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Proof step 8 from proof validrefkeynotnull-addobj (previous step)

newref(r1, st), validrefkeynotnull(str, rk, ty1, st) ⊦ r1 = jvmref, validrefkeynotnull(str, rk, ty1, addobj(r1, class, fis, st))

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validrefkeynotnull(str, rk, ty, st) ↔ rk ∈ st ∧ validrefvalnotnull(str, st[rk], ty, st)
Proof step 7:
newref(r1, st), rk ∈ st ∧ validrefvalnotnull(str, st[rk], ty1, st) ⊦ r1 = jvmref, validrefkeynotnull(str, rk, ty1, addobj(r1, class, fis, st))

Rule argument

[crewrite-arg: validrefkeynotnull-def , F , [st, ty, rk, str] → [st, ty1, rk, str] ]

Additional information

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