Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:58:48 2013 Optimize a model with 2420 rows, 484220 columns and 968220 nonzeros Presolve time: 1.42s Presolved: 2420 rows, 484220 columns, 968220 nonzeros Variable types: 484000 continuous, 220 integer (220 binary) Root relaxation: objective 4.542256e+05, 14188 iterations, 2.40 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 454225.596 0 6 - 454225.596 - - 4s H 0 0 496721.00000 454225.596 8.56% - 5s H 0 0 454957.00000 454225.596 0.16% - 7s 0 0 454378.024 0 4 454957.000 454378.024 0.13% - 8s 0 0 454378.024 0 6 454957.000 454378.024 0.13% - 11s 0 0 454381.902 0 4 454957.000 454381.902 0.13% - 12s 0 0 454393.914 0 5 454957.000 454393.914 0.12% - 12s 0 0 454394.637 0 3 454957.000 454394.637 0.12% - 12s 0 0 454394.637 0 3 454957.000 454394.637 0.12% - 13s 0 0 454394.637 0 3 454957.000 454394.637 0.12% - 13s 0 0 454394.637 0 3 454957.000 454394.637 0.12% - 14s 0 0 454394.637 0 3 454957.000 454394.637 0.12% - 14s 0 0 454399.364 0 2 454957.000 454399.364 0.12% - 15s 0 2 454402.253 0 2 454957.000 454402.253 0.12% - 16s H 11 7 454887.00000 454566.373 0.07% 84.8 18s * 12 7 10 454867.00000 454566.373 0.07% 78.5 18s 24 2 cutoff 1 454867.000 454713.000 0.03% 86.3 20s Cutting planes: Implied bound: 104 Flow cover: 1 Explored 33 nodes (23663 simplex iterations) in 21.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.548670000000e+05, best bound 4.548316896552e+05, gap 0.0078%