Build (method = -2) #dp: 7211 Step-3' Graph: 104 vertices and 301 arcs (0.03s) Step-4' Graph: 14 vertices and 121 arcs (0.03s) #V4/#V3 = 0.13 #A4/#A3 = 0.40 Ready! (0.03s) Optimize a model with 33 rows, 122 columns and 346 nonzeros Presolve removed 4 rows and 6 columns Presolve time: 0.00s Presolved: 29 rows, 116 columns, 334 nonzeros Variable types: 0 continuous, 116 integer (5 binary) Found heuristic solution: objective 198.0000000 Found heuristic solution: objective 153.0000000 Optimize a model with 29 rows, 116 columns and 334 nonzeros Presolved: 29 rows, 116 columns, 334 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.270e+02 Factor NZ : 3.550e+02 Factor Ops : 5.755e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.84850379e+02 -1.23414773e+03 3.62e+02 5.83e-02 3.74e+01 0s 1 2.13371345e+02 -6.52031370e+02 2.51e+01 4.44e-16 5.15e+00 0s 2 9.29034682e+01 -5.94258603e+01 1.53e-03 4.44e-16 6.15e-01 0s 3 4.34784729e+01 2.22974583e+01 1.09e-04 1.39e-16 8.47e-02 0s 4 4.03334755e+01 3.81450109e+01 1.23e-05 1.84e-16 8.75e-03 0s 5 4.00119813e+01 3.99733155e+01 4.00e-14 3.33e-16 1.55e-04 0s 6 4.00000002e+01 3.99999993e+01 5.41e-14 9.50e-17 3.78e-09 0s 7 4.00000000e+01 4.00000000e+01 3.12e-14 1.11e-16 4.14e-15 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 4.00000000e+01 Root relaxation: objective 4.000000e+01, 99 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 40.0000000 40.00000 0.0% - 0s Explored 0 nodes (99 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.00 seconds Total run time: 0.04 seconds Objective: 40 Solution: 1 x [8, 9, 15, 15, 18] 3 x [5, 8, 9, 16, 18] 11 x [1, 2, 3, 8, 9] 6 x [6, 12, 14, 16, 17] 2 x [2, 7, 12, 13, 16] 5 x [2, 7, 11, 16, 18] 1 x [1, 6, 13, 16, 16] 1 x [1, 2, 4, 13, 14] 9 x [2, 4, 13, 17, 19] 1 x [1, 2, 10, 11, 13]