Goal:
    s' : VSet.t  t0 : VSet.t  a : V.t  H : VSet.In a s'
  ============================
   (VSet.In a (VSet.union t0 s'))


DEBUG:Going to execute:
VSetDecide.MSetDecideAuxiliary.E_eq_to_Logic_eq
DEBUG LTAC Evaluated term: VSet.t
DEBUG LTAC Evaluated term: V.t
Level 1: Backtrace:

Not convertible.
Level 1: Backtrace:

Not convertible.
Level 1: Backtrace:

Not convertible.
Level 0: Backtrace:

No matching clauses for match.