Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:24 2013 Optimize a model with 320 rows, 4160 columns and 8340 nonzeros Presolve removed 40 rows and 60 columns Presolve time: 0.01s Presolved: 280 rows, 4100 columns, 8200 nonzeros Variable types: 4080 continuous, 20 integer (20 binary) Root relaxation: objective 3.600389e+04, 326 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36003.8892 0 2 - 36003.8892 - - 0s H 0 0 38544.555741 36003.8892 6.59% - 0s H 0 0 36188.506204 36003.8892 0.51% - 0s 0 0 36070.7952 0 2 36188.5062 36070.7952 0.33% - 0s 0 0 36110.5802 0 2 36188.5062 36110.5802 0.22% - 0s 0 0 36114.6472 0 2 36188.5062 36114.6472 0.20% - 0s 0 0 36121.2589 0 2 36188.5062 36121.2589 0.19% - 0s 0 0 36126.6115 0 2 36188.5062 36126.6115 0.17% - 0s 0 0 36126.6115 0 2 36188.5062 36126.6115 0.17% - 0s 0 0 36126.6643 0 2 36188.5062 36126.6643 0.17% - 0s Cutting planes: Flow cover: 12 Explored 0 nodes (445 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.618850620407e+04, best bound 3.618850620407e+04, gap 0.0%