diff --git a/src/smt/tactic/smt_tactic.cpp b/src/smt/tactic/smt_tactic.cpp
index ee3171d03..127595e9e 100644
--- a/src/smt/tactic/smt_tactic.cpp
+++ b/src/smt/tactic/smt_tactic.cpp
@@ -229,26 +229,8 @@ public:
                     pr = m_ctx->get_proof();
                 if (in->unsat_core_enabled()) {
                     unsigned sz = m_ctx->get_unsat_core_size();
-                    expr_ref_vector _core(m);
-                    for (unsigned i = 0; i < sz; ++i) {
-                        _core.push_back(m_ctx->get_unsat_core_expr(i));
-                    }
-                    if (sz > 0 && smt_params_helper(m_params_ref).core_minimize()) {
-                        std::cout << "size1 " << sz << " " << clauses << "\n";
-                        ref<solver> slv = mk_smt_solver(m, m_params_ref, m_logic);
-                        slv->assert_expr(clauses);
-                        mus mus(*slv.get());
-                        mus.add_soft(_core.size(), _core.c_ptr());
-                        lbool got_core = mus.get_mus(_core);
-                        sz = _core.size();
-                        std::cout << "size2 " << sz << "\n";
-                        if (got_core != l_true) {
-                            r = l_undef;
-                            goto undef_case;
-                        }
-                    }
                     for (unsigned i = 0; i < sz; i++) {
-                        expr * b = _core[i].get();
+                        expr * b = m_ctx->get_unsat_core_expr(i);
                         SASSERT(is_uninterp_const(b) && m.is_bool(b));
                         expr * d = bool2dep.find(b);
                         lcore = m.mk_join(lcore, m.mk_leaf(d));