Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:09:31 2013 Optimize a model with 76153 rows, 5929 columns and 231231 nonzeros Presolve removed 7229 rows and 3031 columns Presolve time: 0.70s Presolved: 68924 rows, 2898 columns, 209065 nonzeros Variable types: 31 continuous, 2867 integer (2867 binary) Found heuristic solution: objective 121129.00000 Root relaxation: objective 9.175517e+04, 16217 iterations, 1.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 91755.1688 0 11 121129.000 91755.1688 24.3% - 2s H 0 0 91763.000000 91755.1688 0.01% - 2s Explored 0 nodes (16253 simplex iterations) in 2.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.176300000000e+04, best bound 9.175600000000e+04, gap 0.0076%