[copied from UNIT_TESTER/run/syncroot/1/ref.tree
changed half of node names
=> partly overlaps with tosync.tree (and ref.tree)
   and with disjunct.tree
]
(
  (
    C:0.10000,
    (
      A:0.10000,
      B:0.10000
    ):0.15000
  )33:0.10000,
  (
    G:0.10000,
    (
      H:0.10000,
      I:0.10000
    )56:0.10000
  )33:0.10000
);