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Theorem validref-class

⊦ r ≠ jvmref ∧ st[r -- _type] .type = mkclasstype(class) ∧ (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ (is_reftype(fs .type) ∨ fs .type = abstract_type) ∧ st[r -- fs '] .refval ≠ jvmref ∧ (¬ is_referencevalue(st[r -- fs ']) ∨ ¬ st[r -- (fs ' + _type)] .type ≤ fs .type ∨ ¬ validref(str, st[r -- fs '] .refval, fs .type, st))) → ¬ validref(str, r, ty, st)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 6
Proof steps: 16
Used lemmas: junkref-class-01, junkref-is-junk, validref-def,
Used spec theorems:
- storefuns/lookup-two
Used simplifier rules: