A symmetry reduction technique for model checking temporal-epistemic logic

  • Authors:
  • Mika Cohen;Mads Dam;Alessio Lomuscio;Hongyang Qu

  • Affiliations:
  • Department of Computing, Imperial College London, UK;Access Linnaeus Center, Royal Institute of Technology, Sweden;Department of Computing, Imperial College London, UK;Department of Computing, Imperial College London, UK

  • Venue:
  • IJCAI'09 Proceedings of the 21st international jont conference on Artifical intelligence
  • Year:
  • 2009

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Abstract

We introduce a symmetry reduction technique for model checking temporal-epistemic properties of multi-agent systems defined in the mainstream interpreted systems framework. The technique, based on counterpart semantics, aims to reduce the set of initial states that need to be considered in a model. We present theoretical results establishing that there are neither false positives nor false negatives in the reduced model. We evaluate the technique by presenting the results of an implementation tested against two well known applications of epistemic logic, the muddy children and the dining cryptographers. The experimental results obtained confirm that the reduction in model checking time can be dramatic, thereby allowing for the verification of hitherto intractable systems.