case star β =>
  simp
  sorry
α : Program
φ✝ : Formula
E : List Formula
E_in : E ∈ unfoldBox α φ✝
φ : Formula
β : Program
y_in_E : (⌈∗β⌉φ) ∈ E
⊢ lmOfFormula (⌈∗β⌉φ) < lmOfProgram α + lmOfFormula φ✝
no goals