Abstract: This disclosure relates to signal observability rating. In an example, a method can include propagating a clock signal through a respective module of a circuit design in a forward and backward direction, evaluating clock signal propagation results for the respective module based on a forward and backward clock signal propagation of the clock signal to compute an observability rating for a data signal to be processed by the respective module during formal verification, and updating a current observability rating of the respective property for the data signal to the computed observability rating.

Abstract: The present disclosure relates to a method for electronic circuit design. Embodiments may include providing, using at least one processor, an electronic design and isolating a combinational loop associated with the electronic design. Embodiments may further include inserting a sequential element in a loop path of the combinational loop, wherein the sequential element has a clock that is at least twice as fast as a fastest system clock associated with the electronic design. Embodiments may also include generating a property that determines whether an input and an output of the sequential element is never different and determining whether the property is true using formal verification.

Abstract: The present disclosure relates to a method for electronic circuit design. Embodiments may include receiving, using a processor, an electronic circuit design and identifying at least one combinational loop associated with the electronic circuit design. Embodiments may also include extracting, for each component of the loop, a set of logic conditions and modeling the at least one combinational loop. Embodiments may further include providing a graphical user interface configured to display one or more constraint candidates and determining whether or not a conflict exists between constraint candidates. Embodiments may also include ranking the constraint candidates, based upon, at least in part, a number of loops disabled and one or more disabled loop characteristics.

Abstract: The present disclosure relates to a method for formal verification of an electronic design. Embodiments may include receiving, using a processor, an electronic design having a plurality of clock configurations associated therewith and identifying a target clock configuration associated with the electronic design. Embodiments may also include receiving a range of clock factor values from a user, wherein each clock factor value corresponds to a frequency of the target clock configuration. Embodiments may further include selecting, via a formal engine, at least one clock factor value from the range and selecting, via the formal engine, at least one clock phase associated with the target clock configuration. Embodiments may also include performing formal verification of the electronic design, based upon, at least in part, the at least one clock factor value or the at least one clock phase.