Gurobi 5.0.1 (linux64) logging started Mon Nov 19 08:34:47 2012 Optimize a model with 6253 rows, 157 columns and 12506 nonzeros Presolve removed 4579 rows and 0 columns Presolve time: 0.27s Presolved: 1674 rows, 157 columns, 12549 nonzeros Variable types: 0 continuous, 157 integer (157 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.900892e+01, 699 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19.00892 0 152 6.00000 19.00892 217% - 0s H 0 0 8.0000000 19.00892 138% - 0s 0 0 18.43228 0 152 8.00000 18.43228 130% - 0s H 0 0 9.0000000 18.43228 105% - 0s 0 0 18.16817 0 156 9.00000 18.16817 102% - 0s H 0 0 10.0000000 18.16817 81.7% - 0s 0 0 18.10962 0 155 10.00000 18.10962 81.1% - 1s 0 0 18.06383 0 156 10.00000 18.06383 80.6% - 1s 0 0 18.05389 0 154 10.00000 18.05389 80.5% - 1s 0 0 18.05021 0 155 10.00000 18.05021 80.5% - 1s 0 0 18.04977 0 155 10.00000 18.04977 80.5% - 1s 0 0 18.04898 0 155 10.00000 18.04898 80.5% - 2s 0 0 18.04865 0 155 10.00000 18.04865 80.5% - 2s 0 2 18.04864 0 155 10.00000 18.04864 80.5% - 2s 198 152 14.42610 8 80 10.00000 17.41076 74.1% 96.9 5s 601 317 12.04123 11 155 10.00000 15.03721 50.4% 89.8 12s 612 326 15.03721 13 153 10.00000 15.03721 50.4% 91.9 15s 748 363 11.96906 81 83 10.00000 15.03721 50.4% 127 20s 1520 315 11.56097 23 40 10.00000 13.53314 35.3% 89.2 25s 1830 331 11.98224 49 64 10.00000 13.02456 30.2% 82.7 30s 2220 195 cutoff 40 10.00000 11.95338 19.5% 76.5 35s Cutting planes: Clique: 72 Explored 2528 nodes (177436 simplex iterations) in 35.56 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%