Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:51:17 2012 Optimize a model with 397 rows, 281 columns and 1271 nonzeros Presolve time: 0.00s Presolved: 397 rows, 281 columns, 1271 nonzeros Variable types: 0 continuous, 281 integer (281 binary) Found heuristic solution: objective 93.0000000 Root relaxation: objective 0.000000e+00, 113 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 83 93.00000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s 0 0 0.86446 0 84 71.00000 0.86446 98.8% - 0s 0 0 1.61782 0 89 71.00000 1.61782 97.7% - 0s 0 0 1.66450 0 89 71.00000 1.66450 97.7% - 0s H 0 0 68.0000000 1.66450 97.6% - 0s 0 0 1.73907 0 89 68.00000 1.73907 97.4% - 0s 0 0 1.74803 0 91 68.00000 1.74803 97.4% - 0s H 0 0 64.0000000 1.74803 97.3% - 0s H 0 0 63.0000000 1.74803 97.2% - 0s 0 2 1.75000 0 91 63.00000 1.75000 97.2% - 0s * 36 36 19 48.0000000 6.08314 87.3% 33.2 0s * 161 120 20 47.0000000 8.47566 82.0% 31.0 0s * 164 115 19 46.0000000 8.47566 81.6% 30.9 0s * 211 141 28 43.0000000 10.07060 76.6% 30.7 0s * 482 266 19 41.0000000 15.21201 62.9% 28.1 0s H 514 271 40.0000000 15.70941 60.7% 27.6 0s * 515 256 19 39.0000000 15.70941 59.7% 27.6 0s 4701 446 cutoff 25 39.00000 28.71875 26.4% 24.8 5s Explored 8176 nodes (187017 simplex iterations) in 7.64 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.900000000000e+01, best bound 3.900000000000e+01, gap 0.0%