A Data Symmetry Reduction Technique for 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;Oxford University Computing Laboratory, UK

  • Venue:
  • ATVA '09 Proceedings of the 7th International Symposium on Automated Technology for Verification and Analysis
  • Year:
  • 2009

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Abstract

We present a data symmetry reduction approach for model checking temporal-epistemic logic. The technique abstracts the epistemic indistinguishably relation for the knowledge operators, and is shown to preserve temporal-epistemic formulae. We show a method for statically detecting data symmetry in an ISPL program, the input to the temporal-epistemic model checker MCMAS. The experiments we report show an exponential saving in verification time and space while verifying security properties of the NSPK protocol.