Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:14:02 2012 Optimize a model with 757 rows, 175 columns and 1514 nonzeros Presolve removed 165 rows and 0 columns Presolve time: 0.01s Presolved: 592 rows, 175 columns, 1300 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 7.250000e+01, 257 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72.50000 0 143 54.00000 72.50000 34.3% - 0s 0 0 70.57143 0 157 54.00000 70.57143 30.7% - 0s 0 0 69.86940 0 171 54.00000 69.86940 29.4% - 0s 0 0 69.18387 0 173 54.00000 69.18387 28.1% - 0s 0 0 68.23798 0 171 54.00000 68.23798 26.4% - 0s 0 0 67.64944 0 169 54.00000 67.64944 25.3% - 0s 0 0 67.35906 0 172 54.00000 67.35906 24.7% - 0s 0 0 66.83095 0 174 54.00000 66.83095 23.8% - 0s 0 0 66.47483 0 172 54.00000 66.47483 23.1% - 0s H 0 0 55.0000000 66.47483 20.9% - 0s 0 0 66.37143 0 173 55.00000 66.37143 20.7% - 0s 0 0 66.29973 0 173 55.00000 66.29973 20.5% - 0s 0 0 66.22311 0 173 55.00000 66.22311 20.4% - 0s 0 0 66.15318 0 173 55.00000 66.15318 20.3% - 0s 0 0 66.09590 0 173 55.00000 66.09590 20.2% - 0s 0 0 66.09590 0 173 55.00000 66.09590 20.2% - 0s H 0 0 56.0000000 66.09590 18.0% - 0s H 0 0 57.0000000 66.09590 16.0% - 0s 0 2 66.09147 0 173 57.00000 66.09147 15.9% - 0s * 79 29 11 58.0000000 65.61827 13.1% 52.7 0s H 81 25 59.0000000 65.61827 11.2% 51.4 0s 613 141 62.95709 9 174 59.00000 63.26548 7.23% 50.8 5s 692 180 63.26548 23 154 59.00000 63.26548 7.23% 59.0 10s Cutting planes: Gomory: 2 Zero half: 262 Explored 2250 nodes (113858 simplex iterations) in 14.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%