Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:54:48 2013 Optimize a model with 1900 rows, 101700 columns and 204100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.74s Presolved: 1700 rows, 101400 columns, 202800 nonzeros Variable types: 101000 continuous, 400 integer (400 binary) Root relaxation: objective 7.918217e+05, 7693 iterations, 1.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 791821.709 0 2 - 791821.709 - - 2s H 0 0 856648.37185 791821.709 7.57% - 2s 0 0 791888.424 0 2 856648.372 791888.424 7.56% - 2s 0 0 791948.484 0 2 856648.372 791948.484 7.55% - 3s 0 0 791948.484 0 2 856648.372 791948.484 7.55% - 3s 0 0 791952.789 0 2 856648.372 791952.789 7.55% - 4s 0 0 791961.012 0 2 856648.372 791961.012 7.55% - 4s 0 0 791964.797 0 2 856648.372 791964.797 7.55% - 4s 0 0 791965.942 0 2 856648.372 791965.942 7.55% - 5s 0 0 791967.085 0 2 856648.372 791967.085 7.55% - 5s 0 0 791968.433 0 2 856648.372 791968.433 7.55% - 5s 0 0 791968.965 0 2 856648.372 791968.965 7.55% - 6s 0 0 791969.501 0 2 856648.372 791969.501 7.55% - 6s 0 0 791969.907 0 2 856648.372 791969.907 7.55% - 7s 0 0 791969.907 0 2 856648.372 791969.907 7.55% - 7s 0 2 792019.587 0 2 856648.372 792019.587 7.54% - 8s 7 9 792733.529 6 1 856648.372 792677.894 7.47% 86.3 10s * 17 8 16 793357.35859 792677.894 0.09% 57.3 12s 34 4 792858.535 3 1 793357.359 792858.535 0.06% 87.3 15s * 37 2 6 793200.24980 792940.639 0.03% 86.6 15s Cutting planes: Flow cover: 20 Explored 50 nodes (11980 simplex iterations) in 16.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.932002498024e+05, best bound 7.931605312250e+05, gap 0.0050%