Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:46:04 2013 Optimize a model with 2310 rows, 441210 columns and 882210 nonzeros Presolve time: 1.41s Presolved: 2310 rows, 441210 columns, 882210 nonzeros Variable types: 441000 continuous, 210 integer (210 binary) Root relaxation: objective 4.798716e+05, 17386 iterations, 2.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 479871.576 0 5 - 479871.576 - - 4s H 0 0 503058.00000 479871.576 4.61% - 5s H 0 0 481471.00000 479871.576 0.33% - 6s 0 0 480275.646 0 4 481471.000 480275.646 0.25% - 7s 0 0 480275.646 0 5 481471.000 480275.646 0.25% - 10s 0 0 480289.017 0 4 481471.000 480289.017 0.25% - 11s 0 0 480339.626 0 5 481471.000 480339.626 0.23% - 12s 0 0 480350.572 0 5 481471.000 480350.572 0.23% - 12s 0 0 480356.499 0 3 481471.000 480356.499 0.23% - 13s 0 0 480369.084 0 3 481471.000 480369.084 0.23% - 13s 0 0 480376.178 0 3 481471.000 480376.178 0.23% - 14s 0 0 480381.917 0 4 481471.000 480381.917 0.23% - 14s 0 0 480382.809 0 4 481471.000 480382.809 0.23% - 15s 0 0 480382.809 0 4 481471.000 480382.809 0.23% - 15s 0 0 480382.989 0 4 481471.000 480382.989 0.23% - 15s 0 0 480383.599 0 3 481471.000 480383.599 0.23% - 16s 0 0 480383.599 0 3 481471.000 480383.599 0.23% - 16s 0 2 480389.493 0 3 481471.000 480389.493 0.22% - 18s 8 7 480548.854 8 2 481471.000 480466.259 0.21% 125 20s H 11 8 480973.00000 480466.259 0.11% 125 21s * 13 7 13 480928.00000 480466.259 0.10% 117 21s Cutting planes: Implied bound: 161 Flow cover: 11 Explored 22 nodes (31805 simplex iterations) in 23.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.809280000000e+05, best bound 4.809280000000e+05, gap 0.0%