/lib/x86_64-linux-gnu/libpci.so.3 is in libpci3 1:3.3.1-1.1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libpci.so.3.3.1
/lib/x86_64-linux-gnu/libpci.so.3.3.1