/usr/lib/x86_64-linux-gnu/libspice-server.so.1 is in libspice-server1 0.12.8-2.1+deb9u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libspice-server.so.1.10.1
/usr/lib/x86_64-linux-gnu/libspice-server.so.1.10.1