Predicate-based compositional minimization in a verification environment

Abstract

A system for performing verification includes a means for: importing a design netlist containing component(s), computing output function(s) for the component(s), generating output equivalent state set(s) from the output function(s), identifying next-state function(s) for the component(s), means for producing image equivalent state set(s) for the next-state function(s), means for classifying output-and-image equivalent state set(s) for the image equivalent state set(s) and the output equivalent state set(s), getting a preimage from the next-state function(s) and the output-and-image equivalent state(s) to generate a preimage of the output-and-image equivalent state(s), partitioning over original state(s) of the component(s), and equivalent class input set(s) of the component(s). Moreover, the system includes a means for: selecting input representative(s) of the equivalent input set(s), forming an input map from the input representative(s), synthesizing the input map, and injecting the input map back into the netlist to generate a modified netlist.