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Proof step 17 from proof initval-ref (previous step)

⊦ initial_value(ty) = refval(r) ↔ r = jvmref ∧ (is_reftype(ty) ∨ ty = void_type)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ is_reftype(ty) → initial_value(ty) = refval(jvmref)
Proof step 16:
¬ is_reftype(ty) ⊦ initial_value(ty) = refval(r) ↔ r = jvmref ∧ (is_reftype(ty) ∨ ty = void_type)

Rule argument

[crewrite-arg: initial-value-02, F, [ty] → [ty]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ refval(r) = refval(r0) ↔ r = r0])], [EXTRATERMS : (ty)]]