Goal:
  
  G : t
  x : V.t
  s0 : VSet.t
  p : SPath s0 x x
  s' : VSet.t
  Hs : VSet.Equal (VSet.union s0 VSet.empty) s'
  H : 0 < sweight p
  ============================
   (0 < sweight (SPath_sub (simplify_aux1 Hs) p))


DEBUG:Going to execute:
match goal with
           | |- _ -> _ => intro; t_tauto_intuit
           | |- _ => t_reduce; t_solver
           end || t_solver
Level 2: evaluation returns
<coq-core.plugins.tauto::is_disj@0>
where
tauto_flags := 
of type
tauto_flags
X1 := 0 < sweight (SPath_sub (simplify_aux1 Hs) p)
of type
constr of type tacvalue

Level 2: Backtrace:

Tactic failure.
Level 2: Backtrace:

Tactic failure.
Level 1: Backtrace:

Tactic failure.
Level 1: Backtrace:

Tactic failure.
Level 0: Backtrace:

Tactic failure.