Automatically Proving Up-to Bisimulation

We present a tool for checking bisimilarities between pi-calculus processes with the up-to techniques for bisimulation. These techniques are used to reduce the size of the relation one has to exhibit to prove a bisimulation. Not only is this interesting in terms of space management, but it also increases dramatically the expressive power of our system, by making in some cases the verification of infinite states space processes possible. Based on an algorithm to compute a unique normal form for structural congruence, we develop sound and complete methods to check bisimulation up to injective substitutions on free names, up to restriction and up to parallel composition. We show the usefulness of our results on a prototype implementation