Difference between revisions of "MCInstrumentation"

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(New page: = Application Instrumentation and Assistance in BPmc The following API calls can be used inside Java b-thread to control the model checking process. Throughout, the term nextVerification...)
 
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= Application Instrumentation and Assistance in BPmc
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The following API calls can be used inside Java b-thread to control the model checking process.
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Throughout, the term nextVerificationState refers to the applictation's (composite) state at next synchronization point, when all b-threads are synchronized.
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== markNextVerificationStateAsBad() ==
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* Indicates safety property violation. MC stops and prints a counterexample.
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== markNextVerificationStateAsHot() ==
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* Used for liveness property checking. BPmc looks for reachable cycles that contains only hot states (and no cold states). By default, states are considered cold. 
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== pruneSearchNow()
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- forces backtracking immediately, possibly stopping other b-threads and possibly before the badness of the next state is determined
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pruneAtNextVerificationState()  - forces backtracking �after all b-threads reach the next state and after its badness is determined.
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labelNextVerificationState(…): optionally provides a label for a b-thread state, to be used in constructing the BP-state (concatenating all bt-states).
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When BPmc reaches a state that was already fully checked – it backtracks. 
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If  b-thread doesn’t label its states – it is considered to have one state – and it doesn’t increase the size of the Cartesian product.
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While in regular runs a b-thread can terminate,  in a MC run A b-thread should not terminate. Precede/replace the return with bSync(none,none,none); In a regular run this will just terminate. In MC run it will allow the b-thread to backtrack from the end.
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Latest revision as of 14:04, 11 February 2014

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