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arXiv 1406.6683cs.LOcs.FL
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马尔可夫链上的参数LTL

Parametric LTL on Markov Chains

Souymodip Chakraborty, Joost-Pieter Kataon

摘要:

研究了有限马氏链对参数化LTL(pLTL)公式的验证问题.在pLTL中,直到模态配备有包含变量的界限;例如,$\Diamond_{\le x}\ φ$断言$φ$在$x$时间步长内成立,其中$x$是自然数上的变量。本文研究的中心问题是确定一组参数赋值$V_{\prec p} (φ)$,使得在马尔可夫链中满足pLTL公式$φ$的概率满足给定的阈值$\prec p$,其中$\prec$是实数的比较,$p$是概率.对于pLTL判定$V_{> 0}(φ)$的空性是不可判定的,我们考虑了几个逻辑片段。我们考虑参数可达性的属性,一个子逻辑的pLTL限制到下一个和$\Diamond_{\le x}$,参数Büchi属性,最后,一个最大的子类的pLTL的空$V_{> 0}(φ)$是可判定的。

英文摘要:

This paper is concerned with the verification of finite Markov chains against parametrized LTL (pLTL) formulas. In pLTL, the until-modality is equipped with a bound that contains variables; e.g., $\Diamond_{\le x}\ φ$ asserts that $φ$ holds within $x$ time steps, where $x$ is a variable on natural numbers. The central problem studied in this paper is to determine the set of parameter valuations $V_{\prec p} (φ)$ for which the probability to satisfy pLTL-formula $φ$ in a Markov chain meets a given threshold $\prec p$, where $\prec$ is a comparison on reals and $p$ a probability. As for pLTL determining the emptiness of $V_{> 0}(φ)$ is undecidable, we consider several logic fragments. We consider parametric reachability properties, a sub-logic of pLTL restricted to next and $\Diamond_{\le x}$, parametric Büchi properties and finally, a maximal subclass of pLTL for which emptiness of $V_{> 0}(φ)$ is decidable.

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