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Proof step 21 from proof junkrefs-null-01 (previous step)

mkfs(class, ty1, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_referencevalue(st[r -- mkfs(class, ty1, fieldvar) ']), junkrefs(str, st[r -- mkfs(class, ty1, fieldvar) '] .refval ' + refs, ty1, st), st[r -- _type] .type ≤ ty, is_obj(str, r, st), ∀ str0, refs1, ty0, st0. junkrefs(str0, (st[r -- mkfs(class, ty1, fieldvar) '] .refval ' + refs) + jvmref ' + refs1, ty0, st0) ↔ junkrefs(str0, st[r -- mkfs(class, ty1, fieldvar) '] .refval ' + refs, ty0, st0) ⊦ r = jvmref, ∃ fs0. fs0 ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs0 ']) ∧ st[r -- mkfs(class, ty1, fieldvar) '] .refval = st[r -- fs0 '] .refval ∧ junkrefs(str, (st[r -- fs0 '] .refval ' + refs) + jvmref ' + refs0, fs0 .type, st)

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 20:
st[r -- mkfs(class, ty1, fieldvar) '] = refval(r0), mkfs(class, ty1, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_referencevalue(st[r -- mkfs(class, ty1, fieldvar) ']), junkrefs(str, r0 ' + refs, ty1, st), st[r -- _type] .type ≤ ty, is_obj(str, r, st), ∀ str0, refs1, ty0, st0. junkrefs(str0, (r0 ' + refs) + jvmref ' + refs1, ty0, st0) ↔ junkrefs(str0, r0 ' + refs, ty0, st0) ⊦ r = jvmref, ∃ fs0. fs0 ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs0 ']) ∧ r0 = st[r -- fs0 '] .refval ∧ junkrefs(str, (st[r -- fs0 '] .refval ' + refs) + jvmref ' + refs0, fs0 .type, st)

Rule argument

[speclemmaarg: ,is_referencevalue(val) → (r = val .refval ↔ val = refval(r)) ,[val, r] → [st[r -- mkfs(class, ty1, fieldvar) '], r0] ,T ,javavalue , ,elim-13 ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ is_referencevalue(val) → ( r = val .refval ↔ val = refval(r))])], [EXTRATERMS : (st[r -- mkfs(class, ty1, fieldvar) '], r0)]]