Intent:
The Absence Property Pattern is used to specify portions of a design model's verification execution where a specific state or event1 should never occur. Also known Never.
Motivation:
In the normal execution of an RTL state-based model, there are often specific events or states that should never occur. One of the most common examples of the Absence Property Pattern is mutual exclusion.
Applicability:
Any event that can be expressed as a proposition (e.g., Boolean equation), and describes undesirable behavior in a design, can be formulated into an absence property.
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