Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:27 2013 Optimize a model with 320 rows, 4140 columns and 8380 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.01s Presolved: 300 rows, 4120 columns, 8300 nonzeros Variable types: 4100 continuous, 20 integer (20 binary) Root relaxation: objective 3.860476e+04, 451 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38604.7615 0 3 - 38604.7615 - - 0s 0 0 38707.2876 0 3 - 38707.2876 - - 0s 0 0 38728.6165 0 3 - 38728.6165 - - 0s 0 0 38747.1136 0 3 - 38747.1136 - - 0s 0 0 38751.0953 0 3 - 38751.0953 - - 0s 0 0 38752.3996 0 3 - 38752.3996 - - 0s 0 0 38759.0610 0 3 - 38759.0610 - - 0s 0 0 38764.4806 0 3 - 38764.4806 - - 0s 0 0 38765.6109 0 3 - 38765.6109 - - 0s 0 0 38768.2167 0 3 - 38768.2167 - - 0s 0 0 38769.3065 0 3 - 38769.3065 - - 0s 0 0 38769.3065 0 3 - 38769.3065 - - 0s H 0 0 39452.594278 38769.3065 1.73% - 0s 0 2 38774.1917 0 3 39452.5943 38774.1917 1.72% - 0s * 5 4 5 38852.147852 38818.3181 0.09% 25.8 0s Cutting planes: Flow cover: 17 Explored 8 nodes (897 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.885214785166e+04, best bound 3.885119918711e+04, gap 0.0024%