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arXiv 2010.03311cs.LOcs.CC
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具有团队语义的线性时间时态逻辑:表达性和复杂性

Linear-time Temporal Logic with Team Semantics: Expressivity and Complexity

Jonni Virtema, Jana Hofmann, Bernd Finkbeiner, Juha Kontinen, Fan Yang

摘要:

研究了具有团队语义的模型检验线性时态逻辑(TeamLTL)的表达性和复杂性。TeamLTL,尽管是一个纯粹的模态逻辑,但能够定义超属性,即,与多个执行跟踪相关的属性。TeamLTL最近才被引入,关于它的表达能力和模型检验问题,只有很少的结果是已知的。我们将TeamLTL的表达性与通过用迹和命题量词(HyperLTL和HyperQPTL)扩展LTL获得的超性质的逻辑联系起来。通过这样做,我们得到了一些模型检验的TeamLTL结果,并确定其不可判定性边界。特别是,我们证明了任何向下封闭的TeamLTL扩展的所谓的左平坦片段的模型检验的可判定性。此外,我们建立了具有布尔析取和包含原子的TeamLTL的模型检验问题是不可判定的。

英文摘要:

We study the expressivity and complexity of model checking linear temporal logic with team semantics (TeamLTL). TeamLTL, despite being a purely modal logic, is capable of defining hyperproperties, i.e., properties which relate multiple execution traces. TeamLTL has been introduced quite recently and only few results are known regarding its expressivity and its model checking problem. We relate the expressivity of TeamLTL to logics for hyperproperties obtained by extending LTL with trace and propositional quantifiers (HyperLTL and HyperQPTL). By doing so, we obtain a number of model checking results for TeamLTL and identify its undecidability frontier. In particular, we show decidability of model checking of the so-called left-flat fragment of any downward closed TeamLTL-extension. Moreover, we establish that the model checking problem of TeamLTL with Boolean disjunction and inclusion atoms is undecidable.

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