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Proof step 22 from proof junkrefs-delete-02 (previous step)

is_obj(str, r0, st) ∧ st[r0 -- _type] .type ≤ ty, is_obj(str, r0, st), acc ≠ [] ∧ (∃ fs. fs ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_referencevalue(st[r0 -- fs ']) ∧ acc .first = st[r0 -- fs '] .refval ∧ junkrefs(str, acc, fs .type, st)), st[r0 -- _type] .type ≤ ty, ∀ str, ty, st, r. junkrefs(str, acc, ty, st) → junkrefs(str, acc, ty, st -- r) ⊦ r = r0, r0 = jvmref, junkrefs(str, r0 ' + acc, ty, st -- r)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 21:
acc .first = st[r0 -- fs '] .refval, st[r0 -- _type] .type ≤ ty, junkrefs(str, acc, fs .type, st), is_referencevalue(st[r0 -- fs ']), fs ' ∈ instfields(st[r0 -- _type] .type .class), is_obj(str, r0, st), ∀ str, ty, st, r. junkrefs(str, acc, ty, st) → junkrefs(str, acc, ty, st -- r) ⊦ acc = [], r0 = jvmref, r = r0, junkrefs(str, r0 ' + acc, ty, st -- r)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]