https://app.circleci.com/pipelines/github/checkstyle/checkstyle/41538/workflows/d00b5d3f-6794-4061-aa46-4083806bdfde/jobs/1309693

But there were a lot examples that this tool takes too much time to finish.

For now we presume that it simply needs more time.
So we can split this job into two parts to let finish on time, 15 minutes max