Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:53:21 2013 Optimize a model with 640 rows, 14240 columns and 118620 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.22s Presolved: 620 rows, 14220 columns, 108600 nonzeros Variable types: 14040 continuous, 180 integer (180 binary) Root relaxation: objective 4.636776e+04, 559 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46367.7551 0 6 - 46367.7551 - - 0s 0 0 46368.2972 0 6 - 46368.2972 - - 0s 0 0 46368.2972 0 6 - 46368.2972 - - 0s 0 2 46370.7427 0 6 - 46370.7427 - - 2s * 32 19 30 46694.852078 46385.7229 0.66% 8.8 2s * 60 26 25 46680.342376 46390.1367 0.62% 7.5 2s * 93 21 14 46656.038929 46627.5092 0.06% 7.4 2s * 123 18 10 46654.472259 46648.0251 0.01% 6.3 2s Cutting planes: Flow cover: 3 Explored 140 nodes (1586 simplex iterations) in 2.94 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.665447225889e+04, best bound 4.665055630133e+04, gap 0.0084%