arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0912.4117cs.LOcs.CC
收藏

单计数器过程的分支时间模型检验

Branching-time model checking of one-counter processes

Stefan Göller, Markus Lohrey

摘要:

单计数器进程(OCP)是下推进程,只对一元堆栈字母表进行操作。研究了基于OCP的模型检验计算树逻辑(CTL)的计算复杂性。一个PSPACE上界是继承自该问题的模态μ演算。首先,我们分析的周期性行为的CTL在OCP和推导出一个模型检验算法,其运行时间是指数的控制位置和语法概念的公式,我们称之为直到深度。因此,模型检验固定OCP对CTL公式与一个固定的深度,直到在P。这概括了第一作者,Mayr,和到CTL的片段EF的表达复杂性的结果。其次,我们证明了在一定的OCP上,CTL模型检验是PSPACE困难的。第三,我们表明,已经存在一个固定的CTL公式,模型检验的OCP是PSPACE困难的。对于后者,我们使用了复杂性理论的两个结果:(i)将中国余数表示中的自然数转换为二进制表示是在对数空间一致的NC ^1中;(ii)PSPACE是AC ^0-可串行化的。我们证明,我们的方法可以用来回答进一步的开放性问题。

英文摘要:

One-counter processes (OCPs) are pushdown processes which operate only on a unary stack alphabet. We study the computational complexity of model checking computation tree logic (CTL) over OCPs. A PSPACE upper bound is inherited from the modal mu-calculus for this problem. First, we analyze the periodic behaviour of CTL over OCPs and derive a model checking algorithm whose running time is exponential only in the number of control locations and a syntactic notion of the formula that we call leftward until depth. Thus, model checking fixed OCPs against CTL formulas with a fixed leftward until depth is in P. This generalizes a result of the first author, Mayr, and To for the expression complexity of CTL's fragment EF. Second, we prove that already over some fixed OCP, CTL model checking is PSPACE-hard. Third, we show that there already exists a fixed CTL formula for which model checking of OCPs is PSPACE-hard. For the latter, we employ two results from complexity theory: (i) Converting a natural number in Chinese remainder presentation into binary presentation is in logspace-uniform NC^1 and (ii) PSPACE is AC^0-serializable. We demonstrate that our approach can be used to answer further open questions.

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。

↑