Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:40 2012 Optimize a model with 209 rows, 145 columns and 665 nonzeros Presolve time: 0.00s Presolved: 209 rows, 145 columns, 665 nonzeros Variable types: 0 continuous, 145 integer (145 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 0.000000e+00, 65 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 41 37.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 0 0.64024 0 42 32.00000 0.64024 98.0% - 0s 0 0 1.00000 0 43 32.00000 1.00000 96.9% - 0s 0 0 1.35709 0 44 32.00000 1.35709 95.8% - 0s 0 0 1.54767 0 44 32.00000 1.54767 95.2% - 0s 0 0 1.59506 0 45 32.00000 1.59506 95.0% - 0s 0 0 1.61172 0 48 32.00000 1.61172 95.0% - 0s 0 2 1.61927 0 48 32.00000 1.61927 94.9% - 0s * 32 27 20 30.0000000 3.53697 88.2% 27.1 0s * 58 37 15 29.0000000 3.63088 87.5% 25.0 0s * 121 77 12 28.0000000 6.22802 77.8% 27.3 0s * 199 133 16 27.0000000 7.70486 71.5% 28.1 0s * 373 167 13 26.0000000 11.06250 57.5% 24.4 0s Explored 1720 nodes (35944 simplex iterations) in 0.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%