+(* Copyright (C) 2005, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
let debug_print = Utils.debug_print;;
let apply_subst = CicMetaSubst.apply_subst
-(* Profiling code
-let apply_subst =
- let profile = CicUtil.profile "apply_subst" in
- (fun s a -> profile.profile (apply_subst s) a)
-;;
-*)
+(* let apply_subst = *)
+(* let profile = CicUtil.profile "apply_subst" in *)
+(* (fun s a -> profile (apply_subst s) a) *)
+(* ;; *)
(*
(* (\* (CicPp.pp termty names) (CicPp.pp ty names))); *\) *)
(* find_matches metasenv context ugraph lift_amount term termty tl *)
(* ) else *)
- let do_match c other eq_URI =
+ let do_match c (* other *) eq_URI =
let subst', metasenv', ugraph' =
let t1 = Unix.gettimeofday () in
try
in
if o <> U.Incomparable then
try
- do_match c other eq_URI
+ do_match c (* other *) eq_URI
with Inference.MatchingFailure ->
find_matches metasenv context ugraph lift_amount term termty tl
else
let res =
- try do_match c other eq_URI
+ try do_match c (* other *) eq_URI
with Inference.MatchingFailure -> None
in
match res with
and other' = (* M. *)apply_subst s other in
let order = cmp c' other' in
let names = U.names_of_context context in
+(* let _ = *)
+(* debug_print *)
+(* (Printf.sprintf "OK matching: %s and %s, order: %s" *)
+(* (CicPp.ppterm c') *)
+(* (CicPp.ppterm other') *)
+(* (Utils.string_of_comparison order)); *)
+(* debug_print *)
+(* (Printf.sprintf "subst:\n%s\n" (Utils.print_subst s)) *)
+(* in *)
if order = U.Gt then
res
else
(* let names = Utils.names_of_context context in *)
(* let termty, ugraph = *)
(* CicTypeChecker.type_of_aux' metasenv context term ugraph *)
+(* in *)
+(* let _ = *)
+(* match term with *)
+(* | C.Meta _ -> assert false *)
+(* | _ -> () *)
(* in *)
function
| [] -> []
(* find_all_matches ~unif_fun metasenv context ugraph *)
(* lift_amount term termty tl *)
(* ) else *)
- let do_match c other eq_URI =
+ let do_match c (* other *) eq_URI =
let subst', metasenv', ugraph' =
let t1 = Unix.gettimeofday () in
try
in
if o <> U.Incomparable then
try
- let res = do_match c other eq_URI in
+ let res = do_match c (* other *) eq_URI in
res::(find_all_matches ~unif_fun metasenv context ugraph
lift_amount term termty tl)
with
lift_amount term termty tl
else
try
- let res = do_match c other eq_URI in
+ let res = do_match c (* other *) eq_URI in
match res with
| _, s, _, _, _ ->
let c' = (* M. *)apply_subst s c
find_all_matches ~unif_fun:Inference.matching
metasenv context ugraph 0 left ty leftc
in
- let ok what (_, subst, menv, ug, ((pos, (_, _, (_, l, r, o), _, _)), _)) =
- try
- let other = if pos = Utils.Left then r else l in
- let subst', menv', ug' =
- let t1 = Unix.gettimeofday () in
+ let rec ok what = function
+ | [] -> false, []
+ | (_, subst, menv, ug, ((pos, (_, _, (_, l, r, o), _, _)), _))::tl ->
try
- let r =
- Inference.matching metasenv context what other ugraph in
- let t2 = Unix.gettimeofday () in
- match_unif_time_ok := !match_unif_time_ok +. (t2 -. t1);
- r
- with Inference.MatchingFailure as e ->
- let t2 = Unix.gettimeofday () in
- match_unif_time_no := !match_unif_time_no +. (t2 -. t1);
- raise e
- in
- samesubst subst subst'
- with Inference.MatchingFailure ->
- false
+ let other = if pos = Utils.Left then r else l in
+ let subst', menv', ug' =
+ let t1 = Unix.gettimeofday () in
+ try
+ let r =
+ Inference.matching metasenv context what other ugraph in
+ let t2 = Unix.gettimeofday () in
+ match_unif_time_ok := !match_unif_time_ok +. (t2 -. t1);
+ r
+ with Inference.MatchingFailure as e ->
+ let t2 = Unix.gettimeofday () in
+ match_unif_time_no := !match_unif_time_no +. (t2 -. t1);
+ raise e
+ in
+ if samesubst subst subst' then
+ true, subst
+ else
+ ok what tl
+ with Inference.MatchingFailure ->
+ ok what tl
in
- let r = List.exists (ok right) leftr in
+ let r, subst = ok right leftr in
if r then
- true
+ true, subst
else
let rightr =
match right with
find_all_matches ~unif_fun:Inference.matching
metasenv context ugraph 0 right ty rightc
in
- List.exists (ok left) rightr
+ ok left rightr
;;
-let rec demodulate_term metasenv context ugraph table lift_amount term =
+let rec demodulation_aux metasenv context ugraph table lift_amount term =
let module C = Cic in
let module S = CicSubstitution in
let module M = CicMetaSubst in
(res, tl @ [S.lift 1 t])
else
let r =
- demodulate_term metasenv context ugraph table
+ demodulation_aux metasenv context ugraph table
lift_amount t
in
match r with
)
| C.Prod (nn, s, t) ->
let r1 =
- demodulate_term metasenv context ugraph table lift_amount s in (
+ demodulation_aux metasenv context ugraph table lift_amount s in (
match r1 with
| None ->
let r2 =
- demodulate_term metasenv
+ demodulation_aux metasenv
((Some (nn, C.Decl s))::context) ugraph
table (lift_amount+1) t
in (
Some (C.Prod (nn, s', (S.lift 1 t)),
subst, menv, ug, eq_found)
)
+ | C.Lambda (nn, s, t) ->
+ let r1 =
+ demodulation_aux metasenv context ugraph table lift_amount s in (
+ match r1 with
+ | None ->
+ let r2 =
+ demodulation_aux metasenv
+ ((Some (nn, C.Decl s))::context) ugraph
+ table (lift_amount+1) t
+ in (
+ match r2 with
+ | None -> None
+ | Some (t', subst, menv, ug, eq_found) ->
+ Some (C.Lambda (nn, (S.lift 1 s), t'),
+ subst, menv, ug, eq_found)
+ )
+ | Some (s', subst, menv, ug, eq_found) ->
+ Some (C.Lambda (nn, s', (S.lift 1 t)),
+ subst, menv, ug, eq_found)
+ )
| t ->
None
;;
let demod_counter = ref 1;;
-let rec demodulation newmeta env table sign target =
+let rec demodulation_equality newmeta env table sign target =
let module C = Cic in
let module S = CicSubstitution in
let module M = CicMetaSubst in
let time1 = Unix.gettimeofday () in
let pos, (_, proof', (ty, what, other, _), menv', args') = eq_found in
+ let ty =
+ try fst (CicTypeChecker.type_of_aux' metasenv context what ugraph)
+ with CicUtil.Meta_not_found _ -> ty
+ in
let what, other = if pos = Utils.Left then what, other else other, what in
let newterm, newproof =
let bo = (* M. *)apply_subst subst (S.subst other t) in
- let t' =
- let name = C.Name ("x_Demod_" ^ (string_of_int !demod_counter)) in
- incr demod_counter;
- let l, r =
- if is_left then t, S.lift 1 right else S.lift 1 left, t in
- (name, ty, S.lift 1 eq_ty, l, r)
+(* let t' = *)
+(* let name = C.Name ("x_Demod_" ^ (string_of_int !demod_counter)) in *)
+(* incr demod_counter; *)
+(* let l, r = *)
+(* if is_left then t, S.lift 1 right else S.lift 1 left, t in *)
+(* (name, ty, S.lift 1 eq_ty, l, r) *)
+(* in *)
+ let name = C.Name ("x_Demod_" ^ (string_of_int !demod_counter)) in
+ incr demod_counter;
+ let bo' =
+ let l, r = if is_left then t, S.lift 1 right else S.lift 1 left, t in
+ C.Appl [C.MutInd (HelmLibraryObjects.Logic.eq_URI, 0, []);
+ S.lift 1 eq_ty; l; r]
in
if sign = Utils.Positive then
(bo,
- Inference.ProofBlock (subst, eq_URI, t', eq_found, proof))
+ Inference.ProofBlock (
+ subst, eq_URI, (name, ty), bo'(* t' *), eq_found, proof))
else
let metaproof =
incr maxmeta;
print_newline ();
C.Meta (!maxmeta, irl)
in
- let target' =
+(* let target' = *)
let eq_found =
let proof' =
let ens =
in
let target_proof =
let pb =
- Inference.ProofBlock (subst, eq_URI, t', eq_found,
- Inference.BasicProof metaproof)
+ Inference.ProofBlock (subst, eq_URI, (name, ty), bo'(* t' *),
+ eq_found, Inference.BasicProof metaproof)
in
match proof with
| Inference.BasicProof _ ->
print_endline "replacing a BasicProof";
pb
- | Inference.ProofGoalBlock (_, parent_eq) ->
+ | Inference.ProofGoalBlock (_, parent_proof(* parent_eq *)) ->
print_endline "replacing another ProofGoalBlock";
- Inference.ProofGoalBlock (pb, parent_eq)
+ Inference.ProofGoalBlock (pb, parent_proof(* parent_eq *))
| _ -> assert false
in
- (0, target_proof, (eq_ty, left, right, order), metas, args)
- in
+(* (0, target_proof, (eq_ty, left, right, order), metas, args) *)
+(* in *)
let refl =
C.Appl [C.MutConstruct (* reflexivity *)
(HelmLibraryObjects.Logic.eq_URI, 0, 1, []);
eq_ty; if is_left then right else left]
in
(bo,
- Inference.ProofGoalBlock (Inference.BasicProof refl, target'))
+ Inference.ProofGoalBlock (Inference.BasicProof refl, target_proof(* target' *)))
in
let left, right = if is_left then newterm, right else left, newterm in
let m = (Inference.metas_of_term left) @ (Inference.metas_of_term right) in
let newmetasenv = List.filter (fun (i, _, _) -> List.mem i m) metas
- and newargs =
- List.filter
- (function C.Meta (i, _) -> List.mem i m | _ -> assert false)
- args
+ and newargs = args
+(* let a = *)
+(* List.filter *)
+(* (function C.Meta (i, _) -> List.mem i m | _ -> assert false) args in *)
+(* let delta = (List.length args) - (List.length a) in *)
+(* if delta > 0 then *)
+(* let first = List.hd a in *)
+(* let rec aux l = function *)
+(* | 0 -> l *)
+(* | d -> let l = aux l (d-1) in l @ [first] *)
+(* in *)
+(* aux a delta *)
+(* else *)
+(* a *)
in
let ordering = !Utils.compare_terms left right in
let w = Utils.compute_equality_weight eq_ty left right in
(w, newproof, (eq_ty, left, right, ordering), newmetasenv, newargs)
in
-(* if sign = Utils.Positive then ( *)
-(* let newm, res = Inference.fix_metas !maxmeta res in *)
-(* maxmeta := newm; *)
-(* !maxmeta, res *)
-(* ) else *)
- !maxmeta(* newmeta *), res
+ !maxmeta, res
in
- let res = demodulate_term metasenv' context ugraph table 0 left in
-(* let build_identity (w, p, (t, l, r, o), m, a) = *)
-(* match o with *)
-(* | Utils.Gt -> (w, p, (t, r, r, Utils.Eq), m, a) *)
-(* | _ -> (w, p, (t, l, l, Utils.Eq), m, a) *)
-(* in *)
+ let res = demodulation_aux metasenv' context ugraph table 0 left in
match res with
| Some t ->
let newmeta, newtarget = build_newtarget true t in
(* if subsumption env table newtarget then *)
(* newmeta, build_identity newtarget *)
(* else *)
- demodulation newmeta env table sign newtarget
+ demodulation_equality newmeta env table sign newtarget
| None ->
- let res = demodulate_term metasenv' context ugraph table 0 right in
+ let res = demodulation_aux metasenv' context ugraph table 0 right in
match res with
| Some t ->
let newmeta, newtarget = build_newtarget false t in
(* if subsumption env table newtarget then *)
(* newmeta, build_identity newtarget *)
(* else *)
- demodulation newmeta env table sign newtarget
+ demodulation_equality newmeta env table sign newtarget
| None ->
newmeta, target
;;
let res, lifted_term =
match term with
| C.Meta (i, l) ->
- let l', lifted_l =
+ let l', lifted_l =
List.fold_right
(fun arg (res, lifted_tl) ->
match arg with
| None ->
(List.map
(fun (r, s, m, ug, eq_found) ->
- None::r, s, m, ug, eq_found) res,
+ None::r, s, m, ug, eq_found) res,
None::lifted_tl)
) l ([], [])
in
- let e =
+ let e =
List.map
(fun (l, s, m, ug, eq_found) ->
(C.Meta (i, l), s, m, ug, eq_found)) l'
C.Prod (nn, lifted_s, t), s, m, ug, eq_found) l2 in
l1' @ l2', C.Prod (nn, lifted_s, lifted_t)
+ | C.Lambda (nn, s, t) ->
+ let l1, lifted_s =
+ betaexpand_term metasenv context ugraph table lift_amount s in
+ let l2, lifted_t =
+ betaexpand_term metasenv ((Some (nn, C.Decl s))::context) ugraph
+ table (lift_amount+1) t in
+ let l1' =
+ List.map
+ (fun (t, s, m, ug, eq_found) ->
+ C.Lambda (nn, t, lifted_t), s, m, ug, eq_found) l1
+ and l2' =
+ List.map
+ (fun (t, s, m, ug, eq_found) ->
+ C.Lambda (nn, lifted_s, t), s, m, ug, eq_found) l2 in
+ l1' @ l2', C.Lambda (nn, lifted_s, lifted_t)
+
| C.Appl l ->
let l', lifted_l =
List.fold_right
| t -> [], (S.lift lift_amount t)
in
match term with
- | C.Meta _ -> res, lifted_term
+ | C.Meta (i, l) -> res, lifted_term
| term ->
let termty, ugraph =
C.Implicit None, ugraph
let what, other = if pos = Utils.Left then what, other else other, what in
let newgoal, newproof =
let bo' = (* M. *)apply_subst s (S.subst other bo) in
- let t' =
- let name = C.Name ("x_SupL_" ^ (string_of_int !sup_l_counter)) in
- incr sup_l_counter;
- let l, r =
- if ordering = U.Gt then bo, S.lift 1 right else S.lift 1 left, bo in
- (name, ty, S.lift 1 eq_ty, l, r)
- in
-(* let bo'' = *)
-(* C.Appl ( *)
-(* [C.MutInd (HL.Logic.eq_URI, 0, []); *)
-(* S.lift 1 eq_ty] @ *)
-(* if ordering = U.Gt then [S.lift 1 bo'; S.lift 1 right] *)
-(* else [S.lift 1 left; S.lift 1 bo']) *)
-(* in *)
(* let t' = *)
(* let name = C.Name ("x_SupL_" ^ (string_of_int !sup_l_counter)) in *)
(* incr sup_l_counter; *)
-(* C.Lambda (name, ty, bo'') *)
+(* let l, r = *)
+(* if ordering = U.Gt then bo, S.lift 1 right else S.lift 1 left, bo in *)
+(* (name, ty, S.lift 1 eq_ty, l, r) *)
(* in *)
+ let name = C.Name ("x_SupL_" ^ (string_of_int !sup_l_counter)) in
+ incr sup_l_counter;
+ let bo'' =
+ let l, r =
+ if ordering = U.Gt then bo, S.lift 1 right else S.lift 1 left, bo in
+ C.Appl [C.MutInd (HL.Logic.eq_URI, 0, []); S.lift 1 eq_ty; l; r]
+ in
incr maxmeta;
let metaproof =
let irl =
CicMkImplicit.identity_relocation_list_for_metavariable context in
C.Meta (!maxmeta, irl)
in
- let target' =
+(* let target' = *)
let eq_found =
let proof' =
let ens =
in
let target_proof =
let pb =
- Inference.ProofBlock (s, eq_URI, t', eq_found,
+ Inference.ProofBlock (s, eq_URI, (name, ty), bo''(* t' *), eq_found,
Inference.BasicProof metaproof)
in
match proof with
| Inference.BasicProof _ ->
print_endline "replacing a BasicProof";
pb
- | Inference.ProofGoalBlock (_, parent_eq) ->
+ | Inference.ProofGoalBlock (_, parent_proof(* parent_eq *)) ->
print_endline "replacing another ProofGoalBlock";
- Inference.ProofGoalBlock (pb, parent_eq)
+ Inference.ProofGoalBlock (pb, parent_proof(* parent_eq *))
| _ -> assert false
in
- (weight, target_proof, (eq_ty, left, right, ordering), [], [])
- in
+(* (weight, target_proof, (eq_ty, left, right, ordering), [], []) *)
+(* in *)
let refl =
C.Appl [C.MutConstruct (* reflexivity *)
(HelmLibraryObjects.Logic.eq_URI, 0, 1, []);
eq_ty; if ordering = U.Gt then right else left]
in
(bo',
- Inference.ProofGoalBlock (Inference.BasicProof refl, target'))
+ Inference.ProofGoalBlock (Inference.BasicProof refl, target_proof(* target' *)))
in
let left, right =
if ordering = U.Gt then newgoal, right else left, newgoal in
if ordering = U.Gt then bo, S.lift 1 right else S.lift 1 left, bo in
(name, ty, S.lift 1 eq_ty, l, r)
in
-(* let bo'' = *)
-(* C.Appl ( *)
-(* [C.MutInd (HL.Logic.eq_URI, 0, []); S.lift 1 eq_ty] @ *)
-(* if ordering = U.Gt then [S.lift 1 bo'; S.lift 1 right] *)
-(* else [S.lift 1 left; S.lift 1 bo']) *)
-(* in *)
-(* let t' = *)
-(* let name = C.Name ("x_SupR_" ^ (string_of_int !sup_r_counter)) in *)
-(* incr sup_r_counter; *)
-(* C.Lambda (name, ty, bo'') *)
-(* in *)
+ let name = C.Name ("x_SupR_" ^ (string_of_int !sup_r_counter)) in
+ incr sup_r_counter;
+ let bo'' =
+ let l, r =
+ if ordering = U.Gt then bo, S.lift 1 right else S.lift 1 left, bo in
+ C.Appl [C.MutInd (HL.Logic.eq_URI, 0, []); S.lift 1 eq_ty; l; r]
+ in
bo',
- Inference.ProofBlock (s, eq_URI, t', eq_found, eqproof(* target *))
-(* (\* M. *\)apply_subst s *)
-(* (C.Appl [C.Const (eq_URI, []); ty; what; t'; *)
-(* eqproof; other; proof']) *)
+ Inference.ProofBlock (
+ s, eq_URI, (name, ty), bo''(* t' *), eq_found, eqproof)
in
let newmeta, newequality =
let left, right =
let neworder = !Utils.compare_terms left right
and newmenv = newmetas @ menv'
and newargs = args @ args' in
+(* let m = *)
+(* (Inference.metas_of_term left) @ (Inference.metas_of_term right) in *)
+(* let a = *)
+(* List.filter *)
+(* (function C.Meta (i, _) -> List.mem i m | _ -> assert false) *)
+(* (args @ args') *)
+(* in *)
+(* let delta = (List.length args) - (List.length a) in *)
+(* if delta > 0 then *)
+(* let first = List.hd a in *)
+(* let rec aux l = function *)
+(* | 0 -> l *)
+(* | d -> let l = aux l (d-1) in l @ [first] *)
+(* in *)
+(* aux a delta *)
+(* else *)
+(* a *)
+(* in *)
let eq' =
let w = Utils.compute_equality_weight eq_ty left right in
(w, newproof, (eq_ty, left, right, neworder), newmenv, newargs)
newequality
in
-
-(* let build_new = *)
-(* let profile = CicUtil.profile "Indexing.superposition_right.build_new" in *)
-(* (fun o e -> profile.profile (build_new o) e) *)
-(* in *)
-
let new1 = List.map (build_new U.Gt) res1
and new2 = List.map (build_new U.Lt) res2 in
- let ok = function
- | _, _, (_, left, right, _), _, _ ->
- not (fst (CR.are_convertible context left right ugraph))
- in
+(* let ok = function *)
+(* | _, _, (_, left, right, _), _, _ -> *)
+(* not (fst (CR.are_convertible context left right ugraph)) *)
+(* in *)
+ let ok e = not (Inference.is_identity (metasenv, context, ugraph) e) in
(!maxmeta,
(List.filter ok (new1 @ new2)))
;;
+
+
+let rec demodulation_goal newmeta env table goal =
+ let module C = Cic in
+ let module S = CicSubstitution in
+ let module M = CicMetaSubst in
+ let module HL = HelmLibraryObjects in
+ let metasenv, context, ugraph = env in
+ let maxmeta = ref newmeta in
+ let proof, metas, term = goal in
+ let metasenv' = metasenv @ metas in
+
+ let build_newgoal (t, subst, menv, ug, (eq_found, eq_URI)) =
+ let pos, (_, proof', (ty, what, other, _), menv', args') = eq_found in
+ let what, other = if pos = Utils.Left then what, other else other, what in
+ let ty =
+ try fst (CicTypeChecker.type_of_aux' metasenv context what ugraph)
+ with CicUtil.Meta_not_found _ -> ty
+ in
+ let newterm, newproof =
+ let bo = (* M. *)apply_subst subst (S.subst other t) in
+ let bo' = apply_subst subst t in
+ let name = C.Name ("x_DemodGoal_" ^ (string_of_int !demod_counter)) in
+ incr demod_counter;
+ let metaproof =
+ incr maxmeta;
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable context in
+ Printf.printf "\nADDING META: %d\n" !maxmeta;
+ print_newline ();
+ C.Meta (!maxmeta, irl)
+ in
+ let eq_found =
+ let proof' =
+ let ens =
+ if pos = Utils.Left then build_ens_for_sym_eq ty what other
+ else build_ens_for_sym_eq ty other what
+ in
+ Inference.ProofSymBlock (ens, proof')
+ in
+ let what, other =
+ if pos = Utils.Left then what, other else other, what
+ in
+ pos, (0, proof', (ty, other, what, Utils.Incomparable), menv', args')
+ in
+ let goal_proof =
+ let pb =
+ Inference.ProofBlock (subst, eq_URI, (name, ty), bo',
+ eq_found, Inference.BasicProof metaproof)
+ in
+ let rec repl = function
+ | Inference.NoProof ->
+ debug_print (lazy "replacing a NoProof");
+ pb
+ | Inference.BasicProof _ ->
+ debug_print (lazy "replacing a BasicProof");
+ pb
+ | Inference.ProofGoalBlock (_, parent_proof) ->
+ debug_print (lazy "replacing another ProofGoalBlock");
+ Inference.ProofGoalBlock (pb, parent_proof)
+ | (Inference.SubProof (term, meta_index, p) as subproof) ->
+ debug_print
+ (lazy
+ (Printf.sprintf "replacing %s"
+ (Inference.string_of_proof subproof)));
+ Inference.SubProof (term, meta_index, repl p)
+ | _ -> assert false
+ in repl proof
+ in
+ bo, Inference.ProofGoalBlock (Inference.NoProof, goal_proof)
+ in
+ let m = Inference.metas_of_term newterm in
+ let newmetasenv = List.filter (fun (i, _, _) -> List.mem i m) metas in
+ !maxmeta, (newproof, newmetasenv, newterm)
+ in
+ let res = demodulation_aux metasenv' context ugraph table 0 term in
+ match res with
+ | Some t ->
+ let newmeta, newgoal = build_newgoal t in
+ let _, _, newg = newgoal in
+ if Inference.meta_convertibility term newg then
+ newmeta, newgoal
+ else
+ demodulation_goal newmeta env table newgoal
+ | None ->
+ newmeta, goal
+;;
+
+
+let rec demodulation_theorem newmeta env table theorem =
+ let module C = Cic in
+ let module S = CicSubstitution in
+ let module M = CicMetaSubst in
+ let module HL = HelmLibraryObjects in
+ let metasenv, context, ugraph = env in
+ let maxmeta = ref newmeta in
+ let proof, metas, term = theorem in
+ let term, termty, metas = theorem in
+ let metasenv' = metasenv @ metas in
+
+ let build_newtheorem (t, subst, menv, ug, (eq_found, eq_URI)) =
+ let pos, (_, proof', (ty, what, other, _), menv', args') = eq_found in
+ let what, other = if pos = Utils.Left then what, other else other, what in
+ let newterm, newty =
+ let bo = apply_subst subst (S.subst other t) in
+ let bo' = apply_subst subst t in
+ let name = C.Name ("x_DemodThm_" ^ (string_of_int !demod_counter)) in
+ incr demod_counter;
+ let newproof =
+ Inference.ProofBlock (subst, eq_URI, (name, ty), bo', eq_found,
+ Inference.BasicProof term)
+ in
+ (Inference.build_proof_term newproof, bo)
+ in
+ let m = Inference.metas_of_term newterm in
+ let newmetasenv = List.filter (fun (i, _, _) -> List.mem i m) metas in
+ !maxmeta, (newterm, newty, newmetasenv)
+ in
+ let res = demodulation_aux metasenv' context ugraph table 0 termty in
+ match res with
+ | Some t ->
+ let newmeta, newthm = build_newtheorem t in
+ let newt, newty, _ = newthm in
+ if Inference.meta_convertibility termty newty then
+ newmeta, newthm
+ else
+ demodulation_theorem newmeta env table newthm
+ | None ->
+ newmeta, theorem
+;;
projects / helm.git / blobdiff