Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:44:32 2013 Optimize a model with 693 rows, 39753 columns and 79443 nonzeros Presolve time: 0.05s Presolved: 693 rows, 39753 columns, 79443 nonzeros Variable types: 39690 continuous, 63 integer (63 binary) Root relaxation: objective 6.718913e+04, 1766 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67189.1288 0 4 - 67189.1288 - - 0s H 0 0 69207.000000 67189.1288 2.92% - 0s 0 0 67366.5250 0 5 69207.0000 67366.5250 2.66% - 0s 0 0 67397.8714 0 4 69207.0000 67397.8714 2.61% - 0s 0 0 67399.6237 0 3 69207.0000 67399.6237 2.61% - 0s H 0 0 68713.000000 67399.6237 1.91% - 0s 0 0 67400.9432 0 4 68713.0000 67400.9432 1.91% - 0s 0 0 67401.1558 0 4 68713.0000 67401.1558 1.91% - 0s 0 0 67401.1558 0 4 68713.0000 67401.1558 1.91% - 0s 0 0 67401.1558 0 4 68713.0000 67401.1558 1.91% - 0s 0 2 67408.2329 0 4 68713.0000 67408.2329 1.90% - 0s H 2 2 68549.416667 67478.6670 1.56% 56.0 1s H 4 3 68523.708333 67525.4474 1.46% 70.2 1s H 7 6 68100.000000 67525.4474 0.84% 50.4 1s H 10 4 67734.000000 67525.4474 0.31% 39.9 1s * 12 3 12 67703.000000 67525.4474 0.26% 34.1 1s Cutting planes: Implied bound: 79 Flow cover: 7 Explored 19 nodes (2984 simplex iterations) in 1.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.770300000000e+04, best bound 6.770300000000e+04, gap 0.0%