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fix binary search string length axiom

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Murphy Berzish 2017-01-04 15:56:16 -05:00
parent f9d7981c1e
commit c190d45859
1 changed files with 1 additions and 1 deletions
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2
src/smt/theory_str.cpp
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@ -9367,7 +9367,7 @@ expr * theory_str::binary_search_length_test(expr * freeVar, expr * previousLenT
}
if (lastBounds.midPoint.is_neg()) {
TRACE("t_str_binary_search", tout << "WARNING: length search converged on a negative value. Negating this constraint." << std::endl;);
expr_ref axiom(m.mk_not(ctx.mk_eq_atom(mk_strlen(freeVar), m_autil.mk_numeral(lastBounds.midPoint, true))), m);
expr_ref axiom(m_autil.mk_ge(mk_strlen(freeVar), m_autil.mk_numeral(rational::zero(), true)), m);
return axiom;
}
// length is fixed