/usr/lib/libkwinactiveeffects.so.1abi3 is in libkwinactiveeffects1abi3 4:4.8.5-0ubuntu0.4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libkwinactiveeffects.so.1.0.0.abi3
/usr/lib/libkwinactiveeffects.so.1.0.0.abi3