Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:55:56 2013 Optimize a model with 26289 rows, 2916 columns and 80190 nonzeros Presolve removed 2385 rows and 1482 columns Presolve time: 0.19s Presolved: 23904 rows, 1434 columns, 72783 nonzeros Variable types: 21 continuous, 1413 integer (1413 binary) Found heuristic solution: objective 72765.000000 Root relaxation: objective 5.807196e+04, 4881 iterations, 0.29 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58071.9600 0 8 72765.0000 58071.9600 20.2% - 0s H 0 0 58077.000000 58071.9600 0.01% - 0s Explored 0 nodes (4905 simplex iterations) in 0.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.807700000000e+04, best bound 5.807200000000e+04, gap 0.0086%