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Semiformal, or hybrid, verification techniques are extensively used in pre-silicon hardware verification. Most approaches combine simulation and formal verification (FV) algorithms to achieve better design coverage than conventional simulation and scale better than FV. In this paper we introduce a purely SAT-based semiformal verification (SFV) method that is based on new algorithms for generating...
The evaluation of the dependability performance (RAMS) of complex embedded systems requires the development of new approaches. In software-intensive systems, the dependability structure of the functions depends on the software. The search of fault sequences must involve software and hardware. The proposed method contributes to the qualitative and quantitative safety analysis of systems and micro-systems.
The bugbear of model checking is the explosion in the number of states as the number of processes increases. Industrial-sized problems are often intractable for model checkers. We modify the most popular model checker in use today, SPIN, by replacing its internal verification search engine by a guided, random-walk based simulator. The resulting tool is called RANSPIN. The guiding mechanism used in...
Ramadge and Wonham [1] gave algorithms for finding controllers in their supervisory control framework. Their automatic synthesis techniques are implemented here using binary decision diagrams [2]. This technique of symbolic representation capitalizes on loose coupling between controlled plant components. We are able to synthesize a controller for a wafer-manufacturing plant, for which an explicit...
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