Goal:
    G : t  x : V.t  i : V.t  source_vertex0 : VSet.In (s G) (V G)
  ============================
   True


DEBUG:Going to execute:
f x
Level 5: evaluation returns
<coq-core.plugins.tauto::with_uniform_flags@0>
where
f := fun flags => <Coq.Init.Tauto.intuition_gen> flags tac
     where
     tac := progress VSetDecide.MSetDecideAuxiliary.substMSet; intuition
             VSetDecide.MSetDecideAuxiliary.fsetdec_rec
     of type
     tacvalue
of type
tacvalue of type tacvalue

Level 4: evaluation returns
<coq-core.plugins.tauto::with_uniform_flags@0>
where
f := fun flags => <Coq.Init.Tauto.intuition_gen> flags tac
     where
     tac := progress VSetDecide.MSetDecideAuxiliary.substMSet; intuition
             VSetDecide.MSetDecideAuxiliary.fsetdec_rec
     of type
     tacvalue
of type
tacvalue of type tacvalue