Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:02:45 2013 Optimize a model with 737 rows, 44957 columns and 89847 nonzeros Presolve time: 0.06s Presolved: 737 rows, 44957 columns, 89847 nonzeros Variable types: 44890 continuous, 67 integer (67 binary) Root relaxation: objective 6.807987e+04, 1395 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 68079.8674 0 12 - 68079.8674 - - 0s H 0 0 73999.000000 68079.8674 8.00% - 0s H 0 0 69530.000000 68079.8674 2.09% - 0s 0 0 68529.7303 0 6 69530.0000 68529.7303 1.44% - 0s 0 0 68540.2711 0 4 69530.0000 68540.2711 1.42% - 0s 0 0 68546.8535 0 4 69530.0000 68546.8535 1.41% - 0s 0 0 68547.7205 0 8 69530.0000 68547.7205 1.41% - 0s 0 0 68550.4483 0 4 69530.0000 68550.4483 1.41% - 0s 0 0 68550.4483 0 4 69530.0000 68550.4483 1.41% - 0s 0 0 68550.4483 0 4 69530.0000 68550.4483 1.41% - 0s H 0 0 68784.000000 68550.4483 0.34% - 0s 0 0 68550.4483 0 12 68784.0000 68550.4483 0.34% - 1s 0 0 68550.4483 0 6 68784.0000 68550.4483 0.34% - 1s 0 0 68550.4483 0 4 68784.0000 68550.4483 0.34% - 1s 0 0 68550.4483 0 4 68784.0000 68550.4483 0.34% - 1s 0 0 68550.4483 0 8 68784.0000 68550.4483 0.34% - 1s 0 0 68550.4483 0 4 68784.0000 68550.4483 0.34% - 1s 0 0 68550.4483 0 4 68784.0000 68550.4483 0.34% - 1s 0 0 68550.4483 0 4 68784.0000 68550.4483 0.34% - 1s 0 2 68550.8071 0 4 68784.0000 68550.8071 0.34% - 1s * 34 0 8 68769.000000 68769.0000 0.0% 41.6 2s Cutting planes: Implied bound: 137 Flow cover: 8 Explored 35 nodes (4629 simplex iterations) in 2.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.876900000000e+04, best bound 6.876900000000e+04, gap 0.0%