Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:24:56 2012 Optimize a model with 297 rows, 828 columns and 828 nonzeros Model has 592 quadratic constraints Presolve removed 0 rows and 19 columns Presolve time: 3.49s Presolved: 297 rows, 809 columns, 809 nonzeros Variable types: 592 continuous, 217 integer (216 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 0 117 144.00000 0.00000 100% - 3s 0 0 0.00000 0 191 144.00000 0.00000 100% - 3s 0 0 0.00000 0 168 144.00000 0.00000 100% - 3s 0 2 0.00000 0 168 144.00000 0.00000 100% - 3s H 54 54 32.0000000 3.50000 89.1% 42.2 3s * 61 61 33 30.0000000 3.50000 88.3% 39.9 3s H 81 71 28.0000000 3.50000 87.5% 32.7 3s * 125 89 27 27.0000000 3.53435 86.9% 30.8 3s H 400 226 26.0000000 10.40623 60.0% 33.8 4s H 449 225 25.0000000 10.65349 57.4% 33.4 4s 607 268 12.41326 11 803 25.00000 12.41326 50.3% 36.6 5s 2335 642 23.31587 33 445 25.00000 14.79807 40.8% 37.1 10s * 2940 710 42 24.0000000 15.81818 34.1% 35.4 11s H 3498 631 23.0000000 16.81856 26.9% 35.4 12s 4325 543 20.93333 31 515 23.00000 18.16667 21.0% 35.2 15s 5167 344 22.00000 32 418 23.00000 19.50000 15.2% 34.4 20s 5478 234 21.11288 34 478 23.00000 20.25000 12.0% 34.5 25s Explored 5793 nodes (201025 simplex iterations) in 27.47 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%