Distributed CTL model-checking and counterexample search

  • Authors:
  • M. C. Boukala;L. Petrucci

  • Affiliations:
  • LSI, Computer Science department, USTHB, Algiers, ALGERIA;LIPN, CNRS UMR 7030, Université Paris XIII, Villetaneuse, FRANCE

  • Venue:
  • VECoS'09 Proceedings of the Third international conference on Verification and Evaluation of Computer and Communication Systems
  • Year:
  • 2009

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Abstract

In this paper, we propose a distributed algorithm for CTL model-checking and a counterexample search whenever the CTL formula is not satisfied. The distributed approach is used in order to cope with the state space explosion problem. A cluster of workstations performs collaborative verification over a partitioned state space. Thus, every process involved in the distributed verification executes a labelling procedure on its own partial state space, and uses the parse tree of the CTL formula to evaluate sub-formulas and delay the synchronisations so as to minimise idle time. A counterexample search consists in a distributed construction of the treelike corresponding to the failure executions. Some experiments have been carried out to evaluate the efficiency of this approach.