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Proof step 8 from proof union-init (previous step)

⊦ (st0[jvmref -- mkfs(class, void_type, `initstate' .field) '] ≠ initval(error) ∨ ¬ jvmref -- mkfs(class, void_type, `initstate' .field) ' ∈ st0) ∧ ¬ initundone(class, st0) ↔ ¬ initerror(class, st0) ∧ ¬ initundone(class, st0), jvmref ∈ st, jvmref -- mkfs(class, void_type, `initstate' .field) ' ∈ st

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 7:
⊦ initerror(class1, st) ↔ (jvmref -- mkfs(class1, void_type, `initstate' .field) ') × initval(error) ∈ st

Rule argument

[speclemmaarg: , initerror(class1, st) ↔ (jvmref -- mkfs(class1, void_type, `initstate' .field) ') × initval(error) ∈ st ,[st, class1] → [st0, class] ,F ,storefuns , ,initerror ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ rk × val ∈ st ↔ rk ∈ st ∧ st[rk] = val], [CSIMPSEQ : ⊦ rk × val ∈ st ↔ ¬ ¬ (rk ∈ st ∧ st[rk] = val)])], [EXTRATERMS : (st0, class)]]