Constraining traces in formal verification
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United States of America Patent
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Oct 14, 2014
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app pub date -
Dec 6, 2010
filing date -
Dec 6, 2010
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Abstract
The result of a property based formal verification analysis of a circuit design may include at least one counterexample for each property that is violated, which a user can use to debug the circuit design. To assist the user in this debugging process, a debugging tool applies one or more soft constraints to a counterexample trace that simplify the appearance of the trace when displayed as a waveform. The debugging tool thus facilitates a user's understanding of what parts of the counterexample trace are responsible for the property failure. Also described is a power analysis tool that increases the noise level of a trace for a circuit design in order to facilitate analysis of the circuit design's power characteristics.
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