/usr/lib/x86_64-linux-gnu/libatk-1.0.so.0 is in libatk1.0-0 2.18.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libatk-1.0.so.0.21809.1
/usr/lib/x86_64-linux-gnu/libatk-1.0.so.0.21809.1