Symbolic Representation of Upward-Closed Sets

  • Authors:
  • Giorgio Delzanno;Jean-François Raskin

  • Affiliations:
  • -;-

  • Venue:
  • TACAS '00 Proceedings of the 6th International Conference on Tools and Algorithms for Construction and Analysis of Systems: Held as Part of the European Joint Conferences on the Theory and Practice of Software, ETAPS 2000
  • Year:
  • 2000

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Abstract

The control state reachability problem is decidable for well-structured infinite-state systems like unbounded Petri Nets, Vector Addition Systems, Lossy Petri Nets, and Broadcast Protocols. An abstract algorithm that solves the problem is given in [AČJT96,FS99]. The algorithm computes the closure of the predecessor operator w.r.t. a given upward-closed set of target states. When applied to this class of verification problems, traditional (infinite-state) symbolic model checkers suffer from the state explosion problem even for very small examples. We provide BDD-like data structures to represent in a compact way collections of upwards closed sets over numerical domains. This way, we turn the abstract algorithm of [AČJT96,FS99] into a practical method. Preliminary experimental results indicate the potential usefulness of our method.