Dafny: Fixed a test that would fail with Z3 4.1.

1 files changed, 3 insertions, 4 deletions

diff --git a/Test/VSI-Benchmarks/b4.dfy b/Test/VSI-Benchmarks/b4.dfy
index 76e1ffa7..d5a56df4 100644
--- a/Test/VSI-Benchmarks/b4.dfy
+++ b/Test/VSI-Benchmarks/b4.dfy
@@ -1,6 +1,5 @@
 /*

-	This test fails with Z3 2.4 (on Win7 x64) and works

-	with Z3 2.9 (on Win7 x64). Other versions ... who knows.

+	This test works with Z3 3.2 and Z3 4.1 (on Win7 x64). Other versions ... who knows.

 */

 

 // Note: We are using the built-in equality to compare keys.

@@ -111,8 +110,6 @@ class Map<Key(==),Value> {
     if (p != null) {

       Keys := Keys[..n] + Keys[n+1..];

       Values := Values[..n] + Values[n+1..];

-      assert Keys[n..] == old(Keys)[n+1..];

-      assert Values[n..] == old(Values)[n+1..];

 

       nodes := nodes[..n] + nodes[n+1..];

       if (prev == null) {

@@ -120,6 +117,8 @@ class Map<Key(==),Value> {
       } else {

         prev.next := p.next;

       }

+      assert Keys[n..] == old(Keys)[n+1..];

+      assert Values[n..] == old(Values)[n+1..];

     }

   }