anchor.diff:          , state_tree/1
           , sophia_identity/1
           , sophia_state/1
  +        , create_store/1
  +        , update_store/1
  +        , read_store/1
  +        , store_zero_value/1
  +        , merge_new_zero_value/1
  +        , merge_missing_keys/1
           ]).
   
   -include_lib("common_test/include/ct.hrl").
  
positive.code:     error        = ?call(call_contract, Acc1, Stack, pop, string, {}),
      ok.
  
  
negative.code:     [ {all_tests, [sequence], [ {group, transactions}
                                , {group, state_tree}
                                , {group, sophia}
                                , {group, store}
                                ]}
      , {transactions, [sequence], [ create_contract
                                   , create_contract_negative
  