/usr/include/gecode/search/ is in libgecode-dev 3.7.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/gecode/search/bab.hpp
/usr/include/gecode/search/dfs.hpp
/usr/include/gecode/search/options.hpp
/usr/include/gecode/search/parallel/
/usr/include/gecode/search/parallel/bab.hh
/usr/include/gecode/search/parallel/dfs.hh
/usr/include/gecode/search/parallel/engine.hh
/usr/include/gecode/search/parallel/path.hh
/usr/include/gecode/search/parallel/restart.hh
/usr/include/gecode/search/restart.hpp
/usr/include/gecode/search/sequential/
/usr/include/gecode/search/sequential/bab.hh
/usr/include/gecode/search/sequential/dfs.hh
/usr/include/gecode/search/sequential/path.hh
/usr/include/gecode/search/sequential/restart.hh
/usr/include/gecode/search/statistics.hpp
/usr/include/gecode/search/stop.hpp
/usr/include/gecode/search/support.hh
/usr/include/gecode/search/worker.hh