Gurobi 5.0.1 (linux64) logging started Fri Jan 18 08:30:05 2013 Optimize a model with 3400 rows, 201300 columns and 1403400 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 2.04s Presolved: 3300 rows, 201200 columns, 1303300 nonzeros Variable types: 200200 continuous, 1000 integer (1000 binary) Root relaxation: objective 8.654105e+05, 8250 iterations, 1.47 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 6 - 865410.545 - - 4s 0 0 865419.191 0 6 - 865419.191 - - 5s 0 0 865421.451 0 9 - 865421.451 - - 6s 0 0 865422.194 0 10 - 865422.194 - - 7s 0 0 865422.689 0 10 - 865422.689 - - 8s 0 0 865423.000 0 10 - 865423.000 - - 8s 0 0 865423.000 0 10 - 865423.000 - - 11s 0 2 865432.379 0 10 - 865432.379 - - 26s 8 10 866690.964 7 3 - 866068.361 - 177 30s 21 23 867847.495 20 3 - 866068.361 - 90.7 35s 39 41 867857.248 38 3 - 866068.361 - 51.2 40s * 48 15 47 867857.39055 866068.361 0.21% 41.9 41s 66 20 866750.641 16 3 867857.391 866088.143 0.20% 47.0 45s H 78 13 866852.53372 866088.143 0.09% 40.6 47s H 105 19 866850.91488 866088.143 0.09% 31.9 50s * 108 19 56 866850.81874 866088.143 0.09% 31.1 50s 127 18 866576.635 3 6 866850.819 866576.635 0.03% 60.4 55s Cutting planes: Flow cover: 8 Explored 142 nodes (17105 simplex iterations) in 56.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668508187359e+05, best bound 8.667706496003e+05, gap 0.0092%