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Liveness in Timed and Untimed Systems

By Rainer Gawlick, Roberto Segala, Jørgen Søgaard-Andersen and Nancy Lynch

Abstract

When proving the correctness of algorithms in distributed systems, one generally considers safety conditions and liveness conditions. The Input/Output (I/O) automaton model and its timed version have been used successfully, but have focused on safety conditions and on a restricted form of liveness called fairness. In this paper we develop a new I/O automaton model, and a new timed I/O automaton model, that permit the verification of general liveness properties on the basis of existing verification techniques. Our models include a notion of environment-freedom which generalizes the idea of receptiveness of other existing formalisms, and enables the use of compositional verification techniques

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Year: 1994
OAI identifier: oai:CiteSeerX.psu:10.1.1.18.4449
Provided by: CiteSeerX
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