Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:41:16 2012 Optimize a model with 153 rows, 118 columns and 498 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 153 rows, 117 columns, 497 nonzeros Variable types: 0 continuous, 117 integer (116 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 0.000000e+00, 56 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 40 32.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 0 0.47500 0 41 23.00000 0.47500 97.9% - 0s H 0 0 21.0000000 0.47500 97.7% - 0s 0 0 1.00000 0 42 21.00000 1.00000 95.2% - 0s 0 0 1.04062 0 43 21.00000 1.04062 95.0% - 0s 0 0 1.25115 0 45 21.00000 1.25115 94.0% - 0s 0 0 1.27437 0 45 21.00000 1.27437 93.9% - 0s 0 0 1.27478 0 45 21.00000 1.27478 93.9% - 0s 0 0 1.27478 0 45 21.00000 1.27478 93.9% - 0s 0 2 1.27478 0 45 21.00000 1.27478 93.9% - 0s * 19 15 13 16.0000000 3.77651 76.4% 22.3 0s * 42 17 9 15.0000000 3.81416 74.6% 20.9 0s * 54 20 8 14.0000000 5.82666 58.4% 22.6 0s Cutting planes: Gomory: 3 Zero half: 2 Explored 162 nodes (3525 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.400000000000e+01, best bound 1.400000000000e+01, gap 0.0%