Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:35:42 2012 Optimize a model with 560 rows, 150 columns and 1120 nonzeros Presolve removed 125 rows and 3 columns Presolve time: 0.00s Presolved: 435 rows, 147 columns, 932 nonzeros Variable types: 0 continuous, 147 integer (147 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.200000e+01, 192 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62.00000 0 110 46.00000 62.00000 34.8% - 0s 0 0 61.16667 0 135 46.00000 61.16667 33.0% - 0s 0 0 60.06338 0 147 46.00000 60.06338 30.6% - 0s H 0 0 49.0000000 60.06338 22.6% - 0s 0 0 59.45915 0 146 49.00000 59.45915 21.3% - 0s 0 0 59.27419 0 147 49.00000 59.27419 21.0% - 0s H 0 0 51.0000000 59.27419 16.2% - 0s 0 0 59.05826 0 143 51.00000 59.05826 15.8% - 0s 0 0 58.89226 0 147 51.00000 58.89226 15.5% - 0s 0 0 58.71392 0 147 51.00000 58.71392 15.1% - 0s 0 0 58.54731 0 145 51.00000 58.54731 14.8% - 0s 0 0 58.49669 0 147 51.00000 58.49669 14.7% - 0s 0 0 58.47817 0 146 51.00000 58.47817 14.7% - 0s 0 0 58.47621 0 147 51.00000 58.47621 14.7% - 0s 0 0 58.47621 0 147 51.00000 58.47621 14.7% - 0s 0 2 58.46826 0 147 51.00000 58.46826 14.6% - 0s * 39 18 8 52.0000000 58.35361 12.2% 38.1 0s 955 175 53.33333 18 95 52.00000 55.16667 6.09% 34.4 5s H 1723 9 53.0000000 54.00000 1.89% 30.1 5s Cutting planes: Gomory: 6 Zero half: 58 Explored 1737 nodes (53237 simplex iterations) in 5.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%