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Proof step 8 from proof validrefkeynotnull-statfield-intersect (previous step)

st .refs ∩ st1 .refs = ∅, st[jvmref -- fs '] = refval(r), jvmref -- fs ' ∈ st, validrefnotnull(str, r, ty, st), jvmref ∈ st1, jvmref ∈ 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 7:
st .refs ∩ st1 .refs = ∅, st[jvmref -- fs '] = refval(r), jvmref -- fs ' ∈ st, r ≠ jvmref ∧ validref(str, r, ty, st), jvmref ∈ st1, jvmref ∈ st ⊦

Rule argument

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

Additional information

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