Build (method = -2) #dp: 6655 Step-3' Graph: 244 vertices and 722 arcs (0.06s) Step-4' Graph: 53 vertices and 340 arcs (0.06s) #V4/#V3 = 0.22 #A4/#A3 = 0.47 Ready! (0.06s) Optimize a model with 102 rows, 341 columns and 924 nonzeros Presolve removed 9 rows and 16 columns Presolve time: 0.00s Presolved: 93 rows, 325 columns, 892 nonzeros Variable types: 0 continuous, 325 integer (52 binary) Found heuristic solution: objective 106.0000000 Found heuristic solution: objective 58.0000000 Optimize a model with 93 rows, 325 columns and 892 nonzeros Presolved: 93 rows, 325 columns, 892 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.840e+02 Factor NZ : 9.210e+02 Factor Ops : 1.474e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.07170736e+02 -6.07726033e+02 2.43e+02 7.67e-02 4.69e+00 0s 1 8.09556140e+01 -2.99574289e+02 3.33e+00 4.44e-16 6.01e-01 0s 2 4.34902279e+01 -4.95336927e+00 2.24e-03 2.22e-16 7.12e-02 0s 3 3.04738085e+01 2.60265736e+01 3.79e-05 2.12e-16 6.48e-03 0s 4 3.00047844e+01 2.99954939e+01 6.87e-14 1.51e-16 1.35e-05 0s 5 3.00000000e+01 3.00000000e+01 2.09e-14 2.22e-16 1.43e-11 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.00000000e+01 Root relaxation: objective 3.000000e+01, 228 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 30.00000 0 7 58.00000 30.00000 48.3% - 0s H 0 0 31.0000000 30.00000 3.23% - 0s H 0 0 30.0000000 30.00000 0.0% - 0s Explored 0 nodes (268 simplex iterations) in 0.02 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: 0.07 seconds Gurobi run time: 0.02 seconds Total run time: 0.09 seconds Objective: 30 Solution: 1 x [33, 33, 39, 49] 1 x [12, 18, 28, 49] 1 x [32, 42, 48, 48] 2 x [6, 16, 31, 47] 2 x [5, 23, 36, 46] 4 x [40, 42, 44, 45] 2 x [7, 15, 37, 43] 1 x [10, 14, 25, 41] 1 x [8, 8, 30, 40] 3 x [10, 25, 29, 38] 1 x [1, 3, 22, 35] 1 x [2, 4, 35, 35] 3 x [1, 19, 20, 34] 4 x [13, 17, 21, 32] 1 x [7, 9, 13, 27] 1 x [22, 24, 26, 26] 1 x [5, 9, 10, 11]