Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:19:39 2012 Optimize a model with 280 rows, 785 columns and 785 nonzeros Model has 558 quadratic constraints Presolve removed 0 rows and 13 columns Presolve time: 3.26s Presolved: 280 rows, 772 columns, 772 nonzeros Variable types: 558 continuous, 214 integer (213 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 0 137.0000000 - - - 3s 0 0 0.00000 0 96 137.00000 0.00000 100% - 3s 0 0 0.00000 0 139 137.00000 0.00000 100% - 3s 0 0 0.00000 0 115 137.00000 0.00000 100% - 3s 0 2 0.00000 0 115 137.00000 0.00000 100% - 3s H 46 44 25.0000000 2.10526 91.6% 35.7 3s H 156 112 23.0000000 3.11940 86.4% 24.9 3s * 160 108 43 22.0000000 3.11940 85.8% 24.8 3s 606 356 6.50000 13 464 22.00000 6.50000 70.5% 27.1 5s * 739 405 43 21.0000000 6.50000 69.0% 39.6 6s * 814 396 47 20.0000000 7.27826 63.6% 39.7 6s 2236 194 17.89655 37 433 20.00000 14.63529 26.8% 36.3 10s Explored 3215 nodes (113473 simplex iterations) in 14.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%