Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:01 2012 Optimize a model with 391 rows, 91 columns and 782 nonzeros Presolve removed 131 rows and 0 columns Presolve time: 0.00s Presolved: 260 rows, 91 columns, 632 nonzeros Variable types: 0 continuous, 91 integer (91 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.400000e+01, 144 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.00000 0 85 28.00000 34.00000 21.4% - 0s H 0 0 29.0000000 34.00000 17.2% - 0s 0 0 33.53002 0 88 29.00000 33.53002 15.6% - 0s 0 0 33.17491 0 91 29.00000 33.17491 14.4% - 0s 0 0 33.12752 0 90 29.00000 33.12752 14.2% - 0s 0 0 33.01564 0 90 29.00000 33.01564 13.8% - 0s 0 0 32.97578 0 90 29.00000 32.97578 13.7% - 0s H 0 0 30.0000000 32.97578 9.92% - 0s 0 0 32.96419 0 91 30.00000 32.96419 9.88% - 0s 0 0 32.96419 0 91 30.00000 32.96419 9.88% - 0s 0 2 32.96412 0 91 30.00000 32.96412 9.88% - 0s Cutting planes: Gomory: 1 Zero half: 31 Explored 52 nodes (1454 simplex iterations) in 0.08 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%