Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:33 2013 Optimize a model with 25550 rows, 25050 columns and 100050 nonzeros Presolve removed 2234 rows and 0 columns Presolve time: 0.14s Presolved: 23316 rows, 25050 columns, 95582 nonzeros Variable types: 25000 continuous, 50 integer (50 binary) Root relaxation: objective 4.637472e+04, 2867 iterations, 0.26 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46374.7237 0 3 - 46374.7237 - - 0s H 0 0 46856.000000 46374.7237 1.03% - 0s 0 0 46374.9667 0 5 46856.0000 46374.9667 1.03% - 0s 0 0 46374.9667 0 3 46856.0000 46374.9667 1.03% - 1s 0 0 46375.3393 0 5 46856.0000 46375.3393 1.03% - 1s 0 0 46375.9329 0 5 46856.0000 46375.9329 1.02% - 1s H 0 0 46516.000000 46375.9329 0.30% - 1s 0 2 46376.8691 0 4 46516.0000 46376.8691 0.30% - 1s H 4 3 46477.684211 46465.2491 0.03% 51.2 2s * 5 1 4 46471.000000 46471.0000 0.0% 50.0 2s Cutting planes: Gomory: 2 Flow cover: 8 Explored 6 nodes (5121 simplex iterations) in 2.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.647100000000e+04, best bound 4.647100000000e+04, gap 0.0%