Well, I have proceeded to uninstallation with pip of my torch 1.3.0 version, then I have used conda to install a fresh pytorch version (1.3.1). It comes with some updates of other packages mkl 2019.4-243 and other mkl stuff as well as others (numpy,…) and also python 3.6.5 to 3.7.5  but at the end my segfault.py script works !!! incredible.
I think I can close the thread and thank you very much.