Goal:
  
  G : t
  a : sigma
        (fun index : sigma (fun _ : VSet.t => sigma (fun _ : V.t => V.t)) =>
         SPath (pr1 index) (pr1 (pr2 index)) (pr2 (pr2 index)))
  b : sigma
        (fun index : sigma (fun _ : VSet.t => sigma (fun _ : V.t => V.t)) =>
         SPath (pr1 index) (pr1 (pr2 index)) (pr2 (pr2 index)))
  e : NoConfusion_SPath a b
  ============================
   (noConfusion_SPath_obligation_2 a b (noConfusion_SPath_obligation_1 a b e) =
    e)


DEBUG:Going to execute:
CoreTactics.destruct_sigma a; CoreTactics.destruct_sigma b;
            destruct a; DepElim.depelim b; simpl in * |-;
            CoreTactics.on_last_hyp
             ltac:(fun id =>
                     hnf in id;
                      CoreTactics.destruct_tele_eq id || destruct id)
Level 3: evaluation returns
CoreTactics.destruct_sigma a; CoreTactics.destruct_sigma b; destruct a;
 DepElim.depelim b; simpl in * |-;
 CoreTactics.on_last_hyp
  ltac:(fun id => hnf in id; CoreTactics.destruct_tele_eq id || destruct id);
 (solve [ constructor ])
where
b := b
of type
constr
a := a
of type
constr of type tacvalue