Non-atomic refinement in z and CSP

  • Authors:
  • John Derrick;Heike Wehrheim

  • Affiliations:
  • Department of Computing, University of Sheffield, Sheffield, UK;Institut für Informatik, Universität Paderborn, Paderborn, Germany

  • Venue:
  • ZB'05 Proceedings of the 4th international conference on Formal Specification and Development in Z and B
  • Year:
  • 2005

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Abstract

In this paper we discuss the relationship between notions of non-atomic (or action) refinement in a state-based setting with that in a behavioural setting. In particular, we show that the definition of non-atomic coupled downward simulation as defined for Z and Object-Z is sound with respect to an action refinement definition of CSP failures refinement.