Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:12 2012 Optimize a model with 515 rows, 138 columns and 1030 nonzeros Presolve removed 107 rows and 0 columns Presolve time: 0.00s Presolved: 408 rows, 138 columns, 881 nonzeros Variable types: 0 continuous, 138 integer (138 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.595000e+01, 285 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55.95000 0 129 46.00000 55.95000 21.6% - 0s H 0 0 48.0000000 55.95000 16.6% - 0s 0 0 55.20000 0 126 48.00000 55.20000 15.0% - 0s 0 0 54.86772 0 129 48.00000 54.86772 14.3% - 0s 0 0 54.56731 0 135 48.00000 54.56731 13.7% - 0s 0 0 54.29646 0 135 48.00000 54.29646 13.1% - 0s 0 0 54.03925 0 138 48.00000 54.03925 12.6% - 0s 0 0 53.77679 0 136 48.00000 53.77679 12.0% - 0s 0 0 53.62069 0 133 48.00000 53.62069 11.7% - 0s 0 0 53.54717 0 131 48.00000 53.54717 11.6% - 0s 0 0 53.48841 0 133 48.00000 53.48841 11.4% - 0s 0 0 53.29703 0 133 48.00000 53.29703 11.0% - 0s 0 0 53.19848 0 136 48.00000 53.19848 10.8% - 0s 0 0 53.16722 0 137 48.00000 53.16722 10.8% - 0s 0 0 53.04854 0 135 48.00000 53.04854 10.5% - 0s 0 0 53.03908 0 135 48.00000 53.03908 10.5% - 0s 0 0 53.03908 0 131 48.00000 53.03908 10.5% - 0s H 0 0 49.0000000 53.03908 8.24% - 0s 0 2 53.02476 0 131 49.00000 53.02476 8.21% - 0s * 62 19 6 50.0000000 52.25000 4.50% 33.0 0s Cutting planes: Gomory: 1 Zero half: 111 Explored 114 nodes (4951 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%