Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:43:03 2012 Optimize a model with 302 rows, 840 columns and 840 nonzeros Model has 602 quadratic constraints Presolve removed 0 rows and 11 columns Presolve time: 3.51s Presolved: 302 rows, 829 columns, 829 nonzeros Variable types: 602 continuous, 227 integer (226 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 0 156.0000000 - - - 3s 0 0 0.00000 0 62 156.00000 0.00000 100% - 3s 0 0 0.00000 0 3 156.00000 0.00000 100% - 3s 0 0 0.00000 0 184 156.00000 0.00000 100% - 3s 0 2 0.00000 0 182 156.00000 0.00000 100% - 3s H 40 40 46.0000000 2.79699 93.9% 41.0 3s * 67 63 41 30.0000000 2.79699 90.7% 32.2 3s H 108 87 29.0000000 3.23765 88.8% 26.9 3s * 214 159 30 27.0000000 3.79439 85.9% 31.0 4s * 255 179 21 26.0000000 4.16667 84.0% 32.0 4s * 293 180 25 24.0000000 4.46713 81.4% 31.8 4s 605 300 19.74194 13 516 24.00000 8.88125 63.0% 31.7 5s 2389 569 23.32220 37 330 24.00000 14.78049 38.4% 32.8 10s * 3813 653 44 23.0000000 16.67760 27.5% 29.9 13s 4501 606 18.45550 32 495 23.00000 17.48148 24.0% 30.8 15s 5906 375 cutoff 34 23.00000 19.59091 14.8% 30.6 20s 6487 77 cutoff 34 23.00000 21.23729 7.66% 30.2 25s Explored 6571 nodes (200490 simplex iterations) in 26.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%