/usr/lib/x86_64-linux-gnu/libnemesis.so is in libexodusii-dev 6.02.dfsg.1-6.1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libnemesis.so.3.09.0
/usr/lib/x86_64-linux-gnu/libnemesis.so.3.09.0