterm t))) *)
+(* in *)
+ `Ok (depth, gl)
+ else
+ let p, _, _ = List.hd gl in
+ let subproof =
+ let rec repl = function
+ | SubProof (_, _, p) -> repl p
+ | ProofGoalBlock (p1, p2) ->
+ ProofGoalBlock (repl p1, repl p2)
+ | p -> p
+ in
+ build_proof_term (repl p)
+ in
+ let i =
+ let rec get_meta = function
+ | SubProof (_, i, p) -> max i (get_meta p)
+ | ProofGoalBlock (_, p) -> get_meta p
+ | _ -> -1 (* assert false *)
+ in
+ get_meta p
+ in
+ let subst =
+ let _, (context, _, _) = List.hd subst in
+ [i, (context, subproof, Cic.Implicit None)]
+ in
+ let tl = List.map (propagate_subst subst) tl in
+ `GoOn ([depth+1, tl])
+ )
+ | _ -> assert false
+ in
+ debug_print
+ (lazy
+ (Printf.sprintf "apply_to_goal_conj (%d, [%s])"
+ depth
+ (String.concat "; "
+ (List.map (fun (_, _, t) -> CicPp.ppterm t) goals))));
+ if depth > !maxdepth || (List.length goals) > !maxwidth then (
+ debug_print
+ (lazy (Printf.sprintf "Pruning because depth = %d, width = %d"
+ depth (List.length goals)));
+ `No (depth, goals)
+ ) else
+ aux goals
+;;
+
+
+module OrderedGoals = struct
+ type t = int * (Inference.proof * Cic.metasenv * Cic.term) list
+
+ let compare g1 g2 =
+ let d1, l1 = g1
+ and d2, l2 = g2 in
+ let r = d2 - d1 in
+ if r <> 0 then r
+ else let r = (List.length l1) - (List.length l2) in
+ if r <> 0 then r
+ else
+ let res = ref 0 in
+ let _ =
+ List.exists2
+ (fun (_, _, t1) (_, _, t2) ->
+ let r = Pervasives.compare t1 t2 in
+ if r <> 0 then (
+ res := r;
+ true
+ ) else
+ false) l1 l2
+ in !res
+(* let res = Pervasives.compare g1 g2 in *)
+(* let _ = *)
+(* let print_goals (d, gl) = *)
+(* let gl' = List.map (fun (_, _, t) -> CicPp.ppterm t) gl in *)
+(* Printf.sprintf "%d, [%s]" d (String.concat "; " gl') *)
+(* in *)
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf "comparing g1:%s and g2:%s, res: %d\n" *)
+(* (print_goals g1) (print_goals g2) res)) *)
+(* in *)
+(* res *)
+end
+
+module GoalsSet = Set.Make(OrderedGoals);;
+
+
+exception SearchSpaceOver;;
+
+
+let apply_to_goals env is_passive_empty theorems active goals =
+ debug_print (lazy "\n\n\tapply_to_goals\n\n");
+ let add_to set goals =
+ List.fold_left (fun s g -> GoalsSet.add g s) set goals
+ in
+ let rec aux set = function
+ | [] ->
+ debug_print (lazy "HERE!!!");
+ if is_passive_empty then raise SearchSpaceOver else false, set
+ | goals::tl ->
+ let res = apply_to_goal_conj env theorems active goals in
+ match res with
+ | `Ok newgoals ->
+ let _ =
+ let d, p, t =
+ match newgoals with
+ | (d, (p, _, t)::_) -> d, p, t
+ | _ -> assert false
+ in
+ debug_print
+ (lazy
+ (Printf.sprintf "\nOK!!!!\ndepth: %d\nProof: %s\ngoal: %s\n"
+ d (string_of_proof p) (CicPp.ppterm t)))
+ in
+ true, GoalsSet.singleton newgoals
+ | `GoOn newgoals ->
+(* let print_set set msg = *)
+(* debug_print *)
+(* (lazy *)
+(* (Printf.sprintf "%s:\n%s" msg *)
+(* (String.concat "\n" *)
+(* (GoalsSet.fold *)
+(* (fun (d, gl) l -> *)
+(* let gl' = *)
+(* List.map (fun (_, _, t) -> CicPp.ppterm t) gl *)
+(* in *)
+(* let s = *)
+(* Printf.sprintf "%d, [%s]" d *)
+(* (String.concat "; " gl') *)
+(* in *)
+(* s::l) set [])))) *)
+(* in *)
+
+(* let r, s = *)
+(* try aux set tl with SearchSpaceOver -> false, GoalsSet.empty *)
+(* in *)
+(* if r then *)
+(* r, s *)
+(* else *)
+
+ let set' = add_to set (goals::tl) in
+(* print_set set "SET BEFORE"; *)
+(* let n = GoalsSet.cardinal set in *)
+ let set' = add_to set' newgoals in
+(* print_set set "SET AFTER"; *)
+(* let m = GoalsSet.cardinal set in *)
+(* if n < m then *)
+ false, set'
+(* else *)
+(* let _ = print_set set "SET didn't change" in *)
+(* aux set tl *)
+ | `No newgoals ->
+ aux set tl
+(* let set = add_to set (newgoals::goals::tl) in *)
+(* let res, set = aux set tl in *)
+(* res, set *)
+ in
+ let n = List.length goals in
+ let res, goals = aux (add_to GoalsSet.empty goals) goals in
+ let goals = GoalsSet.elements goals in
+ debug_print (lazy "\n\tapply_to_goals end\n");
+ let m = List.length goals in
+ if m = n && is_passive_empty then
+ raise SearchSpaceOver
+ else
+ res, goals
+;;
+
+
+let apply_goal_to_theorems dbd env theorems active goals =
+(* let theorems, _ = theorems in *)
+ let context_hyp, library_thms = theorems in
+ let thm_uris =
+ List.fold_left
+ (fun s (u, _, _, _) -> UriManager.UriSet.add u s)
+ UriManager.UriSet.empty library_thms
+ in
+ let a_goals, p_goals = goals in
+ let goal = List.hd a_goals in
+ let rec aux = function
+ | [] -> false, (a_goals, p_goals)
+ | theorem::tl ->
+ let res = apply_to_goal_conj env [theorem] active goal in
+ match res with
+ | `Ok newgoals ->
+ true, ([newgoals], [])
+ | `No _ ->
+ aux tl
+(* false, (a_goals, p_goals) *)
+ | `GoOn newgoals ->
+ let res, (ag, pg) = aux tl in
+ if res then
+ res, (ag, pg)
+ else
+ let newgoals =
+ List.filter
+ (fun (d, gl) ->
+ (d <= !maxdepth) && (List.length gl) <= !maxwidth)
+ newgoals in
+ let p_goals = newgoals @ pg in
+ let p_goals =
+ List.stable_sort
+ (fun (d1, l1) (d2, l2) -> (List.length l1) - (List.length l2))
+ p_goals
+ in
+ res, (ag, p_goals)
+ in
+ let theorems =
+(* let ty = *)
+(* match goal with *)
+(* | (_, (_, _, t)::_) -> t *)
+(* | _ -> assert false *)
+(* in *)
+(* if CicUtil.is_meta_closed ty then *)
+(* let _ = *)
+(* debug_print (lazy (Printf.sprintf "META CLOSED: %s" (CicPp.ppterm ty))) *)
+(* in *)
+(* let metasenv, context, ugraph = env in *)
+(* let uris = *)
+(* MetadataConstraints.sigmatch ~dbd (MetadataConstraints.signature_of ty) *)
+(* in *)
+(* let uris = List.sort (fun (i, _) (j, _) -> Pervasives.compare i j) uris in *)
+(* let uris = *)
+(* List.filter *)
+(* (fun u -> UriManager.UriSet.mem u thm_uris) (List.map snd uris) *)
+(* in *)
+(* List.map *)
+(* (fun u -> *)
+(* let t = CicUtil.term_of_uri u in *)
+(* let ty, _ = CicTypeChecker.type_of_aux' metasenv context t ugraph in *)
+(* (t, ty, [])) *)
+(* uris *)
+(* else *)
+ List.map (fun (_, t, ty, m) -> (t, ty, m)) library_thms
+ in
+ aux (context_hyp @ theorems)
+;;
+
+
+let apply_theorem_to_goals env theorems active goals =
+ let a_goals, p_goals = goals in
+ let theorem = List.hd (fst theorems) in
+ let theorems = [theorem] in
+ let rec aux p = function
+ | [] -> false, ([], p)
+ | goal::tl ->
+ let res = apply_to_goal_conj env theorems active goal in
+ match res with
+ | `Ok newgoals -> true, ([newgoals], [])
+ | `No _ -> aux p tl
+ | `GoOn newgoals -> aux (newgoals @ p) tl
+ in
+ let ok, (a, p) = aux p_goals a_goals in
+ if ok then
+ ok, (a, p)
+ else
+ let p_goals =
+ List.stable_sort
+ (fun (d1, l1) (d2, l2) ->
+ let r = d2 - d1 in
+ if r <> 0 then r
+ else let r = (List.length l1) - (List.length l2) in
+ if r <> 0 then r
+ else
+ let res = ref 0 in
+ let _ =
+ List.exists2
+ (fun (_, _, t1) (_, _, t2) ->
+ let r = Pervasives.compare t1 t2 in
+ if r <> 0 then (res := r; true) else false) l1 l2
+ in !res)
+ p
+ in
+ ok, (a_goals, p_goals)
+;;
+
+
+let rec given_clause dbd env goals theorems passive active =
+ let goals = simplify_goals env goals active in
+ let ok, goals = activate_goal goals in
+(* let theorems = simplify_theorems env theorems active in *)
+ if ok then
+ let ok, goals = apply_goal_to_theorems dbd env theorems active goals in
+ if ok then
+ let proof =
+ match (fst goals) with
+ | (_, [proof, _, _])::_ -> Some proof
+ | _ -> assert false
+ in
+ ParamodulationSuccess (proof, env)
+ else
+ given_clause_aux dbd env goals theorems passive active
+ else
+(* let ok', theorems = activate_theorem theorems in *)
+ let ok', theorems = false, theorems in
+ if ok' then
+ let ok, goals = apply_theorem_to_goals env theorems active goals in
+ if ok then
+ let proof =
+ match (fst goals) with
+ | (_, [proof, _, _])::_ -> Some proof
+ | _ -> assert false
+ in
+ ParamodulationSuccess (proof, env)
+ else
+ given_clause_aux dbd env goals theorems passive active
+ else
+ if (passive_is_empty passive) then ParamodulationFailure
+ else given_clause_aux dbd env goals theorems passive active
+
+and given_clause_aux dbd env goals theorems passive active =
+ let time1 = Unix.gettimeofday () in
+
+ let selection_estimate = get_selection_estimate () in
+ let kept = size_of_passive passive in
+ let passive =
+ if !time_limit = 0. || !processed_clauses = 0 then
+ passive
+ else if !elapsed_time > !time_limit then (
+ debug_print (lazy (Printf.sprintf "Time limit (%.2f) reached: %.2f\n"
+ !time_limit !elapsed_time));
+ make_passive [] []
+ ) else if kept > selection_estimate then (
+ debug_print
+ (lazy (Printf.sprintf ("Too many passive equalities: pruning..." ^^
+ "(kept: %d, selection_estimate: %d)\n")
+ kept selection_estimate));
+ prune_passive selection_estimate active passive
+ ) else
+ passive
+ in
+
+ let time2 = Unix.gettimeofday () in
+ passive_maintainance_time := !passive_maintainance_time +. (time2 -. time1);
+
+ kept_clauses := (size_of_passive passive) + (size_of_active active);
+
+(* (\* let goals = simplify_goals env goals active in *\) *)
+(* (\* let theorems = simplify_theorems env theorems active in *\) *)
+(* let is_passive_empty = passive_is_empty passive in *)
+(* try *)
+(* let ok, goals = false, [] in (\* apply_to_goals env is_passive_empty theorems active goals in *\) *)
+(* if ok then *)
+(* let proof = *)
+(* match goals with *)
+(* | (_, [proof, _, _])::_ -> Some proof *)
+(* | _ -> assert false *)
+(* in *)
+(* ParamodulationSuccess (proof, env) *)
+(* else *)