configuration: CBC
data_file: data/mznc2019/groupsplitter/u12g2pref1.dzn
error: "MiniZinc: internal error: out of memory\nterminate called after throwing an\
  \ instance of 'std::bad_alloc'\n  what():  std::bad_alloc"
model: data/mznc2019/groupsplitter/group.mzn
problem: groupsplitter
status: ERROR