Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:52 2012 Optimize a model with 141 rows, 87 columns and 437 nonzeros Presolve time: 0.00s Presolved: 141 rows, 87 columns, 437 nonzeros Variable types: 0 continuous, 87 integer (87 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 26 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 17 36.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.83824 0 19 31.00000 0.83824 97.3% - 0s 0 0 0.83824 0 19 31.00000 0.83824 97.3% - 0s 0 0 0.86655 0 25 31.00000 0.86655 97.2% - 0s 0 0 0.88235 0 19 31.00000 0.88235 97.2% - 0s 0 0 0.88235 0 19 31.00000 0.88235 97.2% - 0s 0 0 0.88235 0 19 31.00000 0.88235 97.2% - 0s 0 2 0.90909 0 19 31.00000 0.90909 97.1% - 0s * 15 13 8 29.0000000 7.78125 73.2% 21.6 0s * 73 22 7 27.0000000 12.00000 55.6% 12.5 0s Cutting planes: Gomory: 1 Mod-K: 6 Explored 219 nodes (2235 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%