current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:26:27 2012 Optimize a model with 18773 rows, 2098 columns and 57538 nonzeros Presolve time: 0.08s Presolved: 18773 rows, 2098 columns, 57538 nonzeros Variable types: 0 continuous, 2098 integer (2098 binary) Root relaxation: objective 0.000000e+00, 110 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (302 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:26:27 2012 Optimize a model with 9413 rows, 1409 columns and 28769 nonzeros Presolve time: 0.03s Presolved: 9413 rows, 1409 columns, 28769 nonzeros Variable types: 0 continuous, 1409 integer (1409 binary) Root relaxation: objective 0.000000e+00, 113 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (662 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:26:27 2012 Optimize a model with 4373 rows, 1038 columns and 13278 nonzeros Presolve time: 0.01s Presolved: 4373 rows, 1038 columns, 13278 nonzeros Variable types: 0 continuous, 1038 integer (1038 binary) Root relaxation: objective 0.000000e+00, 108 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 74 - 0.00000 - - 0s 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3213 simplex iterations) in 0.41 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 6 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:26:28 2012 Optimize a model with 6533 rows, 1197 columns and 19917 nonzeros Presolve time: 0.02s Presolved: 6533 rows, 1197 columns, 19917 nonzeros Variable types: 0 continuous, 1197 integer (1197 binary) Root relaxation: objective 0.000000e+00, 119 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 0.00000 0 75 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 1s 0 0 0.00000 0 255 - 0.00000 - - 1s 0 0 0.00000 0 248 - 0.00000 - - 2s 0 0 0.00000 0 188 - 0.00000 - - 3s 0 0 0.00000 0 184 - 0.00000 - - 3s 0 0 0.00000 0 249 - 0.00000 - - 4s 0 0 0.00000 0 236 - 0.00000 - - 5s 0 0 0.00000 0 164 - 0.00000 - - 6s 0 0 0.00000 0 243 - 0.00000 - - 7s 0 0 0.00000 0 256 - 0.00000 - - 7s 0 0 0.00000 0 256 - 0.00000 - - 8s 0 2 0.00000 0 256 - 0.00000 - - 9s 33 7 0.00000 10 153 - 0.00000 - 254 10s Cutting planes: Clique: 183 Zero half: 3 Explored 71 nodes (59468 simplex iterations) in 10.66 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:26:39 2012 Optimize a model with 7973 rows, 1303 columns and 24343 nonzeros Presolve time: 0.02s Presolved: 7973 rows, 1303 columns, 24343 nonzeros Variable types: 0 continuous, 1303 integer (1303 binary) Root relaxation: objective 0.000000e+00, 114 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 30 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 43 MIR: 2 Zero half: 55 Explored 0 nodes (1975 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:26:39 2012 Optimize a model with 7253 rows, 1250 columns and 22130 nonzeros Presolve time: 0.02s Presolved: 7253 rows, 1250 columns, 22130 nonzeros Variable types: 0 continuous, 1250 integer (1250 binary) Root relaxation: objective 0.000000e+00, 120 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 45 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 167 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 1s 0 0 0.00000 0 45 - 0.00000 - - 1s 0 0 0.00000 0 18 - 0.00000 - - 2s 0 0 0.00000 0 16 - 0.00000 - - 2s 0 0 0.00000 0 31 - 0.00000 - - 3s 0 0 0.00000 0 95 - 0.00000 - - 3s 0 0 0.00000 0 82 - 0.00000 - - 4s 0 0 0.00000 0 163 - 0.00000 - - 4s 0 0 0.00000 0 91 - 0.00000 - - 5s 0 0 0.00000 0 90 - 0.00000 - - 5s 0 0 0.00000 0 145 - 0.00000 - - 6s 0 0 0.00000 0 145 - 0.00000 - - 7s 0 2 0.00000 0 145 - 0.00000 - - 8s 64 8 0.00000 12 103 - 0.00000 - 108 10s 920 21 infeasible 26 - 0.00000 - 78.4 15s 1014 28 0.00000 11 107 - 0.00000 - 77.1 20s * 1014 26 15 0.0000000 0.00000 0.0% 77.1 20s Cutting planes: Gomory: 33 Clique: 51 Zero half: 93 Explored 1014 nodes (136352 simplex iterations) in 20.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 10