Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:13 2012 Optimize a model with 291 rows, 108 columns and 582 nonzeros Presolve removed 45 rows and 4 columns Presolve time: 0.00s Presolved: 246 rows, 104 columns, 515 nonzeros Variable types: 0 continuous, 104 integer (104 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 4.850000e+01, 143 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 48.50000 0 79 40.00000 48.50000 21.2% - 0s 0 0 46.66667 0 100 40.00000 46.66667 16.7% - 0s 0 0 46.44444 0 102 40.00000 46.44444 16.1% - 0s 0 0 46.00000 0 103 40.00000 46.00000 15.0% - 0s 0 0 46.00000 0 97 40.00000 46.00000 15.0% - 0s 0 0 45.91935 0 102 40.00000 45.91935 14.8% - 0s H 0 0 41.0000000 45.91935 12.0% - 0s 0 0 45.83333 0 101 41.00000 45.83333 11.8% - 0s H 0 0 42.0000000 45.83333 9.13% - 0s 0 0 45.79389 0 104 42.00000 45.79389 9.03% - 0s 0 0 45.69796 0 104 42.00000 45.69796 8.80% - 0s H 0 0 43.0000000 45.69796 6.27% - 0s 0 0 45.57059 0 103 43.00000 45.57059 5.98% - 0s 0 0 45.42568 0 103 43.00000 45.42568 5.64% - 0s 0 0 45.27143 0 104 43.00000 45.27143 5.28% - 0s 0 0 45.21907 0 104 43.00000 45.21907 5.16% - 0s 0 0 45.18090 0 103 43.00000 45.18090 5.07% - 0s 0 0 45.13588 0 103 43.00000 45.13588 4.97% - 0s 0 0 45.13588 0 102 43.00000 45.13588 4.97% - 0s 0 2 45.11310 0 101 43.00000 45.11310 4.91% - 0s Cutting planes: Gomory: 1 Zero half: 53 Explored 13 nodes (1154 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0%