Counterexamples in Probabilistic LTL Model Checking for Markov Chains

  • Authors:
  • Matthias Schmalz;Daniele Varacca;Hagen Völzer

  • Affiliations:
  • ETH Zurich, Switzerland;PPS - CNRS & Univ. Paris Diderot, France;IBM Zurich Research Laboratory, Switzerland

  • Venue:
  • CONCUR 2009 Proceedings of the 20th International Conference on Concurrency Theory
  • Year:
  • 2009

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Abstract

We propose a way of presenting and computing a counterexample in probabilistic LTL model checking for discrete-time Markov chains. In qualitative probabilistic model checking, we present a counterexample as a pair (*** ,*** ), where *** ,*** are finite words such that all paths that extend *** and have infinitely many occurrences of *** violate the specification. In quantitative probabilistic model checking, we present a counterexample as a pair (W ,R ), where W is a set of such finite words *** and R is a set of such finite words *** . Moreover, we suggest how the counterexample presented helps the user identify the underlying error in the system by means of an interactive game with the model checker.