anchor.diff:  
   
   -define(SNAPSHOT_THRESHOLD, 10).
  --define(SNAPSHOT_MIN, 5).
  +-define(SNAPSHOT_MIN, 3).
   -define(OPS_THRESHOLD, 50).
   
   -ifdef(TEST).
  
positive.code: 
  handle_command({store_ss, Key, Snapshot, CommitTime}, _Sender,
                 State = #state{ops_cache = OpsCache, snapshot_cache=SnapshotCache})->
      internal_store_ss(Key,Snapshot,CommitTime,OpsCache,SnapshotCache),
      {noreply, State};
  
  
  
negative.code: 			   SnapshotDictA
  		   end,
      SnapshotDict1=vector_orddict:insert_bigger(CommitTime,Snapshot, SnapshotDict),
      snapshot_insert_gc(Key,SnapshotDict1, SnapshotCache, OpsCache,ShouldGc).
  
  sub_reverse(_List,0,Acc) ->
      Acc;
  