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Proof step 8 from proof validref-put-badarrayfield (previous step)

is_arraytype(st[r0 -- _type] .type), validref(str, r, ty, st) ⊦ fs ' = _type, fs ' = _length, validref(str, r, ty, st[r0 -- fs ', val])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validref(str, r, ty, st) ↔ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)
Proof step 7:
is_arraytype(st[r0 -- _type] .type), validref(str, r, ty, st) ⊦ fs ' = _type, fs ' = _length, r = jvmref ∨ (st[r0 -- fs ', val][r -- _type]) .type ≤ ty ∧ ¬ junkref(str, r, st[r0 -- fs ', val])

Rule argument

[crewrite-arg: validref-def , F , [st, ty, r, str] → [st[r0 -- fs ', val], ty, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r0 -- fs ', val], ty, r, str)]]