severe bug found in parallel zeta

[helm.git] / matitaB / components / ng_paramodulation / nCicBlob.ml

diff --git a/matitaB/components/ng_paramodulation/nCicBlob.ml b/matitaB/components/ng_paramodulation/nCicBlob.ml
index beef0ae453ba6ce55a80b1bd411b3603effb7630..59d57a854806aafe016d8a0ab8c56bebd09b1889 100644 (file)
--- a/matitaB/components/ng_paramodulation/nCicBlob.ml
+++ b/matitaB/components/ng_paramodulation/nCicBlob.ml
@@ -11,15 +11,15 @@
 
 (* $Id: terms.mli 9822 2009-06-03 15:37:06Z tassi $ *)
 
-let eqPref = ref (fun _ -> assert false);;
-let set_eqP t = eqPref := fun _ -> t;;
-
-let default_eqP() =
+let default_eqP =
   let uri = NUri.uri_of_string "cic:/matita/basics/logic/eq.ind" in
   let ref = NReference.reference_of_spec uri (NReference.Ind(true,0,2)) in
     NCic.Const ref
 ;;
 
+let eqPref = ref default_eqP;;
+let set_eqP t = eqPref := t;;
+
 let equivalence_relation =
   let uri = NUri.uri_of_string "cic:/matita/ng/properties/relations/eq_rel.con"
   in
@@ -84,20 +84,36 @@ with type t = NCic.term and type input = NCic.term = struct
        
   ;;
   
-  let compare x y = 
+  let rec alpha_norm k = function
+    | NCic.Lambda (_,ty,t) -> 
+        NCic.Lambda("_",alpha_norm k ty,alpha_norm k t)
+    | NCic.Prod (_,ty,t) -> 
+        NCic.Prod("_",alpha_norm k ty,alpha_norm k t)
+    | NCic.LetIn (_,ty,t,b) -> 
+        NCic.LetIn("_",alpha_norm k ty,alpha_norm k t,alpha_norm k b)
+    | NCic.Meta (_,(_,NCic.Irl _)) as t -> t
+    | NCic.Meta (n,(s,NCic.Ctx tl)) as t -> 
+        let tl' = HExtlib.sharing_map (alpha_norm k) tl in
+        if tl == tl' then t else NCic.Meta (n,(s,NCic.Ctx tl'))
+    | t -> NCicUtils.map ~hbr:false (new NCicPp.status None)
+        (fun _ _ -> ()) () alpha_norm t
+
+  (* let compare x y = 
     (* CSC: NCicPp.status is the best I can put here *)
     (* WR: and I can't guess a user id, so I must put None *)
     if NCicReduction.alpha_eq (new NCicPp.status None) [] [] [] x y  then 0 
     (* if x = y  then 0 *)
     else compare x y
-  ;;
+  ;; *)
 
-  let eqP = (!eqPref)()
+  let eqP = fun () -> !eqPref
   ;;
 
   let is_eq = function
-    | Terms.Node [ Terms.Leaf eqt ; ty; l; r ] when eq eqP eqt ->
+    | Terms.Node [ Terms.Leaf eqt ; ty; l; r ] when eq (eqP()) eqt ->
         Some (ty,l,r) 
+    | Terms.Node [ Terms.Leaf eqt ; ty; l; r ] ->
+        None
 (*
     | Terms.Node [ Terms.Leaf eqt ; _; Terms.Node [Terms.Leaf eqt2 ; ty]; l; r]
        when eq equivalence_relation eqt && eq setoid_eq eqt2 ->
@@ -120,7 +136,7 @@ with type t = NCic.term and type input = NCic.term = struct
        let res,vars = List.fold_left
          (fun (r,v) t -> let r1,v1 = embed t in (r1::r),aux [] v v1) ([],[]) l
        in (Terms.Node (List.rev res)), vars
-    | t -> Terms.Leaf t, []
+    | t -> Terms.Leaf (alpha_norm () t), []
   ;;
 
   let embed t = fst (embed t) ;;