Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:04:42 2012 Optimize a model with 211 rows, 155 columns and 680 nonzeros Presolve time: 0.00s Presolved: 211 rows, 155 columns, 680 nonzeros Variable types: 0 continuous, 155 integer (155 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 0.000000e+00, 82 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 49 33.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 0 0.51109 0 50 32.00000 0.51109 98.4% - 0s H 0 0 29.0000000 0.51109 98.2% - 0s 0 0 1.00000 0 52 29.00000 1.00000 96.6% - 0s H 0 0 27.0000000 1.00000 96.3% - 0s 0 0 1.00000 0 49 27.00000 1.00000 96.3% - 0s 0 2 1.00000 0 49 27.00000 1.00000 96.3% - 0s * 22 20 11 20.0000000 4.08026 79.6% 31.7 0s * 40 20 11 19.0000000 4.78396 74.8% 28.4 0s Cutting planes: Gomory: 3 Explored 284 nodes (7064 simplex iterations) in 0.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%