1 files changed, 75 insertions, 0 deletions
diff --git a/Test/civl/FlanaganQadeer.bpl b/Test/civl/FlanaganQadeer.bpl
new file mode 100644
index 00000000..97df7ce2
--- /dev/null
+++ b/Test/civl/FlanaganQadeer.bpl
@@ -0,0 +1,75 @@
+// RUN: %boogie -noinfer -typeEncoding:m -useArrayTheory "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+type X;
+const nil: X;
+var {:layer 0,1} l: X;
+var {:layer 0,1} x: int;
+
+function {:builtin "MapConst"} MapConstBool(bool) : [X]bool;
+function {:inline} {:linear "tid"} TidCollector(x: X) : [X]bool
+{
+  MapConstBool(false)[x := true]
+}
+
+procedure {:yields} {:layer 1} Allocate() returns ({:linear "tid"} xl: X)
+ensures {:layer 1} xl != nil;
+{
+    yield;
+    call xl := AllocateLow();
+    yield;
+}
+
+procedure {:yields} {:layer 1} main()
+{
+    var {:linear "tid"} tid: X;
+    var val: int;
+
+    yield;
+    while (*) 
+    {
+        call tid := Allocate();
+        havoc val;
+        async call foo(tid, val);
+	yield;
+    }
+    yield;
+}
+procedure {:yields} {:layer 0,1} Lock(tid: X);
+ensures {:atomic} |{A: assume l == nil; l := tid; return true; }|;
+
+procedure {:yields} {:layer 0,1} Unlock();
+ensures {:atomic} |{A: l := nil; return true; }|;
+
+procedure {:yields} {:layer 0,1} Set(val: int);
+ensures {:atomic} |{A: x := val; return true; }|;
+
+procedure {:yields} {:layer 0,1} AllocateLow() returns ({:linear "tid"} xl: X);
+ensures {:atomic} |{ A: assume xl != nil; return true; }|;
+
+procedure {:yields} {:layer 1} foo({:linear_in "tid"} tid': X, val: int)
+requires {:layer 1} tid' != nil;
+{
+    var {:linear "tid"} tid: X;
+    tid := tid';
+
+    yield;
+    call Lock(tid);    
+    call tid := Yield(tid);
+    call Set(val);
+    call tid := Yield(tid);
+    assert {:layer 1} x == val;
+    call tid := Yield(tid);
+    call Unlock();
+    yield;
+}
+
+procedure {:yields} {:layer 1} Yield({:linear_in "tid"} tid': X) returns ({:linear "tid"} tid: X)
+requires {:layer 1} tid' != nil;
+ensures {:layer 1} tid == tid';
+ensures {:layer 1} old(l) == tid ==> old(l) == l && old(x) == x;
+{
+    tid := tid';
+    yield;
+    assert {:layer 1} tid != nil;
+    assert {:layer 1} (old(l) == tid ==> old(l) == l && old(x) == x);
+}
+\ No newline at end of file