Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:37:28 2013 Optimize a model with 64880 rows, 64080 columns and 256080 nonzeros Presolve removed 3947 rows and 0 columns Presolve time: 0.41s Presolved: 60933 rows, 64080 columns, 248186 nonzeros Variable types: 64000 continuous, 80 integer (80 binary) Root relaxation: objective 1.025496e+05, 14551 iterations, 3.23 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 102549.587 0 3 - 102549.587 - - 3s H 0 0 102689.00000 102549.587 0.14% - 3s 0 0 102550.925 0 4 102689.000 102550.925 0.13% - 4s 0 0 102550.925 0 3 102689.000 102550.925 0.13% - 6s 0 0 102551.656 0 4 102689.000 102551.656 0.13% - 6s 0 0 102615.254 0 2 102689.000 102615.254 0.07% - 7s H 0 0 102657.00000 102615.254 0.04% - 7s 0 2 102640.000 0 1 102657.000 102640.000 0.02% - 8s * 2 0 1 102649.00000 102649.000 0.0% 42.5 8s Cutting planes: Gomory: 1 Explored 3 nodes (19975 simplex iterations) in 8.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.026490000000e+05, best bound 1.026490000000e+05, gap 0.0%