diff --git a/src/opt/opt_context.cpp b/src/opt/opt_context.cpp
index cd40944b2..d1b7a489e 100644
--- a/src/opt/opt_context.cpp
+++ b/src/opt/opt_context.cpp
@@ -273,7 +273,8 @@ namespace opt {
         display_benchmark();
         IF_VERBOSE(1, verbose_stream() << "(optimize:check-sat)\n";);
         lbool is_sat = s.check_sat(0,0);
-        TRACE("opt", tout << "initial search result: " << is_sat << "\n";);
+        TRACE("opt", tout << "initial search result: " << is_sat << "\n";
+              s.display(tout););
         if (is_sat != l_false) {
             s.get_model(m_model);
             s.get_labels(m_labels);
@@ -1037,6 +1038,10 @@ namespace opt {
             TRACE("opt", tout << "Purifying " << term << "\n";);
             term = purify(fm, term);
         }
+        else if (m.is_ite(term)) {
+            TRACE("opt", tout << "Purifying " << term << "\n";);
+            term = purify(fm, term);
+        }
         if (fm) {
             m_model_converter = concat(m_model_converter.get(), fm.get());
         }
diff --git a/src/smt/theory_dense_diff_logic_def.h b/src/smt/theory_dense_diff_logic_def.h
index ed94ee62c..addb5d92b 100644
--- a/src/smt/theory_dense_diff_logic_def.h
+++ b/src/smt/theory_dense_diff_logic_def.h
@@ -868,7 +868,8 @@ namespace smt {
                 e = ctx.get_enode(to_app(n));                
             }
             else {
-                e = ctx.mk_enode(to_app(n), false, false, true);
+                ctx.internalize(n, false);
+                e = ctx.get_enode(n);
             }            
             v = e->get_th_var(get_id());
             if (v == null_theory_var) {
@@ -1008,7 +1009,8 @@ namespace smt {
             inf_eps result(rational(0), r);
             blocker = mk_gt(v, result);
             IF_VERBOSE(10, verbose_stream() << blocker << "\n";);
-            return result;
+            r += m_objective_consts[v];
+            return inf_eps(rational(0), r);
         }
         default:
             TRACE("opt", tout << "unbounded\n"; );