diff --git a/src/ast/arith_decl_plugin.cpp b/src/ast/arith_decl_plugin.cpp
index 883e004a76a..88fc595243f 100644
--- a/src/ast/arith_decl_plugin.cpp
+++ b/src/ast/arith_decl_plugin.cpp
@@ -447,6 +447,7 @@ app * arith_decl_plugin::mk_numeral(rational const & val, bool is_int) {
     }
     parameter p[2] = { parameter(val), parameter(static_cast<int>(is_int)) };
     func_decl * decl;
+
     if (is_int && !m_convert_int_numerals_to_real)
         decl = m_manager->mk_const_decl(m_intv_sym, m_int_decl, func_decl_info(m_family_id, OP_NUM, 2, p));
     else
diff --git a/src/opt/optsmt.cpp b/src/opt/optsmt.cpp
index 6df7a0acdac..cb4663b35b2 100644
--- a/src/opt/optsmt.cpp
+++ b/src/opt/optsmt.cpp
@@ -181,6 +181,7 @@ namespace opt {
         for (unsigned i = 0; i < obj_index; ++i) {
             commit_assignment(i);
         }
+        m_s->get_model(m_model);
 
         unsigned steps = 0;
         unsigned step_incs = 0;
diff --git a/src/smt/smt_model_checker.cpp b/src/smt/smt_model_checker.cpp
index b68a70989f3..49b8dff2e6e 100644
--- a/src/smt/smt_model_checker.cpp
+++ b/src/smt/smt_model_checker.cpp
@@ -322,12 +322,13 @@ namespace smt {
     /**
        \brief Return true if q is satisfied by m_curr_model.
     */
+
     bool model_checker::check(quantifier * q) {
         SASSERT(!m_aux_context->relevancy());
         scoped_ctx_push _push(m_aux_context.get());
 
         quantifier * flat_q = get_flat_quantifier(q);
-        TRACE("model_checker", tout << "model checking:\n" << expr_ref(q->get_expr(), m) << "\n" << expr_ref(flat_q->get_expr(), m) << "\n";);
+        TRACE("model_checker", tout << "model checking:\n" << expr_ref(flat_q->get_expr(), m) << "\n";);
         expr_ref_vector sks(m);
 
         assert_neg_q_m(flat_q, sks);
diff --git a/src/solver/smt_logics.cpp b/src/solver/smt_logics.cpp
index a8dcf2f904a..811461f6275 100644
--- a/src/solver/smt_logics.cpp
+++ b/src/solver/smt_logics.cpp
@@ -35,6 +35,7 @@ bool smt_logics::logic_has_reals_only(symbol const& s) {
         s == "UFLRA" ||
         s == "LRA" ||
         s == "RDL" ||
+        s == "NRA" ||
         s == "QF_NRA" ||
         s == "QF_UFNRA" ||
         s == "QF_UFLRA";
diff --git a/src/tactic/smtlogics/nra_tactic.cpp b/src/tactic/smtlogics/nra_tactic.cpp
index 8aefad0a03e..7d3a170edc1 100644
--- a/src/tactic/smtlogics/nra_tactic.cpp
+++ b/src/tactic/smtlogics/nra_tactic.cpp
@@ -39,6 +39,7 @@ tactic * mk_nra_tactic(ast_manager & m, params_ref const& p) {
         mk_simplify_tactic(m, p),
         mk_propagate_values_tactic(m, p),
         mk_qe_lite_tactic(m),
+        mk_simplify_tactic(m, p),
         cond(mk_is_qfnra_probe(),
              or_else(try_for(mk_qfnra_nlsat_tactic(m, p), 5000),
                      try_for(mk_qfnra_nlsat_tactic(m, p1), 10000),