Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:20:25 2013 Optimize a model with 605 rows, 30305 columns and 60555 nonzeros Presolve time: 0.04s Presolved: 605 rows, 30305 columns, 60555 nonzeros Variable types: 30250 continuous, 55 integer (55 binary) Root relaxation: objective 5.373167e+04, 1094 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53731.6743 0 9 - 53731.6743 - - 0s H 0 0 57197.000000 53731.6743 6.06% - 0s H 0 0 54465.000000 53731.6743 1.35% - 0s 0 0 54196.0669 0 8 54465.0000 54196.0669 0.49% - 0s 0 0 54255.1075 0 9 54465.0000 54255.1075 0.39% - 0s 0 0 54267.1141 0 6 54465.0000 54267.1141 0.36% - 0s 0 0 54276.7533 0 5 54465.0000 54276.7533 0.35% - 0s 0 0 54281.9618 0 4 54465.0000 54281.9618 0.34% - 0s 0 0 54283.6845 0 4 54465.0000 54283.6845 0.33% - 0s 0 0 54283.7420 0 5 54465.0000 54283.7420 0.33% - 0s H 0 0 54456.000000 54283.7420 0.32% - 0s 0 0 54283.7420 0 9 54456.0000 54283.7420 0.32% - 0s 0 0 54283.7420 0 8 54456.0000 54283.7420 0.32% - 0s 0 0 54283.7420 0 9 54456.0000 54283.7420 0.32% - 0s 0 0 54283.7420 0 6 54456.0000 54283.7420 0.32% - 0s 0 0 54283.7420 0 6 54456.0000 54283.7420 0.32% - 0s 0 0 54283.7420 0 4 54456.0000 54283.7420 0.32% - 1s 0 0 54283.7420 0 4 54456.0000 54283.7420 0.32% - 1s 0 0 54283.7420 0 5 54456.0000 54283.7420 0.32% - 1s 0 2 54284.6903 0 5 54456.0000 54284.6903 0.31% - 1s Cutting planes: Implied bound: 135 Flow cover: 20 Explored 20 nodes (3492 simplex iterations) in 1.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.445600000000e+04, best bound 5.445600000000e+04, gap 0.0%