Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:53:22 2012 Optimize a model with 672 rows, 118 columns and 1344 nonzeros Presolve removed 253 rows and 0 columns Presolve time: 0.00s Presolved: 419 rows, 118 columns, 1060 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.098812e+01, 323 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.98812 0 114 30.00000 40.98812 36.6% - 0s 0 0 40.64358 0 113 30.00000 40.64358 35.5% - 0s H 0 0 32.0000000 40.64358 27.0% - 0s 0 0 40.27108 0 114 32.00000 40.27108 25.8% - 0s 0 0 39.99363 0 112 32.00000 39.99363 25.0% - 0s 0 0 39.79000 0 113 32.00000 39.79000 24.3% - 0s 0 0 39.56456 0 115 32.00000 39.56456 23.6% - 0s 0 0 39.53600 0 114 32.00000 39.53600 23.6% - 0s 0 0 39.43982 0 114 32.00000 39.43982 23.2% - 0s 0 0 39.34935 0 115 32.00000 39.34935 23.0% - 0s 0 0 39.30064 0 114 32.00000 39.30064 22.8% - 0s 0 0 39.27597 0 115 32.00000 39.27597 22.7% - 0s 0 0 39.21906 0 112 32.00000 39.21906 22.6% - 0s 0 0 39.18918 0 115 32.00000 39.18918 22.5% - 0s 0 0 39.18576 0 115 32.00000 39.18576 22.5% - 0s 0 0 39.18576 0 115 32.00000 39.18576 22.5% - 0s H 0 0 33.0000000 39.18576 18.7% - 0s 0 2 39.18522 0 115 33.00000 39.18522 18.7% - 0s 629 144 36.25000 19 89 33.00000 36.25000 9.85% 31.4 5s Cutting planes: Gomory: 2 Clique: 1 Zero half: 41 Explored 1829 nodes (48089 simplex iterations) in 6.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%