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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Fluid Updates: Beyond Strong vs. Weak Updates
verfasst von : Isil Dillig, Thomas Dillig, Alex Aiken
Erschienen in: Programming Languages and Systems
Verlag: Springer Berlin Heidelberg
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We describe a
symbolic heap abstraction
that unifies reasoning about arrays, pointers, and scalars, and we define a
fluid update
operation on this symbolic heap that relaxes the dichotomy between strong and weak updates. Our technique is fully automatic, does not suffer from the kind of state-space explosion problem partition-based approaches are prone to, and can naturally express properties that hold for non-contiguous array elements. We demonstrate the effectiveness of this technique by evaluating it on challenging array benchmarks and by automatically verifying buffer accesses and dereferences in five Unix Coreutils applications with no annotations or false alarms.