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Theorem unchanged-junkref

⊦ ¬ junkref(str, r, st) ∧ unchanged(str, r, st, st1) → ¬ junkref(str, r, st1)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 6
Proof steps: 14
Used lemmas: unchanged-type-01, unchanged-junkrefs,
Used spec theorems:
- junkrefs/junkref-def
- junkrefs/junkrefs-is-junk
Used simplifier rules:
- junkrefs/junkrefs-sametype
- junkrefs/junkrefs-null-02
- list/references/c-08
- list/references/e
- list/references/app-02-ant
- list/references/a
- list/references/e-01
- list/references/c
- list-data/references/elim-list-c