Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:27:30 2013 Optimize a model with 2570 rows, 7760 columns and 20505 nonzeros Presolve removed 10 rows and 15 columns Presolve time: 0.22s Presolved: 2560 rows, 7745 columns, 15490 nonzeros Variable types: 5250 continuous, 2495 integer (2495 binary) Root relaxation: objective 1.174557e+04, 38 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11745.5748 0 1 - 11745.5748 - - 0s 0 0 11745.7071 0 2 - 11745.7071 - - 0s 0 0 11745.7123 0 2 - 11745.7123 - - 0s 0 0 11745.7123 0 2 - 11745.7123 - - 0s H 0 0 12152.685980 11745.7123 3.35% - 0s 0 2 11746.5178 0 2 12152.6860 11746.5178 3.34% - 0s H 27 26 11784.965979 11774.2630 0.09% 1.4 1s H 54 21 11779.771034 11774.5464 0.04% 1.6 1s Cutting planes: Gomory: 1 Flow cover: 2 Explored 202 nodes (892 simplex iterations) in 1.42 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.177977103412e+04, best bound 1.177868734963e+04, gap 0.0092%