Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:09 2012 Optimize a model with 644 rows, 108 columns and 1288 nonzeros Presolve removed 249 rows and 0 columns Presolve time: 0.00s Presolved: 395 rows, 108 columns, 1032 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.614872e+01, 244 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.14872 0 107 24.00000 36.14872 50.6% - 0s H 0 0 26.0000000 36.14872 39.0% - 0s 0 0 35.79199 0 107 26.00000 35.79199 37.7% - 0s 0 0 35.48634 0 106 26.00000 35.48634 36.5% - 0s 0 0 35.13840 0 107 26.00000 35.13840 35.1% - 0s 0 0 34.99211 0 105 26.00000 34.99211 34.6% - 0s 0 0 34.76787 0 106 26.00000 34.76787 33.7% - 0s 0 0 34.63513 0 105 26.00000 34.63513 33.2% - 0s 0 0 34.56930 0 105 26.00000 34.56930 33.0% - 0s 0 0 34.51618 0 105 26.00000 34.51618 32.8% - 0s 0 0 34.48875 0 105 26.00000 34.48875 32.6% - 0s 0 0 34.48429 0 104 26.00000 34.48429 32.6% - 0s 0 0 34.46810 0 106 26.00000 34.46810 32.6% - 0s 0 0 34.46806 0 106 26.00000 34.46806 32.6% - 0s 0 0 34.46806 0 106 26.00000 34.46806 32.6% - 0s 0 2 34.46669 0 106 26.00000 34.46669 32.6% - 0s H 56 21 28.0000000 34.12605 21.9% 26.6 0s 1691 244 29.33333 30 56 28.00000 30.73077 9.75% 26.5 5s Cutting planes: Gomory: 7 Clique: 2 Zero half: 33 Explored 2645 nodes (61319 simplex iterations) in 5.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%