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Proof step 19 from proof in-payload (previous step)

zbrar[(m + 1) + n].key = key, zbrar[m] = mkzentry(key0, adr), zbrar[(m + 1) + n].entry?, m + nused0 < # zbrar, m < # zbrar, n < nused0 ⊦ ∃ n. ¬ nused0 < n ∧ zbrar[m + n].entry? ∧ zbrar[m + n].key = key

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
zbrar[m] = mkzentry(key0, adr), zbrar[(m + 1) + n].entry?, m + nused0 < # zbrar, m < # zbrar, n < nused0 ⊦ ∃ n0. ¬ nused0 < n0 ∧ zbrar[m + n0].entry? ∧ zbrar[m + n0].key = zbrar[(m + 1) + n].key

Rule argument

Additional information

Used simplifier rules: ⊦ m < n → n ≠ 0; (s)%f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic