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prepare for diseq_lin viable

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Nikolaj Bjorner 2021-12-13 12:00:19 -08:00
parent 651b41f8c0
commit 8c2735e68b
3 changed files with 30 additions and 9 deletions
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15
src/math/polysat/forbidden_intervals.cpp
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@ -20,10 +20,11 @@ Author:
namespace polysat {
/** Precondition: all variables other than v are assigned.
/**
*
* \param[out] out_interval The forbidden interval for this constraint
* \param[out] out_neg_cond Negation of the side condition (the side condition is true when the forbidden interval is trivial). May be NULL if the condition is constant.
* \param[in] c Original constraint
* \param[in] v Variable that is bounded by constraint
* \param[out] fi "forbidden interval" record that captures values not allowed for v
* \returns True iff a forbidden interval exists and the output parameters were set.
*/
@ -55,7 +56,7 @@ namespace polysat {
SASSERT(b2.is_val());
// TBD: use fi.coeff = -1 to tell caller to treat it as a diseq_lin.
// record a1, a2, b1, b2 for fast access and add side conditions on b1, b2?
// record a1, a2, b1, b2 for fast access, add non_unit side conditions on b1 = e1, b2 = e2?
if (a1 != a2 && !a1.is_zero() && !a2.is_zero())
return false;
@ -224,7 +225,9 @@ namespace polysat {
void forbidden_intervals::add_non_unit_side_conds(fi_record& fi, pdd const& b1, pdd const& e1, pdd const& b2, pdd const& e2) {
if (fi.coeff == 1)
return;
fi.side_cond.push_back(s.eq(b1, e1));
fi.side_cond.push_back(s.eq(b2, e2));
if (b1 != e1)
fi.side_cond.push_back(s.eq(b1, e1));
if (b2 != e2)
fi.side_cond.push_back(s.eq(b2, e2));
}
}