Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:20:28 2012 Optimize a model with 227 rows, 178 columns and 743 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 227 rows, 176 columns, 741 nonzeros Variable types: 0 continuous, 176 integer (175 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 114 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 62 43.00000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.53970 0 63 39.00000 0.53970 98.6% - 0s 0 0 1.00000 0 64 39.00000 1.00000 97.4% - 0s H 0 0 31.0000000 1.00000 96.8% - 0s 0 0 1.09983 0 64 31.00000 1.09983 96.5% - 0s H 0 0 30.0000000 1.09983 96.3% - 0s 0 0 1.24510 0 65 30.00000 1.24510 95.8% - 0s H 0 0 29.0000000 1.24510 95.7% - 0s 0 0 1.27353 0 65 29.00000 1.27353 95.6% - 0s 0 0 1.27353 0 65 29.00000 1.27353 95.6% - 0s 0 2 1.28842 0 65 29.00000 1.28842 95.6% - 0s * 26 26 19 21.0000000 3.73738 82.2% 21.5 0s * 46 35 14 20.0000000 3.89271 80.5% 23.0 0s * 49 28 12 19.0000000 3.89271 79.5% 21.6 0s * 238 14 8 18.0000000 14.35185 20.3% 20.4 0s Cutting planes: Gomory: 4 Zero half: 1 Explored 261 nodes (5588 simplex iterations) in 0.24 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%