Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:30:09 2012 Optimize a model with 275 rows, 213 columns and 898 nonzeros Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 275 rows, 210 columns, 895 nonzeros Variable types: 0 continuous, 210 integer (209 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 0.000000e+00, 115 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 72 57.00000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.59465 0 73 37.00000 0.59465 98.4% - 0s H 0 0 34.0000000 0.59465 98.3% - 0s 0 0 1.00000 0 74 34.00000 1.00000 97.1% - 0s H 0 0 33.0000000 1.00000 97.0% - 0s 0 0 1.00000 0 75 33.00000 1.00000 97.0% - 0s 0 0 1.00000 0 72 33.00000 1.00000 97.0% - 0s 0 0 1.00000 0 72 33.00000 1.00000 97.0% - 0s 0 2 1.00000 0 72 33.00000 1.00000 97.0% - 0s H 27 27 29.0000000 3.34339 88.5% 32.7 0s * 33 30 21 25.0000000 3.34339 86.6% 28.0 0s * 58 45 14 24.0000000 4.45905 81.4% 28.5 0s * 170 107 20 23.0000000 7.66667 66.7% 25.4 0s * 206 98 13 21.0000000 7.72727 63.2% 26.0 0s H 305 86 20.0000000 11.02439 44.9% 23.9 0s Cutting planes: Gomory: 3 Mod-K: 1 Explored 858 nodes (16586 simplex iterations) in 0.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%