Strictly equal file coverage:
  subdir/A/C/D/File6.cpp
  subdir/A/C/file5.cpp
  subdir/A/File2.cpp
  subdir/A/File4.cpp
  subdir/A/file1.cpp
  subdir/A/file3.cpp
  subdir/A/file7.cpp
  subdir/B/main.cpp
