Formal approaches have been used in GUARDS as one of the elements of the validation strategy. In particular, formal verification has concentrated on four dependability mechanisms, namely: a) clock synchronisation, b) interactive consistency, c) fault diagnosis, and d) multi-level integrity. The first three mechanisms constitute basic building-blocks of the architecture, and the fourth one corresponds to a major innovation. The formal approaches applied include both theorem-proving and model-checking.
KeywordsModel Checker Fault Diagnosis Formal Verification Process Algebra Clock Synchronisation
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