Build (method = -2) #dp: 6329 Step-3' Graph: 239 vertices and 709 arcs (0.05s) Step-4' Graph: 59 vertices and 349 arcs (0.05s) #V4/#V3 = 0.25 #A4/#A3 = 0.49 Ready! (0.05s) Optimize a model with 106 rows, 350 columns and 937 nonzeros Presolve removed 17 rows and 33 columns Presolve time: 0.00s Presolved: 89 rows, 317 columns, 871 nonzeros Variable types: 0 continuous, 317 integer (43 binary) Found heuristic solution: objective 106.0000000 Found heuristic solution: objective 53.0000000 Optimize a model with 89 rows, 317 columns and 871 nonzeros Presolved: 89 rows, 317 columns, 871 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.690e+02 Factor NZ : 7.200e+02 Factor Ops : 8.410e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.88464464e+02 -8.10848582e+02 2.65e+02 8.33e-02 5.99e+00 0s 1 1.19795594e+02 -3.47619795e+02 1.26e+01 4.44e-16 8.56e-01 0s 2 5.08965624e+01 -2.62147155e+01 3.09e-13 1.67e-16 1.16e-01 0s 3 3.11307680e+01 2.41135984e+01 5.04e-14 4.51e-16 1.05e-02 0s 4 3.00020330e+01 2.99878409e+01 7.59e-14 1.11e-16 2.12e-05 0s 5 3.00000000e+01 3.00000000e+01 3.49e-14 2.02e-16 2.18e-11 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.00000000e+01 Root relaxation: objective 3.000000e+01, 231 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 30.0000000 30.00000 0.0% - 0s Explored 0 nodes (261 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0% Preprocessing time: 0.06 seconds Gurobi run time: 0.01 seconds Total run time: 0.08 seconds Objective: 30 Solution: 2 x [19, 25, 28, 47] 1 x [16, 20, 35, 46] 1 x [6, 12, 35, 45] 1 x [1, 3, 5, 45] 3 x [4, 39, 41, 44] 3 x [11, 34, 37, 43] 2 x [9, 36, 42, 42] 1 x [6, 12, 31, 40] 1 x [2, 2, 30, 38] 1 x [1, 7, 15, 36] 1 x [6, 12, 20, 35] 1 x [13, 13, 22, 34] 1 x [17, 17, 22, 33] 2 x [18, 25, 27, 32] 1 x [22, 23, 23, 29] 3 x [10, 21, 24, 26] 5 x [8, 14, 16, 20]