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Proof step 18 from proof junkrefs-append (previous step)

is_obj(str, r, st) ∧ st[r -- _type] .type ≤ ty, is_obj(str, r, st), acc ≠ [] ∧ (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ acc .first = st[r -- fs '] .refval ∧ junkrefs(str, acc, fs .type, st)), st[r -- _type] .type ≤ ty, ∀ str, ty, st, refs0. junkrefs(str, acc, ty, st) → junkrefs(str, acc + refs0, ty, st) ⊦ r = jvmref, junkrefs(str, (r ' + acc) + refs0, ty, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 17:
acc .first = st[r -- fs '] .refval, st[r -- _type] .type ≤ ty, junkrefs(str, acc, fs .type, st), is_referencevalue(st[r -- fs ']), fs ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), ∀ str, ty, st, refs0. junkrefs(str, acc, ty, st) → junkrefs(str, acc + refs0, ty, st) ⊦ acc = [], r = jvmref, junkrefs(str, (r ' + acc) + refs0, ty, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]