Computer Science – Logic in Computer Science
Scientific paper
2003-04-15
Computer Science
Logic in Computer Science
24 pages
Scientific paper
A large number of different model checking approaches has been proposed during the last decade. The different approaches are applicable to different model types including untimed, timed, probabilistic and stochastic models. This paper presents a new framework for model checking techniques which includes some of the known approaches, but enlarges the class of models for which model checking can be applied to the general class of weighted automata. The approach allows an easy adaption of model checking to models which have not been considered yet for this purpose. Examples for those new model types for which model checking can be applied are max/plus or min/plus automata which are well established models to describe different forms of dynamic systems and optimization problems. In this context, model checking can be used to verify temporal or quantitative properties of a system. The paper first presents briefly our class of weighted automata, as a very general model type. Then Valued Computational Tree Logic (CTL$) is introduced as a natural extension of the well known branching time logic CTL. Afterwards, algorithms to check a weighted automaton according to a CTL$ formula are presented. As a last result, a bisimulation is presented for weighted automata and for CTL$.
Buchholz Peter
Kemper Peter
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