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Proof step 19 from proof isobj-addobj-01 (previous step)

is_obj(r, class, st), newref(r0, st) ⊦ r0 = jvmref, is_obj(r, class, addobj(r0, class0, fis, st))

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ is_obj(r, class, st) ↔ r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st ∧ goodfieldsandtypes(r, instfields(class), st)
Proof step 18:
r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st ∧ goodfieldsandtypes(r, instfields(class), st), newref(r0, st) ⊦ r0 = jvmref, is_obj(r, class, addobj(r0, class0, fis, st))

Rule argument

[crewrite-arg: is_obj-def, F, [st, class, r] → [st, class, r]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, class, r)]]