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Proof step 10 from proof isarray-union (previous step)

st[r -- _type] .type = mkarraytype(ty), r -- _type ∈ st, is_typevalue(st[r -- _type]), is_arraytype(st[r -- _type] .type), okarray(r, ty, st), r ∈ st ⊦ r = jvmref, is_array(r, st0 ∪ st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 9:
st[r -- _type] .type = mkarraytype(ty), r ∈ st, okarray(r, ty, st), is_typevalue(st[r -- _type]), r -- _type ∈ st ⊦ r = jvmref, is_array(r, st0 ∪ st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_arraytype(mkarraytype(ty))])]]