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Proof step 18 from proof add-putbar-rew (previous step)

∃ fs. sk = fs ' ⊦ r = r0, ( r1 -- sk ∈ addobj(r0, class, fis, st) ∨ r1 = r ∧ is_indexkey(sk) ∧ i ≤ sk .index ∧ sk .index < i + n→i(# bytes) ↔ r1 -- sk ∈ addobj(r0, class, fis, putByteArray(bytes, r, i, st))) ∧ (addobj(r0, class, fis, st)[r1 -- sk]) = (addobj(r0, class, fis, putByteArray(bytes, r, i, st))[r1 -- sk])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 17:
⊦ r = r0, (r1 -- fs ' ∈ addobj(r0, class, fis, st) ↔ r1 -- fs ' ∈ addobj(r0, class, fis, putByteArray(bytes, r, i, st))) ∧ (addobj(r0, class, fis, st)[r1 -- fs ']) = (addobj(r0, class, fis, putByteArray(bytes, r, i, st))[r1 -- fs '])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_indexkey(fs ')])]]