Is it permissible to include the name of the second supervisor—who did not contribute to the research—on the thesis, knowing that not mentioning his name would be considered an insult to him?

If the university obliges the professor to supervise the thesis, the student must include his name, even if he did not benefit from him, especially if the lack of benefit was due to the student's negligence or his reliance on another supervisor. The supervisor deserves remuneration as long as he dedicated himself to the work and did not refuse assistance. However, if the deficiency was from the supervising doctor, there is no harm for the student in adhering to university regulations and including his name.