Build (method = -2) #dp: 26697 Step-3' Graph: 221 vertices and 656 arcs (0.22s) Step-4' Graph: 24 vertices and 262 arcs (0.22s) #V4/#V3 = 0.11 #A4/#A3 = 0.40 Ready! (0.22s) Optimize a model with 68 rows, 263 columns and 745 nonzeros Presolve removed 6 rows and 7 columns Presolve time: 0.00s Presolved: 62 rows, 256 columns, 727 nonzeros Variable types: 0 continuous, 256 integer (169 binary) Found heuristic solution: objective 45.0000000 Optimize a model with 62 rows, 256 columns and 727 nonzeros Presolved: 62 rows, 256 columns, 727 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.860e+02 Factor NZ : 7.620e+02 Factor Ops : 1.396e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.15279174e+02 -5.38874307e+02 8.85e+01 4.17e-02 3.73e+00 0s 1 6.22419290e+01 -1.24033195e+02 3.11e+00 4.44e-16 4.30e-01 0s 2 2.22411440e+01 -1.01168720e+01 2.19e-03 2.22e-16 6.37e-02 0s 3 1.15568765e+01 4.18382288e+00 1.23e-04 2.41e-03 1.44e-02 0s 4 1.00481328e+01 9.63755343e+00 2.23e-07 5.55e-16 7.98e-04 0s 5 1.00000104e+01 9.99996329e+00 1.95e-11 3.33e-16 9.16e-08 0s 6 1.00000000e+01 1.00000000e+01 3.56e-14 2.31e-16 9.20e-14 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 1.00000000e+01 Root relaxation: objective 1.000000e+01, 187 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 (187 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: 0.23 seconds Gurobi run time: 0.01 seconds Total run time: 0.24 seconds Objective: 10 Solution: 1 x [4, 9, 16, 19, 28] 1 x [1, 10, 18, 26, 44] 1 x [8, 18, 25, 38, 42] 1 x [2, 2, 21, 29, 29] 1 x [3, 20, 31, 37, 40] 1 x [15, 24, 30, 39, 41] 1 x [13, 22, 23, 33, 36] 1 x [12, 14, 17, 32, 36] 1 x [6, 7, 34, 35, 43] 1 x [5, 7, 11, 27, 35]