Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:59 2012 Optimize a model with 570 rows, 154 columns and 1140 nonzeros Presolve removed 116 rows and 0 columns Presolve time: 0.00s Presolved: 454 rows, 154 columns, 982 nonzeros Variable types: 0 continuous, 154 integer (154 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 6.466667e+01, 238 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.66667 0 127 53.00000 64.66667 22.0% - 0s 0 0 62.75000 0 141 53.00000 62.75000 18.4% - 0s 0 0 62.65047 0 147 53.00000 62.65047 18.2% - 0s H 0 0 54.0000000 62.65047 16.0% - 0s H 0 0 55.0000000 62.65047 13.9% - 0s 0 0 62.00000 0 147 55.00000 62.00000 12.7% - 0s H 0 0 56.0000000 62.00000 10.7% - 0s 0 0 61.76555 0 146 56.00000 61.76555 10.3% - 0s 0 0 61.37835 0 146 56.00000 61.37835 9.60% - 0s 0 0 61.12558 0 146 56.00000 61.12558 9.15% - 0s 0 0 61.04879 0 149 56.00000 61.04879 9.02% - 0s 0 0 60.89105 0 151 56.00000 60.89105 8.73% - 0s 0 0 60.83080 0 152 56.00000 60.83080 8.63% - 0s 0 0 60.75832 0 152 56.00000 60.75832 8.50% - 0s 0 0 60.71230 0 152 56.00000 60.71230 8.41% - 0s 0 0 60.68588 0 151 56.00000 60.68588 8.37% - 0s 0 0 60.67269 0 151 56.00000 60.67269 8.34% - 0s 0 0 60.67269 0 150 56.00000 60.67269 8.34% - 0s 0 2 60.66992 0 150 56.00000 60.66992 8.34% - 0s H 6 6 57.0000000 60.66834 6.44% 52.0 0s Cutting planes: Zero half: 104 Explored 112 nodes (5807 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%