Gurobi 5.0.1 (linux64) logging started Thu Nov 29 23:02:21 2012 Optimize a model with 39599 rows, 39204 columns and 234430 nonzeros Presolve removed 197 rows and 1 columns Presolve time: 0.62s Presolved: 39402 rows, 39203 columns, 233642 nonzeros Variable types: 197 continuous, 39006 integer (39006 binary) Found heuristic solution: objective 5179.0000000 Root relaxation: objective 4.537244e+03, 4687 iterations, 0.83 seconds Total elapsed time = 6.48s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4537.24365 0 16 5179.00000 4537.24365 12.4% - 7s 0 0 4541.00000 0 186 5179.00000 4541.00000 12.3% - 8s H 0 0 4541.0000000 4541.00000 0.0% - 8s Cutting planes: Gomory: 2 MIR: 2 Explored 0 nodes (13374 simplex iterations) in 8.77 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.541000000000e+03, best bound 4.541000000000e+03, gap 0.0%