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This article presents an improved version of Bledsoe's SUP-INF method for proving theorems in a subclass of Presburger arithmetic The improved method is able to determine mvahdRy as well as vahdlty, and provides counterexamples for formulas determined to be mvahd A proof of correctness is given for the algorithms on which the method is based Implementation results are discussed, as is an apphcation to linear programming
Robert E. Shostak (Sat,) studied this question.