Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:43:27 2012 Optimize a model with 255 rows, 728 columns and 728 nonzeros Model has 508 quadratic constraints Presolve removed 0 rows and 17 columns Presolve time: 2.95s Presolved: 255 rows, 711 columns, 711 nonzeros Variable types: 508 continuous, 203 integer (202 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 0 137.0000000 - - - 2s 0 0 0.00000 0 101 137.00000 0.00000 100% - 2s 0 0 0.00000 0 165 137.00000 0.00000 100% - 2s 0 0 0.00000 0 149 137.00000 0.00000 100% - 3s 0 2 0.00000 0 149 137.00000 0.00000 100% - 3s H 47 47 26.0000000 2.42017 90.7% 36.0 3s * 76 69 45 21.0000000 2.42017 88.5% 27.6 3s * 127 79 32 20.0000000 2.65625 86.7% 25.5 3s * 329 146 23 19.0000000 5.67532 70.1% 25.0 3s 601 222 18.65723 16 149 19.00000 8.57895 54.8% 23.7 5s * 792 273 39 18.0000000 8.57895 52.3% 35.7 7s 1845 170 cutoff 29 18.00000 12.00000 33.3% 35.2 10s Explored 2528 nodes (91504 simplex iterations) in 11.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%