Abstract
Based on a characterisation of process networks in the CSP process algebra, we formalise a set of behavioural restrictions used for local deadlock analysis. Also, we formalise two patterns, originally proposed by Roscoe, which avoid deadlocks in cyclic networks by performing only local analyses on components of the network; our formalisation systematises the behavioural and structural constraints imposed by the patterns. A distinguishing feature of our approach is the use of refinement expressions for capturing notions of pattern conformance, which can be mechanically checked by CSP tools like FDR. Moreover, three examples are introduced to demonstrate the effectiveness of our strategy, including a performance comparison between FDR default deadlock assertion and the verification of local behavioural constraints induced by our approach, also using FDR.
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