Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:53:32 2012 Optimize a model with 312 rows, 861 columns and 861 nonzeros Model has 622 quadratic constraints Presolve removed 0 rows and 18 columns Presolve time: 3.63s Presolved: 312 rows, 843 columns, 843 nonzeros Variable types: 622 continuous, 221 integer (220 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 154.0000000 - - - 3s 0 0 0.00000 0 2 154.00000 0.00000 100% - 3s 0 0 0.00000 0 3 154.00000 0.00000 100% - 3s 0 0 0.00000 0 2 154.00000 0.00000 100% - 3s 0 2 0.00000 0 109 154.00000 0.00000 100% - 3s H 54 54 50.0000000 1.63333 96.7% 51.3 3s * 59 59 39 33.0000000 1.63333 95.1% 49.4 3s * 304 238 33 32.0000000 3.61538 88.7% 29.0 4s 606 406 6.00000 14 514 32.00000 6.00000 81.2% 32.8 5s * 674 423 48 31.0000000 6.00000 80.6% 36.2 5s * 1081 543 45 29.0000000 8.35766 71.2% 41.8 7s * 1090 491 53 27.0000000 8.35766 69.0% 41.7 7s H 1433 468 26.0000000 11.39286 56.2% 41.0 8s 2003 436 16.43077 30 502 26.00000 13.94030 46.4% 39.2 10s H 2744 583 25.0000000 15.52632 37.9% 38.2 13s 2857 599 16.73545 36 502 25.00000 15.76471 36.9% 37.8 15s 3108 632 20.91623 36 493 25.00000 16.26230 35.0% 37.3 20s 3940 662 19.34031 33 492 25.00000 17.40000 30.4% 36.6 25s 4939 657 20.52688 33 505 25.00000 18.50000 26.0% 36.6 30s 5793 566 22.32979 34 510 25.00000 19.39130 22.4% 36.9 35s 6634 404 23.99459 34 484 25.00000 20.36364 18.5% 37.5 40s Explored 7507 nodes (284595 simplex iterations) in 43.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%