Istituto per La Ricerca Scientifica E Tecnologica Certification of Translators via Off- Line and On-line Proof Logging and Checking Certiication of Translators via Oo-line and On-line Proof Logging and Checking

نویسندگان

Piergiorgio Bertoli

Alessandro Cimatti

Fausto Giunchiglia

Paolo Traverso

چکیده

limited distribution notice This report has been submitted for publication outside of ITC and will probably be copyrighted if accepted for publication. It has been issued as a Technical Report for early dissemination of its contents. In view of thetransfer of copyright to the outside publisher, its distribution outside of ITC prior to publication should be limited to peer communications and speciic requests. After outside publication, requests should be lled only by reprints or legally obtained copies of the article. Abstract Using non failure-safe components in the implementation of safety-critical systems is desirable because of the extremely high cost of certiied components. In order to enhance the safety of such systems, we adopt a solution based on the idea of verifying each single execution of the software running upon them. In particular, we consider the class of translation-based tools used in the development of safety-critical systems. In order perform the veriication in an automatic and eecient way, we follow an innovative approach, by distinguishing an oo-line and an on-line veriication phases. Each proof in the two phases is guaranteed correct thanks to the the use of a logging-and-checking architecture for the tools used to generate them. We describe in detail the oo-line and on-line logging-and-checking methodology, its application in the frame of an industrial project, and the ongoing logging-and-checking redesign of a state-of-the-art prover which we intend to use in future applications.

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