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Proof step 21 from proof junkrefs-subset (previous step)

st1[r -- mkfs(class, ty1, fieldvar) '] = refval(r0), is_obj(str, r, st), st1[r -- _type] .type ≤ ty, st[r -- _type] .type ≤ ty, st ⊆ st1, mkfs(class, ty1, fieldvar) ' ∈ instfields(st1[r -- _type] .type .class), is_referencevalue(st1[r -- mkfs(class, ty1, fieldvar) ']), junkrefs(str, r0 ' + refs, ty1, st1), ∀ str0, ty0, st0, st2. junkrefs(str0, r0 ' + refs, ty0, st0) ∧ st2 ⊆ st0 → junkrefs(str0, r0 ' + refs, ty0, st2) ⊦ r = jvmref, ∃ fs0. fs0 ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs0 ']) ∧ r0 = st[r -- fs0 '] .refval ∧ junkrefs(str, r0 ' + refs, fs0 .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
st1[r -- mkfs(class, ty1, fieldvar) '] = refval(r0), junkrefs(str, r0 ' + refs, ty1, st1), mkfs(class, ty1, fieldvar) ' ∈ instfields(st1[r -- _type] .type .class), st ⊆ st1, st[r -- _type] .type ≤ ty, st1[r -- _type] .type ≤ ty, is_obj(str, r, st), ∀ str0, ty0, st0, st2. junkrefs(str0, r0 ' + refs, ty0, st0) ∧ st2 ⊆ st0 → junkrefs(str0, r0 ' + refs, ty0, st2) ⊦ r = jvmref, ∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ r0 = st[r -- fs '] .refval ∧ junkrefs(str, st[r -- fs '] .refval ' + refs, fs .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_referencevalue(refval(r))])]]