Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:13:58 2012 Optimize a model with 427 rows, 423 columns and 1488 nonzeros Presolve removed 0 rows and 30 columns Presolve time: 0.00s Presolved: 427 rows, 393 columns, 1458 nonzeros Variable types: 0 continuous, 393 integer (392 binary) Found heuristic solution: objective 69.0000000 Root relaxation: objective 0.000000e+00, 231 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 0 165 69.00000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s H 0 0 44.0000000 0.00000 100% - 0s 0 0 0.20288 0 167 44.00000 0.20288 100% - 0s H 0 0 41.0000000 0.20288 100% - 0s H 0 0 39.0000000 0.20288 99.5% - 0s 0 0 0.74306 0 171 39.00000 0.74306 98.1% - 0s H 0 0 35.0000000 0.74306 97.9% - 0s 0 0 0.74392 0 172 35.00000 0.74392 97.9% - 0s 0 0 0.74392 0 172 35.00000 0.74392 97.9% - 0s H 0 0 33.0000000 0.74392 97.7% - 0s H 0 0 31.0000000 0.74392 97.6% - 0s 0 2 0.74515 0 171 31.00000 0.74515 97.6% - 0s H 27 27 27.0000000 1.00000 96.3% 33.6 0s * 50 40 31 14.0000000 1.00000 92.9% 26.1 0s * 53 34 33 13.0000000 1.00000 92.3% 26.6 0s * 74 45 13 12.0000000 1.00000 91.7% 29.3 0s Cutting planes: Gomory: 3 Zero half: 6 Mod-K: 1 Explored 841 nodes (25189 simplex iterations) in 0.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%