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Parametric Verification of a Group Membership Algorithm

  • Ahmed Bouajjani
  • Agathe Merceron
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2469)

Abstract

We address the problem of verifying clique avoidance in the TTP protocol. TTP allows several stations embedded in a car to communicate. It has many mechanisms to ensure robustness to faults. In particular, it has an algorithm that allows a station to recognize itself as faulty and leave the communication. This algorithm must satisfy the crucial ’non-clique’ property: it is impossible to have two or more disjoint groups of stations communicating exclusively with stations in their own group. In this paper, we propose an automatic verification method for an arbitrary number of stations N and a given number of faults k. We give a faithful abstraction that allows to model the algorithm by means of unbounded (parametric) counter automata. We have checked the non-clique property on this model in the case of one fault, using the ALV tool as well as the LASH tool.

Keywords

Formal verification fault-tolerant protocols parametric counter automata abstraction 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Ahmed Bouajjani
    • 1
  • Agathe Merceron
    • 1
  1. 1.LiafaUniv. of Paris 7Paris 5France

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