Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:44:00 2012 Optimize a model with 269 rows, 756 columns and 756 nonzeros Model has 536 quadratic constraints Presolve removed 0 rows and 18 columns Presolve time: 3.13s Presolved: 269 rows, 738 columns, 738 nonzeros Variable types: 536 continuous, 202 integer (201 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 0 142.0000000 - - - 3s 0 0 0.00000 0 55 142.00000 0.00000 100% - 3s 0 0 0.00000 0 60 142.00000 0.00000 100% - 3s 0 0 0.00000 0 57 142.00000 0.00000 100% - 3s 0 2 0.00000 0 2 142.00000 0.00000 100% - 3s H 49 49 32.0000000 0.44565 98.6% 45.5 3s * 67 67 47 30.0000000 0.44565 98.5% 37.1 3s H 129 103 28.0000000 0.95062 96.6% 31.2 3s * 136 103 43 26.0000000 0.95062 96.3% 31.6 3s H 181 112 24.0000000 1.00000 95.8% 30.4 3s * 245 154 22 23.0000000 1.44624 93.7% 32.7 3s * 273 155 17 21.0000000 2.25600 89.3% 34.2 3s 606 302 5.75328 11 459 21.00000 5.75328 72.6% 34.7 5s * 760 331 48 20.0000000 5.89796 70.5% 47.0 6s H 1035 335 19.0000000 9.00000 52.6% 45.9 7s H 2117 179 18.0000000 13.38462 25.6% 39.6 9s 2261 153 16.35165 27 471 18.00000 13.81356 23.3% 38.8 10s Explored 2666 nodes (103656 simplex iterations) in 11.12 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%