Build (method = -2) #dp: 837 Step-3' Graph: 53 vertices and 159 arcs (0.00s) Step-4' Graph: 6 vertices and 65 arcs (0.00s) #V4/#V3 = 0.11 #A4/#A3 = 0.41 Ready! (0.00s) Optimize a model with 26 rows, 66 columns and 192 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 24 rows, 64 columns, 188 nonzeros Variable types: 0 continuous, 64 integer (0 binary) Found heuristic solution: objective 364.0000000 Found heuristic solution: objective 351.0000000 Optimize a model with 24 rows, 64 columns and 188 nonzeros Presolved: 24 rows, 64 columns, 188 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.700e+01 Factor NZ : 3.000e+02 Factor Ops : 4.900e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.02809361e+02 -9.88481686e+02 4.84e+01 0.00e+00 2.72e+01 0s 1 2.45527347e+02 -3.20920037e+02 1.14e+00 4.44e-16 4.15e+00 0s 2 1.51565993e+02 2.12316200e+01 7.96e-02 3.05e-15 8.90e-01 0s 3 1.22853820e+02 1.15477597e+02 4.57e-04 3.33e-16 4.98e-02 0s 4 1.22031585e+02 1.21717645e+02 2.46e-05 3.99e-16 2.12e-03 0s 5 1.22000050e+02 1.21999849e+02 4.57e-14 5.55e-16 1.36e-06 0s 6 1.22000000e+02 1.22000000e+02 4.05e-14 4.44e-16 1.36e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 1.22000000e+02 Root relaxation: objective 1.220000e+02, 53 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 122.0000000 122.00000 0.0% - 0s Explored 0 nodes (53 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.220000000000e+02, best bound 1.220000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 122 Solution: 2 x [3, 5, 7] 13 x [3, 13, 20] 5 x [5, 14, 15] 11 x [1, 2, 10] 9 x [17, 18, 19] 1 x [6, 7, 8] 30 x [6, 9, 11] 24 x [4, 7, 17] 4 x [4, 5, 8] 2 x [1, 5, 9] 17 x [5, 12, 15] 2 x [5, 16, 18] 1 x [2, 5, 17] 1 x [2, 5, 13]