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Proof step 18 from proof ebm-order-antisym (previous step)

# avols1[v] = # avols0[v], unmapped = avols0[v][n], n < # avols0[v], v ∈ avols0, v ∈ avols1, avols1[v][n] ≠ unmapped → (avols1[v][n] = erased → avols0[v][n] = erased) ∧ ¬ avols1[v][n].mapped?, avols0[v][n] ≠ unmapped → (avols0[v][n] = erased → avols1[v][n] = erased) ∧ ¬ avols0[v][n].mapped? ⊦ avols0[v][n] = avols1[v][n]

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 19:
# avols1[v] = # avols0[v], unmapped = avols0[v][n], n < # avols0[v], v ∈ avols0, v ∈ avols1 ⊦ avols1[v][n] = erased, unmapped = avols1[v][n], avols1[v][n].mapped?

Rule argument

Additional information

Used simplifier rules: ⊦ unmapped ≠ erased; (s)