Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:53:57 2013 Optimize a model with 825 rows, 56325 columns and 112575 nonzeros Presolve time: 0.08s Presolved: 825 rows, 56325 columns, 112575 nonzeros Variable types: 56250 continuous, 75 integer (75 binary) Root relaxation: objective 7.430931e+04, 1982 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 74309.3119 0 5 - 74309.3119 - - 0s H 0 0 76257.000000 74309.3119 2.55% - 0s 0 0 74595.0520 0 4 76257.0000 74595.0520 2.18% - 0s 0 0 74608.7051 0 2 76257.0000 74608.7051 2.16% - 0s H 0 0 75109.361616 74608.7051 0.67% - 0s H 0 0 74857.000000 74608.7051 0.33% - 0s 0 0 74612.7437 0 2 74857.0000 74612.7437 0.33% - 0s 0 0 74612.7437 0 5 74857.0000 74612.7437 0.33% - 0s H 0 0 74764.000000 74612.7437 0.20% - 0s 0 0 74612.7437 0 3 74764.0000 74612.7437 0.20% - 0s 0 0 74612.7437 0 4 74764.0000 74612.7437 0.20% - 0s 0 0 74612.7437 0 2 74764.0000 74612.7437 0.20% - 0s 0 0 74612.7437 0 2 74764.0000 74612.7437 0.20% - 1s 0 0 74612.7437 0 2 74764.0000 74612.7437 0.20% - 1s 0 0 74612.7437 0 2 74764.0000 74612.7437 0.20% - 1s 0 0 74612.7437 0 2 74764.0000 74612.7437 0.20% - 1s 0 0 74613.6883 0 1 74764.0000 74613.6883 0.20% - 1s H 0 0 74685.000000 74613.6883 0.10% - 1s 0 2 74618.1290 0 1 74685.0000 74618.1290 0.09% - 1s Cutting planes: Implied bound: 40 Flow cover: 1 Explored 4 nodes (4110 simplex iterations) in 1.47 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.468500000000e+04, best bound 7.468500000000e+04, gap 0.0%