diff --git a/src/smt/smt_model_checker.cpp b/src/smt/smt_model_checker.cpp
index 7053d63ec..163003c01 100644
--- a/src/smt/smt_model_checker.cpp
+++ b/src/smt/smt_model_checker.cpp
@@ -282,6 +282,7 @@ namespace smt {
         if (!m_fparams) {
             m_fparams = alloc(smt_params, m_context->get_fparams());
             m_fparams->m_relevancy_lvl = 0; // no relevancy since the model checking problems are quantifier free
+            m_fparams->m_case_split_strategy = CS_ACTIVITY; // avoid warning messages about smt.case_split >= 3.
         }
         if (!m_aux_context) {
             symbol logic;