Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:37:45 2013 Optimize a model with 152193 rows, 9409 columns and 461041 nonzeros Presolve removed 7604 rows and 4732 columns Presolve time: 1.78s Presolved: 144589 rows, 4677 columns, 438649 nonzeros Variable types: 52 continuous, 4625 integer (4625 binary) Found heuristic solution: objective 200338.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 29462 1.3346053e+05 0.000000e+00 5.283077e+07 5s 44495 1.4469317e+05 0.000000e+00 0.000000e+00 7s 44495 1.4469317e+05 0.000000e+00 0.000000e+00 7s Root relaxation: objective 1.446932e+05, 44495 iterations, 6.99 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 144693.169 0 12 200338.000 144693.169 27.8% - 9s H 0 0 144706.00000 144693.169 0.01% - 9s Explored 0 nodes (44560 simplex iterations) in 9.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.447060000000e+05, best bound 1.446940000000e+05, gap 0.0083%