Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:23:32 2012 Optimize a model with 239 rows, 190 columns and 785 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 239 rows, 188 columns, 783 nonzeros Variable types: 0 continuous, 188 integer (187 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 0.000000e+00, 98 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 63 51.00000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.37168 0 65 37.00000 0.37168 99.0% - 0s 0 0 0.83740 0 69 37.00000 0.83740 97.7% - 0s 0 0 0.83740 0 70 37.00000 0.83740 97.7% - 0s 0 0 0.83740 0 67 37.00000 0.83740 97.7% - 0s H 0 0 33.0000000 0.83740 97.5% - 0s H 0 0 31.0000000 0.83740 97.3% - 0s 0 2 0.84573 0 67 31.00000 0.84573 97.3% - 0s * 26 23 16 20.0000000 1.37577 93.1% 30.5 0s * 73 41 13 19.0000000 3.77912 80.1% 29.5 0s * 77 40 14 18.0000000 3.77912 79.0% 28.7 0s Cutting planes: Gomory: 4 Mod-K: 2 Explored 1223 nodes (28479 simplex iterations) in 0.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%