Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:45:27 2013 Optimize a model with 2200 rows, 400200 columns and 800200 nonzeros Presolve time: 1.08s Presolved: 2200 rows, 400200 columns, 800200 nonzeros Variable types: 400000 continuous, 200 integer (200 binary) Root relaxation: objective 4.211904e+05, 17463 iterations, 2.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 421190.432 0 5 - 421190.432 - - 3s H 0 0 443466.00000 421190.432 5.02% - 4s H 0 0 422567.00000 421190.432 0.33% - 5s 0 0 421599.765 0 6 422567.000 421599.765 0.23% - 6s 0 0 421599.765 0 5 422567.000 421599.765 0.23% - 9s 0 0 421600.296 0 6 422567.000 421600.296 0.23% - 10s 0 0 421675.494 0 5 422567.000 421675.494 0.21% - 10s 0 0 421693.770 0 4 422567.000 421693.770 0.21% - 11s 0 0 421699.608 0 4 422567.000 421699.608 0.21% - 11s 0 0 421699.608 0 4 422567.000 421699.608 0.21% - 11s 0 0 421699.608 0 4 422567.000 421699.608 0.21% - 12s 0 0 421699.608 0 4 422567.000 421699.608 0.21% - 12s 0 2 421705.813 0 4 422567.000 421705.813 0.20% - 14s 3 5 421857.646 3 1 422567.000 421810.995 0.18% 248 15s H 13 9 422553.00000 421810.995 0.18% 126 17s * 16 10 16 422302.00000 421810.995 0.12% 105 17s 22 8 422100.132 2 1 422302.000 421909.872 0.09% 196 20s * 26 7 5 422217.00000 421909.872 0.07% 201 21s Cutting planes: Implied bound: 238 Flow cover: 9 Explored 39 nodes (34242 simplex iterations) in 21.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.222170000000e+05, best bound 4.222017574257e+05, gap 0.0036%