Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:57:12 2013 Optimize a model with 30913 rows, 3249 columns and 94221 nonzeros Presolve removed 2875 rows and 1654 columns Presolve time: 0.20s Presolved: 28038 rows, 1595 columns, 85300 nonzeros Variable types: 22 continuous, 1573 integer (1573 binary) Found heuristic solution: objective 75832.000000 Root relaxation: objective 5.981770e+04, 6933 iterations, 0.43 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59817.7000 0 7 75832.0000 59817.7000 21.1% - 0s H 0 0 59827.000000 59817.7000 0.02% - 0s H 0 0 59823.000000 59817.7000 0.01% - 0s Explored 0 nodes (7053 simplex iterations) in 0.80 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.982300000000e+04, best bound 5.981800000000e+04, gap 0.0084%