Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:05 2012 Optimize a model with 464 rows, 94 columns and 928 nonzeros Presolve removed 171 rows and 0 columns Presolve time: 0.00s Presolved: 293 rows, 94 columns, 733 nonzeros Variable types: 0 continuous, 94 integer (94 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 3.350000e+01, 166 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.50000 0 59 23.00000 33.50000 45.7% - 0s H 0 0 25.0000000 33.50000 34.0% - 0s 0 0 32.96019 0 91 25.00000 32.96019 31.8% - 0s 0 0 32.89313 0 92 25.00000 32.89313 31.6% - 0s 0 0 32.79417 0 92 25.00000 32.79417 31.2% - 0s H 0 0 26.0000000 32.79417 26.1% - 0s 0 0 32.67464 0 91 26.00000 32.67464 25.7% - 0s H 0 0 27.0000000 32.67464 21.0% - 0s 0 0 32.63260 0 92 27.00000 32.63260 20.9% - 0s 0 0 32.53125 0 85 27.00000 32.53125 20.5% - 0s 0 0 32.43094 0 85 27.00000 32.43094 20.1% - 0s H 0 0 28.0000000 32.43094 15.8% - 0s 0 0 32.38331 0 87 28.00000 32.38331 15.7% - 0s 0 0 32.26718 0 89 28.00000 32.26718 15.2% - 0s 0 0 32.23951 0 89 28.00000 32.23951 15.1% - 0s 0 0 32.13218 0 89 28.00000 32.13218 14.8% - 0s 0 0 32.09917 0 90 28.00000 32.09917 14.6% - 0s H 0 0 29.0000000 32.09917 10.7% - 0s 0 0 32.04168 0 90 29.00000 32.04168 10.5% - 0s 0 0 32.03329 0 93 29.00000 32.03329 10.5% - 0s 0 0 32.03329 0 92 29.00000 32.03329 10.5% - 0s H 0 0 30.0000000 32.03329 6.78% - 0s 0 2 32.03329 0 92 30.00000 32.03329 6.78% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 27 Explored 19 nodes (1340 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%