Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:22:44 2012 Optimize a model with 461 rows, 445 columns and 1595 nonzeros Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 461 rows, 421 columns, 1571 nonzeros Variable types: 0 continuous, 421 integer (420 binary) Found heuristic solution: objective 82.0000000 Root relaxation: objective 0.000000e+00, 280 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 0 184 82.00000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s H 0 0 48.0000000 0.00000 100% - 0s H 0 0 45.0000000 0.00000 100% - 0s 0 0 0.49202 0 185 45.00000 0.49202 98.9% - 0s H 0 0 44.0000000 0.49202 98.9% - 0s 0 0 1.00000 0 188 44.00000 1.00000 97.7% - 0s H 0 0 40.0000000 1.00000 97.5% - 0s 0 0 1.00000 0 189 40.00000 1.00000 97.5% - 0s 0 0 1.00000 0 188 40.00000 1.00000 97.5% - 0s H 0 0 37.0000000 1.00000 97.3% - 0s 0 2 1.00000 0 184 37.00000 1.00000 97.3% - 0s H 27 27 31.0000000 1.37565 95.6% 56.0 0s * 39 34 22 15.0000000 1.37565 90.8% 43.5 0s * 214 90 59 14.0000000 5.97101 57.3% 27.1 0s * 263 54 10 13.0000000 6.45963 50.3% 28.0 0s Cutting planes: Gomory: 2 Zero half: 1 Explored 446 nodes (13706 simplex iterations) in 0.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%