Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:45 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 4.505642e+04, 768 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 45056.4222 0 13 - 45056.4222 - - 0s H 0 0 48095.000000 45056.4222 6.32% - 0s H 0 0 45774.000000 45056.4222 1.57% - 0s 0 0 45536.4231 0 6 45774.0000 45536.4231 0.52% - 0s 0 0 45577.5448 0 6 45774.0000 45577.5448 0.43% - 0s 0 0 45585.9007 0 6 45774.0000 45585.9007 0.41% - 0s 0 0 45587.8697 0 6 45774.0000 45587.8697 0.41% - 0s 0 0 45588.2542 0 4 45774.0000 45588.2542 0.41% - 0s 0 0 45590.2969 0 6 45774.0000 45590.2969 0.40% - 0s 0 0 45622.8807 0 6 45774.0000 45622.8807 0.33% - 0s 0 0 45627.4775 0 5 45774.0000 45627.4775 0.32% - 0s H 0 0 45710.000000 45627.4775 0.18% - 0s 0 0 45627.4775 0 10 45710.0000 45627.4775 0.18% - 0s 0 0 45627.4775 0 5 45710.0000 45627.4775 0.18% - 0s 0 0 45627.4775 0 5 45710.0000 45627.4775 0.18% - 0s 0 0 45634.5602 0 3 45710.0000 45634.5602 0.17% - 0s 0 0 45634.7762 0 4 45710.0000 45634.7762 0.16% - 0s 0 0 45634.9184 0 3 45710.0000 45634.9184 0.16% - 0s 0 0 45634.9184 0 3 45710.0000 45634.9184 0.16% - 0s 0 2 45638.9819 0 3 45710.0000 45638.9819 0.16% - 0s H 4 3 45700.857143 45675.9524 0.05% 13.0 0s H 5 3 45685.840336 45676.3445 0.02% 10.6 0s * 6 1 5 45677.000000 45677.0000 0.0% 10.0 0s Cutting planes: Implied bound: 88 Flow cover: 5 Explored 7 nodes (1978 simplex iterations) in 0.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.567700000000e+04, best bound 4.567700000000e+04, gap 0.0%