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Proof step 28 from proof fits-put-02 (previous step)

is_obj(str, r, st), st[r -- sk] = refval(r0), r1 ∈ st, is_referencevalue(st[r -- (sk ' + sks0)]), okarray(r1, byte_type, st), fits(r0, sks0, st[r1 -- i ', byteval(by)]), r ≠ r1 ∨ sk ≠ i ', ∀ st, r, r1, i, by, str. is_referencevalue(st[r -- sks0]) ∧ okarray(r1, byte_type, st) ∧ fits(r, sks0, st[r1 -- i ', byteval(by)]) ∧ r1 ∈ st → r1 = jvmref ∨ fits(r, sks0, st) ∨ junkref(str, r, st), is_classtype(st[r -- _type] .type) → sk ∈ instfields(st[r -- _type] .type .class), is_arraytype(st[r -- _type] .type) → is_indexkey(sk) ∧ 0 ≤ sk .index ∧ sk .index < st[r -- _length] .intval ⊦ r1 = jvmref, r = jvmref, junkref(str, r, st), fits(r0, sks0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
st[r -- sk] = refval(r0), is_obj(str, r, st), r1 ∈ st, is_referencevalue(st[r -- (sk ' + sks0)]), okarray(r1, byte_type, st), fits(r0, sks0, st[r1 -- i ', byteval(by)]), is_classtype(st[r -- _type] .type), sk ∈ instfields(st[r -- _type] .type .class), ∀ st, r, r1, i, by, str. is_referencevalue(st[r -- sks0]) ∧ okarray(r1, byte_type, st) ∧ fits(r, sks0, st[r1 -- i ', byteval(by)]) ∧ r1 ∈ st → r1 = jvmref ∨ fits(r, sks0, st) ∨ junkref(str, r, st) ⊦ r1 = jvmref, r = jvmref, r = r1, junkref(str, r, st), fits(r0, sks0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_classtype(mkarraytype(ty))], [CSIMPSEQ : ⊦ okarray(r, byte_type, st) → st[r -- _type] .type = mkarraytype(byte_type)], [CSIMPSEQ : ⊦ is_classtype(ty) → ¬ is_arraytype(ty)], [CSIMPSEQ : ⊦ ¬ is_classtype (st[r -- _type] .type) → ¬ is_obj(str, r, st)])]]