Reducing Quasi-Equal Clocks in Networks of Timed Automata

  • Christian Herrera
  • Bernd Westphal
  • Sergio Feo-Arenis
  • Marco Muñiz
  • Andreas Podelski
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7595)

Abstract

We introduce the novel notion of quasi-equal clocks and use it to improve the verification time of networks of timed automata. Intuitively, two clocks are quasi-equal if, during each run of the system, they have the same valuation except for those points in time where they are reset. We propose a transformation that takes a network of timed automata and yields a network of timed automata which has a smaller set of clocks and preserves properties up to those not comparing quasi-equal clocks. Our experiments demonstrate that the verification time in three transformed real world examples is much lower compared to the original.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Christian Herrera
    • 1
  • Bernd Westphal
    • 1
  • Sergio Feo-Arenis
    • 1
  • Marco Muñiz
    • 1
  • Andreas Podelski
    • 1
  1. 1.Albert-Ludwigs-Universität FreiburgFreiburgGermany

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