Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:28 2013 Optimize a model with 1080 rows, 4840 columns and 11220 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.03s Presolved: 1020 rows, 4800 columns, 10360 nonzeros Variable types: 4420 continuous, 380 integer (380 binary) Root relaxation: objective 4.636776e+04, 863 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 2 - 46367.7551 - - 0s 0 0 46417.2007 0 2 - 46417.2007 - - 0s 0 0 46432.2441 0 2 - 46432.2441 - - 0s 0 0 46447.9495 0 2 - 46447.9495 - - 0s 0 0 46457.3857 0 2 - 46457.3857 - - 0s 0 0 46463.9579 0 2 - 46463.9579 - - 0s 0 0 46464.8334 0 3 - 46464.8334 - - 0s 0 0 46467.7953 0 2 - 46467.7953 - - 0s 0 0 46468.1482 0 2 - 46468.1482 - - 0s 0 0 46469.8257 0 3 - 46469.8257 - - 0s 0 0 46470.9525 0 3 - 46470.9525 - - 0s 0 0 46472.8778 0 3 - 46472.8778 - - 0s 0 0 46476.4618 0 3 - 46476.4618 - - 0s 0 0 46481.6878 0 3 - 46481.6878 - - 0s 0 0 46484.7776 0 4 - 46484.7776 - - 0s 0 0 46485.2018 0 4 - 46485.2018 - - 0s H 0 0 47146.471060 46485.2018 1.40% - 0s 0 2 46489.7001 0 4 47146.4711 46489.7001 1.39% - 0s H 10 10 46653.669952 46545.1907 0.23% 35.8 0s Cutting planes: Flow cover: 21 Explored 30 nodes (1797 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.665366995229e+04, best bound 4.665298242154e+04, gap 0.0015%