Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:39:23 2012 Optimize a model with 151 rows, 111 columns and 486 nonzeros Presolve time: 0.00s Presolved: 151 rows, 111 columns, 486 nonzeros Variable types: 0 continuous, 111 integer (111 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 0.000000e+00, 57 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 35 30.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.75065 0 36 22.00000 0.75065 96.6% - 0s H 0 0 20.0000000 0.75065 96.2% - 0s 0 0 1.26836 0 38 20.00000 1.26836 93.7% - 0s 0 0 1.50544 0 38 20.00000 1.50544 92.5% - 0s 0 0 1.52131 0 39 20.00000 1.52131 92.4% - 0s 0 0 1.52131 0 39 20.00000 1.52131 92.4% - 0s 0 2 1.52202 0 39 20.00000 1.52202 92.4% - 0s H 27 13 18.0000000 5.04688 72.0% 27.0 0s * 28 13 6 15.0000000 5.04688 66.4% 28.1 0s Cutting planes: Gomory: 3 Zero half: 5 Explored 80 nodes (2169 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%