Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:55:53 2013 Optimize a model with 4089 rows, 841 columns and 12615 nonzeros Presolve removed 926 rows and 443 columns Presolve time: 0.03s Presolved: 3163 rows, 398 columns, 9798 nonzeros Variable types: 12 continuous, 386 integer (386 binary) Found heuristic solution: objective 16443.000000 Root relaxation: objective 1.245706e+04, 1546 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12457.0568 0 9 16443.0000 12457.0568 24.2% - 0s H 0 0 12468.000000 12457.0568 0.09% - 0s H 0 0 12465.000000 12457.0568 0.06% - 0s 0 0 12459.1752 0 12 12465.0000 12459.1752 0.05% - 0s 0 0 12459.1752 0 6 12465.0000 12459.1752 0.05% - 0s 0 0 12459.4564 0 13 12465.0000 12459.4564 0.04% - 0s 0 1 12459.9845 0 13 12465.0000 12459.9845 0.04% - 0s Explored 5 nodes (1642 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.246500000000e+04, best bound 1.246500000000e+04, gap 0.0%