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Proof step 6 from proof isarray-union (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
st[r -- _type] = typeval(mkarraytype(ty)), r ∈ st, okarray(r, ty, st), r -- _type ∈ st ⊦ r = jvmref, okarray(r, ty, st0 ∪ st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ mkarraytype(ty) .type = ty], [CSIMPSEQ : ⊦ is_arraytype(mkarraytype(ty))], [CSIMPSEQ : ⊦ typeval(ty) .type = ty], [CSIMPSEQ : ⊦ is_typevalue(typeval(ty))], [CSIMPSEQ : ⊦ rk ∈ st0 → (st ∪ st0)[rk] = st0[rk]], [CSIMPSEQ : ⊦ rk ∈ st ∪ st0 ↔ rk ∈ st ∨ rk ∈ st0])]]