/usr/include/gecode/iter/ is in libgecode-dev 5.1.0-2build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/gecode/iter/ranges-add.hpp
/usr/include/gecode/iter/ranges-append.hpp
/usr/include/gecode/iter/ranges-array.hpp
/usr/include/gecode/iter/ranges-cache.hpp
/usr/include/gecode/iter/ranges-compl.hpp
/usr/include/gecode/iter/ranges-diff.hpp
/usr/include/gecode/iter/ranges-empty.hpp
/usr/include/gecode/iter/ranges-inter.hpp
/usr/include/gecode/iter/ranges-list.hpp
/usr/include/gecode/iter/ranges-map.hpp
/usr/include/gecode/iter/ranges-minmax.hpp
/usr/include/gecode/iter/ranges-minus.hpp
/usr/include/gecode/iter/ranges-negative.hpp
/usr/include/gecode/iter/ranges-offset.hpp
/usr/include/gecode/iter/ranges-operations.hpp
/usr/include/gecode/iter/ranges-positive.hpp
/usr/include/gecode/iter/ranges-rangelist.hpp
/usr/include/gecode/iter/ranges-scale.hpp
/usr/include/gecode/iter/ranges-singleton-append.hpp
/usr/include/gecode/iter/ranges-singleton.hpp
/usr/include/gecode/iter/ranges-size.hpp
/usr/include/gecode/iter/ranges-union.hpp
/usr/include/gecode/iter/ranges-values.hpp
/usr/include/gecode/iter/values-array.hpp
/usr/include/gecode/iter/values-bitset.hpp
/usr/include/gecode/iter/values-bitsetoffset.hpp
/usr/include/gecode/iter/values-inter.hpp
/usr/include/gecode/iter/values-list.hpp
/usr/include/gecode/iter/values-map.hpp
/usr/include/gecode/iter/values-minus.hpp
/usr/include/gecode/iter/values-negative.hpp
/usr/include/gecode/iter/values-offset.hpp
/usr/include/gecode/iter/values-positive.hpp
/usr/include/gecode/iter/values-ranges.hpp
/usr/include/gecode/iter/values-singleton.hpp
/usr/include/gecode/iter/values-union.hpp
/usr/include/gecode/iter/values-unique.hpp