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Theorem validref-is-junk

⊦ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty) → ¬ validref(str, r, ty, st)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: valid-typeex, validfieldinits-def-01, validref-array-01, validref-array-02, validref-array-notin, validref-arrayreftype, validref-bad-type, validref-class-rec-better, validref-forward-array, validref-intarray-put, validref-intarray-put-01, validref-is-junk-better, validref-isarray, validref-isarrayref, validref-no-obj, validref-no-type, validref-not-tdnameex, validref-okarray, validref-type, validref-typele, validref-voidtype, validreflist-no-reftype, validrefnotnull-isarray,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 2
Used lemmas: junkref-not-valid-01, validref-def,
Used spec theorems:
- Used simplifier rules: