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Collect relevant entries

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This commit is contained in:
Jakob Rath 2023-12-01 15:18:57 +01:00
parent 7987ac4475
commit 878d4a2fd0
2 changed files with 12 additions and 8 deletions
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17
src/math/polysat/viable.cpp
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@ -1343,8 +1343,6 @@ namespace polysat {
// TODO: (combining intervals across equivalence classes from slicing)
//
// When iterating over intervals:
// - instead of only intervals of v, go over intervals of each entry of overlaps
// - need a function to map interval from overlap into an interval over v
@ -1525,15 +1523,17 @@ namespace polysat {
rational& val
) {
ptr_vector<entry> refine_todo;
ptr_vector<entry> relevant_entries;
// max number of interval refinements before falling back to the univariate solver
unsigned const refinement_budget = 100;
unsigned refinements = refinement_budget;
while (refinements--) {
lbool result = find_on_layer(v, widths.size() - 1, widths, overlaps, fbi, to_cover_lo, to_cover_hi, val, refine_todo);
relevant_entries.clear();
lbool result = find_on_layer(v, widths.size() - 1, widths, overlaps, fbi, to_cover_lo, to_cover_hi, val, refine_todo, relevant_entries);
// store bit intervals we have used
// store bit-intervals we have used
for (entry* e : refine_todo)
intersect(v, e);
refine_todo.clear();
@ -1578,7 +1578,8 @@ namespace polysat {
rational const& to_cover_lo,
rational const& to_cover_hi,
rational& val,
ptr_vector<entry>& refine_todo
ptr_vector<entry>& refine_todo,
ptr_vector<entry>& relevant_entries
) {
unsigned const w = widths[w_idx];
rational const& mod_value = rational::power_of_two(w);
@ -1659,6 +1660,8 @@ namespace polysat {
if (!e)
break;
relevant_entries.push_back(e);
if (e->interval.is_full())
return l_false;
@ -1722,7 +1725,7 @@ namespace polysat {
lower_cover_lo = 0;
lower_cover_hi = lower_mod_value;
rational a;
lbool result = find_on_layer(v, w_idx - 1, widths, overlaps, fbi, lower_cover_lo, lower_cover_hi, a, refine_todo);
lbool result = find_on_layer(v, w_idx - 1, widths, overlaps, fbi, lower_cover_lo, lower_cover_hi, a, refine_todo, relevant_entries);
VERIFY(result != l_undef);
if (result == l_false)
return l_false; // conflict
@ -1742,7 +1745,7 @@ namespace polysat {
lower_cover_hi = mod(next_val, lower_mod_value);
rational a;
lbool result = find_on_layer(v, w_idx - 1, widths, overlaps, fbi, lower_cover_lo, lower_cover_hi, a, refine_todo);
lbool result = find_on_layer(v, w_idx - 1, widths, overlaps, fbi, lower_cover_lo, lower_cover_hi, a, refine_todo, relevant_entries);
if (result == l_false)
return l_false; // conflict

3
src/math/polysat/viable.h
View file

@ -226,7 +226,8 @@ public:
rational const& to_cover_lo,
rational const& to_cover_hi,
rational& out_val,
ptr_vector<entry>& refine_todo);
ptr_vector<entry>& refine_todo,
ptr_vector<entry>& relevant_entries);
std::pair<entry*, bool> find_value(rational const& val, entry* entries);