X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Forderings.ml;h=f7062b3abebbe2b4d95956ec6f024fd4b46dcb07;hb=HEAD;hp=024056ea221d6e2f4ec1c1f4f093716dc19655c2;hpb=509151febaf7817e5b6ac4bd22a3d9ffa1d9a1be;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/orderings.ml b/helm/software/components/ng_paramodulation/orderings.ml
index 024056ea2..f7062b3ab 100644
--- a/helm/software/components/ng_paramodulation/orderings.ml
+++ b/helm/software/components/ng_paramodulation/orderings.ml
@@ -40,7 +40,8 @@ let rec eq_foterm f x y =
     match x, y with
     | Terms.Leaf t1, Terms.Leaf t2 -> f t1 t2
     | Terms.Var i, Terms.Var j -> i = j
-    | Terms.Node l1, Terms.Node l2 -> List.for_all2 (eq_foterm f) l1 l2
+    | Terms.Node l1, Terms.Node l2 when List.length l1 = List.length l2 -> 
+        List.for_all2 (eq_foterm f) l1 l2
     | _ -> false
 ;;
   
@@ -416,7 +417,8 @@ module LPO (B : Terms.Blob) = struct
                         if List.for_all (fun x -> lpo x t = XLT) tl1 then XLT
                       else XINCOMPARABLE
                     | o -> o)   
-                      with Invalid_argument _ -> assert false)
+                      with Invalid_argument _ -> (* assert false *)
+                              XINCOMPARABLE)
               | XINCOMPARABLE -> XINCOMPARABLE
               | _ -> assert false
           end