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fix #2630

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-10-12 04:12:06 -07:00
parent a1b690032a
commit d0cf1458e3
1 changed files with 2 additions and 1 deletions
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src/math/polynomial/algebraic_numbers.cpp
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@ -125,7 +125,8 @@ namespace algebraic_numbers {
}
bool acell_inv(algebraic_cell const& c) {
return c.m_sign_lower == (upm().eval_sign_at(c.m_p_sz, c.m_p, lower(&c)) == polynomial::sign_neg);
auto s = upm().eval_sign_at(c.m_p_sz, c.m_p, lower(&c));
return s == polynomial::sign_zero || c.m_sign_lower == (s == polynomial::sign_neg);
}
void checkpoint() {