0.103 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.423 * * * [progress]: [2/2] Setting up program.
0.429 * [progress]: [Phase 2 of 3] Improving.
0.429 * [simplify]: Simplifying:
  (atan2 (* (sin (- lambda1 lambda2)) (cos phi2)) (- (* (cos phi1) (sin phi2)) (* (* (sin phi1) (cos phi2)) (cos (- lambda1 lambda2)))))