/usr/lib/ is in startactive-data 1:0.4-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/systemd/
/usr/lib/systemd/user/
/usr/lib/systemd/user/nepomuk.service
/usr/lib/systemd/user/ksmserver.service
/usr/lib/systemd/user/kdeinit.service
/usr/lib/systemd/user/lnusertemp-cache.service
/usr/lib/systemd/user/startactive.service
/usr/lib/systemd/user/setup-kde-skel.service
/usr/lib/systemd/user/plasma-device.service
/usr/lib/systemd/user/active.target
/usr/lib/systemd/user/activitymanager.service
/usr/lib/systemd/user/lnusertemp-socket.service
/usr/lib/systemd/user/contour.service
/usr/lib/systemd/user/lnusertemp-tmp.service