Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:53:07 2013 Optimize a model with 2800 rows, 111000 columns and 292500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.56s Presolved: 2700 rows, 110900 columns, 282400 nonzeros Variable types: 110200 continuous, 700 integer (700 binary) Root relaxation: objective 7.672886e+05, 6293 iterations, 0.56 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 767288.564 0 9 - 767288.564 - - 1s 0 0 767327.060 0 6 - 767327.060 - - 1s 0 0 767327.060 0 6 - 767327.060 - - 2s 0 0 767327.060 0 6 - 767327.060 - - 2s 0 0 767327.060 0 6 - 767327.060 - - 3s 0 0 767327.060 0 6 - 767327.060 - - 3s 0 0 767327.060 0 6 - 767327.060 - - 4s H 0 0 781346.42761 767327.060 1.79% - 5s 0 2 767335.265 0 6 781346.428 767335.265 1.79% - 5s 24 26 768329.661 23 3 781346.428 767589.151 1.76% 59.5 10s H 27 7 768355.32084 767589.151 0.10% 54.1 10s H 54 5 768348.85148 767851.038 0.06% 70.1 13s Cutting planes: Flow cover: 8 Explored 107 nodes (12446 simplex iterations) in 14.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.683488514786e+05, best bound 7.682886474121e+05, gap 0.0078%