Build (method = -2) #dp: 838 Step-3' Graph: 45 vertices and 128 arcs (0.00s) Step-4' Graph: 7 vertices and 52 arcs (0.00s) #V4/#V3 = 0.16 #A4/#A3 = 0.41 Ready! (0.00s) Optimize a model with 17 rows, 53 columns and 149 nonzeros Presolve removed 3 rows and 3 columns Presolve time: 0.00s Presolved: 14 rows, 50 columns, 142 nonzeros Variable types: 0 continuous, 50 integer (0 binary) Found heuristic solution: objective 101.0000000 Found heuristic solution: objective 100.0000000 Optimize a model with 14 rows, 50 columns and 142 nonzeros Presolved: 14 rows, 50 columns, 142 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.200e+01 Factor NZ : 1.050e+02 Factor Ops : 1.015e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.05085577e+02 -1.00034082e+03 9.14e+01 2.22e-16 3.79e+01 0s 1 1.35044354e+02 -3.38673055e+02 5.32e+00 3.33e-16 5.32e+00 0s 2 5.20214492e+01 -3.74592708e+01 2.47e-03 1.04e-14 8.26e-01 0s 3 2.22816864e+01 5.48111352e+00 1.25e-04 1.58e-15 1.54e-01 0s 4 2.04897837e+01 1.97055910e+01 1.39e-14 1.40e-16 7.19e-03 0s 5 2.04002395e+01 2.03985382e+01 6.66e-15 2.22e-16 1.56e-05 0s 6 2.04000000e+01 2.04000000e+01 9.55e-15 2.22e-16 1.57e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.04000000e+01 Root relaxation: objective 2.040000e+01, 37 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20.40000 0 8 100.00000 20.40000 79.6% - 0s H 0 0 21.0000000 20.40000 2.86% - 0s Explored 0 nodes (49 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 21 Solution: 1 x [2, 4, 7, 9, 10] 1 x [3, 3, 8, 10] 10 x [4, 6, 7, 8, 9] 5 x [2, 3, 4, 5, 7] 1 x [1, 3, 8] 3 x [2, 6, 6, 8, 9]