Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:10:18 2012 Optimize a model with 91 rows, 87 columns and 312 nonzeros Presolve removed 0 rows and 4 columns Presolve time: 0.00s Presolved: 91 rows, 83 columns, 308 nonzeros Variable types: 0 continuous, 83 integer (82 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 0.000000e+00, 48 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 37 18.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.36835 0 39 10.00000 0.36835 96.3% - 0s 0 0 1.00065 0 45 10.00000 1.00065 90.0% - 0s H 0 0 6.0000000 1.00065 83.3% - 0s 0 2 1.04608 0 45 6.00000 1.04608 82.6% - 0s * 15 6 11 5.0000000 1.80234 64.0% 9.0 0s * 26 3 7 4.0000000 1.84677 53.8% 7.6 0s Cutting planes: Gomory: 4 Explored 32 nodes (466 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%