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Proof step 5 from proof validrefnotnull-addobj (previous step)

newref(r1, st), validrefnotnull(str, r, ty1, st) ⊦ r1 = jvmref, validref(str, r, ty1, addobj(r1, class, fis, st))

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ validrefnotnull(str, r, ty, st) ↔ r ≠ jvmref ∧ validref(str, r, ty, st)
Proof step 4:
⊦ newref(r1, st) ∧ validref(str, r, ty1, st) → validref(str, r, ty1, addobj(r1, class, fis, st))

Rule argument

[crewrite-arg: validrefnotnull-def , F , [st, ty, r, str] → [st, ty1, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, ty1, r, str)]]