This file is indexed.

/usr/lib/x86_64-linux-gnu/libcilkrts.so.5 is in libcilkrts5 6.3.0-18+deb9u1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/x86_64-linux-gnu/libcilkrts.so.5.0.0