Narval (Narrowing variant-based tool) is a visual system for the exploration of symbolic Maude computations that supports both search space exploration and interactive reachability analysis for Maude programs, thus aiding in the diagnosis, debugging, and correction of such programs.
See in the summary section
Program verification, safety analysis, provable security. Protocol crypto-analysis. Automated analysis, modeling, verification, synthesis, learning, debugging and optimization of complex systems and models