diff --git a/src/smt/theory_arith_core.h b/src/smt/theory_arith_core.h
index 01eb8a3d4a8..54f61a09aba 100644
--- a/src/smt/theory_arith_core.h
+++ b/src/smt/theory_arith_core.h
@@ -2943,29 +2943,9 @@ namespace smt {
         context & ctx = get_context();
         if (dump_lemmas()) {
             TRACE("arith", ante.display(tout) << " --> "; ctx.display_detailed_literal(tout, l); tout << "\n";);
-            unsigned id = ctx.display_lemma_as_smt_problem(ante.lits().size(), ante.lits().c_ptr(),
+            ctx.display_lemma_as_smt_problem(ante.lits().size(), ante.lits().c_ptr(),
                                              ante.eqs().size(), ante.eqs().c_ptr(), l);
 
-#if 1
-            if (id == 394) {
-                enable_trace("sign_row_conflict");
-                enable_trace("nl_arith_bug");
-                enable_trace("nl_evaluate");
-                enable_trace("propagate_bounds");
-                enable_trace("propagate_bounds_bug");
-                enable_trace("arith_conflict");
-                enable_trace("non_linear");
-                enable_trace("non_linear_bug");
-            }
-            SASSERT(id != 395);
-            if (id == 396) {
-                disable_trace("nl_arith_bug");
-                disable_trace("propagate_bounds");
-                disable_trace("arith_conflict");
-                disable_trace("non_linear");
-                disable_trace("non_linear_bug");
-            }
-#endif
         }
     }
 
@@ -2973,28 +2953,8 @@ namespace smt {
     void theory_arith<Ext>::dump_lemmas(literal l, derived_bound const& ante) {
         context & ctx = get_context();
         if (dump_lemmas()) {
-            unsigned id = ctx.display_lemma_as_smt_problem(ante.lits().size(), ante.lits().c_ptr(),
+            ctx.display_lemma_as_smt_problem(ante.lits().size(), ante.lits().c_ptr(),
                                              ante.eqs().size(), ante.eqs().c_ptr(), l);
-#if 1
-            if (id == 394) {
-                enable_trace("nl_arith_bug");
-                enable_trace("nl_evaluate");
-                enable_trace("propagate_bounds");
-                enable_trace("arith_conflict");
-                enable_trace("propagate_bounds_bug");
-                enable_trace("non_linear");
-                enable_trace("non_linear_bug");
-            }
-            SASSERT(id != 395);
-            if (id == 396) {
-                enable_trace("sign_row_conflict");
-                disable_trace("nl_arith_bug");
-                disable_trace("propagate_bounds");
-                disable_trace("arith_conflict");
-                disable_trace("non_linear");
-                disable_trace("non_linear_bug");
-            }
-#endif
         }
     }
 
diff --git a/src/smt/theory_bv.cpp b/src/smt/theory_bv.cpp
index 261881a3b34..a0c62b95981 100644
--- a/src/smt/theory_bv.cpp
+++ b/src/smt/theory_bv.cpp
@@ -161,6 +161,8 @@ namespace smt {
         theory_var v = n->get_th_var(get_id());
         if (v == null_theory_var) {
             v = mk_var(n);
+        }
+        if (m_bits[v].empty()) {
             mk_bits(v);
         }
         return v;
diff --git a/src/smt/theory_seq.cpp b/src/smt/theory_seq.cpp
index 4c0e9b87d7b..d6937aa7922 100644
--- a/src/smt/theory_seq.cpp
+++ b/src/smt/theory_seq.cpp
@@ -5163,7 +5163,8 @@ void theory_seq::assign_eh(bool_var v, bool is_true) {
     }
     else if (m_util.str.is_contains(e, e1, e2)) {
         expr_ref_vector disj(m);
-        if (m_seq_rewrite.reduce_contains(e1, e2, disj)) {
+        // disabled pending regression on issue 1196
+        if (false && m_seq_rewrite.reduce_contains(e1, e2, disj)) {
             literal_vector lits;
             literal lit = mk_literal(e);
             lits.push_back(~lit);