Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:34:06 2013 Optimize a model with 660 rows, 36060 columns and 72060 nonzeros Presolve time: 0.05s Presolved: 660 rows, 36060 columns, 72060 nonzeros Variable types: 36000 continuous, 60 integer (60 binary) Root relaxation: objective 5.362451e+04, 1005 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53624.5068 0 11 - 53624.5068 - - 0s H 0 0 58581.000000 53624.5068 8.46% - 0s 0 0 53895.7708 0 9 58581.0000 53895.7708 8.00% - 0s H 0 0 58448.547516 53895.7708 7.79% - 0s H 0 0 57718.000000 53895.7708 6.62% - 0s H 0 0 54148.000000 53895.7708 0.47% - 0s 0 0 53943.5885 0 7 54148.0000 53943.5885 0.38% - 0s 0 0 53943.5885 0 11 54148.0000 53943.5885 0.38% - 0s 0 0 53943.5885 0 9 54148.0000 53943.5885 0.38% - 0s 0 0 53943.5885 0 7 54148.0000 53943.5885 0.38% - 0s 0 0 53954.1125 0 7 54148.0000 53954.1125 0.36% - 0s 0 0 53959.5402 0 7 54148.0000 53959.5402 0.35% - 0s 0 0 53961.5658 0 6 54148.0000 53961.5658 0.34% - 0s 0 0 53961.5658 0 6 54148.0000 53961.5658 0.34% - 0s 0 0 53961.5658 0 6 54148.0000 53961.5658 0.34% - 0s 0 0 54040.2978 0 7 54148.0000 54040.2978 0.20% - 0s 0 0 54046.1267 0 5 54148.0000 54046.1267 0.19% - 0s 0 2 54053.6375 0 5 54148.0000 54053.6375 0.17% - 1s * 6 1 6 54117.000000 54117.0000 0.0% 17.3 1s Cutting planes: Implied bound: 88 Flow cover: 5 Explored 7 nodes (2644 simplex iterations) in 1.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.411700000000e+04, best bound 5.411700000000e+04, gap 0.0%