Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:57:35 2012 Optimize a model with 741 rows, 168 columns and 1482 nonzeros Presolve removed 189 rows and 3 columns Presolve time: 0.00s Presolved: 552 rows, 165 columns, 1213 nonzeros Variable types: 0 continuous, 165 integer (165 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.557143e+01, 330 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.57143 0 141 46.00000 65.57143 42.5% - 0s H 0 0 53.0000000 65.57143 23.7% - 0s 0 0 64.83784 0 156 53.00000 64.83784 22.3% - 0s 0 0 64.26094 0 163 53.00000 64.26094 21.2% - 0s 0 0 63.91918 0 159 53.00000 63.91918 20.6% - 0s 0 0 63.54224 0 162 53.00000 63.54224 19.9% - 0s 0 0 63.22811 0 162 53.00000 63.22811 19.3% - 0s 0 0 63.07338 0 157 53.00000 63.07338 19.0% - 0s 0 0 62.96220 0 162 53.00000 62.96220 18.8% - 0s 0 0 62.86571 0 162 53.00000 62.86571 18.6% - 0s 0 0 62.72352 0 162 53.00000 62.72352 18.3% - 0s 0 0 62.56152 0 163 53.00000 62.56152 18.0% - 0s 0 0 62.51868 0 162 53.00000 62.51868 18.0% - 0s 0 0 62.49142 0 162 53.00000 62.49142 17.9% - 0s 0 0 62.49142 0 161 53.00000 62.49142 17.9% - 0s 0 2 62.49072 0 161 53.00000 62.49072 17.9% - 0s H 358 164 54.0000000 60.36130 11.8% 39.1 0s H 497 167 55.0000000 60.14286 9.35% 37.6 0s 616 221 59.85012 12 158 55.00000 59.85012 8.82% 40.2 5s 4389 51 cutoff 25 55.00000 56.20000 2.18% 28.7 10s Cutting planes: Gomory: 4 Zero half: 65 Mod-K: 1 Explored 4454 nodes (128181 simplex iterations) in 10.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%