CONCUR 2008 - Concurrency Theory: 19th International by Joseph Y. Halpern (auth.), Franck van Breugel, Marsha

By Joseph Y. Halpern (auth.), Franck van Breugel, Marsha Chechik (eds.)

This booklet constitutes the refereed court cases of the nineteenth overseas convention on Concurrency conception, CONCUR 2008, held in Toronto, Canada, August 19-22, 2008.

The 33 revised complete papers offered including 2 device papers have been conscientiously reviewed and chosen from one hundred twenty submissions. the subjects comprise version checking, technique calculi, minimization and equivalence checking, kinds, semantics, chance, bisimulation and simulation, actual time, and formal languages.

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Extra info for CONCUR 2008 - Concurrency Theory: 19th International Conference, CONCUR 2008, Toronto, Canada, August 19-22, 2008. Proceedings

Example text

Thus, if a TM algorithm ensures a correctness property with the universal contention manager, then the TM algorithm is correct for all contention managers. Moreover, if a TM algorithm A satisfies the structural properties, then the pair A, ucm also satisfies the structural properties [4]. Thus, verifying the correctness of the TM algorithm with ucm for two threads and two variables proves the correctness of the TM algorithm for arbitrary number of threads and variables for all possible contention managers.

A word s0 . . sm is a run of the transition system if there exist states q0 . . qm+1 in Q such that q0 = qinit and for all i such that 0 ≤ i ≤ m, we have (qi , si , qi+1 ) ∈ δ. The language L of a transition system is the set of all runs of the transition system. A TM specification Σ for a correctness property π is a transition system such that L(Σ) = π. A TM specification is deterministic if it is a deterministic transition system. Strict serializability and opacity have been formally defined so far using nondeterministic TM specifications [4].

We say that L is prefix-closed if Pref(L) = L. 38 R. Morin Fig. 1. Process i of Peterson’s protocol Fig. 2. A sample scenario 1 A General Model for Communicating Systems Throughout the paper we fix some (possibly infinite) alphabet Σ. The notion of a shared-memory system we consider is based on a set I of processes together with a distribution Loc : Σ → 2I which assigns to each a ∈ Σ a fixed subset of processes Loc(a) ⊆ I. Intuitively each occurrence of action a induces a synchronized step of all processes from Loc(a).

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