Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:17:36 2013 Optimize a model with 800 rows, 25400 columns and 50850 nonzeros Presolve removed 100 rows and 150 columns Presolve time: 0.13s Presolved: 700 rows, 25250 columns, 50500 nonzeros Variable types: 25200 continuous, 50 integer (50 binary) Root relaxation: objective 1.749223e+05, 1929 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 174922.321 0 2 - 174922.321 - - 0s H 0 0 181970.74324 174922.321 3.87% - 0s 0 0 174945.093 0 2 181970.743 174945.093 3.86% - 0s 0 0 174958.761 0 2 181970.743 174958.761 3.85% - 0s 0 0 174958.761 0 2 181970.743 174958.761 3.85% - 0s 0 0 174958.761 0 2 181970.743 174958.761 3.85% - 0s 0 2 174961.242 0 2 181970.743 174961.242 3.85% - 0s * 3 3 3 175375.29777 175316.379 0.03% 49.3 0s Cutting planes: Flow cover: 5 Explored 7 nodes (2310 simplex iterations) in 0.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.753752977696e+05, best bound 1.753752977696e+05, gap 0.0%