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arXiv 1406.4249cs.LOcs.FL
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LTL中的折扣

Discounting in LTL

Shaull Almagor, Udi Boker, Orna Kupferman

摘要:

近年来,越来越多的需求和兴趣,形式化和推理的软件和硬件系统的质量。与传统的验证不同,传统的验证处理的是系统是否满足给定规范的问题,关于质量的推理处理的是系统满足规范的\emph{how well}问题。这种努力的一个方向是将时态逻辑的“最终”运算符细化为{ \em折扣运算符}:规范的满意值是$[0,1]$中的值,其中满足可能性需求所花费的时间越长,满意值就越小。本文介绍了线性时态逻辑的一种折扣增广,并对其进行了研究,同时也研究了它与命题质量算子的结合。我们表明,可以增加LTL与任意一组贴现函数,同时保持模型检查问题的可判定性。用一元命题质量算子进一步扩充逻辑保持了可判定性,而增加平均算子使一些问题不可判定。我们还讨论了问题的复杂性,以及各种扩展。

英文摘要:

In recent years, there is growing need and interest in formalizing and reasoning about the quality of software and hardware systems. As opposed to traditional verification, where one handles the question of whether a system satisfies, or not, a given specification, reasoning about quality addresses the question of \emph{how well} the system satisfies the specification. One direction in this effort is to refine the "eventually" operators of temporal logic to {\em discounting operators}: the satisfaction value of a specification is a value in $[0,1]$, where the longer it takes to fulfill eventuality requirements, the smaller the satisfaction value is. In this paper we introduce an augmentation by discounting of Linear Temporal Logic (LTL), and study it, as well as its combination with propositional quality operators. We show that one can augment LTL with an arbitrary set of discounting functions, while preserving the decidability of the model-checking problem. Further augmenting the logic with unary propositional quality operators preserves decidability, whereas adding an average-operator makes some problems undecidable. We also discuss the complexity of the problem, as well as various extensions.

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。

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