Build (method = -2) #dp: 15238 Step-3' Graph: 371 vertices and 1105 arcs (0.11s) Step-4' Graph: 81 vertices and 525 arcs (0.11s) #V4/#V3 = 0.22 #A4/#A3 = 0.48 Ready! (0.11s) Optimize a model with 154 rows, 526 columns and 1421 nonzeros Presolve removed 25 rows and 49 columns Presolve time: 0.00s Presolved: 129 rows, 477 columns, 1323 nonzeros Variable types: 0 continuous, 477 integer (64 binary) Found heuristic solution: objective 182.0000000 Found heuristic solution: objective 92.0000000 Optimize a model with 129 rows, 477 columns and 1323 nonzeros Presolved: 129 rows, 477 columns, 1323 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.430e+02 Factor NZ : 1.134e+03 Factor Ops : 1.607e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.39350930e+02 -1.30094503e+03 4.08e+02 5.59e-02 6.48e+00 0s 1 2.08007087e+02 -5.68211753e+02 1.31e+01 2.22e-16 8.92e-01 0s 2 8.90569509e+01 -8.54948888e+01 2.03e-02 2.22e-16 1.75e-01 0s 3 5.10253918e+01 3.44342486e+01 3.31e-04 1.53e-16 1.64e-02 0s 4 5.01710930e+01 4.99506146e+01 3.58e-13 2.27e-16 2.18e-04 0s 5 5.00000013e+01 4.99999929e+01 2.33e-13 2.22e-16 8.29e-09 0s 6 5.00000000e+01 5.00000000e+01 1.09e-13 1.16e-16 8.70e-15 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 342 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 50.0000000 50.00000 0.0% - 0s Explored 0 nodes (342 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 0.12 seconds Gurobi run time: 0.02 seconds Total run time: 0.13 seconds Objective: 50 Solution: 3 x [16, 63, 66, 73] 3 x [42, 51, 65, 72] 4 x [58, 67, 69, 71] 1 x [10, 46, 50, 71] 1 x [8, 32, 53, 70] 1 x [14, 21, 55, 68] 4 x [18, 19, 47, 64] 2 x [13, 21, 49, 62] 1 x [5, 6, 14, 62] 1 x [2, 2, 12, 61] 3 x [22, 30, 36, 60] 3 x [44, 48, 54, 59] 1 x [9, 9, 11, 58] 3 x [33, 37, 39, 57] 3 x [40, 46, 52, 56] 1 x [5, 8, 20, 55] 1 x [3, 5, 27, 53] 1 x [7, 26, 34, 47] 2 x [12, 25, 38, 46] 1 x [43, 43, 43, 45] 1 x [5, 13, 29, 41] 2 x [1, 3, 7, 35] 2 x [7, 17, 24, 31] 1 x [5, 7, 23, 28] 4 x [4, 10, 15, 24]