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Proof step 6 from proof ac-okclass (previous step)

⊦ reftypep(refval(r0), st) ∧ (r0 ≠ jvmref → r0 -- _type ∈ addclass(class0, fis, st) ∧ st[r0 -- _type] = typeval(mkclasstype(class1))) ↔ reftypep(refval(r0), st) ∧ (r0 ≠ jvmref → r0 -- _type ∈ st ∧ st[r0 -- _type] = typeval(mkclasstype(class1)))

User applied rule case distinction

And obtained the following new goals

Proof step 5:
⊦ rk ∈ st → rk ∈ addclass(class, fis, st)

Rule argument

[CASEDARG : pos: right 1, ()]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ rk ∈ st → st[rk] = ∅[rk]], [CSIMPSEQ : ⊦ ∅[rk] = noval], [CSIMPSEQ : ⊦ noval ≠ typeval(ty)])]]