Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:03:53 2012 Optimize a model with 272 rows, 767 columns and 767 nonzeros Model has 542 quadratic constraints Presolve removed 0 rows and 16 columns Presolve time: 3.16s Presolved: 272 rows, 751 columns, 751 nonzeros Variable types: 542 continuous, 209 integer (208 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 0 144.0000000 - - - 3s 0 0 0.00000 0 56 144.00000 0.00000 100% - 3s 0 0 0.00000 0 76 144.00000 0.00000 100% - 3s 0 0 0.00000 0 159 144.00000 0.00000 100% - 3s 0 2 0.00000 0 157 144.00000 0.00000 100% - 3s H 41 41 28.0000000 2.13158 92.4% 53.2 3s * 41 41 30 25.0000000 2.13158 91.5% 53.3 3s H 219 135 23.0000000 2.29936 90.0% 27.7 3s * 244 154 42 22.0000000 2.29936 89.5% 26.8 3s * 539 261 13 21.0000000 4.13158 80.3% 27.9 4s 706 342 5.43351 14 461 21.00000 5.43351 74.1% 30.5 5s * 1032 399 57 19.0000000 5.93048 68.8% 40.3 6s 2400 268 16.31579 35 456 19.00000 13.46821 29.1% 37.2 10s 3282 152 17.05806 36 441 19.00000 15.03540 20.9% 37.1 15s Explored 3701 nodes (138663 simplex iterations) in 16.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%