Gurobi 5.0.1 (linux64) logging started Wed Apr 24 11:08:13 2013 Optimize a model with 145320 rows, 144120 columns and 576120 nonzeros Presolve removed 6557 rows and 0 columns Presolve time: 1.22s Presolved: 138763 rows, 144120 columns, 563006 nonzeros Variable types: 144000 continuous, 120 integer (120 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 19877 1.3498052e+05 2.716542e+04 0.000000e+00 5s 32890 1.9788168e+05 1.107136e+04 0.000000e+00 10s 37273 2.0287992e+05 0.000000e+00 0.000000e+00 13s Root relaxation: objective 2.028799e+05, 37273 iterations, 12.99 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 202879.923 0 3 - 202879.923 - - 14s H 0 0 207494.00000 202879.923 2.22% - 15s 0 0 202879.923 0 3 207494.000 202879.923 2.22% - 16s H 0 0 207314.64060 202879.923 2.14% - 19s H 0 0 207055.77612 202879.923 2.02% - 19s 0 2 202880.268 0 3 207055.776 202880.268 2.02% - 22s H 3 3 206258.56667 202894.989 1.63% 53.0 23s 8 10 202930.176 8 1 206258.567 202930.176 1.61% 116 25s H 9 9 204320.00000 202930.176 0.68% 103 25s H 16 16 204231.41176 202939.973 0.63% 104 28s 20 22 202979.125 20 1 204231.412 202939.973 0.63% 119 30s H 22 16 203743.40000 202939.973 0.39% 115 31s H 30 12 203147.00000 202939.973 0.10% 109 33s * 35 8 34 203104.00000 202939.973 0.08% 108 34s 37 6 202978.326 3 2 203104.000 202978.326 0.06% 115 35s * 43 0 31 203064.00000 203064.000 0.0% 119 36s Cutting planes: Flow cover: 5 Explored 44 nodes (42385 simplex iterations) in 36.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.030640000000e+05, best bound 2.030640000000e+05, gap 0.0%