map = isl_map_detect_equalities(map);
affine_hull = isl_map_affine_hull(isl_map_copy(map));
map = isl_map_align_divs(map);
- model = isl_basic_map_copy(map->p[0]);
+ model = map ? isl_basic_map_copy(map->p[0]) : NULL;
set = isl_map_underlying_set(map);