Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:43 2012 Optimize a model with 434 rows, 132 columns and 868 nonzeros Presolve removed 105 rows and 5 columns Presolve time: 0.00s Presolved: 329 rows, 127 columns, 715 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.666667e+01, 209 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56.66667 0 113 46.00000 56.66667 23.2% - 0s H 0 0 48.0000000 56.66667 18.1% - 0s 0 0 56.05072 0 126 48.00000 56.05072 16.8% - 0s H 0 0 50.0000000 56.05072 12.1% - 0s 0 0 55.35849 0 121 50.00000 55.35849 10.7% - 0s 0 0 55.00000 0 109 50.00000 55.00000 10.0% - 0s 0 0 54.88312 0 118 50.00000 54.88312 9.77% - 0s 0 0 54.44444 0 121 50.00000 54.44444 8.89% - 0s 0 0 54.26316 0 117 50.00000 54.26316 8.53% - 0s H 0 0 51.0000000 54.26316 6.40% - 0s 0 0 54.22321 0 124 51.00000 54.22321 6.32% - 0s H 0 0 52.0000000 54.22321 4.28% - 0s 0 0 54.08113 0 121 52.00000 54.08113 4.00% - 0s 0 0 53.94090 0 121 52.00000 53.94090 3.73% - 0s 0 0 53.79828 0 124 52.00000 53.79828 3.46% - 0s 0 0 53.77514 0 123 52.00000 53.77514 3.41% - 0s 0 0 53.76080 0 124 52.00000 53.76080 3.39% - 0s 0 0 53.76080 0 124 52.00000 53.76080 3.39% - 0s 0 2 53.76080 0 124 52.00000 53.76080 3.39% - 0s Cutting planes: Gomory: 2 Zero half: 72 Explored 29 nodes (1512 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%