Verification Witnesses

Over the last years, witness-based validation of verification results has become an established practice in software verification: An independent validator re-establishes a verifier using witnesses, which are stored standardized exchange format. In addition to validation, such exchangable information about proofs and alarms found by can be shared across tools, users apply third-party tools visualize explore witnesses help them comprehend causes bugs or reasons why given program is correct. To achieve goal making more accessible engineers, it necessary consider as first-class exchangeable objects, independently from source code checked that produced them, respecting important principle separation concerns. We present conceptual principles give description how use provide technical specification format for perform extensive experimental study on application result validators CPAchecker , UAutomizer CPA-witness2test FShell-witness2test .