Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:29:40 2012 Optimize a model with 271 rows, 769 columns and 769 nonzeros Model has 540 quadratic constraints Presolve removed 0 rows and 17 columns Presolve time: 3.15s Presolved: 271 rows, 752 columns, 752 nonzeros Variable types: 540 continuous, 212 integer (211 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 0 141.0000000 - - - 3s 0 0 0.00000 0 99 141.00000 0.00000 100% - 3s 0 0 0.00000 0 169 141.00000 0.00000 100% - 3s 0 0 0.00000 0 167 141.00000 0.00000 100% - 3s 0 2 0.00000 0 165 141.00000 0.00000 100% - 3s H 54 54 28.0000000 3.88552 86.1% 39.4 3s * 56 56 34 27.0000000 3.88552 85.6% 39.2 3s H 108 98 24.0000000 4.14286 82.7% 29.1 3s 606 388 7.66461 16 462 24.00000 7.66461 68.1% 25.9 5s * 1053 483 107 23.0000000 7.66461 66.7% 37.5 6s * 1177 444 53 22.0000000 9.00000 59.1% 35.8 7s * 1242 403 40 21.0000000 9.54321 54.6% 36.4 7s * 1980 367 42 20.0000000 11.90099 40.5% 33.0 8s 2404 419 15.87425 31 446 20.00000 13.00000 35.0% 33.7 10s * 2471 369 46 19.0000000 13.03226 31.4% 33.5 10s 3299 230 16.33690 35 446 19.00000 15.45882 18.6% 35.2 15s Explored 3750 nodes (132972 simplex iterations) in 18.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%