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fix bug reported on stackoverflow on crash for unconstrained variables

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2014-11-05 13:51:27 +01:00
parent 0e83a2b1af
commit 444879db5f
2 changed files with 7 additions and 1 deletions
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7
src/opt/opt_solver.cpp
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@ -87,8 +87,13 @@ namespace opt {
smt::theory_opt& opt_solver::get_optimizer() {
smt::context& ctx = m_context.get_context();
smt::theory_id arith_id = m_context.m().get_family_id("arith");
smt::theory* arith_theory = ctx.get_theory(arith_id);
smt::theory* arith_theory = ctx.get_theory(arith_id);
if (!arith_theory) {
ctx.register_plugin(alloc(smt::theory_mi_arith, m, m_params));
arith_theory = ctx.get_theory(arith_id);
SASSERT(arith_theory);
}
if (typeid(smt::theory_mi_arith) == typeid(*arith_theory)) {
return dynamic_cast<smt::theory_mi_arith&>(*arith_theory);
}

1
src/smt/theory_arith_core.h
View file

@ -870,6 +870,7 @@ namespace smt {
atom_kind kind2 = a2->get_atom_kind();
bool v_is_int = is_int(v);
SASSERT(v == a2->get_var());
if (k1 == k2 && kind1 == kind2) return;
SASSERT(k1 != k2 || kind1 != kind2);
parameter coeffs[3] = { parameter(symbol("farkas")),
parameter(rational(1)), parameter(rational(1)) };