Symbolic verification of communicating systems with probabilistic message losses: liveness and fairness

  • Authors:
  • C. Baier;N. Bertrand;Ph. Schnoebelen

  • Affiliations:
  • Universität Bonn, Institut für Informatik I, Germany;LSV, ENS de Cachan & CNRS, France;LSV, ENS de Cachan & CNRS, France

  • Venue:
  • FORTE'06 Proceedings of the 26th IFIP WG 6.1 international conference on Formal Techniques for Networked and Distributed Systems
  • Year:
  • 2006

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Abstract

NPLCS’s are a new model for nondeterministic channel systems where unreliable communication is modeled by probabilistic message losses. We show that, for ω-regular linear-time properties and finite-memory schedulers, qualitative model-checking is decidable. The techniques extend smoothly to questions where fairness restrictions are imposed on the schedulers. The symbolic procedure underlying our decidability proofs has been implemented and used to study a simple protocol handling two-way transfers in an unreliable setting.