Message Sequence Graphs and Decision Problems on Mazurkiewicz Traces

  • Authors:
  • Anca Muscholl;Doron Peled

  • Affiliations:
  • -;-

  • Venue:
  • MFCS '99 Proceedings of the 24th International Symposium on Mathematical Foundations of Computer Science
  • Year:
  • 1999

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Abstract

Message sequence chEirts (MSC) are a graphical specification language widely used for designing communication protocols. Our starting point are two decision problems concerning the correctness and the consistency of a design based by MSC graphs. Both problems are shown to be undecidable, in general. Using a natural connectivity assumption from Mazurkiewicz trace theory we show both problems to be EXPSPACE-complete for locally synchronized graphs. The results are based on new complexity results for star-connected rational trace languages.