linarith
case inr.inr
γ : Program
δ : List Program
γ_in : γ ∈ δ
α β : Program
ℓ : TP (α⋓β)
δ_in : δ ∈ P α fun τ => ℓ ⟨↑τ, ⋯⟩
IH : lengthOfProgram γ < lengthOfProgram α
h✝¹ : isAtomic α = false
h✝ : isStar α = false
⊢ lengthOfProgram γ < 1 + lengthOfProgram α + lengthOfProgram β
no goals