code: def get_unyielding_tcids(log_str):
      
      tcid_strs = re.findall('INFO: \[.*?\].*? - Got no statements for (\d+).*',
                             log_str)
      return {int(tcid_str) for tcid_str in tcid_strs}
docs: Extract the set of tcids for which no statements were created.