Build (method = -2) #dp: 9617 Step-3' Graph: 255 vertices and 758 arcs (0.08s) Step-4' Graph: 72 vertices and 392 arcs (0.08s) #V4/#V3 = 0.28 #A4/#A3 = 0.52 Ready! (0.08s) Optimize a model with 112 rows, 393 columns and 1039 nonzeros Presolve removed 19 rows and 33 columns Presolve time: 0.00s Presolved: 93 rows, 360 columns, 969 nonzeros Variable types: 0 continuous, 360 integer (45 binary) Found heuristic solution: objective 88.0000000 Found heuristic solution: objective 44.0000000 Optimize a model with 93 rows, 360 columns and 969 nonzeros Presolved: 93 rows, 360 columns, 969 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.400e+02 Factor NZ : 8.810e+02 Factor Ops : 1.038e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.56958281e+02 -1.31982832e+03 4.24e+02 1.09e-01 7.20e+00 0s 1 1.44919373e+02 -4.71961220e+02 3.30e+01 3.33e-16 1.14e+00 0s 2 7.29630744e+01 -1.32954478e+02 2.89e+00 1.89e-15 2.90e-01 0s 3 2.83696626e+01 -1.98272135e+00 3.69e-14 2.22e-16 4.07e-02 0s 4 2.08986444e+01 1.75993835e+01 3.60e-14 2.91e-16 4.42e-03 0s 5 2.00136392e+01 1.99812943e+01 6.42e-14 3.33e-16 4.33e-05 0s 6 2.00000000e+01 2.00000000e+01 7.89e-14 2.54e-16 9.24e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.00000000e+01 Root relaxation: objective 2.000000e+01, 238 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 20.0000000 20.00000 0.0% - 0s Explored 0 nodes (275 simplex iterations) in 0.01 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: 0.09 seconds Gurobi run time: 0.01 seconds Total run time: 0.11 seconds Objective: 20 Solution: 1 x [5, 12, 19, 32, 34] 1 x [4, 9, 9, 19, 26] 4 x [2, 3, 21, 32, 34] 1 x [1, 17, 17, 31, 35] 3 x [29, 33, 34, 38, 40] 2 x [18, 22, 22, 26, 40] 1 x [16, 16, 19, 37, 39] 1 x [6, 7, 30, 31, 37] 1 x [9, 13, 23, 28, 36] 1 x [8, 11, 25, 30, 35] 1 x [13, 15, 18, 20, 28] 1 x [10, 10, 22, 27, 27] 2 x [14, 19, 24, 25, 26]