Complete finite prefixes of symbolic unfoldings of safe time petri nets

  • Authors:
  • Thomas Chatain;Claude Jard

  • Affiliations:
  • IRISA/INRIA, Rennes, France;IRISA/ENS Cachan-Bretagne, Bruz, France

  • Venue:
  • ICATPN'06 Proceedings of the 27th international conference on Applications and Theory of Petri Nets and Other Models of Concurrency
  • Year:
  • 2006

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Abstract

Time Petri nets have proved their interest in modeling real-time concurrent systems. Their usual semantics is defined in term of firing sequences, which can be coded in a (symbolic and global) state graph, computable from a bounded net. An alternative is to consider a “partial order” semantics given in term of processes, which keep explicit the notions of causality and concurrency without computing arbitrary interleavings. In ordinary place/transition bounded nets, it has been shown for many years that the whole set of processes can be finitely represented by a prefix of what is called the “unfolding”. This paper defines such a prefix for safe time Petri nets. It is based on a symbolic unfolding of the net, using a notion of “partial state”.