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Theorem validrefnotnull-isvalidref

str ≠ `java.lang.Object' ⊦ validrefnotnull(str0, r, mkclasstype(((* str)) .class), st) → (is_valid_ref(str0, r, st) ↔ is_obj(str0, r, st))

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 5
Used lemmas: validref-array-03, validrefnotnull-def, validrefnotnull-notnull,
Used spec theorems:
- Used simplifier rules: