Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:43:38 2012 Optimize a model with 304 rows, 849 columns and 849 nonzeros Model has 606 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 3.53s Presolved: 304 rows, 829 columns, 829 nonzeros Variable types: 606 continuous, 223 integer (222 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 0 148.0000000 - - - 3s 0 0 0.00000 0 98 148.00000 0.00000 100% - 3s 0 0 0.00000 0 134 148.00000 0.00000 100% - 3s 0 0 0.00000 0 125 148.00000 0.00000 100% - 3s 0 2 0.00000 0 121 148.00000 0.00000 100% - 3s H 40 40 34.0000000 3.53731 89.6% 51.5 3s * 40 40 29 32.0000000 3.53731 88.9% 53.0 3s H 252 177 29.0000000 3.83636 86.8% 27.6 4s * 252 163 31 28.0000000 3.83636 86.3% 27.7 4s 605 344 23.00859 12 511 28.00000 7.32039 73.9% 26.8 5s * 886 428 49 26.0000000 7.32039 71.8% 42.0 6s 2152 437 cutoff 43 26.00000 14.89362 42.7% 35.8 10s * 2735 510 44 25.0000000 16.20408 35.2% 33.9 11s H 2912 486 24.0000000 16.70763 30.4% 34.0 12s H 2967 418 23.0000000 16.83452 26.8% 33.9 13s 3079 410 19.11340 38 515 23.00000 17.00000 26.1% 33.7 15s 4129 118 21.59162 39 493 23.00000 20.80734 9.53% 33.0 20s Explored 4260 nodes (140905 simplex iterations) in 20.27 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%