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Proof step 16 from proof isobj-del-01 (previous step)

⊦ r = r0, r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st -- r0 ∧ goodfieldsandtypes(r, instfields(class), st -- r0) ↔ is_obj(r, class, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 15:
⊦ r = r0, r ≠ jvmref ∧ r -- _type ∈ st ∧ st[r -- _type] = typeval(mkclasstype(class)) ∧ goodfieldsandtypes(r, instfields(class), st -- r0) ↔ is_obj(r, class, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r ≠ r0 → (st -- r)[r0 -- sk0] = st[r0 -- sk0]], [CSIMPSEQ : ⊦ r -- sk ∈ st -- r0 ↔ r ≠ r0 ∧ r -- sk ∈ st], [CSIMPSEQ : ⊦ rk × val ∈ st ↔ rk ∈ st ∧ st[rk] = val])]]