Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:56:45 2013 Optimize a model with 1598 rows, 42572 columns and 2179819 nonzeros Presolve removed 38 rows and 227 columns (presolve time = 5s) ... Presolve removed 46 rows and 325 columns (presolve time = 10s) ... Presolve removed 46 rows and 325 columns Presolve time: 10.15s Presolved: 1552 rows, 42247 columns, 2161797 nonzeros Variable types: 0 continuous, 42247 integer (42247 binary) Found heuristic solution: objective 20194.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8521 1.5719801e+04 4.623297e+02 0.000000e+00 5s 12091 1.5777081e+04 9.516931e+01 0.000000e+00 10s 13197 1.5778800e+04 0.000000e+00 0.000000e+00 13s Root relaxation: objective 1.577880e+04, 13197 iterations, 12.80 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15778.8000 0 164 20194.0000 15778.8000 21.9% - 24s H 0 0 17051.000000 15778.8000 7.46% - 25s H 0 0 16873.000000 15778.8000 6.48% - 37s * 0 0 0 15780.000000 15780.0000 0.0% - 44s Cutting planes: Clique: 17 Zero half: 22 Explored 0 nodes (14493 simplex iterations) in 44.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.578000000000e+04, best bound 1.578000000000e+04, gap 0.0%