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Theorem ll-trav1-end

r1 ≠ null ⊦ h(r1) = a × null → ((ll-trav(r0, r1, x) * hP)(h) ↔ x ≠ [] ∧ (∃ y. x = y + a ∧ (lls(r0, r1, y) * r1 => a × null * hP)(h)))

Type: A user defined theorem
Validity: The proof is valid.
Features: as,
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

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Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 9
Used lemmas: lls-one, lls-null, lls-rec, lls-base, ll-trav1-def,
Used spec theorems:
- Used simplifier rules: