Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:56:35 2012 Optimize a model with 308 rows, 859 columns and 859 nonzeros Model has 614 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 3.61s Presolved: 308 rows, 837 columns, 837 nonzeros Variable types: 614 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 0 156.0000000 - - - 3s 0 0 0.00000 0 2 156.00000 0.00000 100% - 3s 0 0 0.00000 0 185 156.00000 0.00000 100% - 3s 0 0 0.00000 0 169 156.00000 0.00000 100% - 3s 0 2 0.00000 0 169 156.00000 0.00000 100% - 3s H 37 37 32.0000000 2.57576 92.0% 55.9 3s * 37 37 22 30.0000000 2.57576 91.4% 56.5 3s H 183 144 29.0000000 4.54839 84.3% 32.7 4s 605 380 21.15164 12 516 29.00000 9.36232 67.7% 28.6 5s * 691 405 56 28.0000000 9.36232 66.6% 37.5 5s * 692 380 57 27.0000000 9.36232 65.3% 37.4 5s * 845 418 48 26.0000000 9.36232 64.0% 49.3 6s H 940 421 25.0000000 9.36232 62.6% 49.0 7s 1980 222 20.10881 35 495 25.00000 17.45161 30.2% 40.5 10s 2925 116 22.60606 40 456 25.00000 20.31915 18.7% 38.3 15s Explored 3286 nodes (124438 simplex iterations) in 17.28 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%