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Proof step 10 from proof is_valid_ref-primarray (previous step)

st[r -- _type] = typeval(mkarraytype(ty)), is_primtype(ty) ⊦ is_valid_ref(r, st) ∧ ( class+∃(str, mkarraytype(ty) .class) ∧ ¬ is_abstract(mkarraytype(ty) .class) ∧ is_obj(r, st) ∨ type∃(str, ty) ∧ ty .jtelemtype ≠ void_type ∧ ty .jtelemtype ≠ abstract_type ∧ is_array(r, st)) ↔ is_array(r, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ is_valid_ref(r, st) ↔ is_obj(r, st) ∨ is_array(r, st)
Proof step 9:
st[r -- _type] = typeval(mkarraytype(ty)), is_primtype(ty) ⊦ (is_obj(r, st) ∨ is_array(r, st)) ∧ ( class+∃(str, mkarraytype(ty) .class) ∧ ¬ is_abstract(mkarraytype(ty) .class) ∧ is_obj(r, st) ∨ type∃(str, ty) ∧ ty .jtelemtype ≠ void_type ∧ ty .jtelemtype ≠ abstract_type ∧ is_array(r, st)) ↔ is_array(r, st)

Rule argument

[crewrite-arg: is-valid-ref, F, [st, r] → [st, r]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, r)]]