Build (method = -2) #dp: 15149 Step-3' Graph: 396 vertices and 1176 arcs (0.14s) Step-4' Graph: 134 vertices and 652 arcs (0.14s) #V4/#V3 = 0.34 #A4/#A3 = 0.55 Ready! (0.14s) Optimize a model with 178 rows, 653 columns and 1700 nonzeros Presolve removed 30 rows and 58 columns Presolve time: 0.01s Presolved: 148 rows, 595 columns, 1587 nonzeros Variable types: 0 continuous, 595 integer (84 binary) Found heuristic solution: objective 85.0000000 Found heuristic solution: objective 64.0000000 Optimize a model with 148 rows, 595 columns and 1587 nonzeros Presolved: 148 rows, 595 columns, 1587 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.660e+02 Factor NZ : 1.689e+03 Factor Ops : 2.400e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.22785621e+02 -1.13413015e+03 6.97e+02 1.27e-01 5.05e+00 0s 1 9.84014787e+01 -5.98359318e+02 5.71e+01 3.33e-16 8.21e-01 0s 2 4.90818610e+01 -8.73239265e+01 1.80e-02 3.33e-16 1.13e-01 0s 3 2.14169008e+01 -1.06470793e+01 2.39e-03 4.02e-16 2.63e-02 0s 4 1.75697079e+01 1.22795717e+01 4.80e-05 3.89e-16 4.34e-03 0s 5 1.66973673e+01 1.65985814e+01 2.39e-08 3.67e-16 8.10e-05 0s 6 1.66666669e+01 1.66666655e+01 3.98e-13 3.00e-16 1.11e-09 0s 7 1.66666667e+01 1.66666667e+01 4.57e-13 3.33e-16 1.18e-15 0s Barrier solved model in 7 iterations and 0.01 seconds Optimal objective 1.66666667e+01 Root relaxation: objective 1.666667e+01, 380 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.66667 0 9 64.00000 16.66667 74.0% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (446 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.15 seconds Gurobi run time: 0.02 seconds Total run time: 0.17 seconds Objective: 17 Solution: 2 x [4, 11, 14, 24, 33, 42] 1 x [19, 24, 32, 36, 40, 43] 1 x [1, 2, 3, 7, 19, 32] 3 x [20, 30, 31, 34, 38, 41] 2 x [9, 12, 21, 31, 34, 44] 1 x [2, 27, 27, 27, 27, 29] 1 x [8, 15, 26, 28, 34] 2 x [10, 18, 25, 36, 39, 40] 1 x [18, 22, 23, 37, 41] 1 x [9, 11, 16, 17, 19, 44] 2 x [5, 6, 11, 12, 13, 35]