Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:43:04 2012 Optimize a model with 641 rows, 160 columns and 1282 nonzeros Presolve removed 138 rows and 0 columns Presolve time: 0.01s Presolved: 503 rows, 160 columns, 1099 nonzeros Variable types: 0 continuous, 160 integer (160 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 6.650000e+01, 263 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.50000 0 125 53.00000 66.50000 25.5% - 0s 0 0 65.07143 0 152 53.00000 65.07143 22.8% - 0s 0 0 64.35345 0 157 53.00000 64.35345 21.4% - 0s 0 0 63.66887 0 156 53.00000 63.66887 20.1% - 0s 0 0 63.30981 0 154 53.00000 63.30981 19.5% - 0s 0 0 63.00035 0 155 53.00000 63.00035 18.9% - 0s 0 0 62.55736 0 158 53.00000 62.55736 18.0% - 0s 0 0 62.21215 0 158 53.00000 62.21215 17.4% - 0s 0 0 62.03574 0 160 53.00000 62.03574 17.0% - 0s 0 0 62.00335 0 159 53.00000 62.00335 17.0% - 0s 0 0 61.95152 0 159 53.00000 61.95152 16.9% - 0s 0 0 61.89183 0 159 53.00000 61.89183 16.8% - 0s 0 0 61.78545 0 160 53.00000 61.78545 16.6% - 0s 0 0 61.72508 0 160 53.00000 61.72508 16.5% - 0s 0 0 61.62508 0 159 53.00000 61.62508 16.3% - 0s 0 0 61.61260 0 160 53.00000 61.61260 16.3% - 0s 0 0 61.61260 0 159 53.00000 61.61260 16.3% - 0s 0 2 61.61042 0 159 53.00000 61.61042 16.2% - 0s H 10 10 54.0000000 61.59602 14.1% 81.5 0s * 12 12 7 55.0000000 61.59602 12.0% 77.8 0s 616 157 59.10938 12 157 55.00000 59.10938 7.47% 41.4 5s Cutting planes: Gomory: 6 Zero half: 180 Explored 2653 nodes (91070 simplex iterations) in 8.74 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%