Composing Safe Systems
Failures in component-based systems are generally due to unintended or incorrect interactions among the components. For safety-critical systems, we may attempt to eliminate unintended interactions, and to verify correctness of those that are intended. We describe the value of partitioning in eliminating unintended interactions, and of assumption synthesis in developing a robust foundation for verification. We show how model checking of very abstract designs can provide mechanized assistance in human-guided assumption synthesis.
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