Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:34:24 2013 Optimize a model with 1500 rows, 35550 columns and 151400 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.20s Presolved: 1450 rows, 35500 columns, 141350 nonzeros Variable types: 35100 continuous, 400 integer (400 binary) Root relaxation: objective 2.208160e+05, 2492 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 220815.985 0 12 - 220815.985 - - 0s 0 0 220826.586 0 12 - 220826.586 - - 0s 0 0 220828.753 0 12 - 220828.753 - - 0s 0 0 220828.753 0 12 - 220828.753 - - 0s 0 0 220828.753 0 12 - 220828.753 - - 1s 0 2 220837.684 0 12 - 220837.684 - - 2s * 38 20 36 221476.98579 221041.643 0.20% 24.6 3s * 64 25 26 221476.74799 221165.837 0.14% 21.8 3s Cutting planes: Flow cover: 8 Explored 139 nodes (5832 simplex iterations) in 4.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.214767479854e+05, best bound 2.214551691791e+05, gap 0.0097%