Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:47:54 2012 Optimize a model with 699 rows, 163 columns and 1398 nonzeros Presolve removed 141 rows and 0 columns Presolve time: 0.00s Presolved: 558 rows, 163 columns, 1211 nonzeros Variable types: 0 continuous, 163 integer (163 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.550000e+01, 284 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.50000 0 129 48.00000 65.50000 36.5% - 0s 0 0 64.29487 0 159 48.00000 64.29487 33.9% - 0s H 0 0 51.0000000 64.29487 26.1% - 0s 0 0 63.33171 0 160 51.00000 63.33171 24.2% - 0s 0 0 62.36158 0 162 51.00000 62.36158 22.3% - 0s 0 0 62.03882 0 161 51.00000 62.03882 21.6% - 0s 0 0 61.76534 0 157 51.00000 61.76534 21.1% - 0s 0 0 61.47050 0 161 51.00000 61.47050 20.5% - 0s 0 0 61.26881 0 158 51.00000 61.26881 20.1% - 0s 0 0 61.04353 0 162 51.00000 61.04353 19.7% - 0s 0 0 60.99905 0 162 51.00000 60.99905 19.6% - 0s 0 0 60.84113 0 163 51.00000 60.84113 19.3% - 0s 0 0 60.78900 0 162 51.00000 60.78900 19.2% - 0s 0 0 60.67463 0 162 51.00000 60.67463 19.0% - 0s 0 0 60.66965 0 161 51.00000 60.66965 19.0% - 0s 0 0 60.66731 0 161 51.00000 60.66731 19.0% - 0s 0 0 60.66731 0 159 51.00000 60.66731 19.0% - 0s 0 2 60.66602 0 159 51.00000 60.66602 19.0% - 0s H 11 11 52.0000000 60.66602 16.7% 72.6 0s * 21 13 11 53.0000000 60.66602 14.5% 46.5 0s H 385 106 54.0000000 58.69335 8.69% 48.3 0s 616 165 57.89579 16 145 54.00000 57.89579 7.21% 48.1 5s Cutting planes: Gomory: 3 Zero half: 73 Explored 3409 nodes (116714 simplex iterations) in 9.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%