Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:29:58 2012 Optimize a model with 284 rows, 795 columns and 795 nonzeros Model has 566 quadratic constraints Presolve removed 0 rows and 13 columns Presolve time: 3.30s Presolved: 284 rows, 782 columns, 782 nonzeros Variable types: 566 continuous, 216 integer (215 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 0 138.0000000 - - - 3s 0 0 0.00000 0 142 138.00000 0.00000 100% - 3s 0 0 0.12063 0 201 138.00000 0.12063 100% - 3s 0 0 0.12108 0 201 138.00000 0.12108 100% - 3s 0 2 0.12619 0 201 138.00000 0.12619 100% - 3s H 54 54 52.0000000 2.64706 94.9% 30.3 3s * 68 67 36 24.0000000 2.64706 89.0% 29.2 3s * 105 68 58 23.0000000 2.64706 88.5% 30.3 3s 605 310 14.07317 7 483 23.00000 8.62259 62.5% 30.5 5s * 1131 418 38 22.0000000 8.62259 60.8% 43.1 7s 2029 507 19.66864 31 438 22.00000 11.50000 47.7% 40.6 10s * 2296 532 40 21.0000000 12.00000 42.9% 40.6 10s 3281 607 17.00000 30 464 21.00000 13.77778 34.4% 41.8 15s 3828 616 19.00000 30 456 21.00000 14.50000 31.0% 42.5 20s 5005 557 cutoff 32 21.00000 15.84375 24.6% 41.3 25s 6147 370 19.45964 32 390 21.00000 16.94118 19.3% 40.6 30s Explored 7232 nodes (290990 simplex iterations) in 34.54 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%