A Decade of Software
نویسنده
چکیده
P ́, preds ∪ refine(pr f)) The ability to refine the (Boolean program) abstraction to rule out a spurious counterexample is known as the progress property of the CEGAR process. Despite the progress property, the CEGAR process offers no guarantee of terminating since the program P ́ may have an intractably large or infinite number of states; it can refine the Boolean program forever without discovering a proof of correctness or proof of error. However, as each Boolean program is guaranteed to overapproximate the behavior of the C program, stopping the CEGAR process before it terminates with a definitive result is no different from any terminating program analysis that produces false alarms. In practice, SLAM terminates with a definite result over 96% of the time on large classes of device drivers: for Windows Driver Framework (WDF) drivers, the figure is Figure 2. Graphical illustration and ML-style pseudocode of CEGAR loop. cprog P bprog b predicates proof of unsat. trace cprog P′ P passes s
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