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add cut

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2022-06-04 11:59:00 -07:00
parent da9382956c
commit ea365de820
2 changed files with 33 additions and 6 deletions
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26
src/sat/smt/arith_proof_checker.h
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@ -96,6 +96,31 @@ namespace arith {
mul(dst, x);
add(dst, src, y);
}
void cut(row& r) {
if (r.m_coeffs.empty())
return;
auto const& [v, coeff] = *r.m_coeffs.begin();
if (!a.is_int(v))
return;
rational lc = denominator(r.m_coeff);
for (auto const& [v, coeff] : r.m_coeffs)
lc = lcm(lc, denominator(coeff));
if (lc != 1) {
r.m_coeff *= lc;
for (auto & [v, coeff] : r.m_coeffs)
coeff *= lc;
}
rational g(0);
for (auto const& [v, coeff] : r.m_coeffs)
g = gcd(coeff, g);
if (g == 1)
return;
rational m = mod(r.m_coeff, g);
if (m == 0)
return;
r.m_coeff += g - m;
}
/**
* \brief populate m_coeffs, m_coeff based on mul*e
@ -205,6 +230,7 @@ namespace arith {
if (m_ineq.m_coeffs.empty() ||
m_conseq.m_coeffs.empty())
return false;
cut(m_ineq);
auto const& [v, coeff1] = *m_ineq.m_coeffs.begin();
rational coeff2;
if (!m_conseq.m_coeffs.find(v, coeff2))