Hard satisfiable formulas for DPLL-type algorithms

Published 15 Jan 2003 in cs.CC | (0301012v1)

Abstract: We address lower bounds on the time complexity of algorithms solving the propositional satisfiability problem. Namely, we consider two DPLL-type algorithms, enhanced with the unit clause and pure literal heuristics. Exponential lower bounds for solving satisfiability on provably satisfiable formulas are proven.

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