Failing regression test from diffblue#661

regression/cbmc/cpp1/main.cpp

@@ -0,0 +1,48 @@
+#include <cassert>
+
+template <class T>
+class sc_signal
+{
+public:
+    T data;
+    sc_signal(){}
+    sc_signal(const char *p) {}
+    T read() {return data;}
+    void write(const T &d) {data = d;}
+};
+
+
+struct rbm
+{
+
+   sc_signal<unsigned int>  data_out;   //<L1>
+
+   sc_signal<bool>   done;  // <L2>
+
+   sc_signal<bool> conf_done;
+
+   void config();
+
+   rbm()
+   {
+
+   }
+
+};
+
+
+void rbm::config()
+{
+   do {
+         conf_done.write(true);
+         assert(conf_done.data==true);
+    } while ( !conf_done.read() );
+}
+
+int main()
+{
+    rbm IMPL;
+    IMPL.config();
+
+    return 0;
+}

regression/cbmc/cpp1/test.desc

@@ -0,0 +1,10 @@
+KNOWNBUG
+main.cpp
+
+^EXIT=0$
+^SIGNAL=0$
+^VERIFICATION SUCCESSFUL$
+--
+^warning: ignoring
+--
+This has been reported as #661.