Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:22:09 2013 Optimize a model with 113652 rows, 7744 columns and 344608 nonzeros Presolve removed 9886 rows and 3957 columns Presolve time: 1.16s Presolved: 103766 rows, 3787 columns, 313931 nonzeros Variable types: 31 continuous, 3756 integer (3756 binary) Found heuristic solution: objective 189531.00000 Root relaxation: objective 1.518403e+05, 19131 iterations, 2.54 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 151840.348 0 9 189531.000 151840.348 19.9% - 4s H 0 0 151847.00000 151840.348 0.00% - 4s Explored 0 nodes (19153 simplex iterations) in 4.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.518470000000e+05, best bound 1.518410000000e+05, gap 0.0040%