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Proof step 8 from proof isobj-all (conclusion)

⊦ is_obj(r, class, sks, st) ↔ r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st ∧ (∀ sk. sk ∈ sks → goodfieldandtype(r, sk, st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
⊦ is_obj(r, class, sks, st) ↔ r ≠ jvmref ∧ r -- _type ∈ st ∧ st[r -- _type] = typeval(mkclasstype(class)) ∧ (∀ sk. sk ∈ sks → goodfieldandtype(r, sk, st))

Rule argument

[emptyarg]

Additional information

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