%T Adding Formal Verification to occam\-π
%A Peter H. Welch, Jan Bækgaard Pedersen, Frederick R. M. Barnes, Carl G. Ritson, Neil C.C. Brown
%E Peter H. Welch, Adam T. Sampson, Jan Bækgaard Pedersen, Jon Kerridge, Jan F. Broenink, Frederick R. M. Barnes
%B Communicating Process Architectures 2011
%X 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 <em>writing</em>
and <em>compiling</em> programs. A case\-study
analysing a new (and elegant) solution to the
<em>Dining Philosophers</em> problem is
presented. Deadlock\-freedom for colleges with
<em>any</em> 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 <em>model
compression</em> 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
If you have any comments on this database, including inaccuracies, requests to remove or add information, or suggestions for improvement, the WoTUG web team are happy to hear of them. We will do our best to resolve problems to everyone's satisfaction.
Copyright for the papers presented in this database normally resides with the authors; please contact them directly for more information. Addresses are normally presented in the full paper.
Pages © WoTUG, or the indicated author. All Rights Reserved.
Comments on these web pages should be addressed to: www at wotug.org