Gurobi 5.0.1 (linux64) logging started Mon Nov 19 09:52:36 2012 Optimize a model with 6934 rows, 167 columns and 13868 nonzeros Presolve removed 4942 rows and 0 columns Presolve time: 0.32s Presolved: 1992 rows, 167 columns, 14618 nonzeros Variable types: 0 continuous, 167 integer (167 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 2.087072e+01, 843 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20.87072 0 164 7.00000 20.87072 198% - 0s H 0 0 8.0000000 20.87072 161% - 0s 0 0 20.27168 0 167 8.00000 20.27168 153% - 0s H 0 0 9.0000000 20.27168 125% - 0s 0 0 20.14553 0 167 9.00000 20.14553 124% - 1s 0 0 20.04734 0 166 9.00000 20.04734 123% - 1s 0 0 19.96739 0 167 9.00000 19.96739 122% - 1s 0 0 19.91718 0 167 9.00000 19.91718 121% - 1s 0 0 19.87716 0 167 9.00000 19.87716 121% - 2s 0 0 19.85141 0 167 9.00000 19.85141 121% - 2s 0 0 19.84550 0 167 9.00000 19.84550 121% - 2s 0 0 19.84429 0 167 9.00000 19.84429 120% - 2s 0 0 19.84357 0 167 9.00000 19.84357 120% - 2s 0 0 19.84297 0 167 9.00000 19.84297 120% - 3s H 0 0 10.0000000 19.84297 98.4% - 3s 0 2 19.84191 0 167 10.00000 19.84191 98.4% - 3s 63 65 13.09422 63 101 10.00000 19.83684 98.4% 117 5s 514 349 13.58643 24 73 10.00000 17.67852 76.8% 89.5 10s 601 408 11.56087 33 167 10.00000 17.36151 73.6% 87.0 17s 611 417 17.36151 16 165 10.00000 17.36151 73.6% 88.0 20s 660 449 12.93414 40 67 10.00000 17.09710 71.0% 122 25s 923 484 13.87163 34 74 10.00000 16.08640 60.9% 130 30s 1460 542 11.53695 26 42 10.00000 14.91775 49.2% 98.9 35s 1792 564 12.04167 30 42 10.00000 14.62732 46.3% 88.8 40s 2102 620 11.44868 27 41 10.00000 14.42126 44.2% 82.8 45s 2720 738 11.07058 34 39 10.00000 13.75059 37.5% 75.1 50s 3409 702 11.91950 34 46 10.00000 13.06271 30.6% 69.8 55s 4044 461 11.84220 31 46 10.00000 12.12465 21.2% 65.8 60s Cutting planes: Clique: 78 Explored 4666 nodes (281452 simplex iterations) in 61.85 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%