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| HAL : hal-00350488, version 1 |
| DOI : 10.1007/10722167_35 |
| Fiche détaillée |  Récupérer au format |
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| 12th International Conference on Computer Aided Verification (CAV'2000), Chicago : États-Unis (2000) |
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| Are Timed Automata Updatable ? |
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| Patricia Bouyer 1Catherine Dufourd 2 |
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| (2000) |
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| In classical timed automata, as dened by Alur and Dill [AD90,AD94] and since widely studied, the only operation allowed to modify the clocks is the reset operation. For instance, a clock can neither be set to a non-null constant value, nor be set to the value of another clock nor, in a non-deterministic way, to some value lower or higher than a given constant. In this paper we study in details such updates. We characterize in a thin way the frontier between decidability and undecidability. Our main contributions are the following:- We exhibit many classes of updates for which emptiness is undecidable. These classes depend on the clock constraints that are used diagonal-free or not whereas it is well known that these two kinds of constraints are equivalent for classical timed automata.- We propose a generalization of the region automaton proposed by Alur and Dill, allowing to handle larger classes of updates. The complexity of the decision procedure remains Pspace-complete. |
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| 1 : | Laboratoire Spécification et Vérification [Cachan] (LSV) |
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CNRS : UMR8643 – INRIA – École normale supérieure de Cachan - ENS Cachan |
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| 2 : | EDF R&D |
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EDF |
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| 3 : | Laboratoire Bordelais de Recherche en Informatique (LaBRI) |
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CNRS : UMR5800 – Université Sciences et Technologies - Bordeaux I – École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB) – Université Victor Segalen - Bordeaux II |
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| Domaine | : | Informatique/Autre |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00350488, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00350488 | |
| oai:hal.archives-ouvertes.fr:hal-00350488 | |
| Contributeur : Emmanuel Fleury | |
| Soumis le : Mardi 6 Janvier 2009, 19:13:36 | |
| Dernière modification le : Dimanche 11 Janvier 2009, 15:24:51 | |
