Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:33 2013 Optimize a model with 280 rows, 4100 columns and 8200 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.00s Presolved: 320 rows, 4120 columns, 8260 nonzeros Variable types: 4080 continuous, 40 integer (40 binary) Root relaxation: objective 4.636776e+04, 458 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46367.7551 0 4 - 46367.7551 - - 0s H 0 0 46625.049630 46367.7551 0.55% - 0s 0 0 46415.1176 0 4 46625.0496 46415.1176 0.45% - 0s 0 0 46438.3719 0 4 46625.0496 46438.3719 0.40% - 0s 0 0 46447.6512 0 4 46625.0496 46447.6512 0.38% - 0s 0 0 46447.8881 0 4 46625.0496 46447.8881 0.38% - 0s 0 0 46448.8932 0 4 46625.0496 46448.8932 0.38% - 0s 0 0 46449.0156 0 4 46625.0496 46449.0156 0.38% - 0s 0 0 46449.3074 0 4 46625.0496 46449.3074 0.38% - 0s 0 0 46455.0296 0 4 46625.0496 46455.0296 0.36% - 0s 0 0 46455.1374 0 4 46625.0496 46455.1374 0.36% - 0s 0 0 46455.1610 0 4 46625.0496 46455.1610 0.36% - 0s 0 0 46455.1683 0 4 46625.0496 46455.1683 0.36% - 0s 0 0 46624.6369 0 2 46625.0496 46624.6369 0.00% - 0s Cutting planes: Flow cover: 12 Explored 0 nodes (711 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.662504962981e+04, best bound 4.662463686391e+04, gap 0.0009%