Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:32:22 2013 Optimize a model with 792 rows, 51912 columns and 103752 nonzeros Presolve time: 0.08s Presolved: 792 rows, 51912 columns, 103752 nonzeros Variable types: 51840 continuous, 72 integer (72 binary) Root relaxation: objective 8.301482e+04, 1825 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 83014.8164 0 6 - 83014.8164 - - 0s H 0 0 85471.000000 83014.8164 2.87% - 0s H 0 0 83853.000000 83014.8164 1.00% - 0s 0 0 83438.7279 0 5 83853.0000 83438.7279 0.49% - 0s 0 0 83499.6744 0 4 83853.0000 83499.6744 0.42% - 0s 0 0 83499.6744 0 6 83853.0000 83499.6744 0.42% - 0s 0 0 83499.6744 0 5 83853.0000 83499.6744 0.42% - 0s 0 0 83499.6744 0 5 83853.0000 83499.6744 0.42% - 0s 0 0 83507.7748 0 4 83853.0000 83507.7748 0.41% - 1s 0 0 83509.4802 0 4 83853.0000 83509.4802 0.41% - 1s 0 0 83509.9687 0 4 83853.0000 83509.9687 0.41% - 1s H 0 0 83663.000000 83509.9687 0.18% - 1s 0 2 83510.1719 0 4 83663.0000 83510.1719 0.18% - 1s Cutting planes: Implied bound: 74 Flow cover: 2 Explored 17 nodes (4870 simplex iterations) in 1.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.366300000000e+04, best bound 8.365490909091e+04, gap 0.0097%