Abstract
We investigate a class of parametric timed automata, called lower bound/upper bound (L/U) automata, where each parameter occurs in the timing constraints either as a lower bound or as un upper bound. For such automata, we show that checking if for a parameter valuation (resp., all parameter valuations) there is an infinite accepting run is Pspace-complete. We extend these results by allowing the specification of constraints on parameters as a linear system. We show that the considered decision problems are still Pspace-complete, if the lower bound parameters are not compared to the upper bound parameters in the linear system, and are undecidable in general. Finally, we consider a parametric extension of , and prove that the related satisfiability and model checking (w.r.t. L/U automata) problems are Pspace-complete.
This research was partially supported by the MIUR grant ex-60% 2005-2006 Università di Salerno, and the European Commission via FP6 program under contracts FP6-1596 AEOLUS.
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Bozzelli, L., La Torre, S. (2007). Decision Problems for Lower/Upper Bound Parametric Timed Automata. In: Arge, L., Cachin, C., Jurdziński, T., Tarlecki, A. (eds) Automata, Languages and Programming. ICALP 2007. Lecture Notes in Computer Science, vol 4596. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73420-8_79
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DOI: https://doi.org/10.1007/978-3-540-73420-8_79
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