Build (method = -2) #dp: 8028 Step-3' Graph: 308 vertices and 917 arcs (0.07s) Step-4' Graph: 92 vertices and 485 arcs (0.07s) #V4/#V3 = 0.30 #A4/#A3 = 0.53 Ready! (0.07s) Optimize a model with 137 rows, 486 columns and 1278 nonzeros Presolve removed 25 rows and 49 columns Presolve time: 0.00s Presolved: 112 rows, 437 columns, 1180 nonzeros Variable types: 0 continuous, 437 integer (70 binary) Found heuristic solution: objective 81.0000000 Found heuristic solution: objective 65.0000000 Optimize a model with 112 rows, 437 columns and 1180 nonzeros Presolved: 112 rows, 437 columns, 1180 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.400e+02 Factor NZ : 1.045e+03 Factor Ops : 1.238e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.95918206e+02 -1.90705935e+03 8.67e+02 9.27e-02 1.44e+01 0s 1 1.73160458e+02 -8.98205749e+02 6.13e+01 5.55e-16 1.92e+00 0s 2 7.89805720e+01 -1.38291072e+02 2.62e-02 4.44e-16 2.43e-01 0s 3 4.19694760e+01 -1.36443457e+01 1.22e-03 4.44e-16 6.17e-02 0s 4 2.34310117e+01 8.58543031e+00 2.43e-04 2.81e-16 1.64e-02 0s 5 2.03436173e+01 1.91172523e+01 6.50e-06 2.38e-16 1.36e-03 0s 6 2.00000950e+01 1.99996199e+01 4.65e-10 3.33e-16 5.26e-07 0s 7 2.00000000e+01 2.00000000e+01 3.72e-13 2.23e-16 5.32e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 2.00000000e+01 Root relaxation: objective 2.000000e+01, 283 iterations, 0.01 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 (327 simplex iterations) in 0.02 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: 0.08 seconds Gurobi run time: 0.02 seconds Total run time: 0.10 seconds Objective: 20 Solution: 1 x [5, 5, 5, 40, 45] 2 x [8, 11, 17, 34, 44] 2 x [2, 9, 18, 43, 43] 3 x [15, 25, 27, 36, 42] 1 x [21, 23, 33, 35, 42] 3 x [14, 22, 23, 29, 42] 2 x [11, 16, 26, 28, 41] 2 x [10, 16, 31, 32, 39] 1 x [6, 6, 30, 37, 38] 1 x [1, 2, 7, 15, 34] 1 x [9, 13, 19, 20, 24] 1 x [2, 3, 4, 7, 12]