Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:13:34 2013 Optimize a model with 1400 rows, 30500 columns and 96250 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.13s Presolved: 1350 rows, 30450 columns, 91200 nonzeros Variable types: 30100 continuous, 350 integer (350 binary) Root relaxation: objective 2.252562e+05, 3282 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 225256.157 0 3 - 225256.157 - - 0s 0 0 225278.265 0 6 - 225278.265 - - 0s 0 0 225278.587 0 6 - 225278.587 - - 0s 0 0 225278.587 0 6 - 225278.587 - - 0s 0 2 225302.824 0 6 - 225302.824 - - 1s * 94 62 92 226520.88508 225505.706 0.45% 11.2 4s * 108 2 11 225915.15199 225700.955 0.09% 15.6 4s Cutting planes: Flow cover: 3 Explored 110 nodes (5387 simplex iterations) in 4.79 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.259151519913e+05, best bound 2.258980110937e+05, gap 0.0076%