Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:07 2013 Optimize a model with 18963 rows, 18533 columns and 74003 nonzeros Presolve removed 979 rows and 0 columns Presolve time: 0.10s Presolved: 17984 rows, 18533 columns, 72045 nonzeros Variable types: 18490 continuous, 43 integer (43 binary) Root relaxation: objective 4.371140e+04, 2440 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43711.3996 0 5 - 43711.3996 - - 0s H 0 0 44428.000000 43711.3996 1.61% - 0s 0 0 43727.2242 0 6 44428.0000 43727.2242 1.58% - 0s 0 0 43727.5689 0 6 44428.0000 43727.5689 1.58% - 0s H 0 0 43919.000000 43727.5689 0.44% - 0s H 0 0 43914.000000 43727.5689 0.42% - 0s 0 1 43827.7839 0 5 43914.0000 43827.7839 0.20% - 0s * 6 2 4 43900.000000 43884.0000 0.04% 46.2 0s Cutting planes: Gomory: 1 Flow cover: 4 Explored 10 nodes (2806 simplex iterations) in 1.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.390000000000e+04, best bound 4.390000000000e+04, gap 0.0%