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Proof step 17 from proof isarray-isarrayref (previous step)

st[r -- _type] = typeval(ty0), ty0 = mkarraytype(ty), r ∈ st, okarray(r, ty, st), is_typevalue(st[r -- _type]), r -- _type ∈ st, i ≤ st[r -- _length] .intval ⊦ r = jvmref, is_arrayref(r, i, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 16:
st[r -- _type] = typeval(mkarraytype(ty)), i ≤ st[r -- _length] .intval, r -- _type ∈ st, okarray(r, ty, st), r ∈ st ⊦ r = jvmref, is_arrayref(r, i, st)

Rule argument

[emptyarg]

Additional information

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