Probabilistic Analysis of Large Finite State Machines

Regarding finite state machines as Markov chains facilitates the application of probabilistic methods to very large logic synthesis and formal verification problems. Recently, we have shown how symbolic algorithms based on Algebraic Decision Diagrams may be used to calculate the steadystate probabilities of finite state machines with more than 10 8 states. These algorithms treated machines with state graphs composed of a single terminal strongly connected component. In this paper we consider the most general case of systems which can be modeled as state machines with arbitrary transition structures. The proposed approach exploits structural information to decompose and simplify the state graph of the machine. 1 Introduction Finite state machines (FSMs), or their extensions, are often employed to model real digital systems for formal verification. As the complexity of those systems increases, probabilistic approaches to design and implementation verification become of interest; for..