Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:57 2013 Optimize a model with 231 rows, 4431 columns and 8841 nonzeros Presolve time: 0.01s Presolved: 231 rows, 4431 columns, 8841 nonzeros Variable types: 4410 continuous, 21 integer (21 binary) Root relaxation: objective 2.314058e+04, 247 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 23140.5782 0 5 - 23140.5782 - - 0s H 0 0 23294.000000 23140.5782 0.66% - 0s 0 0 23172.5900 0 2 23294.0000 23172.5900 0.52% - 0s 0 0 23172.5900 0 2 23294.0000 23172.5900 0.52% - 0s 0 0 23176.9136 0 2 23294.0000 23176.9136 0.50% - 0s 0 0 23176.9136 0 2 23294.0000 23176.9136 0.50% - 0s 0 0 23176.9136 0 2 23294.0000 23176.9136 0.50% - 0s H 0 0 23229.000000 23176.9136 0.22% - 0s 0 1 23222.2500 0 1 23229.0000 23222.2500 0.03% - 0s Cutting planes: Implied bound: 28 Flow cover: 4 Explored 2 nodes (317 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.322900000000e+04, best bound 2.322900000000e+04, gap 0.0%