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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-12-13 10:24:42 -08:00
parent 33d433d742
commit c7da31a67d
7 changed files with 74 additions and 46 deletions
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28
src/math/polysat/forbidden_intervals.cpp
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@ -27,11 +27,9 @@ namespace polysat {
* \returns True iff a forbidden interval exists and the output parameters were set.
*/
bool forbidden_intervals::get_interval(signed_constraint const& c, pvar v, rational & coeff, eval_interval& out_interval, vector<signed_constraint>& out_side_cond) {
bool forbidden_intervals::get_interval(signed_constraint const& c, pvar v, fi_record& fi) {
if (!c->is_ule())
return false;
coeff = 1;
struct backtrack {
bool released = false;
@ -44,24 +42,30 @@ namespace polysat {
}
};
backtrack _backtrack(out_side_cond);
backtrack _backtrack(fi.side_cond);
auto [ok1, a1, e1, b1] = linear_decompose(v, c->to_ule().lhs(), out_side_cond);
auto [ok2, a2, e2, b2] = linear_decompose(v, c->to_ule().rhs(), out_side_cond);
fi.coeff = 1;
fi.src = c;
auto [ok1, a1, e1, b1] = linear_decompose(v, c->to_ule().lhs(), fi.side_cond);
auto [ok2, a2, e2, b2] = linear_decompose(v, c->to_ule().rhs(), fi.side_cond);
if (!ok1 || !ok2 || (a1.is_zero() && a2.is_zero()))
return false;
SASSERT(b1.is_val());
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?
if (a1 != a2 && !a1.is_zero() && !a2.is_zero())
return false;
SASSERT(b1.is_val());
SASSERT(b2.is_val());
_backtrack.released = true;
if (match_linear1(c, a1, b1, e1, a2, b2, e2, coeff, out_interval, out_side_cond))
if (match_linear1(c, a1, b1, e1, a2, b2, e2, fi.coeff, fi.interval, fi.side_cond))
return true;
if (match_linear2(c, a1, b1, e1, a2, b2, e2, coeff, out_interval, out_side_cond))
if (match_linear2(c, a1, b1, e1, a2, b2, e2, fi.coeff, fi.interval, fi.side_cond))
return true;
if (match_linear3(c, a1, b1, e1, a2, b2, e2, coeff, out_interval, out_side_cond))
if (match_linear3(c, a1, b1, e1, a2, b2, e2, fi.coeff, fi.interval, fi.side_cond))
return true;
_backtrack.released = false;