/usr/lib/x86_64-linux-gnu/libvaladoc.so.3 is in libvaladoc3 0.30.0~git20160518-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libvaladoc.so.3.0.0
/usr/lib/x86_64-linux-gnu/libvaladoc.so.3.0.0