Abstract
We propose a new method for computing the language intersection of two Time Petri nets (TPN); that is the sequence of labels in timed traces common to the execution of two TPN. Our approach is based on a new product construction between nets and relies on the State Class construction, a widely used method for checking the behaviour of TPN. We prove that this new construct does not add additional expressive power, and yet that it can leads to very concise representation of the result. We have implemented our approach in a new tool, called Twina. We report on some experimental results obtained with this tool and show how to apply our approach on two interesting problems: first, to define an equivalent of the twin-plant diagnosability methods for TPN; then as a way to check timed properties without interfering with a system.
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Notes
- 1.
We may assume that there is a countable set of all possible transitions (identifiers) and that different nets have distinct transitions.
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Acknowledgments
The authors are grateful to Thomas Hujsa and Pierre-Emmanuel Hladik for their valuable comments. We also want to thank Bernard Berthomieu, without whom none of this would have been possible; our work is a tribute to the versatility and the enduring qualities of the state class construction that he pioneered more than 30 years ago.
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Lubat, É., Dal Zilio, S., Le Botlan, D., Pencolé, Y., Subias, A. (2019). A State Class Construction for Computing the Intersection of Time Petri Nets Languages. In: André, É., Stoelinga, M. (eds) Formal Modeling and Analysis of Timed Systems. FORMATS 2019. Lecture Notes in Computer Science(), vol 11750. Springer, Cham. https://doi.org/10.1007/978-3-030-29662-9_5
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