Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:43 2012 Optimize a model with 77 rows, 74 columns and 264 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 77 rows, 72 columns, 262 nonzeros Variable types: 0 continuous, 72 integer (71 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 0.000000e+00, 48 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 30 18.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.40000 0 31 11.00000 0.40000 96.4% - 0s H 0 0 9.0000000 0.40000 95.6% - 0s H 0 0 7.0000000 0.40000 94.3% - 0s 0 0 1.00000 0 33 7.00000 1.00000 85.7% - 0s 0 0 1.00000 0 32 7.00000 1.00000 85.7% - 0s 0 0 1.00000 0 34 7.00000 1.00000 85.7% - 0s 0 0 1.00000 0 30 7.00000 1.00000 85.7% - 0s H 0 0 6.0000000 1.00000 83.3% - 0s H 0 0 5.0000000 1.00000 80.0% - 0s 0 2 1.00000 0 30 5.00000 1.00000 80.0% - 0s * 4 2 2 4.0000000 2.60000 35.0% 28.2 0s Cutting planes: Gomory: 1 Explored 7 nodes (413 simplex iterations) in 0.02 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%