Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:44:02 2012 Optimize a model with 207 rows, 148 columns and 663 nonzeros Presolve time: 0.00s Presolved: 207 rows, 148 columns, 663 nonzeros Variable types: 0 continuous, 148 integer (148 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 0.000000e+00, 63 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 45 56.00000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.77284 0 47 39.00000 0.77284 98.0% - 0s H 0 0 34.0000000 0.77284 97.7% - 0s 0 0 0.85174 0 49 34.00000 0.85174 97.5% - 0s 0 0 0.92790 0 50 34.00000 0.92790 97.3% - 0s 0 0 0.96091 0 53 34.00000 0.96091 97.2% - 0s H 0 0 30.0000000 0.96091 96.8% - 0s 0 0 0.99210 0 55 30.00000 0.99210 96.7% - 0s H 0 0 29.0000000 0.99210 96.6% - 0s 0 0 1.00948 0 57 29.00000 1.00948 96.5% - 0s 0 0 1.00948 0 57 29.00000 1.00948 96.5% - 0s H 0 0 25.0000000 1.00948 96.0% - 0s 0 2 1.02143 0 57 25.00000 1.02143 95.9% - 0s * 37 25 11 23.0000000 4.05556 82.4% 24.9 0s * 54 34 12 22.0000000 6.59259 70.0% 23.3 0s * 56 27 11 21.0000000 6.59259 68.6% 22.7 0s Cutting planes: Gomory: 1 Zero half: 1 Mod-K: 6 Explored 386 nodes (6675 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%