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Counterexample Generation for Markov Chains Using SMT-Based Bounded Model Checking

  • Bettina Braitling
  • Ralf Wimmer
  • Bernd Becker
  • Nils Jansen
  • Erika Ábrahám
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6722)

Abstract

Generation of counterexamples is a highly important task in the model checking process. In contrast to, e.,g., digital circuits where counterexamples typically consist of a single path leading to a critical state of the system, in the probabilistic setting counterexamples may consist of a large number of paths. In order to be able to handle large systems and to use the capabilities of modern SAT-solvers, bounded model checking (BMC) for discrete-time Markov chains was established.

In this paper we introduce the usage of SMT-solving over linear real arithmetic for the BMC procedure. SMT-solving, extending SAT with theories in this context on the one hand leads to a convenient way to express conditions on the probability of certain paths and on the other hand allows to handle Markov reward models. We use the former to find paths with high probability first. This leads to more compact counterexamples. We report on some experiments, which show promising results.

Keywords

Model Check Reward Function Bounded Model Check Quotient System Probabilistic Model Check 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Bettina Braitling
    • 1
  • Ralf Wimmer
    • 1
  • Bernd Becker
    • 1
  • Nils Jansen
    • 2
  • Erika Ábrahám
    • 2
  1. 1.Albert-Ludwigs-University FreiburgGermany
  2. 2.RWTH Aachen UniversityGermany

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