# if re.search('unknown datatype', output) or re.search('has to be a non-negative integer', output) or re.search('must use equal type signatures', output):
# return 'conflicting roots'
# if re.search('MUST_ERROR_COMM', output):
# return 'error communicator'
# if re.search('MUST_ERROR_COLLECTIVE_(.*)_MISMATCH', output):