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Proof step 21 from proof junkref-update-equiv (previous step)

st[r -- mkfs(class, ty, fieldvar) '] = refval(r1), st[r1 -- _type] .type ≤ ty, validFields(r0, fis, st), is_valid_ref(str, r0, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), junkrefs(str, r1 ' + acc, ty, st), is_obj(str, r, st), ∀ r0, fis, st, str, r. validFields(r0, fis, st) ∧ is_valid_ref(str, r0, st) ∧ junkrefs(str, r ' + acc, st[r -- _type] .type, st) → junkref(str, r, update(r0, fis, st)) ∨ path∃(str, r, r0, st) ∨ _type ∈ fis ⊦ r = r0, r1 = jvmref, r = jvmref, junkref(str, r1, update(r0, fis, st)), _type ∈ fis, mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- mkfs(class, ty, fieldvar) ']) ∧ ( st[r -- mkfs(class, ty, fieldvar) '] .refval ≠ jvmref ∧ st[st[r -- mkfs(class, ty, fieldvar) '] .refval -- _type] .type ≤ mkfs(class, ty, fieldvar) .type ∧ path∃(str, st[r -- mkfs(class, ty, fieldvar) '] .refval, r0, st) ∨ st[r -- mkfs(class, ty, fieldvar) '] .refval = jvmref ∧ r0 = jvmref)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
st[r -- mkfs(class, ty, fieldvar) '] = refval(r1), is_obj(str, r, st), junkrefs(str, r1 ' + acc, ty, st), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_valid_ref(str, r0, st), validFields(r0, fis, st), st[r1 -- _type] .type ≤ ty, ∀ r0, fis, st, str, r. validFields(r0, fis, st) ∧ is_valid_ref(str, r0, st) ∧ junkrefs(str, r ' + acc, st[r -- _type] .type, st) → junkref(str, r, update(r0, fis, st)) ∨ path∃(str, r, r0, st) ∨ _type ∈ fis ⊦ r = jvmref, r1 = jvmref, r = r0, _type ∈ fis, junkref(str, r1, update(r0, fis, st)), path∃(str, r1, r0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ refval(r) .refval = r], [CSIMPSEQ : ⊦ is_referencevalue(refval(r))], [CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) .type = ty])]]