Progress-Preserving Refinements of CTA

Authors Massimo Bartoletti, Laura Bocchi, Maurizio Murgia

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Massimo Bartoletti
  • Università degli Studi di Cagliari, Cagliari, Italy
Laura Bocchi
  • University of Kent, Canterbury, UK
Maurizio Murgia
  • University of Kent, Canterbury, UK

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Massimo Bartoletti, Laura Bocchi, and Maurizio Murgia. Progress-Preserving Refinements of CTA. In 29th International Conference on Concurrency Theory (CONCUR 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 118, pp. 40:1-40:19, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)


We develop a theory of refinement for timed asynchronous systems, in the setting of Communicating Timed Automata (CTA). Our refinement applies point-wise to the components of a system of CTA, and only affecting their time constraints - in this way, we achieve compositionality and decidability. We then establish a decidable condition under which our refinement preserves behavioural properties of systems, such as their global and local progress. Our theory provides guidelines on how to implement timed protocols using the real-time primitives of programming languages. We validate our theory through a series of experiments, supported by an open-source tool which implements our verification techniques.

Subject Classification

ACM Subject Classification
  • Theory of computation → Timed and hybrid models
  • protocol implementation
  • communicating timed automata
  • message passing


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