Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:56:44 2012 Optimize a model with 423 rows, 307 columns and 1362 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 423 rows, 306 columns, 1361 nonzeros Variable types: 0 continuous, 306 integer (305 binary) Found heuristic solution: objective 85.0000000 Root relaxation: objective 0.000000e+00, 135 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 94 85.00000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s 0 0 0.36165 0 96 75.00000 0.36165 100% - 0s H 0 0 72.0000000 0.36165 99.5% - 0s 0 0 0.87563 0 99 72.00000 0.87563 98.8% - 0s H 0 0 70.0000000 0.87563 98.7% - 0s 0 0 0.87700 0 100 70.00000 0.87700 98.7% - 0s 0 0 0.87700 0 100 70.00000 0.87700 98.7% - 0s H 0 0 63.0000000 0.87700 98.6% - 0s H 0 0 60.0000000 0.87700 98.5% - 0s H 0 0 59.0000000 0.87700 98.5% - 0s 0 2 1.00000 0 100 59.00000 1.00000 98.3% - 0s H 48 47 51.0000000 1.17493 97.7% 29.7 0s * 52 47 31 50.0000000 1.17493 97.7% 28.7 0s * 101 88 29 49.0000000 2.37055 95.2% 29.4 0s * 257 213 31 48.0000000 3.54667 92.6% 29.6 0s H 270 189 44.0000000 3.87500 91.2% 29.6 0s H 434 318 42.0000000 4.64680 88.9% 30.4 0s * 669 392 28 41.0000000 6.57143 84.0% 31.3 1s H 2580 520 40.0000000 24.63158 38.4% 25.1 3s * 4135 669 26 39.0000000 28.07692 28.0% 23.6 4s 4340 672 cutoff 20 39.00000 28.33333 27.4% 23.3 5s * 9025 443 27 38.0000000 32.85000 13.6% 20.8 8s Explored 10177 nodes (208339 simplex iterations) in 9.47 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.800000000000e+01, best bound 3.800000000000e+01, gap 0.0%