Goal:
    x : V.t  p : VSet.t  a : V.t  H : VSet.In a p -> False  H1 : VSet.In a p
  ============================
   False


DEBUG:Going to execute:
F x2 x1 x0
Level 4: evaluation returns
<coq-core.plugins.tauto::find_cut@0>
where
k := fun id0 id1 X2 => assert X2; [ exact (id0 id1) | clear id0 ]
     where
     flags := 
     of type
     tauto_flags
of type
tacvalue of type tacvalue