Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:13:59 2013 Optimize a model with 27612 rows, 27092 columns and 108212 nonzeros Presolve removed 1027 rows and 0 columns Presolve time: 0.16s Presolved: 26585 rows, 27092 columns, 106158 nonzeros Variable types: 27040 continuous, 52 integer (52 binary) Root relaxation: objective 6.044334e+04, 5395 iterations, 0.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 60443.3424 0 3 - 60443.3424 - - 0s H 0 0 61053.000000 60443.3424 1.00% - 0s 0 0 60444.6089 0 5 61053.0000 60444.6089 1.00% - 1s H 0 0 61007.000000 60444.6089 0.92% - 1s 0 0 60444.6089 0 5 61007.0000 60444.6089 0.92% - 1s 0 2 60446.4129 0 5 61007.0000 60446.4129 0.92% - 2s H 3 3 60689.000000 60517.8519 0.28% 101 2s H 4 3 60633.772727 60525.2441 0.18% 95.8 2s * 6 2 5 60599.000000 60529.0833 0.12% 104 2s * 8 0 1 60538.000000 60538.0000 0.0% 84.8 2s Cutting planes: Gomory: 2 Flow cover: 2 Explored 9 nodes (6094 simplex iterations) in 2.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.053800000000e+04, best bound 6.053800000000e+04, gap 0.0%