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Theorem dlls-last-head-null

⊦ dlls(null, lst, prv, nxt, x) = (emp ∧ ⌜nxt = null⌝ ∧ ⌜lst = prv⌝ ∧ ⌜x = []⌝ )

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by: dll-trav-end, dll-trav-next,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: dlls-last-rec, dlls-last-base,
Used spec theorems:
- Used simplifier rules: