Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:54:04 2013 Optimize a model with 17343 rows, 2209 columns and 53016 nonzeros Presolve removed 2141 rows and 1133 columns Presolve time: 0.13s Presolved: 15202 rows, 1076 columns, 46439 nonzeros Variable types: 19 continuous, 1057 integer (1057 binary) Found heuristic solution: objective 48664.000000 Root relaxation: objective 3.640845e+04, 4688 iterations, 0.20 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36408.4536 0 9 48664.0000 36408.4536 25.2% - 0s H 0 0 36432.000000 36408.4536 0.06% - 0s H 0 0 36415.000000 36408.4536 0.02% - 0s 0 0 36409.6743 0 18 36415.0000 36409.6743 0.01% - 0s 0 0 36409.6743 0 9 36415.0000 36409.6743 0.01% - 0s 0 0 36409.6768 0 18 36415.0000 36409.6768 0.01% - 0s 0 0 36409.9825 0 25 36415.0000 36409.9825 0.01% - 0s 0 0 36410.0983 0 28 36415.0000 36410.0983 0.01% - 0s 0 0 36410.3067 0 28 36415.0000 36410.3067 0.01% - 0s 0 0 36410.4005 0 33 36415.0000 36410.4005 0.01% - 0s 0 2 36410.5299 0 33 36415.0000 36410.5299 0.01% - 0s H 1 2 36411.000000 36410.5299 0.00% 0.0 0s Explored 2 nodes (4938 simplex iterations) in 0.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.641100000000e+04, best bound 3.641100000000e+04, gap 0.0%