Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:11:57 2013 Optimize a model with 26571 rows, 26061 columns and 104091 nonzeros Presolve removed 2210 rows and 0 columns Presolve time: 0.16s Presolved: 24361 rows, 26061 columns, 99671 nonzeros Variable types: 26010 continuous, 51 integer (51 binary) Root relaxation: objective 5.742496e+04, 5047 iterations, 0.55 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57424.9565 0 1 - 57424.9565 - - 0s H 0 0 57672.000000 57424.9565 0.43% - 0s H 0 0 57557.000000 57424.9565 0.23% - 0s 0 0 57428.1684 0 3 57557.0000 57428.1684 0.22% - 0s 0 0 57428.9050 0 3 57557.0000 57428.9050 0.22% - 1s 0 0 57428.9222 0 4 57557.0000 57428.9222 0.22% - 1s 0 0 57428.9647 0 3 57557.0000 57428.9647 0.22% - 1s H 0 0 57553.000000 57428.9647 0.22% - 1s 0 0 57428.9647 0 1 57553.0000 57428.9647 0.22% - 2s 0 0 57429.0405 0 3 57553.0000 57429.0405 0.22% - 2s 0 2 57446.4136 0 3 57553.0000 57446.4136 0.19% - 2s Cutting planes: Gomory: 1 Flow cover: 2 Explored 2 nodes (7392 simplex iterations) in 2.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.755300000000e+04, best bound 5.755204761905e+04, gap 0.0017%