Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:52:38 2013 Optimize a model with 12383 rows, 1764 columns and 37926 nonzeros Presolve removed 2542 rows and 935 columns Presolve time: 0.08s Presolved: 9841 rows, 829 columns, 30028 nonzeros Variable types: 13 continuous, 816 integer (816 binary) Found heuristic solution: objective 40258.000000 Root relaxation: objective 3.501644e+04, 2417 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35016.4385 0 6 40258.0000 35016.4385 13.0% - 0s H 0 0 35026.000000 35016.4385 0.03% - 0s 0 0 35021.3984 0 19 35026.0000 35021.3984 0.01% - 0s 0 0 35021.3984 0 7 35026.0000 35021.3984 0.01% - 0s 0 0 35021.3984 0 19 35026.0000 35021.3984 0.01% - 0s 0 1 35021.4857 0 19 35026.0000 35021.4857 0.01% - 0s Cutting planes: Gomory: 3 Implied bound: 3 MIR: 7 Explored 4 nodes (2555 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.502600000000e+04, best bound 3.502600000000e+04, gap 0.0%