Robust model-checking of linear-time properties in timed automata

  • Authors:
  • Patricia Bouyer;Nicolas Markey;Pierre-Alain Reynier

  • Affiliations:
  • Lab. Spécification & Vérification, CNRS & ENS de Cachan, France;Lab. Spécification & Vérification, CNRS & ENS de Cachan, France;Lab. Spécification & Vérification, CNRS & ENS de Cachan, France

  • Venue:
  • LATIN'06 Proceedings of the 7th Latin American conference on Theoretical Informatics
  • Year:
  • 2006

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Abstract

Formal verification of timed systems is well understood, but their implementation is still challenging. Raskin et al. have recently brought out a model of parameterized timed automata in which the transitions might be slightly delayed or expedited. This model is used to prove that a timed system is implementable with respect to a safety property, by proving that the parameterized model robustly satisfies the safety property. We extend here the notion of implementability to the broader class of linear-time properties, and provide PSPSACE algorithms for the robust model-checking of Büchi-like and LTL properties. We also show how those algorithms can be adapted in order to verify bounded-response-time properties.