Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:26:52 2012 Optimize a model with 242 rows, 698 columns and 698 nonzeros Model has 482 quadratic constraints Presolve removed 0 rows and 18 columns Presolve time: 2.81s Presolved: 242 rows, 680 columns, 680 nonzeros Variable types: 482 continuous, 198 integer (197 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 0 109.0000000 - - - 2s 0 0 0.00000 0 60 109.00000 0.00000 100% - 2s 0 0 0.00000 0 87 109.00000 0.00000 100% - 2s 0 0 0.00000 0 4 109.00000 0.00000 100% - 2s 0 2 0.00000 0 2 109.00000 0.00000 100% - 2s H 44 44 27.0000000 0.39306 98.5% 35.0 3s * 60 50 43 23.0000000 0.39306 98.3% 32.3 3s H 122 86 20.0000000 0.88273 95.6% 28.9 3s H 282 145 18.0000000 1.56275 91.3% 25.5 3s 601 324 16.34091 17 4 18.00000 3.91713 78.2% 22.7 5s * 830 392 41 17.0000000 5.05882 70.2% 36.2 6s * 883 366 39 16.0000000 5.38333 66.4% 36.7 7s H 2056 74 15.0000000 12.00000 20.0% 34.8 9s Explored 2177 nodes (77416 simplex iterations) in 9.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%