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Proof step 4 from proof add-isarray (previous step)

∀ r, r0, i, class1, st. r = r0 ∨ (is_arrayref(r, i, addobj(r0, class1, fis0, st)) ↔ is_arrayref(r, i, st)) ⊦ r = r0, is_arrayref(r, i, addobj(r0, class1, fv + fis0, st)) ↔ is_arrayref(r, i, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ addobj(r, class1, fv ' + fis, st) = (addobj(r, class1, fis, st)[r -- fv .1, fv .2])
Proof step 3:
∀ r, r0, i, class1, st. r = r0 ∨ (is_arrayref(r, i, addobj(r0, class1, fis0, st)) ↔ is_arrayref(r, i, st)) ⊦ r = r0, is_arrayref(r, i, addobj(r0, class1, fis0, st)) ↔ is_arrayref(r, i, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r ≠ r0 → ( is_arrayref (r, i, st[r0 -- sk, val0]) ↔ is_arrayref(r, i, st))], [CSIMPSEQ : ⊦ (fis + fis0) + fis1 = fis + fis0 + fis1], [CSIMPSEQ : ⊦ fv + fis = fv ' + fis])]]