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Proof step 22 from proof unchanged-junkrefs (previous step)

st[r -- _type] = st1[r -- _type], refs0 .first = st1[r -- fs '] .refval, is_obj(str, r, st1), is_obj(str, r, st), fs ' ∈ instfields(st1[r -- _type] .type .class), is_referencevalue(st1[r -- fs ']), junkrefs(str, refs0, fs .type, st1), unchanged(str, r, st, st1), st1[r -- _type] .type ≤ ty, unchangedNorec(r, st, st1), ∀ str, st, st1, ty. unchanged(str, refs0 .first, st, st1) ∧ ¬ junkrefs(str, refs0, ty, st) → ¬ junkrefs(str, refs0, ty, st1) ⊦ r = jvmref, refs0 = [], fs ' ∈ instfields(st1[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ refs0 .first = st[r -- fs '] .refval ∧ junkrefs(str, refs0, fs .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 21:
st[r -- _type] = st1[r -- _type], refs0 .first = st1[r -- fs '] .refval, is_obj(str, r, st1), is_obj(str, r, st), fs ' ∈ instfields(st1[r -- _type] .type .class), is_referencevalue(st1[r -- fs ']), junkrefs(str, refs0, fs .type, st1), unchanged(str, r, st, st1), st1[r -- _type] .type ≤ ty, unchangedNorec(r, st, st1), ∀ str, st, st1, ty. unchanged(str, refs0 .first, st, st1) ∧ ¬ junkrefs(str, refs0, ty, st) → ¬ junkrefs(str, refs0, ty, st1) ⊦ r = jvmref, refs0 = [], is_referencevalue(st[r -- fs ']) ∧ refs0 .first = st[r -- fs '] .refval ∧ junkrefs(str, refs0, fs .type, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]