Abstract: A system including a microarchitecture model, a memory model, and a plurality of snapshots. The microarchitecture model is of a microarchitecture design capable of executing a sequence of program instructions. The memory model is generally accessible by the microarchitecture model for storing and retrieving the program instructions capable of being executed on the microarchitecture model and any associated data. The plurality of snapshots are generally available for initializing a number of instances of the microarchitecture model, at least some of which may contain values assigned to one or more registers or memory regions in response to interaction with one or more external entities during a first pass of a simulation of the microarchitecture. The number of instances is generally greater than one and generally perform high-detail simulation. The number of instances, when launched and executed during a second pass of the simulation of the microarchitecture, have run time periods that overlap.