Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:24:50 2012 Optimize a model with 481 rows, 456 columns and 1656 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 481 rows, 438 columns, 1638 nonzeros Variable types: 0 continuous, 438 integer (437 binary) Found heuristic solution: objective 87.0000000 Root relaxation: objective 0.000000e+00, 235 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 0 170 87.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s 0 0 0.47319 0 171 59.00000 0.47319 99.2% - 0s H 0 0 53.0000000 0.47319 99.1% - 0s H 0 0 35.0000000 0.47319 98.6% - 0s 0 0 1.00000 0 174 35.00000 1.00000 97.1% - 0s H 0 0 31.0000000 1.00000 96.8% - 0s 0 0 1.00000 0 173 31.00000 1.00000 96.8% - 0s 0 0 1.00000 0 180 31.00000 1.00000 96.8% - 0s 0 0 1.00000 0 170 31.00000 1.00000 96.8% - 0s 0 2 1.00000 0 170 31.00000 1.00000 96.8% - 0s * 45 41 25 14.0000000 1.60345 88.5% 36.5 0s * 74 51 17 13.0000000 1.62222 87.5% 29.4 0s * 133 43 10 12.0000000 7.00000 41.7% 30.5 0s Cutting planes: Gomory: 2 Explored 238 nodes (8777 simplex iterations) in 0.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%