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Theorem unchanged-validref

⊦ validref(str, r, ty, st) ∧ unchanged(str, r, st, st1) → validref(str, r, ty, st1)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 5
Proof steps: 10
Used lemmas: unchanged-type-01, unchanged-junkref,
Used spec theorems:
- junkrefs/validref-def
Used simplifier rules:
- junkrefs/junkref-not-valid-01