Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:30:57 2013 Optimize a model with 649 rows, 34869 columns and 69679 nonzeros Presolve time: 0.05s Presolved: 649 rows, 34869 columns, 69679 nonzeros Variable types: 34810 continuous, 59 integer (59 binary) Root relaxation: objective 5.556682e+04, 1292 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55566.8161 0 7 - 55566.8161 - - 0s H 0 0 57763.000000 55566.8161 3.80% - 0s H 0 0 56357.000000 55566.8161 1.40% - 0s 0 0 55869.1804 0 4 56357.0000 55869.1804 0.87% - 0s 0 0 55911.1754 0 3 56357.0000 55911.1754 0.79% - 0s 0 0 55916.4436 0 3 56357.0000 55916.4436 0.78% - 0s 0 0 55916.6546 0 4 56357.0000 55916.6546 0.78% - 0s 0 0 55916.7118 0 3 56357.0000 55916.7118 0.78% - 0s 0 0 55916.7118 0 7 56357.0000 55916.7118 0.78% - 0s 0 0 55916.7118 0 4 56357.0000 55916.7118 0.78% - 0s 0 0 55916.7118 0 3 56357.0000 55916.7118 0.78% - 0s 0 0 55916.7118 0 3 56357.0000 55916.7118 0.78% - 0s 0 0 55916.7118 0 3 56357.0000 55916.7118 0.78% - 0s 0 0 55916.7118 0 3 56357.0000 55916.7118 0.78% - 1s 0 0 55916.7118 0 3 56357.0000 55916.7118 0.78% - 1s 0 2 55932.2978 0 3 56357.0000 55932.2978 0.75% - 1s H 6 4 56126.000000 56037.8384 0.16% 45.3 1s * 8 2 7 56124.000000 56037.8384 0.15% 40.9 1s Cutting planes: Implied bound: 74 Flow cover: 8 Explored 13 nodes (3265 simplex iterations) in 1.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.612400000000e+04, best bound 5.612400000000e+04, gap 0.0%