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make simple solver a reference

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2026-03-10 15:10:51 -07:00
parent 3e3c3f106d
commit c98ea6dc21
3 changed files with 8 additions and 22 deletions
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21
src/smt/seq/seq_nielsen.cpp
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@ -241,11 +241,7 @@ namespace seq {
// nielsen_graph
// -----------------------------------------------
nielsen_graph::nielsen_graph(euf::sgraph& sg):
m_sg(sg) {
}
nielsen_graph::nielsen_graph(euf::sgraph& sg, simple_solver* solver):
nielsen_graph::nielsen_graph(euf::sgraph& sg, simple_solver& solver):
m_sg(sg),
m_solver(solver) {
}
@ -2394,20 +2390,13 @@ namespace seq {
if (constraints.empty())
return true; // no integer constraints, trivially feasible
if (!m_solver) {
// No solver provided: skip arithmetic feasibility checking.
// This makes the Nielsen graph unsound with respect to integer constraints
// but is acceptable for contexts (e.g., unit tests) that only exercise
// string equality patterns without arithmetic path constraints.
return true;
}
m_solver->push();
m_solver.push();
for (auto const& ic : constraints)
m_solver->assert_expr(int_constraint_to_expr(ic));
m_solver.assert_expr(int_constraint_to_expr(ic));
lbool result = m_solver->check();
m_solver->pop(1);
lbool result = m_solver.check();
m_solver.pop(1);
return result != l_false;
}