Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:51:44 2013 Optimize a model with 57075 rows, 56325 columns and 225075 nonzeros Presolve removed 3785 rows and 0 columns Presolve time: 0.35s Presolved: 53290 rows, 56325 columns, 217505 nonzeros Variable types: 56250 continuous, 75 integer (75 binary) Root relaxation: objective 8.436545e+04, 12110 iterations, 2.29 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 84365.4504 0 5 - 84365.4504 - - 2s H 0 0 89268.000000 84365.4504 5.49% - 2s H 0 0 89198.000000 84365.4504 5.42% - 3s 0 0 84365.6329 0 7 89198.0000 84365.6329 5.42% - 3s H 0 0 89195.000000 84365.6329 5.41% - 3s 0 0 84365.6329 0 7 89195.0000 84365.6329 5.41% - 3s H 0 0 85889.000000 84365.6329 1.77% - 4s 0 2 84389.0325 0 7 85889.0000 84389.0325 1.75% - 5s H 4 4 84821.347687 84467.3509 0.42% 70.8 6s H 16 6 84576.000000 84471.1840 0.12% 55.8 6s H 20 5 84572.000000 84471.1840 0.12% 55.6 7s * 22 5 19 84556.000000 84471.1840 0.10% 51.5 7s * 30 3 6 84505.000000 84484.7182 0.02% 58.0 7s Cutting planes: Gomory: 1 Flow cover: 7 Explored 33 nodes (13899 simplex iterations) in 7.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.450500000000e+04, best bound 8.449761403509e+04, gap 0.0087%