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Proof step 17 from proof okbytearray-validref (previous step)

st[r -- _length] = intval(i), st[r -- _type] = typeval(mkarraytype(byte_type)), r -- _type ∈ st, 0 ≤ i, r ∈ st, junkref(str, r, st), is_arrayref(r, i, st), r -- _length ∈ st, ∀ j. ¬ j < 0 ∧ ¬ i ≤ j → is_bytevalue(st[r -- j ']) ⊦ r = jvmref, is_array(r, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 8:
⊦ is_array(r, st) ↔ r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_arraytype(st[r -- _type] .type) ∧ okarray(r, st[r -- _type] .type .type, st)
Proof step 16:
st[r -- _length] = intval(i), st[r -- _type] = typeval(mkarraytype(byte_type)), r -- _type ∈ st, 0 ≤ i, r ∈ st, junkref(str, r, st), is_arrayref(r, i, st), r -- _length ∈ st, ∀ j. ¬ j < 0 ∧ ¬ i ≤ j → is_bytevalue(st[r -- j ']) ⊦ r = jvmref, r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_arraytype(st[r -- _type] .type) ∧ okarray(r, st[r -- _type] .type .type, st)

Rule argument

[speclemmaarg: , is_array(r, st) ↔ r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_arraytype(st[r -- _type] .type) ∧ okarray(r, st[r -- _type] .type .type, st) ,[st, r] → [st, r] ,F ,okfuns , ,is-any-array ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, r)]]