Computer Science – Logic in Computer Science
Scientific paper
2011-01-27
Computer Science
Logic in Computer Science
To appear in FSEN'11. Extended version with details of the ASF+SDF translation of SML into mCRL2
Scientific paper
The control software of the CERN Compact Muon Solenoid experiment contains over 30,000 finite state machines. These state machines are organised hierarchically: commands are sent down the hierarchy and state changes are sent upwards. The sheer size of the system makes it virtually impossible to fully understand the details of its behaviour at the macro level. This is fuelled by unclarities that already exist at the micro level. We have solved the latter problem by formally describing the finite state machines in the mCRL2 process algebra. The translation has been implemented using the ASF+SDF meta-environment, and its correctness was assessed by means of simulations and visualisations of individual finite state machines and through formal verification of subsystems of the control software. Based on the formalised semantics of the finite state machines, we have developed dedicated tooling for checking properties that can be verified on finite state machines in isolation.
Hwong Yi-Ling
Kusters Vincent J. J.
Willemse Tim A. C.
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