arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1606.07047cs.LO
收藏

决定超性质

Deciding Hyperproperties

Bernd Finkbeiner, Christopher Hahn

摘要:

超性质,如观测决定论或对称性,不能表示为单个计算轨迹的性质,因为它们描述了多个计算轨迹之间的关系。HyperLTL是一种时态逻辑,它通过跟踪变量来捕获这种关系,跟踪变量是通过存在和泛跟踪量词引入的,可以用于同时引用多个计算。本文研究了HyperLTL的可满足性问题。我们发现,这个问题是PSPACE-完全的替代自由的公式(因此,没有比LTL可满足性更昂贵),EXPSPACE-完全的存在,为所有的公式,和undecidable为所有存在的公式。许多实际的超性质可以表示为无择一公式。我们的结果表明,这类性质的可满足性和蕴涵都是可判定的。

英文摘要:

Hyperproperties, like observational determinism or symmetry, cannot be expressed as properties of individual computation traces, because they describe a relation between multiple computation traces. HyperLTL is a temporal logic that captures such relations through trace variables, which are introduced through existential and universal trace quantifiers and can be used to refer to multiple computations at the same time. In this paper, we study the satisfiability problem of HyperLTL. We show that the problem is PSPACE-complete for alternation-free formulas (and, hence, no more expensive than LTL satisfiability), EXPSPACE-complete for exists-forall-formulas, and undecidable for forall-exists-formulas. Many practical hyperproperties can be expressed as alternation-free formulas. Our results show that both satisfiability and implication are decidable for such properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑