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Theorem byteval

⊦ 0 ≤ i + i0 ∧ i0 ≤ j ∧ i + j < st[r -- _length] .intval ∧ okarray(r, byte_type, st) → byteval(st[r -- (i + i0) '] .byteval) = st[r -- (i + i0) ']

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: byteval-01,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 6
Used lemmas: oktype-byte, okreftype, okarrayNotNull, okarray-05,
Used spec theorems:
- javavalue/byteval
Used simplifier rules: