Fujitsu Corporation

Thomas W Sidle

Jawahar Jain

Mukul Ranjan Prasad

Subramanian K Iyer

Koichiro Takayama

Christian Stangier

In one embodiment, a method includes simulating by one or more computer systems a larger circuit to assign one or more values to one or more latch variables associated with the larger circuit, generating by the one or more computer systems one or more reduced circuits from the larger circuit according to the values assigned to the latch variables, generating by the one or more computer systems a transition relation (TR) for each reduced circuit, and generating by the one or more computer systems an initial state set for one or more instances of validation on the reduced circuits according to the TRs.

Validating one or more circuits using one or more grids

In one embodiment, a method for validating one or more circuits using one or more grids includes accessing a circuit and generating one or more seeds for executing one or more instances of validation on the circuit. Each instance of validation comprising one or more tasks. The method also includes distributing the tasks and the seeds across a grid including multiple nodes and, using the seeds, executing the instances of validation at the nodes in the grid according to the tasks.

Validating one or more circuits using one of more grids

In one embodiment, a method for invariant checking includes executing one or more first steps of a finite state machine (FSM) corresponding to one or more binary decision diagrams (BDDs) to traverse a state space of the FSM in a first direction with respect to an initial state and an erroneous state. The method also includes, automatically and without user input, accessing a first profile corresponding to the one or more first steps of the FSM, comparing the first profile with one or more first predetermined criteria, stopping the traversal of the state space in the first direction according to the comparison between the first profile and the one or more first predetermined criteria, executing one or more second steps of the FSM to traverse the state space in a second direction with respect to the initial state and the erroneous state opposite the first direction according to a first partial result from the one or more first steps of the FSM, accessing a second profile corresponding to the one or more second steps of the FSM, comparing the second profile with one or more second predetermined criteria, stopping the traversal of the state space in the second direction according to the comparison between the second profile and the one or more second predetermined criteria, and executing one or more third steps of the FSM to traverse the state space in the first direction from the one or more first steps according to a second partial result from the one or more second steps of the FSM.

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Cupertino, CA, United States of America

Thomas W Sidle