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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2022-12-29 20:07:14 -08:00
parent f8a3e428ff
commit 1c7ac12af8
1 changed files with 7 additions and 4 deletions
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11
src/math/polysat/saturation.cpp
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@ -1422,7 +1422,7 @@ namespace polysat {
*/
bool saturation::try_add_mul_bound(pvar x, conflict& core, inequality const& a_l_b) {
// if (try_add_mul_bound2(x, core, a_l_b))
// if (try_add_mul_bound2(x, core, a_l_b))
// return true;
set_rule("[x] ax + b <= y, ... => a >= u_a");
@ -1615,7 +1615,7 @@ namespace polysat {
// a*x_bound*y + b*x_bound + c*y + d >= 0
// (a*x_bound + c)*y >= -d - b*x_bound
// if a*x_bound + c > 0
// if a*x_bound + c < 0
rational A = a*x_bound + c;
if (A >= 0)
return true;
@ -1698,7 +1698,8 @@ namespace polysat {
y = (y1 == null_var) ? y2 : y1;
rational y0 = s.get_value(y);
IF_VERBOSE(2,
IF_VERBOSE(2,
s.m_viable.display(verbose_stream(), x) << "\n";
verbose_stream() << "x_min " << x_min << " x_max " << x_max << "\n";
verbose_stream() << "v" << y << " " << y0 << "\n";
verbose_stream() << p << " " << a1 << " " << b1 << " " << c1 << " " << d1 << "\n";
@ -1723,6 +1724,7 @@ namespace polysat {
return false;
if (!update_max(y_max, x_min, x_max, a2, b2, c2, d2))
return false;
verbose_stream() << " p - q > 0 " << y_min << " " << y_max << "\n";
// p < M iff -p > -M iff -p + M - 1 >= 0
if (!update_min(y_min, x_min, x_max, -a1, -b1, -c1, -d1 + M - 1))
return false;
@ -1736,11 +1738,12 @@ namespace polysat {
// so p > q or p >= q
// p - q - 1 >= 0 or p - q >= 0
// min-max for p - q - 1 or p - q are non-negative
verbose_stream() << " p - q > 0 " << y_min << " " << y_max << "\n";
if (!update_min(y_min, x_min, x_max, a1 - a2, b1 - b2, c1 - c2, d1 - d2 - (a_l_b.is_strict() ? 0 : 1)))
return false;
if (!update_max(y_max, x_min, x_max, a1 - a2, b1 - b2, c1 - c2, d1 - d2 - (a_l_b.is_strict() ? 0 : 1)))
return false;
verbose_stream() << "min-max: " << y_min << " " << y_max << "\n";
verbose_stream() << "min-max: " << y_min << " " << y_max << " y0 " << y0 << "\n";
SASSERT(y_min <= y0 && y0 <= y_max);
if (y_min == y_max)