Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:46:26 2012 Optimize a model with 5478 rows, 148 columns and 10956 nonzeros Presolve removed 3977 rows and 0 columns Presolve time: 0.21s Presolved: 1501 rows, 148 columns, 10861 nonzeros Variable types: 0 continuous, 148 integer (148 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.851462e+01, 711 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18.51462 0 147 7.00000 18.51462 164% - 0s H 0 0 8.0000000 18.51462 131% - 0s 0 0 18.01056 0 148 8.00000 18.01056 125% - 0s 0 0 17.88625 0 148 8.00000 17.88625 124% - 0s 0 0 17.81862 0 148 8.00000 17.81862 123% - 0s H 0 0 9.0000000 17.81862 98.0% - 0s 0 0 17.79562 0 148 9.00000 17.79562 97.7% - 1s 0 0 17.79027 0 148 9.00000 17.79027 97.7% - 1s 0 0 17.78399 0 148 9.00000 17.78399 97.6% - 1s 0 0 17.78377 0 148 9.00000 17.78377 97.6% - 1s 0 0 17.78376 0 148 9.00000 17.78376 97.6% - 1s 0 2 17.78206 0 148 9.00000 17.78206 97.6% - 2s * 288 185 10 10.0000000 16.75687 67.6% 83.5 4s 310 185 11.73923 18 62 10.00000 16.75687 67.6% 82.7 5s 601 273 12.94161 14 148 10.00000 14.61593 46.2% 77.6 10s 665 318 12.18230 42 65 10.00000 14.61593 46.2% 103 15s 1459 238 12.62991 31 60 10.00000 12.80912 28.1% 81.1 20s 1772 144 11.65320 23 43 10.00000 11.94486 19.4% 74.4 25s Cutting planes: Clique: 52 Explored 1993 nodes (137734 simplex iterations) in 26.96 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%