Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:54 2012 Optimize a model with 380 rows, 86 columns and 760 nonzeros Presolve removed 128 rows and 0 columns Presolve time: 0.00s Presolved: 252 rows, 86 columns, 613 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.183333e+01, 178 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 31.83333 0 82 25.00000 31.83333 27.3% - 0s 0 0 31.00000 0 82 25.00000 31.00000 24.0% - 0s 0 0 31.00000 0 81 25.00000 31.00000 24.0% - 0s H 0 0 26.0000000 31.00000 19.2% - 0s 0 0 30.92593 0 84 26.00000 30.92593 18.9% - 0s 0 0 30.70355 0 85 26.00000 30.70355 18.1% - 0s 0 0 30.62248 0 84 26.00000 30.62248 17.8% - 0s 0 0 30.51718 0 82 26.00000 30.51718 17.4% - 0s 0 0 30.45809 0 84 26.00000 30.45809 17.1% - 0s 0 0 30.40070 0 84 26.00000 30.40070 16.9% - 0s 0 0 30.35591 0 86 26.00000 30.35591 16.8% - 0s 0 0 30.35508 0 86 26.00000 30.35508 16.8% - 0s 0 0 30.35508 0 86 26.00000 30.35508 16.8% - 0s 0 2 30.35392 0 86 26.00000 30.35392 16.7% - 0s * 12 3 2 28.0000000 30.21797 7.92% 31.2 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 44 Explored 25 nodes (1281 simplex iterations) in 0.08 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%