Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:51 2013 Optimize a model with 220 rows, 4020 columns and 8020 nonzeros Presolve time: 0.00s Presolved: 220 rows, 4020 columns, 8020 nonzeros Variable types: 4000 continuous, 20 integer (20 binary) Root relaxation: objective 1.862429e+04, 136 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18624.2898 0 5 - 18624.2898 - - 0s H 0 0 18766.000000 18624.2898 0.76% - 0s 0 0 18739.5140 0 4 18766.0000 18739.5140 0.14% - 0s H 0 0 18747.000000 18739.5140 0.04% - 0s 0 0 18746.0198 0 1 18747.0000 18746.0198 0.01% - 0s Cutting planes: Implied bound: 43 Flow cover: 9 Explored 0 nodes (183 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.874700000000e+04, best bound 1.874601980198e+04, gap 0.0052%