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@inproceedings{1316355,
author = {Beneš, Nikola and Bezděk, Peter and Larsen, Kim G. and Srba, Jiří},
address = {Neuveden},
booktitle = {Automata, Languages, and Programming},
doi = {http://dx.doi.org/10.1007/978-3-662-47666-6_6},
editor = {Magnús M. Halldórsson, Kazuo Iwama, Naoki Kobayashi, Bettina Speckmann},
keywords = {Parametric Timed Automata; Decidability; Language Emptiness},
howpublished = {tištěná verze "print"},
language = {eng},
location = {Neuveden},
isbn = {978-3-662-47665-9},
pages = {69-81},
publisher = {Springer Berlin Heidelberg},
title = {Language Emptiness of Continuous-Time Parametric Timed Automata},
year = {2015}
}
TY - JOUR
ID - 1316355
AU - Beneš, Nikola - Bezděk, Peter - Larsen, Kim G. - Srba, Jiří
PY - 2015
TI - Language Emptiness of Continuous-Time Parametric Timed Automata
PB - Springer Berlin Heidelberg
CY - Neuveden
SN - 9783662476659
KW - Parametric Timed Automata
KW - Decidability
KW - Language Emptiness
N2 - Parametric timed automata extend the standard timed automata with the possibility to use parameters in the clock guards. In general, if the parameters are real-valued, the problem of language emptiness of such automata is undecidable even for various restricted subclasses. We thus focus on the case where parameters are assumed to be integer-valued, while the time still remains continuous. On the one hand, we show that the problem remains undecidable for parametric timed automata with three clocks and one parameter. On the other hand, for the case with arbitrary many clocks where only one of these clocks is compared with (an arbitrary number of) parameters, we show that the parametric language emptiness is decidable. The undecidability result tightens the bounds of a previous result which assumed six parameters, while the decidability result extends the existing approaches that deal with discrete-time semantics only. To the best of our knowledge, this is the first positive result in the case of continuous-time and unbounded integer parameters, except for the rather simple case of single-clock automata.
ER -
BENEŠ, Nikola, Peter BEZDĚK, Kim G. LARSEN and Jiří SRBA. Language Emptiness of Continuous-Time Parametric Timed Automata. In Magnús M. Halldórsson, Kazuo Iwama, Naoki Kobayashi, Bettina Speckmann. \textit{Automata, Languages, and Programming}. Neuveden: Springer Berlin Heidelberg, 2015, p.~69-81. ISBN~978-3-662-47665-9. Available from: https://dx.doi.org/10.1007/978-3-662-47666-6\_{}6.
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