X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Findex.ml;h=4db4584a451494caf00bff8166a3a37f96d678dc;hb=94c7a260ca00f045a3ec1b371f19de757f83003b;hp=889e1e7ef14955960fb1b88bbb7d8f40581ecf1c;hpb=2bcf927f58bac034b8758173cdbd16cb7475de36;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/index.ml b/helm/software/components/ng_paramodulation/index.ml
index 889e1e7ef..4db4584a4 100644
--- a/helm/software/components/ng_paramodulation/index.ml
+++ b/helm/software/components/ng_paramodulation/index.ml
@@ -13,6 +13,8 @@
 
 module Index(B : Orderings.Blob) = struct
   module U = FoUtils.Utils(B)
+  module Unif = FoUnif.Founif(B)
+  module Pp = Pp.Pp(B)
 
   module ClauseOT =
     struct 
@@ -78,16 +80,23 @@ module Index(B : Orderings.Blob) = struct
       type data = ClauseSet.elt and 
       type dataset = ClauseSet.t
     = Make(FotermIndexable)(ClauseSet)
-
-  let index_unit_clause t = function
+  
+  let index_unit_clause maxvar t = function
     | (_,Terms.Equation (l,_,_,Terms.Gt),_,_) as c -> 
           DT.index t l (Terms.Left2Right, c)
     | (_,Terms.Equation (_,r,_,Terms.Lt),_,_) as c -> 
           DT.index t r (Terms.Right2Left, c)
-    | (_,Terms.Equation (l,r,_,Terms.Incomparable),_,_) as c ->  
+    | (_,Terms.Equation (l,r,_,Terms.Incomparable),vl,_) as c ->
+(*	if are_invertible maxvar vl l r then
+	  (prerr_endline ("Invertible " ^ (Pp.pp_foterm l) ^ "=" ^
+	     (Pp.pp_foterm r));
+           DT.index t l (Terms.Left2Right, c))
+	   else *)
           DT.index  
            (DT.index t l (Terms.Left2Right, c))
            r (Terms.Right2Left, c)
+    | (_,Terms.Equation (l,r,_,Terms.Invertible),vl,_) as c ->
+	DT.index t l (Terms.Left2Right, c)
     | (_,Terms.Equation (_,r,_,Terms.Eq),_,_)  -> assert false
     | (_,Terms.Predicate p,_,_) as c ->
           DT.index t p (Terms.Nodir, c)