Gurobi 5.0.1 (linux64) logging started Fri Jan 18 06:08:40 2013 Optimize a model with 1600 rows, 50600 columns and 326550 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.53s Presolved: 1550 rows, 50550 columns, 301500 nonzeros Variable types: 50100 continuous, 450 integer (450 binary) Root relaxation: objective 1.749223e+05, 2323 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 174922.321 0 6 - 174922.321 - - 0s 0 0 174924.067 0 6 - 174924.067 - - 1s 0 0 174924.797 0 6 - 174924.797 - - 1s 0 0 174924.797 0 6 - 174924.797 - - 1s 0 0 174924.797 0 6 - 174924.797 - - 1s 0 0 174924.797 0 6 - 174924.797 - - 1s 0 0 174924.797 0 6 - 174924.797 - - 2s 0 0 174924.797 0 6 - 174924.797 - - 2s 0 0 174924.797 0 6 - 174924.797 - - 2s 0 2 174935.970 0 6 - 174935.970 - - 6s * 105 44 104 176894.91234 174949.288 1.10% 7.5 9s 112 43 175133.057 4 3 176894.912 175095.640 1.02% 8.3 10s H 245 161 176885.88736 175133.057 0.99% 8.8 12s H 272 178 176807.34205 175133.057 0.95% 8.1 12s * 339 33 19 176245.18346 175550.124 0.39% 9.0 13s 385 10 176237.404 17 3 176245.183 176200.052 0.03% 12.5 15s * 393 8 25 176244.25903 176200.052 0.03% 12.3 15s H 412 12 176235.21598 176200.052 0.02% 12.0 15s * 464 2 25 176210.47145 176210.432 0.00% 11.0 15s Cutting planes: Flow cover: 8 Explored 465 nodes (8427 simplex iterations) in 15.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.762104714471e+05, best bound 1.762104318086e+05, gap 0.0000%