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    A Tale of Two Proofs

    3rd BCS-FACS Northern Formal Methods Workshop

    Ilkley, UK. 14th - 15th September 1998

    AUTHORS

    S. Stepney

    ABSTRACT

    One of the touted advantages of formal methods is the ability to do proof. But examples of proofs as part of industrial formal methods projects are relatively hard to find.

    I describe here two of the large Z proof projects I have been involved in at Logica, and show how the entire specification and proof process is deeply affected by why something is being proved, what is being proved, and how the finished proof is to be presented.

    I finish off by describing, based on my experiences, what I believe to be the requirements for an industrial-strength Z proof tool.

    PAPER FORMATS

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