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Proof step 13 from proof in-payload (previous step)

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

User applied rule insert equation

And obtained the following new goals

Proof step 14:
zbrar[m] = mkzentry(key0, adr), m < # zbrar, m + nused0 < # zbrar ⊦ key = key0 ∨ (∃ n. n < nused0 ∧ zbrar[(m + 1) + n].entry? ∧ zbrar[(m + 1) + n].key = key) ↔ (∃ n. ¬ nused0 < n ∧ zbrar[m + n].entry? ∧ zbrar[m + n].key = key)

Rule argument

pos: left 1 flags: discard

Proof step 13 from proof in-payload (previous step)

User applied rule insert equation

And obtained the following new goals

Rule argument

Additional information