Optimal infinite scheduling for multi-priced timed automata

  • Authors:
  • Patricia Bouyer;Ed Brinksma;Kim G. Larsen

  • Affiliations:
  • LSV, CNRS & ENS de Cachan, Cachan Cedex, France;Department of Computer Science, University of Twente, Enschede, The Netherlands;BRICS, Aalborg University, Aalborg, Denmark

  • Venue:
  • Formal Methods in System Design
  • Year:
  • 2008

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Abstract

This paper is concerned with the derivation of infinite schedules for timed automata that are in some sense optimal. To cover a wide class of optimality criteria we start out by introducing an extension of the (priced) timed automata model that includes both costs and rewards as separate modelling features. A precise definition is then given of what constitutes optimal infinite behaviours for this class of models. We subsequently show that the derivation of optimal non-terminating schedules for such double-priced timed automata is computable. This is done by a reduction of the problem to the determination of optimal mean-cycles in finite graphs with weighted edges. This reduction is obtained by introducing the so-called corner-point abstraction, a powerful abstraction technique of which we show that it preserves optimal schedules.