This paper introduces GRASP (Generic seaRch Algorithm for the Satisfiability Problem), a new search algorithm for Propositional Satisfiability (SAT). GRASP incorporates several search-pruning techniques that proved to be quite powerful on a wide variety of SAT problems. Some of these techniques are specific to SAT, whereas others are similar in spirit to approaches in other fields of Artificial Intelligence. GRASP is premised on the inevitability of conflicts during the search and its most distinguishing feature is the augmentation of basic backtracking search with a powerful conflict analysis procedure. Analyzing conflicts to determine their causes enables GRASP to backtrack nonchronologically to earlier levels in the search tree, potentially pruning large portions of the search space. In addition, by "recording" the causes of conflicts, GRASP can recognize and preempt the occurrence of similar conflicts later on in the search. Finally, straightforward bookkeeping of the causality chains leading up to conflicts allows GRASP to identify assignments that are necessary for a solution to be found. Experimental results obtained from a large number of benchmarks indicate that application of the proposed conflict analysis techniques to SAT algorithms can be extremely effective for a large number of representative classes of SAT instances.

/pdf/grasp-a-search-algorithm-for-propositional-satisfiability-3nd8josgc5.pdf

GRASP: a search algorithm for propositional satisfiability

This paper introduces GRASP (Generic seaRch Algorithm for the Satisfiability Problem), an integrated algorithmic framework for SAT that unifies several previously proposed search-pruning techniques and facilitates identification of additional ones. GRASP is premised on the inevitability of conflicts during search and its most distinguishing feature is the augmentation of basic backtracking search with a powerful conflict analysis procedure. Analyzing conflicts to determine their causes enables GRASP to backtrack non-chronologically to earlier levels in the search tree, potentially pruning large portions of the search space. In addition, by "recording" the causes of conflicts, GRASP can recognize and preempt the occurrence of similar conflicts later on in the search. Finally, straightforward bookkeeping of the causality chains leading up to conflicts allows GRASP to identify assignments that are necessary for a solution to be found. Experimental results obtained from a large number of benchmarks, including many from the field of test pattern generation, indicate that application of the proposed conflict analysis techniques to SAT algorithms can be extremely effective for a large number of representative classes of SAT instances.

https://eprints.soton.ac.uk/262031/1/jpms-iccad96.pdf

GRASP—a new search algorithm for satisfiability

Asynchronous design has been an active area of research since at least the mid 1950's, but has yet to achieve widespread use. We examine the benefits and problems inherent in asynchronous computations, and in some of the more notable design methodologies. These include Huffman asynchronous circuits, burst-mode circuits, micropipelines, template-based and trace theory-based delay-insensitive circuits, signal transition graphs, change diagrams, and complication-based quasi-delay-insensitive circuits. >

/pdf/asynchronous-design-methodologies-an-overview-3wmqy4bbzx.pdf

Asynchronous design methodologies: an overview

The use of design descriptions in automated diagnosis

VLSI Test Principles and Architectures: Design for Testability (Systems on Silicon)

For many years, Breuer-Friedman's Diagnosis and Reliable Design ofDigital Systems was the most widely used textbook in digital system testing and testable design. Now, Computer Science Press makes available a new and greativ expanded edition. Incorporating a significant amount of new material related to recently developed technologies, the new edition offers comprehensive and state-ofthe-art treatment of both testing and testable design.

Digital Systems Testing and Testable Design

Diagnosis and Reliable Design of Digital Systems

This chapter contains sections titled: Basic Issues ATG for SSFs in Combinational Circuits ATG for SSFs in Sequential Circuits Concluding Remarks This chapter contains sections titled: References Problems

Testing for Single Stuck Faults

This chapter contains sections titled: The Bridging-Fault Model Detection of Nonfeedback Bridging Faults Detection of Feedback Bridging Faults Bridging Faults Simulation Test Generation for Bridging Faults Concluding Remarks This chapter contains sections titled: References Problems

Arthur D. Friedman

Papers

Digital Systems Testing and Testable Design

Diagnosis and Reliable Design of Digital Systems

Testing for Single Stuck Faults

Testing for Bridging Faults

Logic Level Simulation