Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:37:23 2013 Optimize a model with 152193 rows, 9409 columns and 461041 nonzeros Presolve removed 20953 rows and 4912 columns Presolve time: 1.88s Presolved: 131240 rows, 4497 columns, 396068 nonzeros Variable types: 25 continuous, 4472 integer (4472 binary) Found heuristic solution: objective 217967.00000 Root relaxation: objective 1.792243e+05, 12864 iterations, 2.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 179224.348 0 12 217967.000 179224.348 17.8% - 4s H 0 0 179230.00000 179224.348 0.00% - 4s Explored 0 nodes (12890 simplex iterations) in 4.51 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.792300000000e+05, best bound 1.792250000000e+05, gap 0.0028%