Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:22 2013 Optimize a model with 52 rows, 158 columns and 924 nonzeros Presolve removed 22 rows and 26 columns Presolve time: 0.00s Presolved: 30 rows, 132 columns, 774 nonzeros Variable types: 120 continuous, 12 integer (12 binary) Root relaxation: objective 4.440467e+03, 12 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4440.46714 0 3 - 4440.46714 - - 0s 0 0 4445.09455 0 4 - 4445.09455 - - 0s 0 0 4445.15838 0 4 - 4445.15838 - - 0s 0 0 4446.78799 0 3 - 4446.78799 - - 0s 0 0 4458.13217 0 3 - 4458.13217 - - 0s 0 0 4458.56825 0 3 - 4458.56825 - - 0s 0 0 4458.56825 0 3 - 4458.56825 - - 0s H 0 0 4458.9368320 4458.56825 0.01% - 0s Cutting planes: Flow cover: 1 Explored 0 nodes (53 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.458936831960e+03, best bound 4.458568253702e+03, gap 0.0083%