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disable bdd variable elimination

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-03-31 17:05:22 -07:00
parent 55eb11d91b
commit 528dc8a3f8
10 changed files with 58 additions and 32 deletions
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2
src/sat/sat_elim_eqs.cpp
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@ -199,7 +199,7 @@ namespace sat {
literal r = roots[v];
SASSERT(v != r.var());
bool root_ok = !m_solver.is_external(v) || m_solver.set_root(l, r);
if (m_solver.is_external(v) && (m_solver.is_incremental() || !root_ok)) {
if (m_solver.is_assumption(v) || (m_solver.is_external(v) && (m_solver.is_incremental() || !root_ok))) {
// cannot really eliminate v, since we have to notify extension of future assignments
m_solver.mk_bin_clause(~l, r, false);
m_solver.mk_bin_clause(l, ~r, false);