Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:11 2012 Optimize a model with 266 rows, 103 columns and 532 nonzeros Presolve removed 38 rows and 5 columns Presolve time: 0.00s Presolved: 228 rows, 98 columns, 472 nonzeros Variable types: 0 continuous, 98 integer (98 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 4.650000e+01, 125 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.50000 0 77 39.00000 46.50000 19.2% - 0s H 0 0 40.0000000 46.50000 16.2% - 0s 0 0 46.00000 0 78 40.00000 46.00000 15.0% - 0s 0 0 46.00000 0 94 40.00000 46.00000 15.0% - 0s 0 0 45.60000 0 87 40.00000 45.60000 14.0% - 0s H 0 0 42.0000000 45.60000 8.57% - 0s 0 0 45.40000 0 91 42.00000 45.40000 8.10% - 0s 0 0 45.33333 0 94 42.00000 45.33333 7.94% - 0s 0 0 44.81250 0 95 42.00000 44.81250 6.70% - 0s 0 0 44.52941 0 96 42.00000 44.52941 6.02% - 0s 0 0 44.40000 0 89 42.00000 44.40000 5.71% - 0s 0 0 44.33333 0 82 42.00000 44.33333 5.56% - 0s 0 0 44.20000 0 95 42.00000 44.20000 5.24% - 0s 0 0 44.16514 0 97 42.00000 44.16514 5.16% - 0s 0 0 44.05263 0 97 42.00000 44.05263 4.89% - 0s 0 0 44.02646 0 97 42.00000 44.02646 4.82% - 0s 0 0 44.02646 0 96 42.00000 44.02646 4.82% - 0s 0 2 44.02564 0 96 42.00000 44.02564 4.82% - 0s Cutting planes: Clique: 1 Zero half: 46 Explored 19 nodes (1088 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%