Effective Bit-Width and Under-Approximation

  title={Effective Bit-Width and Under-Approximation},
  author={Robert Brummayer and Armin Biere},
Recently, it has been proposed to use approximation techniques in the context of decision procedures for the quantifier-free theory of fixed-size bit-vectors. We discuss existing and novel variants of underapproximation techniques. Under-approximations produce smaller models and may reduce solving time significantly. We propose a new technique that allows early termination of an under-approximation refinement loop, although the original formula is unsatisfiable. Moreover, we show how over… CONTINUE READING
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