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enable more simplification in case inequality triggers a change.

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This commit is contained in:
Nikolaj Bjorner 2023-10-21 19:58:39 -07:00
parent 4e21e126a8
commit 8fac89cdcc
5 changed files with 63 additions and 7 deletions
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16
src/solver/simplifier_solver.cpp
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@ -36,6 +36,7 @@ class simplifier_solver : public solver {
struct dep_expr_state : public dependent_expr_state {
simplifier_solver& s;
model_reconstruction_trail m_reconstruction_trail;
bool m_updated = false;
dep_expr_state(simplifier_solver& s) :dependent_expr_state(s.m), s(s), m_reconstruction_trail(s.m, m_trail) {}
~dep_expr_state() override {}
virtual unsigned qtail() const override { return s.m_fmls.size(); }
@ -43,10 +44,13 @@ class simplifier_solver : public solver {
void update(unsigned i, dependent_expr const& j) override {
SASSERT(j.fml());
check_false(j.fml());
s.m_fmls[i] = j;
s.m_fmls[i] = j;
m_updated = true;
}
void add(dependent_expr const& j) override { check_false(j.fml()); s.m_fmls.push_back(j); }
void add(dependent_expr const& j) override { m_updated = true; check_false(j.fml()); s.m_fmls.push_back(j); }
bool inconsistent() override { return s.m_inconsistent; }
bool updated() override { return m_updated; }
void reset_updated() override { m_updated = false; }
model_reconstruction_trail& model_trail() override { return m_reconstruction_trail; }
std::ostream& display(std::ostream& out) const override {
unsigned i = 0;
@ -77,7 +81,7 @@ class simplifier_solver : public solver {
expr_mark seen;
unsigned j = qhead();
for (unsigned i = qhead(); i < qtail(); ++i) {
expr* f = s.m_fmls[i].fml();
expr* f = s.m_fmls[i].fml(), *g = nullptr;
if (seen.is_marked(f))
continue;
seen.mark(f, true);
@ -89,6 +93,12 @@ class simplifier_solver : public solver {
add(dependent_expr(s.m, arg, nullptr, d));
continue;
}
if (s.m.is_not(f, g) && s.m.is_or(g)) {
auto* d = s.m_fmls[i].dep();
for (expr* arg : *to_app(g))
add(dependent_expr(s.m, mk_not(s.m, arg), nullptr, d));
continue;
}
if (i != j)
s.m_fmls[j] = s.m_fmls[i];
++j;