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Proof step 13 from proof nosharing-forward (previous step)

st[jvmref -- sks] = refval(r0), st[r -- _type] .type = mkclasstype(class), st[jvmref -- sks0] = refval(r0), fs ' ∈ instfields(class), validrefnotnull(str, r, ty, st), fits(jvmref, sks0, st), fits(jvmref, sks, st) ⊦ r = jvmref, r0 = jvmref, sks = [], sks0 = [], sks0 = sks, is_referencevalue(st[r -- fs '])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ validrefnotnull(str, r, ty, st) ↔ r ≠ jvmref ∧ validref(str, r, ty, st)
Proof step 12:
st[jvmref -- sks] = refval(r0), st[r -- _type] .type = mkclasstype(class), st[jvmref -- sks0] = refval(r0), fs ' ∈ instfields(class), r ≠ jvmref ∧ validref(str, r, ty, st), fits(jvmref, sks0, st), fits(jvmref, sks, st) ⊦ r = jvmref, r0 = jvmref, sks = [], sks0 = [], sks0 = sks, is_referencevalue(st[r -- fs '])

Rule argument

[speclemmaarg: , validrefnotnull(str, r, ty, st) ↔ r ≠ jvmref ∧ validref(str, r, ty, st) ,[st, ty, r, str] → [st, ty, r, str] ,F ,junkrefs , ,validrefnotnull-def ]

Additional information

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