Controlling state explosion in static simulation by selective composition

Static simulation is a method to compile event driven simulations into a single composite state machine. Code generated based on this does not require the event management overheads of an event driven simulator resulting in significant speedup on this overhead. In this paper we present an implementation of static simulation, highlight the problems of pure static unfolding and suggest methods to control the possibility of state explosion. Specific methods suggested include special schemes for handling lumped delays, selective tracking, unclocking of individual blocks and partial composition.