Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:22:14 2013 Optimize a model with 31976 rows, 31416 columns and 125496 nonzeros Presolve removed 1213 rows and 0 columns Presolve time: 0.18s Presolved: 30763 rows, 31416 columns, 123070 nonzeros Variable types: 31360 continuous, 56 integer (56 binary) Root relaxation: objective 5.398125e+04, 4812 iterations, 0.56 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53981.2543 0 3 - 53981.2543 - - 0s H 0 0 54155.000000 53981.2543 0.32% - 0s H 0 0 54082.000000 53981.2543 0.19% - 1s 0 0 53981.6280 0 5 54082.0000 53981.6280 0.19% - 1s 0 0 53981.6280 0 5 54082.0000 53981.6280 0.19% - 1s 0 0 54005.2716 0 4 54082.0000 54005.2716 0.14% - 1s 0 0 54020.6014 0 2 54082.0000 54020.6014 0.11% - 1s H 0 0 54071.000000 54020.6014 0.09% - 1s 0 0 54020.6014 0 2 54071.0000 54020.6014 0.09% - 2s 0 0 54021.0590 0 3 54071.0000 54021.0590 0.09% - 2s 0 0 54024.5128 0 3 54071.0000 54024.5128 0.09% - 2s 0 2 54028.8525 0 3 54071.0000 54028.8525 0.08% - 3s * 7 1 4 54059.000000 54059.0000 0.0% 22.3 3s Cutting planes: Gomory: 1 Explored 8 nodes (6468 simplex iterations) in 3.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.405900000000e+04, best bound 5.405900000000e+04, gap 0.0%