Date: 14 Mar 2002

Reachability Analysis of Hybrid Systems via Predicate Abstraction

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Predicate abstraction has emerged to be a powerful technique for extracting finite-state models from infinite-state discrete programs. Th is paper presents algorithms and tools for reachability analysis of hybrid systems by combining the notion of predicate abstraction with recent techniques for approximating the set of reachable states of linear systems using polyhedra.Giv en a hybrid system and a set of userde fined boolean predicates, we consider the finite discrete quotient whose states correspond to all possible truth assignments to the input predicates. T he tool performs an on-the-fly exploration of the abstract system. We demonstrate the feasibility of the proposed technique by analyzing a parametric timing-based mutual exclusion protocol and safety of a simple controller for vehicle coordination.