simp [εStep, nlt] at step
case mpr.step.isFalse
i✝ i' : ℕ
nfa : NFA
i j k : ℕ
step : j ∈ nfa.εStep i
rest✝ : nfa.εClosure j k
ih : nfa.pathIn 0 j k []
nlt : ¬i < nfa.nodes.size
⊢ nfa.pathIn 0 i k []
no goals