Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:33:25 2013 Optimize a model with 1800 rows, 100700 columns and 201900 nonzeros Presolve removed 300 rows and 200 columns Presolve time: 0.27s Presolved: 1500 rows, 100500 columns, 201100 nonzeros Variable types: 100400 continuous, 100 integer (100 binary) Root relaxation: objective 8.951303e+05, 6866 iterations, 0.45 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 895130.293 0 4 - 895130.293 - - 0s H 0 0 915138.15793 895130.293 2.19% - 1s 0 0 895191.950 0 4 915138.158 895191.950 2.18% - 1s 0 0 895215.672 0 4 915138.158 895215.672 2.18% - 1s 0 0 895237.083 0 4 915138.158 895237.083 2.17% - 1s 0 0 895245.750 0 4 915138.158 895245.750 2.17% - 2s 0 0 895247.486 0 4 915138.158 895247.486 2.17% - 2s 0 0 895248.998 0 4 915138.158 895248.998 2.17% - 2s 0 0 895257.295 0 4 915138.158 895257.295 2.17% - 2s 0 0 895258.829 0 4 915138.158 895258.829 2.17% - 2s 0 0 895259.848 0 4 915138.158 895259.848 2.17% - 3s 0 0 895260.714 0 4 915138.158 895260.714 2.17% - 3s 0 0 895261.443 0 3 915138.158 895261.443 2.17% - 3s 0 0 895261.443 0 3 915138.158 895261.443 2.17% - 4s 0 0 895261.640 0 4 915138.158 895261.640 2.17% - 4s 0 0 895261.764 0 4 915138.158 895261.764 2.17% - 4s 0 0 895261.880 0 3 915138.158 895261.880 2.17% - 5s 0 0 895261.880 0 3 915138.158 895261.880 2.17% - 5s 0 0 895261.880 0 3 915138.158 895261.880 2.17% - 5s 0 0 895261.880 0 3 915138.158 895261.880 2.17% - 6s 0 2 895262.623 0 3 915138.158 895262.623 2.17% - 7s * 11 4 11 895998.28922 895571.661 0.05% 49.4 8s Cutting planes: Flow cover: 20 Explored 14 nodes (8731 simplex iterations) in 8.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.959982892213e+05, best bound 8.959982892213e+05, gap 0.0%