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Paper Details@InProceedings{Welch11,title = "{A}dding {F}ormal {V}erification to occam-\π", author= "Welch, Peter H. and Pedersen, Jan Bækgaard and Barnes, Frederick R. M. and Ritson, Carl G. and Brown, Neil C.C.", editor= "Welch, Peter H. and Sampson, Adam T. and Pedersen, Jan Bækgaard and Kerridge, Jon and Broenink, Jan F. and Barnes, Frederick R. M.", pages = "379--379", booktitle= "{C}ommunicating {P}rocess {A}rchitectures 2011", isbn= "978-1-60750-773-4", year= "2011", month= "jun", abstract= "This is a proposal for the formal verification of occam-\π programs to be managed entirely within occam-\π. The language is extended with qualifiers on types and processes (to indicate relevance for verification and/or execution) and assertions about refinement (including deadlock, livelock and determinism). The compiler abstracts a set of CSPm equations and assertions, delegates their analysis to the FDR2 model checker and reports back in terms related to the occam-\π source. The rules for mapping the extended occam-\π to CSPm are given. The full range of CSPm assertions is accessible, with no knowledge of CSP formalism required by the occam-\π programmer. Programs are proved just by \textlessem\textgreaterwriting\textless/em\textgreater and \textlessem\textgreatercompiling\textless/em\textgreater programs. A case-study analysing a new (and elegant) solution to the \textlessem\textgreaterDining Philosophers\textless/em\textgreater problem is presented. Deadlock-freedom for colleges with \textlessem\textgreaterany\textless/em\textgreater number of philosphers is established by verifying an induction argument (the base and induction steps). Finally, following guidelines laid down by Roscoe, the careful use of \textlessem\textgreatermodel compression\textless/em\textgreater is demonstrated to verify directly the deadlock-freedom of an occam-\π college with 10\^{}2000 philosphers (in around 30 seconds). All we need is a universe large enough to contain the computer on which to run it." } |
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