Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:35 2012 Optimize a model with 117 rows, 73 columns and 363 nonzeros Presolve time: 0.00s Presolved: 117 rows, 73 columns, 363 nonzeros Variable types: 0 continuous, 73 integer (73 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 0.000000e+00, 22 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 15 28.00000 0.00000 100% - 0s 0 0 0.96000 0 17 28.00000 0.96000 96.6% - 0s 0 0 0.99021 0 25 28.00000 0.99021 96.5% - 0s 0 0 1.13778 0 21 28.00000 1.13778 95.9% - 0s H 0 0 27.0000000 1.13778 95.8% - 0s 0 0 1.17333 0 18 27.00000 1.17333 95.7% - 0s 0 0 1.22667 0 18 27.00000 1.22667 95.5% - 0s 0 0 1.26061 0 28 27.00000 1.26061 95.3% - 0s 0 0 1.34667 0 25 27.00000 1.34667 95.0% - 0s 0 0 1.39373 0 37 27.00000 1.39373 94.8% - 0s 0 0 1.47929 0 35 27.00000 1.47929 94.5% - 0s 0 0 1.54667 0 22 27.00000 1.54667 94.3% - 0s 0 0 1.55780 0 38 27.00000 1.55780 94.2% - 0s 0 0 1.55780 0 37 27.00000 1.55780 94.2% - 0s H 0 0 24.0000000 1.55780 93.5% - 0s 0 2 1.64043 0 36 24.00000 1.64043 93.2% - 0s * 13 13 9 23.0000000 5.95556 74.1% 18.2 0s * 14 11 8 21.0000000 5.95556 71.6% 17.0 0s Cutting planes: Gomory: 1 Zero half: 17 Explored 78 nodes (1117 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%