ACM Transactions on Programming Languages and Systems (TOPLAS)
Extending automated compositional verification to the full class of omega-regular languages
TACAS'08/ETAPS'08 Proceedings of the Theory and practice of software, 14th international conference on Tools and algorithms for the construction and analysis of systems
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We propose a classification of temporal properties into a hierarchy which refines the known safety-liveness classification of properties. The new classification recognizes the classes of safety, guarantee, persistence, fairness, and hyper-fairness. The classification suggested here is based on the different ways a property of finite computations can be extended into a property of infinite computations. For properties that are expressible by temporal logic and predicate automata, we provide a syntactic characterization of the formulae and automata that specify properties in the different classes. We consider the verification of properties over a given program, and provide a unique proof principle for each class.