2003 | OriginalPaper | Buchkapitel
Automatic Construction of Hoare Proofs from Abstract Interpretation Results
verfasst von : Sunae Seo, Hongseok Yang, Kwangkeun Yi
Erschienen in: Programming Languages and Systems
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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By combining program logic and static analysis, we present an automatic approach to construct program proofs to be used in Proof-Carrying Code. We use Hoare logic in representing the proofs of program properties, and the abstract interpretation in computing the program properties. This combination automatizes proof construction; an abstract interpretation automatically estimates program properties (approximate invariants) of our interest, and our proof-construction method constructs a Hoare-proof for those approximate invariants. The proof-checking side (code consumer’s side) is insensitive to a specific static analysis; the assertions in the Hoare proofs are always first-order logic formulas for integers, into which we first compile the abstract interpreters’ results. Both the property-compilation and the proof construction refer to the standard safety conditions that are prescribed in the abstract interpretation framework. We demonstrate this approach for a simple imperative language with an example property being the integer ranges of program variables. We prove the correctness of our approach, and analyze the size complexity of the generated proofs.