Build (method = -2) #dp: 11233 Step-3' Graph: 305 vertices and 904 arcs (0.10s) Step-4' Graph: 89 vertices and 472 arcs (0.10s) #V4/#V3 = 0.29 #A4/#A3 = 0.52 Ready! (0.10s) Optimize a model with 133 rows, 473 columns and 1249 nonzeros Presolve removed 19 rows and 36 columns Presolve time: 0.01s Presolved: 114 rows, 437 columns, 1178 nonzeros Variable types: 0 continuous, 437 integer (70 binary) Found heuristic solution: objective 85.0000000 Found heuristic solution: objective 61.0000000 Optimize a model with 114 rows, 437 columns and 1178 nonzeros Presolved: 114 rows, 437 columns, 1178 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.450e+02 Factor NZ : 1.070e+03 Factor Ops : 1.304e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.88662975e+02 -8.10629309e+02 4.19e+02 1.09e-01 4.77e+00 0s 1 8.66609500e+01 -4.15188199e+02 2.22e+01 3.89e-16 7.04e-01 0s 2 4.21738949e+01 -6.38182235e+01 2.38e-01 3.33e-16 1.19e-01 0s 3 2.24894045e+01 -1.68506645e+00 1.65e-02 3.33e-16 2.68e-02 0s 4 2.01702396e+01 1.88739028e+01 1.03e-13 2.43e-16 1.43e-03 0s 5 2.00004415e+01 1.99992252e+01 5.15e-14 2.84e-16 1.35e-06 0s 6 2.00000000e+01 2.00000000e+01 5.23e-14 2.65e-16 1.35e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.00000000e+01 Root relaxation: objective 2.000000e+01, 294 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20.00000 0 4 61.00000 20.00000 67.2% - 0s H 0 0 21.0000000 20.00000 4.76% - 0s * 0 0 0 20.0000000 20.00000 0.0% - 0s Cutting planes: Gomory: 1 MIR: 2 Zero half: 2 Explored 0 nodes (430 simplex iterations) in 0.03 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0% Preprocessing time: 0.11 seconds Gurobi run time: 0.03 seconds Total run time: 0.15 seconds Objective: 20 Solution: 2 x [11, 31, 33, 34, 40] 1 x [3, 14, 22, 32, 32] 3 x [11, 24, 31, 34, 38] 1 x [18, 30, 37, 42, 43] 1 x [19, 30, 30, 34, 42] 1 x [9, 17, 26, 29, 40] 1 x [7, 8, 9, 28, 44] 2 x [2, 5, 18, 27, 35] 2 x [4, 12, 27, 39, 44] 1 x [6, 6, 13, 20, 25] 1 x [1, 13, 15, 25, 41] 1 x [14, 23, 36, 36, 36] 2 x [10, 19, 20, 21, 41] 1 x [9, 12, 12, 16, 41]