A Conformance Testing Relation for Symbolic Timed Automata

  • Sabrina von Styp
  • Henrik Bohnenkamp
  • Julien Schmaltz
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6246)


We introduce Symbolic Timed Automata, an amalgamation of symbolic transition systems and timed automata, which allows to express nondeterministic data-dependent control flow with inputs and outputs and real-time behaviour. In particular, input data can influence the timing behaviour. We define two semantics for STA, a concrete one as timed labelled transition systems and another one on a symbolic level. We show that the symbolic semantics is complete and correct w.r.t. the concrete one. Finally, we introduce symbolic conformance relation stioco , which is an extension of the well-known ioco conformance relation. Relation stioco is defined using FO-logic on a purely symbolic level. We show that stioco corresponds on the concrete semantic level to Krichen and Tripakis’ implementation relation tioco for timed labelled transition systems.


Real-time conformance testing symbolic execution implementation relation semantics FO logics 


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© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Sabrina von Styp
    • 1
  • Henrik Bohnenkamp
    • 1
  • Julien Schmaltz
    • 2
    • 3
  1. 1.Software Modeling and Verification (i2), Department of Computer ScienceRWTH Aachen UniversityAachenGermany
  2. 2.School of Computer ScienceOpen University of the NetherlandsHeerlenThe Netherlands
  3. 3.Institute for Computing and Information SciencesRadboud University NijmegenThe Netherlands

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