From c30eca6661470cc26554ebcdd1514f9f696e3da4 Mon Sep 17 00:00:00 2001
From: Enrico Tassi <enrico.tassi@inria.fr>
Date: Sun, 28 May 2006 16:07:33 +0000
Subject: [PATCH] - fixed a bug in unification (not sure in the right way)

---
 components/tactics/paramodulation/indexing.ml | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/components/tactics/paramodulation/indexing.ml b/components/tactics/paramodulation/indexing.ml
index dd2d0a422..524c06eff 100644
--- a/components/tactics/paramodulation/indexing.ml
+++ b/components/tactics/paramodulation/indexing.ml
@@ -393,8 +393,9 @@ let subsumption_aux use_unification env table target =
         try
           let other = if pos = Utils.Left then r else l in
           let what' = Subst.apply_subst subst what in
+          let other' = Subst.apply_subst subst other in
           let subst', menv', ug' =
-            unif_fun metasenv m context what' other ugraph
+            unif_fun metasenv m context what' other' ugraph
           in
           (match Subst.merge_subst_if_possible subst subst' with
           | None -> ok what tl
@@ -1015,7 +1016,7 @@ let fix_expansion goal posu (t, subst, menv, ug, eq_f) =
 
 (* ginve the old [goal], the side that has not changed [posu] and the 
  * expansion builds a new goal *)
-let build_newgoal context goal posu expansion =
+let build_newgoal context goal posu rule expansion =
   let goalproof,_,_,_,_,_ = open_goal goal in
   let (t,subst,menv,ug,(eq_found,eq_URI)) = fix_expansion goal posu expansion in
   let pos, equality = eq_found in
@@ -1029,7 +1030,7 @@ let build_newgoal context goal posu expansion =
     in
     let bo' = (*apply_subst subst*) t in 
     let name = Cic.Name "x" in
-    let newgoalproofstep = (pos,id,subst,Cic.Lambda (name,ty,bo')) in
+    let newgoalproofstep = (rule,pos,id,subst,Cic.Lambda (name,ty,bo')) in
     bo, (newgoalproofstep::goalproof)
   in
   let newmetasenv = (* Inference.filter subst *) menv in
@@ -1051,7 +1052,7 @@ let superposition_left (metasenv, context, ugraph) table goal =
     match c with Utils.Gt -> l,r,Utils.Right | _ -> r,l,Utils.Left
   in
   let expansions, _ = betaexpand_term menv context ugraph table 0 big in
-  List.map (build_newgoal context goal possmall) expansions
+  List.map (build_newgoal context goal possmall Equality.SuperpositionLeft) expansions
 ;;
 
 (** demodulation, when the target is a goal *)
@@ -1063,7 +1064,9 @@ let rec demodulation_goal env table goal =
       let resright = demodulation_aux menv context ugraph table 0 right in
       match resright with
       | Some t ->
-          let newg = build_newgoal context goal Utils.Left t in
+          let newg = 
+            build_newgoal context goal Utils.Left Equality.Demodulation t 
+          in
           if goal_metaconvertibility_eq goal newg then
             false, goal
           else
@@ -1073,7 +1076,7 @@ let rec demodulation_goal env table goal =
   let resleft = demodulation_aux menv context ugraph table 0 left in
   match resleft with
   | Some t ->
-      let newg = build_newgoal context goal Utils.Right t in
+      let newg = build_newgoal context goal Utils.Right Equality.Demodulation t in
       if goal_metaconvertibility_eq goal newg then
         do_right ()
       else
-- 
2.39.2