Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:15:23 2012 Optimize a model with 247 rows, 702 columns and 702 nonzeros Model has 492 quadratic constraints Presolve removed 0 rows and 21 columns Presolve time: 2.87s Presolved: 247 rows, 681 columns, 681 nonzeros Variable types: 492 continuous, 189 integer (188 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 0 112.0000000 - - - 2s 0 0 0.00000 0 44 112.00000 0.00000 100% - 2s 0 0 0.00000 0 11 112.00000 0.00000 100% - 2s 0 0 0.00000 0 155 112.00000 0.00000 100% - 2s 0 2 0.00000 0 155 112.00000 0.00000 100% - 3s H 40 40 23.0000000 2.52335 89.0% 37.8 3s H 54 54 22.0000000 2.52335 88.5% 32.4 3s * 78 64 50 21.0000000 2.52335 88.0% 26.3 3s * 130 82 38 20.0000000 3.56612 82.2% 23.9 3s 686 328 18.72000 20 186 20.00000 7.86580 60.7% 34.2 5s * 690 309 22 19.0000000 7.86580 58.6% 34.3 5s 801 343 9.15702 15 155 19.00000 7.86580 58.6% 39.1 11s 2278 356 17.44698 28 364 19.00000 12.50000 34.2% 34.6 15s * 2368 319 35 18.0000000 12.78790 29.0% 34.7 15s H 2436 276 17.0000000 12.97778 23.7% 34.4 15s Explored 3090 nodes (106259 simplex iterations) in 18.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%