This file is indexed.

/usr/lib/x86_64-linux-gnu/libsynctex.so is in libsynctex-dev 2017.20170613.44572-8build1.

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

It is a symlink to /usr/lib/x86_64-linux-gnu/libsynctex.so.1.18.0