Gurobi 5.0.1 (linux64) logging started Wed Apr 24 11:34:54 2013 Optimize a model with 197540 rows, 196140 columns and 784140 nonzeros Presolve removed 4411 rows and 0 columns Presolve time: 1.94s Presolved: 193129 rows, 196140 columns, 775318 nonzeros Variable types: 196000 continuous, 140 integer (140 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 20243 1.4258157e+05 4.110156e+04 0.000000e+00 5s 30563 2.2351345e+05 2.901215e+04 0.000000e+00 10s 41843 2.6726593e+05 2.564294e+03 0.000000e+00 15s 45310 2.6894740e+05 0.000000e+00 0.000000e+00 19s Root relaxation: objective 2.689474e+05, 45310 iterations, 18.88 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 268947.403 0 2 - 268947.403 - - 21s H 0 0 272400.00000 268947.403 1.27% - 22s 0 0 268950.343 0 3 272400.000 268950.343 1.27% - 23s H 0 0 270011.00000 268950.343 0.39% - 24s 0 0 268950.343 0 3 270011.000 268950.343 0.39% - 25s 0 0 268950.343 0 2 270011.000 268950.343 0.39% - 43s 0 0 268950.343 0 3 270011.000 268950.343 0.39% - 45s 0 0 268950.343 0 3 270011.000 268950.343 0.39% - 46s 0 2 268955.439 0 3 270011.000 268955.439 0.39% - 51s H 7 7 269713.44515 269038.844 0.25% 211 54s 7 9 269128.351 7 2 269713.445 269038.844 0.25% 242 55s H 8 8 269655.83784 269038.844 0.23% 212 55s * 12 7 11 269271.00000 269038.844 0.09% 207 56s 29 8 269131.522 3 1 269271.000 269112.704 0.06% 168 60s Cutting planes: Gomory: 1 Flow cover: 1 Explored 60 nodes (78234 simplex iterations) in 64.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.692710000000e+05, best bound 2.692607236842e+05, gap 0.0038%