Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:24:14 2012 Optimize a model with 249 rows, 196 columns and 816 nonzeros Presolve time: 0.00s Presolved: 249 rows, 196 columns, 816 nonzeros Variable types: 0 continuous, 196 integer (196 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 0.000000e+00, 106 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 71 57.00000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s 0 0 0.40356 0 73 41.00000 0.40356 99.0% - 0s H 0 0 35.0000000 0.40356 98.8% - 0s 0 0 0.94439 0 75 35.00000 0.94439 97.3% - 0s 0 0 0.94470 0 76 35.00000 0.94470 97.3% - 0s 0 0 0.94470 0 76 35.00000 0.94470 97.3% - 0s H 0 0 32.0000000 0.94470 97.0% - 0s 0 2 0.96434 0 76 32.00000 0.96434 97.0% - 0s * 30 26 17 20.0000000 2.91043 85.4% 28.1 0s * 76 47 15 19.0000000 5.36795 71.7% 29.9 0s * 222 79 17 18.0000000 6.36381 64.6% 25.7 0s Cutting planes: Gomory: 3 Mod-K: 1 Explored 983 nodes (20707 simplex iterations) in 0.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%