Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:14:40 2013 Optimize a model with 2530 rows, 529230 columns and 1058230 nonzeros Presolve time: 4.29s Presolved: 2530 rows, 529230 columns, 1058230 nonzeros Variable types: 529000 continuous, 230 integer (230 binary) Root relaxation: objective 4.787660e+05, 16575 iterations, 3.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 478765.987 0 6 - 478765.987 - - 8s H 0 0 495175.00000 478765.987 3.31% - 9s H 0 0 483283.00000 478765.987 0.93% - 10s 0 0 479194.866 0 5 483283.000 479194.866 0.85% - 11s 0 0 479194.866 0 6 483283.000 479194.866 0.85% - 16s 0 0 479194.866 0 6 483283.000 479194.866 0.85% - 17s 0 0 479271.425 0 7 483283.000 479271.425 0.83% - 18s 0 0 479280.673 0 6 483283.000 479280.673 0.83% - 19s 0 0 479280.688 0 6 483283.000 479280.688 0.83% - 19s 0 0 479282.146 0 6 483283.000 479282.146 0.83% - 20s 0 0 479282.148 0 6 483283.000 479282.148 0.83% - 21s 0 2 479299.627 0 6 483283.000 479299.627 0.82% - 24s 2 5 479418.209 2 3 483283.000 479418.209 0.80% 202 25s H 5 5 479913.89474 479419.058 0.10% 172 26s H 11 7 479653.00000 479419.058 0.05% 101 27s * 16 7 15 479609.00000 479419.058 0.04% 72.6 28s 27 6 cutoff 3 479609.000 479423.948 0.04% 110 30s * 38 5 10 479564.00000 479520.787 0.01% 105 31s Cutting planes: Implied bound: 176 Flow cover: 8 Explored 39 nodes (34296 simplex iterations) in 31.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.795640000000e+05, best bound 4.795207872340e+05, gap 0.0090%