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Proof step 18 from proof isarray-keyin (previous step)

st[r0 -- _type] = typeval(ty0), st[r -- sk] = refval(r0), ty0 = mkarraytype(ty), r0 ∈ st, okarray(r0, ty, st), is_typevalue(st[r0 -- _type]), r0 -- _type ∈ st, i < st[r -- (sk ' + _length ')] .intval, 0 ≤ i, 0 < st[r -- (sk ' + _length ')] .intval ⊦ r0 = jvmref, r0 -- i ' ∈ st

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 17:
st[r -- sk] = refval(r0), st[r0 -- _type] = typeval(mkarraytype(ty)), 0 < st[r -- (sk ' + _length ')] .intval, 0 ≤ i, i < st[r -- (sk ' + _length ')] .intval, r0 -- _type ∈ st, okarray(r0, ty, st), r0 ∈ st ⊦ r0 = jvmref, r0 -- i ' ∈ st

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_typevalue(typeval(ty))])]]