Build (method = -2) #dp: 21296 Step-3' Graph: 306 vertices and 911 arcs (0.19s) Step-4' Graph: 45 vertices and 389 arcs (0.19s) #V4/#V3 = 0.15 #A4/#A3 = 0.43 Ready! (0.19s) Optimize a model with 112 rows, 390 columns and 1084 nonzeros Presolve removed 9 rows and 17 columns Presolve time: 0.01s Presolved: 103 rows, 373 columns, 1048 nonzeros Variable types: 0 continuous, 373 integer (176 binary) Found heuristic solution: objective 50.0000000 Optimize a model with 103 rows, 373 columns and 1048 nonzeros Presolved: 103 rows, 373 columns, 1048 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.200e+02 Factor NZ : 9.610e+02 Factor Ops : 1.487e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.92191301e+02 -8.18349063e+02 1.59e+02 3.83e-02 4.40e+00 0s 1 8.76981791e+01 -2.78318817e+02 3.18e+00 2.22e-16 5.34e-01 0s 2 4.37811045e+01 -1.32947567e+01 9.98e-14 3.33e-16 7.58e-02 0s 3 2.58204453e+01 2.00701846e+01 1.40e-13 2.22e-16 7.49e-03 0s 4 2.50040564e+01 2.49943788e+01 3.87e-14 1.68e-16 1.26e-05 0s 5 2.50000000e+01 2.50000000e+01 8.84e-13 1.11e-16 1.30e-11 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 2.50000000e+01 Root relaxation: objective 2.500000e+01, 274 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 25.00000 0 5 50.00000 25.00000 50.0% - 0s H 0 0 26.0000000 25.00000 3.85% - 0s H 0 0 25.0000000 25.00000 0.0% - 0s Explored 0 nodes (330 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0% Preprocessing time: 0.20 seconds Gurobi run time: 0.02 seconds Total run time: 0.22 seconds Objective: 25 Solution: 1 x [11, 15, 23, 23] 1 x [15, 15, 64, 65] 1 x [9, 14, 57, 63] 1 x [7, 13, 40, 40] 2 x [8, 12, 20, 59] 3 x [7, 10, 25, 30] 1 x [1, 7, 52, 60] 1 x [6, 54, 54, 67] 1 x [5, 47, 55, 66] 1 x [4, 47, 53, 58] 1 x [3, 47, 50, 53] 1 x [2, 16, 19, 62] 1 x [2, 2, 29, 31] 1 x [17, 21, 49, 62] 1 x [17, 21, 33, 61] 1 x [17, 22, 26, 61] 1 x [42, 46, 51, 56] 1 x [24, 27, 28, 49] 1 x [33, 38, 39, 48] 1 x [32, 33, 35, 48] 1 x [36, 37, 44, 45] 1 x [18, 34, 41, 43]