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add checks for flipping externals / assumptions in model converter, fix scc converter bug

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-12-13 14:06:35 -08:00
parent caaad8825d
commit aeabdb4aae
5 changed files with 31 additions and 7 deletions
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2
src/sat/sat_elim_eqs.cpp
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@ -182,7 +182,7 @@ namespace sat {
literal l(v, false);
literal r = roots[v];
SASSERT(v != r.var());
if (m_solver.is_external(v) && !m_solver.set_root(l, r)) {
if (m_solver.is_external(v) || !m_solver.set_root(l, r)) {
// 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);