Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:32:32 2013 Optimize a model with 1266 rows, 27477 columns and 1317829 nonzeros Presolve removed 64 rows and 432 columns Presolve time: 4.15s Presolved: 1202 rows, 27045 columns, 1295862 nonzeros Variable types: 0 continuous, 27045 integer (27045 binary) Found heuristic solution: objective 16010.000000 Root relaxation: objective 9.835333e+03, 6942 iterations, 3.71 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9835.33333 0 58 16010.0000 9835.33333 38.6% - 8s H 0 0 10052.000000 9835.33333 2.16% - 10s * 0 0 0 9838.0000000 9838.00000 0.0% - 11s Cutting planes: Clique: 3 Zero half: 37 Explored 0 nodes (7780 simplex iterations) in 11.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.838000000000e+03, best bound 9.838000000000e+03, gap 0.0%