Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:20:05 2012 Optimize a model with 229 rows, 178 columns and 748 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 229 rows, 176 columns, 746 nonzeros Variable types: 0 continuous, 176 integer (175 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 0.000000e+00, 95 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 61 41.00000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s 0 0 0.59393 0 63 40.00000 0.59393 98.5% - 0s H 0 0 38.0000000 0.59393 98.4% - 0s 0 0 1.13552 0 67 38.00000 1.13552 97.0% - 0s H 0 0 33.0000000 1.13552 96.6% - 0s 0 0 1.13552 0 67 33.00000 1.13552 96.6% - 0s H 0 0 32.0000000 1.13552 96.5% - 0s 0 2 1.16324 0 67 32.00000 1.16324 96.4% - 0s * 25 23 15 20.0000000 2.10249 89.5% 31.8 0s H 56 31 19.0000000 4.49265 76.4% 28.3 0s * 68 38 12 17.0000000 4.49265 73.6% 28.2 0s Cutting planes: Gomory: 4 Mod-K: 1 Explored 417 nodes (11635 simplex iterations) in 0.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%