Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:48:00 2012 Optimize a model with 300 rows, 842 columns and 842 nonzeros Model has 598 quadratic constraints Presolve removed 0 rows and 17 columns Presolve time: 3.49s Presolved: 300 rows, 825 columns, 825 nonzeros Variable types: 598 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 0 163.0000000 - - - 3s 0 0 0.00000 0 2 163.00000 0.00000 100% - 3s 0 0 0.00000 0 2 163.00000 0.00000 100% - 3s 0 0 0.00000 0 157 163.00000 0.00000 100% - 3s 0 2 0.00000 0 157 163.00000 0.00000 100% - 3s H 54 54 32.0000000 2.24138 93.0% 39.7 3s * 56 56 39 29.0000000 2.24138 92.3% 39.1 3s * 122 77 38 25.0000000 2.96610 88.1% 28.7 3s H 490 298 24.0000000 6.55422 72.7% 22.9 4s 626 378 14.05759 22 669 24.00000 7.25581 69.8% 31.3 5s * 689 371 53 22.0000000 7.25581 67.0% 33.9 5s * 946 420 43 21.0000000 7.25581 65.4% 41.5 6s 2279 426 18.86034 35 441 21.00000 14.04348 33.1% 36.5 10s 3062 508 17.03911 33 442 21.00000 14.93750 28.9% 33.8 15s 4405 560 19.50000 32 484 21.00000 16.00000 23.8% 32.2 20s 5609 500 19.25000 33 482 21.00000 16.78571 20.1% 30.7 25s 6913 309 18.93333 34 443 21.00000 17.61538 16.1% 29.7 30s Explored 7750 nodes (230776 simplex iterations) in 33.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%