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Proof step 2 from proof tolist-ext-one (conclusion)

⊦ inv(buf) ∧ m < n → (x = tolist(buf, n) ↔ x = tolist(buf, n) ∧ x[m] = (buf .data)[(i→n(buf .first) + m) % i→n(buf .size)])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
m < n ⊦ inv(buf) → (tolist(buf, n)[m]) = (buf .data)[(i→n(buf .first) + m) % i→n(buf .size)]

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ m < n ↔ n ≤ m], [CSIMPSEQ : ⊦ m < n → (n ≤ m ↔ false)], [CSIMPSEQ : ⊦ m + n = n + m])]]