School of Computing

Jul 8
15:00 - 16:00
PLAS: Julien Lange
PLAS Group Seminar
Verifying Asynchronous Interactions via Communicating Session Automata

This paper proposes a sound procedure to verify properties of communicating session automata (CSA), i.e., communicating automata that include multiparty session types. We introduce a new asynchronous compatibility property for CSA, called k-multiparty compatibility (k-MC), which is a strict superset of the synchronous multiparty compatibility used in theories and tools based on session types. It is decomposed into two bounded properties: (i) a condition called k-safety which guarantees that, within the bound, all sent messages can be received and each automaton can make a move; and (ii) a condition called k-exhaustivity which guarantees that all k-reachable send actions can be fired within the bound. We show that k-exhaustivity implies existential boundedness, and soundly and completely characterises systems where each automaton behaves equivalently under bounds greater than or equal to k. We show that checking k-MC is PSPACE-complete, and demonstrate its performance empirically over large systems using partial order reduction.Draft


Cornwallis South West,
University of Kent,
United Kingdom


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School of Computing

School of Computing, University of Kent, Canterbury, Kent, CT2 7NF

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Last Updated: 14/08/2015