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Proof step 2 from proof lastdiv-rew (previous step)

⊦ x = [], ∃ y, a. x = y + a '

User applied rule insert lemma

And obtained the following new goals

Proof step 3:
⊦ x ≠ [] → (∃ y, a. x = y + a ')

Rule argument

spec: list inst: name: lastdiv seq: ⊦ x ≠ [] → (∃ y, a. x = y + a ') subst: [x] → [x] flags: current, []

Additional information

Used terms: x