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arXiv 0912.2109cs.LO
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具有死锁检测的计算树逻辑

Computation Tree Logic with Deadlock Detection

Rob van Glabbeek, Bas Luttik, Nikola Trcka

摘要:

研究了在没有下一状态模态的计算树逻辑(CTL-X)中满足相同公式的标号迁移系统的状态等价关系。这个关系是由De Nicola & Vaandrager通过将标记转移系统转化为Kripke结构而得到的,同时解除了对后者的总体性限制。他们将其描述为发散敏感分支互模拟等价。我们发现,这种等价未能成为一个交错并行组合的同余。原因是,CTL-X的非总Kripke结构的拟议应用缺乏表现力,以应付死锁属性是重要的,在并行组合的上下文中。我们提出了一个扩展的CTL-X,或替代治疗的非整体,填补这一空白。等价诱导我们的扩展的特点是分支互模拟等价与明确的分歧,这是,此外,示出的粗同余包含在分歧敏感的分支互模拟等价。

英文摘要:

We study the equivalence relation on states of labelled transition systems of satisfying the same formulas in Computation Tree Logic without the next state modality (CTL-X). This relation is obtained by De Nicola & Vaandrager by translating labelled transition systems to Kripke structures, while lifting the totality restriction on the latter. They characterised it as divergence sensitive branching bisimulation equivalence. We find that this equivalence fails to be a congruence for interleaving parallel composition. The reason is that the proposed application of CTL-X to non-total Kripke structures lacks the expressiveness to cope with deadlock properties that are important in the context of parallel composition. We propose an extension of CTL-X, or an alternative treatment of non-totality, that fills this hiatus. The equivalence induced by our extension is characterised as branching bisimulation equivalence with explicit divergence, which is, moreover, shown to be the coarsest congruence contained in divergence sensitive branching bisimulation equivalence.

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