Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:24:18 2012 Optimize a model with 241 rows, 192 columns and 792 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 241 rows, 191 columns, 791 nonzeros Variable types: 0 continuous, 191 integer (190 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 0.000000e+00, 117 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 70 55.00000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s H 0 0 45.0000000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.48571 0 71 39.00000 0.48571 98.8% - 0s H 0 0 37.0000000 0.48571 98.7% - 0s 0 0 1.00000 0 73 37.00000 1.00000 97.3% - 0s H 0 0 35.0000000 1.00000 97.1% - 0s 0 0 1.00000 0 75 35.00000 1.00000 97.1% - 0s 0 0 1.00000 0 70 35.00000 1.00000 97.1% - 0s H 0 0 32.0000000 1.00000 96.9% - 0s 0 2 1.00000 0 70 32.00000 1.00000 96.9% - 0s * 30 28 16 22.0000000 2.78343 87.3% 26.9 0s * 56 40 13 21.0000000 2.78871 86.7% 23.2 0s * 143 90 23 20.0000000 3.77965 81.1% 22.5 0s * 515 191 12 19.0000000 9.50000 50.0% 21.9 0s * 692 167 14 18.0000000 10.43243 42.0% 22.1 0s Cutting planes: Gomory: 3 Explored 1278 nodes (26751 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%