Oeritte: User-Friendly Counterexample Explanation for Model Checking

Thorough verification is a part of the design process instrumentation and control systems if they must comply with crucial safety requirements. Model checking can be applied to formal model such system reason about its correctness based on specification provided. When violation occurs, tool outputs proof in form failure trace, which represents state sequence transitions where requirement does not hold. This sequence, however, even for modular systems, mere table values. Due lack any insights into inner processes structures that caused problem, debugging becomes time effort consuming. The presented this paper, Oeritte, aimed at assisting analyst challenge. It implements method automatic visual counterexample explanation includes reasoning both over falsified LTL formula NuSMV function block diagram system. an industrial-sized nuclear power plant.