Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:44 2013 Optimize a model with 506 rows, 21206 columns and 42366 nonzeros Presolve time: 0.03s Presolved: 506 rows, 21206 columns, 42366 nonzeros Variable types: 21160 continuous, 46 integer (46 binary) Root relaxation: objective 5.690049e+04, 1268 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56900.4941 0 6 - 56900.4941 - - 0s H 0 0 57902.000000 56900.4941 1.73% - 0s 0 0 57255.3339 0 3 57902.0000 57255.3339 1.12% - 0s H 0 0 57331.000000 57255.3339 0.13% - 0s 0 0 57255.3339 0 3 57331.0000 57255.3339 0.13% - 0s 0 0 57255.3339 0 3 57331.0000 57255.3339 0.13% - 0s 0 0 57255.3339 0 3 57331.0000 57255.3339 0.13% - 0s 0 0 57329.5000 0 1 57331.0000 57329.5000 0.00% - 0s Cutting planes: Implied bound: 58 Flow cover: 7 Explored 0 nodes (1547 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.733100000000e+04, best bound 5.732950000000e+04, gap 0.0026%