1 files changed, 36 insertions, 0 deletions
diff --git a/Test/houdini/test1.bpl b/Test/houdini/test1.bpl
new file mode 100644
index 00000000..e6ce06c9
--- /dev/null
+++ b/Test/houdini/test1.bpl
@@ -0,0 +1,36 @@
+var g: bool;
+
+procedure foo() 
+modifies g;
+ensures b0 ==> (!old(g) ==> old(g) == g);
+{
+  call AcquireLock();
+  call ReleaseLock();
+}
+
+procedure AcquireLock()
+modifies g;
+ensures b1 ==> old(g) == g;
+{
+  g := true;
+}
+
+procedure ReleaseLock()
+modifies g;
+ensures b2 ==> old(g) == g;
+{
+  g := false;
+}
+
+procedure main()
+modifies g;
+{
+  g := false;
+  call foo();
+  assert !g;
+}
+
+const {:existential true} b0: bool;
+const {:existential true} b1: bool;
+const {:existential true } b2: bool;
+