Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:36 2013 Optimize a model with 25550 rows, 25050 columns and 100050 nonzeros Presolve removed 658 rows and 0 columns Presolve time: 0.14s Presolved: 24892 rows, 25050 columns, 98734 nonzeros Variable types: 25000 continuous, 50 integer (50 binary) Root relaxation: objective 5.231481e+04, 4581 iterations, 0.55 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52314.8063 0 5 - 52314.8063 - - 0s H 0 0 53344.000000 52314.8063 1.93% - 0s H 0 0 52991.000000 52314.8063 1.28% - 0s 0 0 52317.5446 0 6 52991.0000 52317.5446 1.27% - 1s H 0 0 52839.000000 52317.5446 0.99% - 1s 0 0 52317.6430 0 6 52839.0000 52317.6430 0.99% - 1s 0 0 52317.6430 0 6 52839.0000 52317.6430 0.99% - 1s 0 2 52318.2464 0 6 52839.0000 52318.2464 0.99% - 2s H 12 10 52619.250000 52401.0516 0.41% 38.2 2s * 16 7 13 52530.000000 52401.0516 0.25% 41.9 2s Cutting planes: Gomory: 1 Flow cover: 4 Explored 28 nodes (5863 simplex iterations) in 2.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.253000000000e+04, best bound 5.253000000000e+04, gap 0.0%