Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:59 2012 Optimize a model with 384 rows, 90 columns and 768 nonzeros Presolve removed 132 rows and 2 columns Presolve time: 0.00s Presolved: 252 rows, 88 columns, 593 nonzeros Variable types: 0 continuous, 88 integer (88 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.483333e+01, 128 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.83333 0 77 28.00000 34.83333 24.4% - 0s 0 0 34.00000 0 81 28.00000 34.00000 21.4% - 0s H 0 0 29.0000000 34.00000 17.2% - 0s 0 0 33.60714 0 85 29.00000 33.60714 15.9% - 0s 0 0 33.36242 0 85 29.00000 33.36242 15.0% - 0s 0 0 33.34861 0 87 29.00000 33.34861 15.0% - 0s 0 0 33.13409 0 87 29.00000 33.13409 14.3% - 0s 0 0 32.97831 0 87 29.00000 32.97831 13.7% - 0s 0 0 32.93612 0 85 29.00000 32.93612 13.6% - 0s 0 0 32.84367 0 86 29.00000 32.84367 13.3% - 0s 0 0 32.81296 0 84 29.00000 32.81296 13.1% - 0s 0 0 32.72379 0 86 29.00000 32.72379 12.8% - 0s 0 0 32.69909 0 85 29.00000 32.69909 12.8% - 0s H 0 0 31.0000000 32.69909 5.48% - 0s 0 0 32.67838 0 86 31.00000 32.67838 5.41% - 0s 0 0 32.67838 0 85 31.00000 32.67838 5.41% - 0s 0 2 32.66866 0 85 31.00000 32.66866 5.38% - 0s Cutting planes: Gomory: 1 Zero half: 31 Explored 13 nodes (895 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%