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The power of QDDs (extended abstract)

  • Concurrency
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Static Analysis (SAS 1997)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 1302))

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Abstract

Queue-content Decision Diagrams (QDDs) are finite-automaton based data structures for representing (possibly infinite) sets of contents of a finite collection of unbounded FIFO queues. Their intended use is to serve as a symbolic representation of the possible queue contents that can occur in the state space of a protocol modeled by finite-state machines communicating through unbounded queues. This is done with the help of a loop-first search, a state-space exploration technique that attempts whenever possible to compute symbolically the effect of repeatedly executing a loop any number of times, making it possible to analyze protocols with infinite state spaces though without the guarantee of termination. This paper first solves a key problem concerning the use of QDDs in this context: it precisely characterizes when, and shows how, the operations required by a loop-first search can be applied to QDDs. Then, it addresses the problem of exploiting QDDs and loop-first searches to broaden the range of properties that can be checked from simple state reachability to temporal logic. Finally, a sufficient criterion for the termination of a loop-first search using QDDs is given.

“Aspirant” (Research Assistant) for the National Fund for Scientific Research (Belgium). The work of this author was done partly while visiting Bell Laboratories.

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Author information

Authors and Affiliations

  1. Institut Montefiore, B28, Université de Liège, B-4000, Liège Sart-Tilman, Belgium

    Bernard Boigelot, Bernard Willems & Pierre Wolper

  2. Bell Laboratories, Lucent Technologies, 1000 E. Warrenville Road, 60566, Naperville, IL, USA

    Patrice Godefroid

Authors
  1. Bernard Boigelot
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  2. Patrice Godefroid
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  3. Bernard Willems
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  4. Pierre Wolper
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Pascal Van Hentenryck

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© 1997 Springer-Verlag Berlin Heidelberg

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Boigelot, B., Godefroid, P., Willems, B., Wolper, P. (1997). The power of QDDs (extended abstract). In: Van Hentenryck, P. (eds) Static Analysis. SAS 1997. Lecture Notes in Computer Science, vol 1302. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0032741

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  • DOI: https://doi.org/10.1007/BFb0032741

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  • Print ISBN: 978-3-540-63468-3

  • Online ISBN: 978-3-540-69576-9

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