segfault after 1020 simulations in Python 3 (but not Python 2)

[gerrer@…]

I export a very simple model (3 equations) as FMU in order to simulate it with Python 2000 times.
It worked using Python 2, but not anymore using Python 3.

ipbd indicates error happens at fmu2instantiate, but the simulation library FMPy only forwards the memory management calls to the native functions of the OS.