diff --git a/src/smt/theory_lra.cpp b/src/smt/theory_lra.cpp
index 74df2c20d..4508511b1 100644
--- a/src/smt/theory_lra.cpp
+++ b/src/smt/theory_lra.cpp
@@ -2199,11 +2199,13 @@ public:
         switch (r) {
         case l_false: {
             m_stats.m_nla_lemmas += lv.size();
+            int i = 0;
             for(const nla::lemma & l : lv) {
                 m_lemma = l; //todo avoid the copy
                 m_explanation = l.expl();
                 m_stats.m_nla_explanations += static_cast<unsigned>(l.expl().size());
                 false_case_of_check_nla();
+                i++;
             }
             break;
         }