begin_version 3 end_version begin_metric 0 end_metric 3 begin_variable var0 -1 2 Atom boarded(p0) NegatedAtom boarded(p0) end_variable begin_variable var1 -1 2 Atom lift-at(f0) Atom lift-at(f1) end_variable begin_variable var2 -1 2 Atom served(p0) NegatedAtom served(p0) end_variable 1 begin_mutex_group 2 1 0 1 1 end_mutex_group begin_state 1 0 1 end_state begin_goal 1 2 0 end_goal 4 begin_operator down f1 f0 0 1 0 1 1 0 1 end_operator begin_operator stop f0 1 1 0 2 0 0 -1 1 1 0 0 2 -1 0 1 end_operator begin_operator stop f1 1 1 1 1 1 2 1 0 -1 0 1 end_operator begin_operator up f0 f1 0 1 0 1 0 1 1 end_operator 0