diff --git a/src/api/api_context.cpp b/src/api/api_context.cpp
index 75782a28d..47a25f313 100644
--- a/src/api/api_context.cpp
+++ b/src/api/api_context.cpp
@@ -76,7 +76,6 @@ namespace api {
         m_sutil(m()),
         m_last_result(m()),
         m_ast_trail(m()),
-        m_replay_stack(),
         m_pmanager(m_limit) {
 
         m_error_code = Z3_OK;
@@ -100,23 +99,12 @@ namespace api {
         m_fpa_fid   = m().mk_family_id("fpa");
         m_seq_fid   = m().mk_family_id("seq");
         m_dt_plugin = static_cast<datatype_decl_plugin*>(m().get_plugin(m_dt_fid));
-
-        if (!m_user_ref_count) {
-            m_replay_stack.push_back(0);
-        }
     
         install_tactics(*this);
     }
 
 
     context::~context() {
-        m_last_obj = 0;
-        if (!m_user_ref_count) {
-            for (unsigned i = 0; i < m_replay_stack.size(); ++i) {
-                dealloc(m_replay_stack[i]);
-            }
-            m_ast_trail.reset();
-        }
         reset_parser();
     }
 
diff --git a/src/api/api_context.h b/src/api/api_context.h
index 23c8d3fd2..de492bb45 100644
--- a/src/api/api_context.h
+++ b/src/api/api_context.h
@@ -68,7 +68,6 @@ namespace api {
         ast_ref_vector             m_last_result; //!< used when m_user_ref_count == true
         ast_ref_vector             m_ast_trail;   //!< used when m_user_ref_count == false
         unsigned_vector            m_ast_lim;
-        ptr_vector<ast_ref_vector> m_replay_stack;
 
         ref<api::object>           m_last_obj; //!< reference to the last API object returned by the APIs