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Time - action alternating model for timed LOTOS and its symbolic verification of bisimulation equivalence

机译:定时LOTOS的时间-动作交替模型及其双仿真等价性的符号验证。

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Verification of timed bisimulation equivalence is generally difficult because of state explosion caused by concrete time values. In this paper, we propose a verification method to verify timed bisimulation equivalence of two timed processes using a symbolic technique similar to (Hennessy and Lin 1995). We first propose a new model of timed processes, Alternating Timed Symbolic Labelled Transition System (A-TSLTS). In A-TSLTS, each state has some parameter variables and those values determine its behaviour. Each transition in an A-TSLTS has a guard predicate. The transition is executable if and only if its guard predicate is true under specified parameter values. In the proposed method, we can obtain the weakest condition for a state-pair in a finite A-TSLTS to make the state-pair be timed bisimulation equivalent. We also show that this result can be applied to the language LOTOS/T(Nakata et al. 1994), a timed extension of LOTOS (ISO 1989).
机译:由于具体时间值导致状态爆炸,因此很难对定时双仿真等效性进行验证。在本文中,我们提出了一种验证方法,使用类似于(Hennessy and Lin 1995)的符号技术来验证两个定时过程的定时双仿真等效性。我们首先提出一种定时过程的新模型,即交替定时符号标记转换系统(A-TSLTS)。在A-TSLTS中,每个状态都有一些参数变量,这些值决定其行为。 A-TSLTS中的每个转换都有一个保护谓词。当且仅当在指定参数值下其保护谓词为true时,转换才可执行。在提出的方法中,我们可以在有限的A-TSLTS中获得状态对的最弱条件,以使状态对在定时双仿真中等效。我们还表明,该结果可以应用于LOTOS / T语言(Nakata等,1994),是LOTOS的定时扩展(ISO 1989)。

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