Static probability defines the fraction of time during which the considered element is driven at a high (1’b1) logic level and the valid range is 0 to 1. As an example, if a signal is at Logic 1 for 40 ns in a duration of 100 ns, the static probability = 40/100 = 0.4.
Tip: Static Probability = 1
represents that the considered element is held at Logic 1 throughout the analysis
duration and never toggles. Similarly, Static Probability=0 represents that the
considered element is held at Logic 0 throughout the analysis duration and never
toggles.