An automatic test pattern generation system, SOCRATES, is presented. SOCRATES includes several novel concepts and techniques that significantly improve and accelerate the automatic test pattern generation process for combinational and scan-based circuits. Based on the FAN algorithm, improved implication, sensitization, and multiple backtrace procedures are described. The application of these techniques leads to a considerable reduction of the number of backtrackings and an earlier recognition of conflicts and redundancies. Several experiments using a set of combinational benchmark circuits demonstrate the efficiency of SOCRATES and its cost-effectiveness, even in a workstation environment.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Schulz et al. (1988) studied this question.
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