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Proof step 14 from proof unchanged-junkrefs (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 11:
⊦ unchangedNorec(r, st, st0) ∧ is_obj(str, r, st0) → (¬ is_obj(str, r, st) ↔ false)
Proof step 13:
st[r -- _type] = st1[r -- _type], junkrefs(str, st[r -- fs '] .refval ' + refs, fs .type, st1), is_referencevalue(st[r -- fs ']), fs ' ∈ instfields(st1[r -- _type] .type .class), is_obj(str, r, st), is_obj(str, r, st1), is_classtype(st1[r -- _type] .type), unchangedNorec(r, st, st1), st1[r -- _type] .type ≤ ty, unchanged(str, r, st, st1) ⊦ r = jvmref, st[r -- fs '] .refval = jvmref, junkrefs(str, st[r -- fs '] .refval ' + refs, fs .type, st), unchanged(str, st[r -- fs '] .refval, st, st1), st[st[r -- fs '] .refval -- _type] .type ≤ fs .type ∧ is_valid_ref(str, st[r -- fs '] .refval, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ fs ' .fs = fs], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1])]]