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In computer science, a [[simulation]] is a computation of the execution of some appropriately modelled [[state transition system|state-transition system]]. Typically this process models the complete state of the system at individual points in a discrete linear time frame, computing each state sequentially from its predecessor. Models for computer programs or VLSI logic designs can be very easily simulated, as they often have an [[operational semantics]] which can be used directly for simulation.
'''Symbolic simulation''' is a form of simulation where many possible executions of a system are considered simultaneously. This is typically achieved by augmenting the ___domain over which the simulation takes place. A symbolic [[Variable (programming)|variable]] can be used in the simulation state representation in order to index multiple executions of the system.<ref>{{Cite
Because symbolic simulation can cover many system executions in a single simulation, it can greatly reduce the size of verification problems. Techniques such as [[symbolic trajectory evaluation]] (STE) and [[generalized symbolic trajectory evaluation]] (GSTE) are based on this idea of symbolic simulation.
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