Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:20:29 2012 Optimize a model with 243 rows, 186 columns and 791 nonzeros Presolve time: 0.00s Presolved: 243 rows, 186 columns, 791 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 0.000000e+00, 104 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 46.00000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s 0 0 0.56777 0 64 40.00000 0.56777 98.6% - 0s H 0 0 38.0000000 0.56777 98.5% - 0s 0 0 1.00000 0 67 38.00000 1.00000 97.4% - 0s 0 0 1.00000 0 66 38.00000 1.00000 97.4% - 0s H 0 0 36.0000000 1.00000 97.2% - 0s 0 0 1.00000 0 67 36.00000 1.00000 97.2% - 0s 0 0 1.00000 0 65 36.00000 1.00000 97.2% - 0s H 0 0 27.0000000 1.00000 96.3% - 0s H 0 0 26.0000000 1.00000 96.2% - 0s 0 2 1.00000 0 65 26.00000 1.00000 96.2% - 0s H 27 27 25.0000000 3.03524 87.9% 27.1 0s * 28 23 18 24.0000000 3.03524 87.4% 27.2 0s * 58 42 20 23.0000000 3.18737 86.1% 25.1 0s * 82 44 16 21.0000000 6.38014 69.6% 24.6 0s * 128 62 13 20.0000000 9.05455 54.7% 25.8 0s * 181 55 12 19.0000000 9.45283 50.2% 23.3 0s * 276 27 12 18.0000000 14.00000 22.2% 22.1 0s Cutting planes: Gomory: 3 Zero half: 2 Explored 326 nodes (7122 simplex iterations) in 0.25 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%