Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:30:51 2013 Optimize a model with 1606 rows, 35311 columns and 2206949 nonzeros Presolve removed 104 rows and 829 columns (presolve time = 5s) ... Presolve removed 104 rows and 829 columns Presolve time: 6.45s Presolved: 1502 rows, 34482 columns, 2145759 nonzeros Variable types: 0 continuous, 34482 integer (34482 binary) Found heuristic solution: objective 20125.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7434 1.4824440e+04 9.693339e+02 0.000000e+00 5s 8435 1.4835000e+04 0.000000e+00 0.000000e+00 7s Root relaxation: objective 1.483500e+04, 8435 iterations, 6.78 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 14835.000000 14835.0000 0.0% - 13s Explored 0 nodes (8435 simplex iterations) in 13.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.483500000000e+04, best bound 1.483500000000e+04, gap 0.0%