Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:04:00 2013 Optimize a model with 57225 rows, 4900 columns and 173950 nonzeros Presolve removed 3387 rows and 2464 columns Presolve time: 0.41s Presolved: 53838 rows, 2436 columns, 163859 nonzeros Variable types: 35 continuous, 2401 integer (2401 binary) Found heuristic solution: objective 91564.000000 Root relaxation: objective 6.444000e+04, 20579 iterations, 2.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64440.0000 0 15 91564.0000 64440.0000 29.6% - 2s H 0 0 64455.000000 64440.0000 0.02% - 2s 0 0 64440.4246 0 52 64455.0000 64440.4246 0.02% - 3s 0 0 64440.4246 0 18 64455.0000 64440.4246 0.02% - 3s H 0 0 64454.000000 64440.4246 0.02% - 3s 0 0 64440.4251 0 56 64454.0000 64440.4251 0.02% - 3s H 0 0 64453.000000 64440.4251 0.02% - 3s 0 2 64440.5673 0 50 64453.0000 64440.5673 0.02% - 4s 10 8 64440.7001 0 72 64453.0000 64440.7001 0.02% 8.5 5s H 10 7 64451.000000 64440.7001 0.02% 8.5 5s H 10 6 64450.000000 64440.7001 0.01% 8.5 5s H 65 49 64447.000000 64440.8801 0.01% 134 6s Cutting planes: Gomory: 3 MIR: 30 Zero half: 5 Explored 65 nodes (33943 simplex iterations) in 6.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.444700000000e+04, best bound 6.444100000000e+04, gap 0.0093%