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We present an efficient approach to reachability analysis of Büchi Pushdown System (BPDS) models for Hardware/Software (HW/SW) co-verificat-ion This approach utilizes the asynchronous nature of the HW/SW interactions to reduce unnecessary HW/SW state transition orders being explored in co-verificat-ion The reduction is applied when the verification model is constructed We have realized this approach in our co-verification tool, CoVer, and applied it to the co-verification of two fully functional Windows device drivers with their device models respectively Both of the drivers are open source and their original C code has been used CoVer has proven seven safety properties and detected seven previously undiscovered software bugs Evaluation shows that the reduction can significantly scale co-verification.

Efficient Reachability Analysis of Büchi Pushdown Systems for Hardware/Software Co-verification