Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:00:25 2013 Optimize a model with 18102 rows, 17682 columns and 70602 nonzeros Presolve removed 746 rows and 0 columns Presolve time: 0.10s Presolved: 17356 rows, 17682 columns, 69110 nonzeros Variable types: 17640 continuous, 42 integer (42 binary) Root relaxation: objective 4.493565e+04, 2833 iterations, 0.22 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44935.6531 0 4 - 44935.6531 - - 0s H 0 0 45133.000000 44935.6531 0.44% - 0s H 0 0 45031.000000 44935.6531 0.21% - 0s 0 0 44941.2824 0 5 45031.0000 44941.2824 0.20% - 0s 0 2 44971.4281 0 5 45031.0000 44971.4281 0.13% - 0s * 6 4 4 45015.000000 44986.0000 0.06% 32.5 0s * 7 2 5 45014.000000 44986.0000 0.06% 33.3 0s H 8 0 44998.533333 44986.0000 0.03% 29.1 0s * 9 1 2 44993.000000 44993.0000 0.0% 33.3 1s Cutting planes: Gomory: 1 Flow cover: 3 Explored 10 nodes (3164 simplex iterations) in 1.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.499300000000e+04, best bound 4.499300000000e+04, gap 0.0%