Gurobi 5.0.1 (linux64) logging started Sun Nov 18 10:04:04 2012 Optimize a model with 300 rows, 844 columns and 844 nonzeros Model has 598 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 3.53s Presolved: 300 rows, 822 columns, 822 nonzeros Variable types: 598 continuous, 224 integer (223 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 0 146.0000000 - - - 3s 0 0 0.00000 0 2 146.00000 0.00000 100% - 3s 0 0 0.00000 0 3 146.00000 0.00000 100% - 3s 0 0 0.00000 0 3 146.00000 0.00000 100% - 3s 0 2 0.00000 0 2 146.00000 0.00000 100% - 3s H 54 54 27.0000000 0.00000 100% 39.7 3s * 215 141 53 26.0000000 1.91667 92.6% 27.1 4s 606 347 6.00000 14 504 26.00000 6.00000 76.9% 33.7 5s * 917 429 55 24.0000000 6.00000 75.0% 43.9 6s 2057 582 22.00000 40 480 24.00000 12.76166 46.8% 41.9 10s H 2631 667 23.0000000 14.00000 39.1% 41.2 11s 3105 717 21.99438 36 484 23.00000 14.89796 35.2% 40.4 16s 3601 745 cutoff 36 23.00000 15.31858 33.4% 39.9 20s 4596 747 18.55191 38 462 23.00000 16.47826 28.4% 38.7 25s 5745 692 21.01087 37 460 23.00000 17.67516 23.2% 38.1 30s 6758 422 cutoff 37 23.00000 19.04762 17.2% 38.7 35s 7573 89 21.47586 36 383 23.00000 21.00000 8.70% 38.1 40s Explored 7680 nodes (292462 simplex iterations) in 40.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%