Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:40:29 2012 Optimize a model with 305 rows, 324 columns and 1084 nonzeros Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 305 rows, 300 columns, 1060 nonzeros Variable types: 0 continuous, 300 integer (299 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 0.000000e+00, 195 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 0 125 55.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.20497 0 127 30.00000 0.20497 99.3% - 0s H 0 0 16.0000000 0.20497 98.7% - 0s 0 0 0.79396 0 129 16.00000 0.79396 95.0% - 0s H 0 0 10.0000000 0.79396 92.1% - 0s 0 0 0.79396 0 129 10.00000 0.79396 92.1% - 0s H 0 0 8.0000000 0.79396 90.1% - 0s 0 2 0.79542 0 129 8.00000 0.79542 90.1% - 0s H 54 14 5.0000000 1.00000 80.0% 14.9 0s * 89 15 12 4.0000000 1.00000 75.0% 20.0 0s Cutting planes: Gomory: 4 Zero half: 5 Explored 158 nodes (5763 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%