Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:08:42 2013 Optimize a model with 4991 rows, 961 columns and 15376 nonzeros Presolve removed 1202 rows and 510 columns Presolve time: 0.04s Presolved: 3789 rows, 451 columns, 11757 nonzeros Variable types: 14 continuous, 437 integer (437 binary) Found heuristic solution: objective 15186.000000 Root relaxation: objective 1.083728e+04, 2400 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10837.2833 0 9 15186.0000 10837.2833 28.6% - 0s H 0 0 10846.000000 10837.2833 0.08% - 0s H 0 0 10842.000000 10837.2833 0.04% - 0s 0 0 10838.4487 0 16 10842.0000 10838.4487 0.03% - 0s 0 0 10838.4487 0 7 10842.0000 10838.4487 0.03% - 0s 0 0 10838.6924 0 16 10842.0000 10838.6924 0.03% - 0s 0 0 10839.1311 0 23 10842.0000 10839.1311 0.03% - 0s 0 0 10839.5941 0 26 10842.0000 10839.5941 0.02% - 0s 0 0 10840.1077 0 22 10842.0000 10840.1077 0.02% - 0s 0 0 10840.2493 0 28 10842.0000 10840.2493 0.02% - 0s 0 0 10840.3443 0 29 10842.0000 10840.3443 0.02% - 0s 0 0 10840.4492 0 27 10842.0000 10840.4492 0.01% - 0s 0 0 10840.5109 0 29 10842.0000 10840.5109 0.01% - 0s 0 0 10840.5945 0 27 10842.0000 10840.5945 0.01% - 0s 0 1 10840.6892 0 27 10842.0000 10840.6892 0.01% - 0s Explored 3 nodes (2695 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.084200000000e+04, best bound 1.084200000000e+04, gap 0.0%