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Proof step 28 from proof lookup-statfield (previous step)

st[r -- sk0] = refval(r0), st[r -- _type] .type = mkclasstype(class), sk0 ∈ instfields(class), fits(r0, sks0, st), junkref(str, r0, st), is_obj(str, r, st), ∀ r, st, sk, val, str. fits(r, sks0, st) → r = jvmref ∨ (st[jvmref -- sk, val][r -- sks0]) = st[r -- sks0] ∨ junkref(str, r, st) ⊦ is_indexkey(sk0), r = jvmref, (st[jvmref -- sk, val][r0 -- sks0]) = st[r0 -- sks0], sks0 = [], ∃ fs. fs ' ∈ instfields(class) ∧ is_referencevalue(st[r -- fs ']) ∧ st[r -- fs '] .refval ≠ jvmref ∧ (¬ st[st[r -- fs '] .refval -- _type] .type ≤ fs .type ∨ junkref(str, st[r -- fs '] .refval, st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
st[r -- sk0] = refval(r0), st[r -- _type] .type = mkclasstype(class), sk0 ∈ instfields(class), fits(r0, sks0, st), junkref(str, r0, st), is_obj(str, r, st), is_fskey(sk0), ∀ r, st, sk, val, str. fits(r, sks0, st) → r = jvmref ∨ (st[jvmref -- sk, val][r -- sks0]) = st[r -- sks0] ∨ junkref(str, r, st) ⊦ r = jvmref, (st[jvmref -- sk, val][r0 -- sks0]) = st[r0 -- sks0], sks0 = [], ∃ fs. fs ' ∈ instfields(class) ∧ is_referencevalue(st[r -- fs ']) ∧ st[r -- fs '] .refval ≠ jvmref ∧ (¬ st[st[r -- fs '] .refval -- _type] .type ≤ fs .type ∨ junkref(str, st[r -- fs '] .refval, st))

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_indexkey(sk) ↔ is_fskey(sk)])]]