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Proof step 24 from proof junkrefs-put-nopathexplus-equiv (previous step)

st[r -- mkfs(class, ty0, fieldvar) '] = refval(r0), junkrefs(str, r0 ' + refs1, ty0, st), mkfs(class, ty0, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), st[r -- _type] .type ≤ ty, ∀ val, sk, r, st0, ty, r2, str, refs. # refs < # (r0 + refs1) → (junkrefs(str, r2 ' + refs, ty, st0) → junkrefs(str, r2 ' + refs, ty, st0[r -- sk, val]) ∨ sk = _type ∨ path∃+(str, r2, r, st0)) ⊦ r = r0, r = jvmref, sk = _type, junkrefs(str, r0 ' + refs1, ty0, st[r0 -- sk, val]), step∃(str, r, r0, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 17:
⊦ step∃(str, r, r0, st) ↔ r ≠ jvmref ∧ is_classtype(st[r -- _type] .type) ∧ (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ st[r -- fs '] .refval = r0) ∨ is_arraytype(st[r -- _type] .type) ∧ (∃ i. 0 ≤ i ∧ i < st[r -- _length] .intval ∧ is_referencevalue(st[r -- i ']) ∧ st[r -- i '] .refval = r0)
Proof step 23:
st[r -- mkfs(class, ty0, fieldvar) '] = refval(r0), junkrefs(str, r0 ' + refs1, ty0, st), mkfs(class, ty0, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), st[r -- _type] .type ≤ ty, ∀ val, sk, r, st0, ty, r2, str, refs. # refs < # (r0 + refs1) → (junkrefs(str, r2 ' + refs, ty, st0) → junkrefs(str, r2 ' + refs, ty, st0[r -- sk, val]) ∨ sk = _type ∨ path∃+(str, r2, r, st0)) ⊦ r = r0, r = jvmref, sk = _type, junkrefs(str, r0 ' + refs1, ty0, st[r0 -- sk, val]), r ≠ jvmref ∧ is_classtype(st[r -- _type] .type) ∧ (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ st[r -- fs '] .refval = r0) ∨ is_arraytype(st[r -- _type] .type) ∧ (∃ i. 0 ≤ i ∧ i < st[r -- _length] .intval ∧ is_referencevalue(st[r -- i ']) ∧ st[r -- i '] .refval = r0)

Rule argument

[crewrite-arg: step-exists-def , F , [st, r0, r, str] → [st, r0, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, r0, r, str)]]