Efficient on-the-fly Algorithm for Checking Alternating Timed Simulation

  • Authors:
  • Peter Bulychev;Thomas Chatain;Alexandre David;Kim G. Larsen

  • Affiliations:
  • Lomonosov Moscow State University, Russia;LSV, ENS Cachan, France;CISS, Aalborg University, Denmark;CISS, Aalborg University, Denmark

  • Venue:
  • FORMATS '09 Proceedings of the 7th International Conference on Formal Modeling and Analysis of Timed Systems
  • Year:
  • 2009

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Abstract

In this paper we focus on property-preserving preorders between timed game automata and their application to control of partially observable systems. We define timed weak alternating simulation as a preorder between timed game automata, which preserves controllability. We define the rules of building a symbolic turn-based two-player game such that the existence of a winning strategy is equivalent to the simulation being satisfied. We also propose an on-the-fly algorithm for solving this game. This simulation checking method can be applied to the case of non-alternating or strong simulations as well. We illustrate our algorithm by a case study and report on results.