Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:50:31 2012 Optimize a model with 304 rows, 850 columns and 850 nonzeros Model has 606 quadratic constraints Presolve removed 0 rows and 17 columns Presolve time: 3.52s Presolved: 304 rows, 833 columns, 833 nonzeros Variable types: 606 continuous, 227 integer (226 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 0 166.0000000 - - - 3s 0 0 0.00000 0 135 166.00000 0.00000 100% - 3s 0 0 0.01035 0 198 166.00000 0.01035 100% - 3s 0 2 0.01561 0 198 166.00000 0.01561 100% - 3s H 54 54 30.0000000 1.63904 94.5% 33.3 3s H 73 71 28.0000000 1.63904 94.1% 29.6 3s 601 410 27.53540 17 198 28.00000 7.84466 72.0% 30.0 8s H 809 479 27.0000000 7.84466 70.9% 45.3 9s 911 508 25.85106 44 260 27.00000 8.96673 66.8% 44.3 10s * 1029 468 45 26.0000000 9.68544 62.7% 42.3 10s * 1075 450 42 25.0000000 10.50000 58.0% 41.8 10s * 1518 366 40 24.0000000 13.73335 42.8% 39.0 11s H 2467 313 23.0000000 16.83077 26.8% 35.5 14s 2747 290 19.91592 34 497 23.00000 17.59694 23.5% 35.5 15s 3151 224 20.04545 30 455 23.00000 18.60604 19.1% 35.0 20s Explored 3702 nodes (128771 simplex iterations) in 22.75 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%