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Theorem validrefnotnull-is-junk

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

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

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Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: validref-is-junk-better, validrefnotnull-def, validrefnotnull-notnull, validrefnotnull-null,
Used spec theorems:
- Used simplifier rules: