Gurobi 5.0.1 (linux64) logging started Wed Nov 28 03:51:40 2012 Optimize a model with 1057 rows, 1984 columns and 5859 nonzeros Presolve removed 31 rows and 31 columns Presolve time: 0.04s Presolved: 1026 rows, 1953 columns, 5797 nonzeros Variable types: 961 continuous, 992 integer (992 binary) Found heuristic solution: objective 11462.000000 Found heuristic solution: objective 6596.0000000 Root relaxation: objective 7.086452e+02, 1637 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 708.64516 0 46 6596.00000 708.64516 89.3% - 0s 0 0 1060.07992 0 57 6596.00000 1060.07992 83.9% - 0s 0 0 2077.74194 0 70 6596.00000 2077.74194 68.5% - 0s 0 0 2077.74194 0 68 6596.00000 2077.74194 68.5% - 0s H 0 0 4058.0000000 2077.74194 48.8% - 0s 0 0 2369.67742 0 71 4058.00000 2369.67742 41.6% - 0s 0 0 2660.83871 0 84 4058.00000 2660.83871 34.4% - 0s 0 0 2952.00000 0 73 4058.00000 2952.00000 27.3% - 0s 0 0 2952.00000 0 66 4058.00000 2952.00000 27.3% - 0s H 0 0 4054.0000000 2952.00000 27.2% - 0s 0 0 2952.00000 0 73 4054.00000 2952.00000 27.2% - 0s 0 0 2952.00000 0 18 4054.00000 2952.00000 27.2% - 0s H 0 0 3684.0000000 2952.00000 19.9% - 0s H 0 0 3318.0000000 2952.00000 11.0% - 0s 0 2 2952.00000 0 14 3318.00000 2952.00000 11.0% - 0s * 15 4 11 2952.0000000 2952.00000 0.0% 183 0s Cutting planes: Flow cover: 14 Explored 16 nodes (11414 simplex iterations) in 0.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.952000000000e+03, best bound 2.952000000000e+03, gap 0.0%