Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:18:06 2013 Optimize a model with 29754 rows, 29214 columns and 116694 nonzeros Presolve removed 2386 rows and 0 columns Presolve time: 0.17s Presolved: 27368 rows, 29214 columns, 111922 nonzeros Variable types: 29160 continuous, 54 integer (54 binary) Root relaxation: objective 5.401906e+04, 4741 iterations, 0.60 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54019.0583 0 3 - 54019.0583 - - 0s H 0 0 55072.000000 54019.0583 1.91% - 0s 0 0 54021.7707 0 4 55072.0000 54021.7707 1.91% - 1s 0 0 54021.7864 0 5 55072.0000 54021.7864 1.91% - 1s 0 0 54021.7864 0 5 55072.0000 54021.7864 1.91% - 1s 0 2 54027.9376 0 5 55072.0000 54027.9376 1.90% - 2s H 2 2 54591.833333 54236.0952 0.65% 168 2s H 4 4 54351.333333 54236.3333 0.21% 123 2s H 11 2 54268.478261 54236.3333 0.06% 81.5 3s * 14 4 6 54261.000000 54251.3438 0.02% 70.8 3s Cutting planes: Gomory: 1 Flow cover: 4 Explored 19 nodes (5928 simplex iterations) in 3.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.426100000000e+04, best bound 5.426100000000e+04, gap 0.0%