X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Flambda-delta%2Fsrc%2Fbasic_rg%2FbrgReduction.ml;fp=helm%2Fsoftware%2Flambda-delta%2Fsrc%2Fbasic_rg%2FbrgReduction.ml;h=5f73a4fc0e3901c1fc7037612cef1c30fc07efe0;hb=d145ea48ed0bdb9642ced01283231f3f13d476b8;hp=79ffcb32f6b60160dfc24cdce1799a035986a861;hpb=e7f64fe2cc67f3514131c8831f87311ff600d005;p=helm.git

diff --git a/helm/software/lambda-delta/src/basic_rg/brgReduction.ml b/helm/software/lambda-delta/src/basic_rg/brgReduction.ml
index 79ffcb32f..5f73a4fc0 100644
--- a/helm/software/lambda-delta/src/basic_rg/brgReduction.ml
+++ b/helm/software/lambda-delta/src/basic_rg/brgReduction.ml
@@ -159,12 +159,13 @@ let rec ac_nfs st (m1, r1, u) (m2, r2, t) =
          O.add ~gdelta:1 ();
 	 ac_nfs st (step st m1 v1) (m2, r2, t)             
       | _, B.Bind (a1, (B.Abst (n1, w1) as b1), t1), 
-        _, B.Bind (a2, (B.Abst (n2, w2) as b2), t2)            ->
-	 if n1 = n2 && ac {st with S.si = false} m1 w1 m2 w2 then
+        _, B.Bind (a2, (B.Abst (n2, w2) as b2), t2)
+	 when n1 = n2 || st.S.si                               ->
+	 if ac {st with S.si = false} m1 w1 m2 w2 then
 	    ac st (push m1 a1 b1) t1 (push m2 a2 b2) t2
 	 else false
       | _, B.Sort _, _, B.Bind (a, (B.Abst (n, _) as b), t)
-         when N.is_zero n && st.S.si                           ->
+         when N.is_zero n || st.S.si                           ->
 	 O.add ~si:1 ();
 	 ac st (push m1 a b) u (push m2 a b) t
       | _                                                      -> false