Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:51 2012 Optimize a model with 470 rows, 134 columns and 940 nonzeros Presolve removed 110 rows and 2 columns Presolve time: 0.00s Presolved: 360 rows, 132 columns, 786 nonzeros Variable types: 0 continuous, 132 integer (132 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.691667e+01, 247 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56.91667 0 108 46.00000 56.91667 23.7% - 0s 0 0 55.82787 0 131 46.00000 55.82787 21.4% - 0s 0 0 55.34091 0 129 46.00000 55.34091 20.3% - 0s H 0 0 47.0000000 55.34091 17.7% - 0s 0 0 54.78285 0 131 47.00000 54.78285 16.6% - 0s 0 0 54.71429 0 129 47.00000 54.71429 16.4% - 0s 0 0 54.61445 0 132 47.00000 54.61445 16.2% - 0s 0 0 54.50412 0 132 47.00000 54.50412 16.0% - 0s H 0 0 48.0000000 54.50412 13.6% - 0s 0 0 54.30435 0 130 48.00000 54.30435 13.1% - 0s 0 0 54.21597 0 131 48.00000 54.21597 12.9% - 0s 0 0 54.15457 0 132 48.00000 54.15457 12.8% - 0s 0 0 54.13077 0 131 48.00000 54.13077 12.8% - 0s 0 0 54.11997 0 130 48.00000 54.11997 12.7% - 0s 0 0 54.10661 0 132 48.00000 54.10661 12.7% - 0s 0 0 54.10661 0 131 48.00000 54.10661 12.7% - 0s H 0 0 49.0000000 54.10661 10.4% - 0s 0 2 54.10277 0 131 49.00000 54.10277 10.4% - 0s * 8 8 5 51.0000000 54.10277 6.08% 45.5 0s Cutting planes: Gomory: 2 Clique: 1 Zero half: 74 Explored 72 nodes (3003 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%