Deductive Reasoning versus Model Checking: Two Formal Approaches for System Development
We compare and contrast two formal approaches for system development: state-based notation with verification by deductive reasoning, exemplified here by action systems; and event-based notation with verification by model checking, here using CSP/FDR. Our purpose is to identify specific similarities and differences, and strengths and weaknesses of the two approaches by direct comparison on the same application. We examine a small case study of a store-and-forward network specified and refined using the two notations. Our work illustrates that different approaches lead to different developmental strategies and can reveal complementary aspects of a system, indicating that unified techniques may be effective.
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