1 files changed, 24 insertions, 0 deletions
diff --git a/Test/aitest9/TestIntervals.bpl b/Test/aitest9/TestIntervals.bpl
new file mode 100644
index 00000000..b989e16c
--- /dev/null
+++ b/Test/aitest9/TestIntervals.bpl
@@ -0,0 +1,24 @@
+procedure P()
+{
+  var a: int, b: int, c: int;
+
+  a := 0;
+  while (*) {
+    a := a + 1;
+  }
+  // a in [0, infty]
+
+  b := 0;
+  if (*) { b := b + 1; }
+  if (*) { b := b + 1; }
+  if (*) { b := b + 1; }
+  // b in [0, 3]
+
+  c := a - b;
+  // c in [-3, infty]
+  goto Next;
+
+  Next:
+  assert -3 <= c;
+  assert c <= 0;  // error (there was once an error in the Intervals which thought this assertion to be true)
+}