0.667 * [progress]: [Phase 1 of 3] Setting up.
0.003 * * * [progress]: [1/2] Preparing points
0.123 * * * [progress]: [2/2] Setting up program.
0.323 * [progress]: [Phase 2 of 3] Improving.
0.361 * [simplify]: Simplifying:
  (/ (- (+ f n)) (- f n))