Sort u →
  {α : Type} →
    [inst : DecidableEq α] →
      [inst_1 : Hashable α] →
        {decls : Array (Std.Sat.AIG.Decl α)} →
          {idx : ℕ} →
            Std.Sat.AIG.RelabelNat.State α decls idx →
              {α' : Type} →
                [inst' : DecidableEq α'] →
                  [inst'_1 : Hashable α'] →
                    {decls' : Array (Std.Sat.AIG.Decl α')} →
                      {idx' : ℕ} → Std.Sat.AIG.RelabelNat.State α' decls' idx' → Sort u