Build (method = -2) #dp: 19179 Step-3' Graph: 206 vertices and 611 arcs (0.15s) Step-4' Graph: 37 vertices and 273 arcs (0.15s) #V4/#V3 = 0.18 #A4/#A3 = 0.45 Ready! (0.15s) Optimize a model with 75 rows, 274 columns and 752 nonzeros Presolve removed 9 rows and 14 columns Presolve time: 0.00s Presolved: 66 rows, 260 columns, 720 nonzeros Variable types: 0 continuous, 260 integer (123 binary) Found heuristic solution: objective 30.0000000 Found heuristic solution: objective 29.0000000 Found heuristic solution: objective 23.0000000 Optimize a model with 66 rows, 260 columns and 720 nonzeros Presolved: 66 rows, 260 columns, 720 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.030e+02 Factor NZ : 8.070e+02 Factor Ops : 1.440e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.45872753e+02 -5.60727162e+02 1.24e+02 6.31e-02 3.73e+00 0s 1 5.95672612e+01 -1.56295140e+02 5.35e+00 4.44e-16 4.89e-01 0s 2 2.65001402e+01 -2.52408546e+01 2.15e-01 2.22e-16 9.99e-02 0s 3 1.27364738e+01 2.30540335e+00 1.96e-02 2.08e-03 1.98e-02 0s 4 1.01152318e+01 9.55365422e+00 2.63e-04 2.22e-16 1.06e-03 0s 5 1.00001748e+01 9.99968398e+00 1.39e-08 2.74e-16 9.26e-07 0s 6 1.00000000e+01 1.00000000e+01 3.11e-12 1.11e-16 9.48e-13 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 1.00000000e+01 Root relaxation: objective 1.000000e+01, 179 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 10.0000000 10.00000 0.0% - 0s Explored 0 nodes (179 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0% Preprocessing time: 0.16 seconds Gurobi run time: 0.01 seconds Total run time: 0.17 seconds Objective: 10 Solution: 1 x [4, 7, 12, 15, 21] 1 x [7, 14, 18, 19, 19] 1 x [11, 17, 24, 26, 33] 1 x [7, 17, 20, 22, 32] 1 x [2, 6, 9, 16, 31] 1 x [1, 3, 5, 8, 13] 1 x [10, 27, 29, 37, 38] 1 x [2, 6, 23, 24, 32] 1 x [24, 28, 30, 35, 36] 1 x [25, 26, 31, 33, 34]