Concavely-Priced Timed Automata

(Extended Abstract)
  • Marcin Jurdziński
  • Ashutosh Trivedi
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5215)


Concavely-priced timed automata, a generalization of linearly-priced timed automata, are introduced. Computing the minimum value of a number of cost functions—including reachability price, discounted price, average time, average price, price-per-time average, and price-per-reward average—is considered in a uniform fashion for concavely-priced timed automata. All the corresponding decision problems are shown to be PSPACE-complete. This paper generalises the recent work of Bouyer et al. on deciding the minimum reachability price and the minimum ratio-price for linearly-priced timed automata.

A new type of a region graph—the boundary region graph—is defined, which generalizes the corner-point abstraction of Bouyer et al. A broad class of cost functions—concave-regular cost functions—is introduced, and the boundary region graph is shown to be a correct abstraction for deciding the minimum value of concave-regular cost functions for concavely-priced timed automata.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Marcin Jurdziński
    • 1
  • Ashutosh Trivedi
    • 1
  1. 1.Department of Computer ScienceUniversity of WarwickUK

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