Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:28:26 2013 Optimize a model with 1167 rows, 24441 columns and 1134599 nonzeros Presolve removed 32 rows and 165 columns Presolve time: 2.77s Presolved: 1135 rows, 24276 columns, 1126624 nonzeros Variable types: 0 continuous, 24276 integer (24276 binary) Found heuristic solution: objective 14010.000000 Root relaxation: objective 8.535667e+03, 5627 iterations, 2.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8535.66667 0 65 14010.0000 8535.66667 39.1% - 6s H 0 0 8680.0000000 8535.66667 1.66% - 7s H 0 0 8607.0000000 8535.66667 0.83% - 7s * 0 0 0 8540.0000000 8540.00000 0.0% - 9s Cutting planes: Clique: 5 Zero half: 52 Explored 0 nodes (7213 simplex iterations) in 9.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.540000000000e+03, best bound 8.540000000000e+03, gap 0.0%