Gurobi 5.0.1 (linux64) logging started Mon Nov 19 09:55:22 2012 Optimize a model with 7021 rows, 168 columns and 14042 nonzeros Presolve removed 5105 rows and 0 columns Presolve time: 0.31s Presolved: 1916 rows, 168 columns, 14006 nonzeros Variable types: 0 continuous, 168 integer (168 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 2.078088e+01, 903 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20.78088 0 167 7.00000 20.78088 197% - 0s H 0 0 8.0000000 20.78088 160% - 0s 0 0 20.04526 0 167 8.00000 20.04526 151% - 0s H 0 0 9.0000000 20.04526 123% - 0s 0 0 19.94973 0 167 9.00000 19.94973 122% - 1s 0 0 19.84681 0 167 9.00000 19.84681 121% - 1s 0 0 19.80879 0 167 9.00000 19.80879 120% - 1s 0 0 19.79411 0 167 9.00000 19.79411 120% - 1s 0 0 19.77713 0 168 9.00000 19.77713 120% - 1s 0 0 19.76615 0 168 9.00000 19.76615 120% - 2s 0 0 19.76088 0 168 9.00000 19.76088 120% - 2s H 0 0 10.0000000 19.76088 97.6% - 2s 0 0 19.75493 0 168 10.00000 19.75493 97.5% - 2s 0 0 19.75175 0 168 10.00000 19.75175 97.5% - 2s 0 0 19.75165 0 168 10.00000 19.75165 97.5% - 3s 0 0 19.75163 0 168 10.00000 19.75163 97.5% - 3s 0 0 19.75155 0 168 10.00000 19.75155 97.5% - 3s 0 2 19.75038 0 168 10.00000 19.75038 97.5% - 4s 28 30 16.50523 28 135 10.00000 19.75038 97.5% 191 5s 463 315 12.01199 15 43 10.00000 18.20402 82.0% 96.7 10s 601 394 13.05152 19 168 10.00000 17.33094 73.3% 93.9 15s 622 410 17.33094 18 162 10.00000 17.33094 73.3% 106 20s 715 472 11.44970 64 55 10.00000 16.28321 62.8% 144 25s 1244 507 12.43654 24 45 10.00000 15.27527 52.8% 112 30s 1639 531 12.09724 24 45 10.00000 14.74081 47.4% 95.9 35s 1931 572 11.68839 30 39 10.00000 14.48704 44.9% 88.1 40s 2692 719 cutoff 40 10.00000 13.82156 38.2% 76.6 45s 3319 712 12.18872 53 61 10.00000 12.97519 29.8% 72.1 50s 4194 289 11.70144 56 56 10.00000 11.79118 17.9% 65.0 55s Cutting planes: Clique: 66 Explored 4561 nodes (280432 simplex iterations) in 55.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%