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Efficient contextual unfolding

César Rodríguez 1 Stefan Schwoon 1 Paolo Baldan 
1 MEXICO - Modeling and Exploitation of Interaction and Concurrency
LSV - Laboratoire Spécification et Vérification [Cachan], Inria Saclay - Ile de France
Abstract : A contextual net is a Petri net extended with read arcs, which allow transitions to check for tokens without consuming them. Contextual nets allow for better modelling of concurrent read access than Petri nets, and their unfoldings can be exponentially more compact than those of a corresponding Petri net. A constructive but abstract procedure for generating those unfoldings was proposed in earlier work; however, no concrete implementation existed. Here, we close this gap providing two concrete methods for computing contextual unfoldings, with a view to efficiency. We report on experiments carried out on a number of benchmarks. These show that not only are contextual unfoldings more compact than Petri net unfoldings, but they can be computed with the same or better efficiency, in particular with respect to the place-replication encoding of contextual nets into Petri nets.
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Submitted on : Tuesday, January 22, 2013 - 5:37:01 PM
Last modification on : Thursday, January 20, 2022 - 4:13:06 PM

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César Rodríguez, Stefan Schwoon, Paolo Baldan. Efficient contextual unfolding. Proceedings of the 22nd International Conference on Concurrency Theory (CONCUR'11), 2011, Aachen, Germany, Germany. pp.342-357, ⟨10.1007/978-3-642-23217-6_23⟩. ⟨hal-00779950⟩



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