current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:30:14 2012 Optimize a model with 19791 rows, 2189 columns and 60669 nonzeros Presolve time: 0.08s Presolved: 19791 rows, 2189 columns, 60669 nonzeros Variable types: 0 continuous, 2189 integer (2189 binary) Root relaxation: objective 0.000000e+00, 130 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 (534 simplex iterations) in 0.15 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:30:14 2012 Optimize a model with 9557 rows, 1433 columns and 29211 nonzeros Presolve time: 0.03s Presolved: 9557 rows, 1433 columns, 29211 nonzeros Variable types: 0 continuous, 1433 integer (1433 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 (652 simplex iterations) in 0.07 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 18:30:14 2012 Optimize a model with 4440 rows, 1055 columns and 13482 nonzeros Presolve time: 0.01s Presolved: 4440 rows, 1055 columns, 13482 nonzeros Variable types: 0 continuous, 1055 integer (1055 binary) Root relaxation: objective 0.000000e+00, 111 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 64 - 0.00000 - - 0s 0 0 0.00000 0 64 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3119 simplex iterations) in 0.35 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 18:30:15 2012 Optimize a model with 6633 rows, 1217 columns and 20223 nonzeros Presolve time: 0.02s Presolved: 6633 rows, 1217 columns, 20223 nonzeros Variable types: 0 continuous, 1217 integer (1217 binary) Root relaxation: objective 0.000000e+00, 116 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 28 - 0.00000 - - 0s 0 0 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 1s 0 0 0.00000 0 217 - 0.00000 - - 1s 0 0 0.00000 0 149 - 0.00000 - - 2s 0 0 0.00000 0 131 - 0.00000 - - 2s 0 0 0.00000 0 194 - 0.00000 - - 3s 0 0 0.00000 0 228 - 0.00000 - - 4s 0 0 0.00000 0 141 - 0.00000 - - 5s 0 0 0.00000 0 179 - 0.00000 - - 6s 0 0 0.00000 0 177 - 0.00000 - - 6s 0 2 0.00000 0 174 - 0.00000 - - 7s 191 13 0.00000 14 134 - 0.00000 - 134 10s 558 9 0.00000 10 149 - 0.00000 - 143 15s Cutting planes: Clique: 231 Zero half: 3 Explored 662 nodes (138404 simplex iterations) in 16.64 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 18:30:32 2012 Optimize a model with 8095 rows, 1325 columns and 24717 nonzeros Presolve time: 0.02s Presolved: 8095 rows, 1325 columns, 24717 nonzeros Variable types: 0 continuous, 1325 integer (1325 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 0.00000 0 43 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1328 simplex iterations) in 0.11 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 18:30:32 2012 Optimize a model with 7364 rows, 1271 columns and 22470 nonzeros Presolve time: 0.02s Presolved: 7364 rows, 1271 columns, 22470 nonzeros Variable types: 0 continuous, 1271 integer (1271 binary) Root relaxation: objective 0.000000e+00, 115 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 48 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 0.00000 0 59 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 99 - 0.00000 - - 1s 0 0 0.00000 0 142 - 0.00000 - - 1s 0 0 0.00000 0 134 - 0.00000 - - 2s 0 0 0.00000 0 170 - 0.00000 - - 2s 0 0 0.00000 0 69 - 0.00000 - - 3s 0 0 0.00000 0 54 - 0.00000 - - 3s 0 0 0.00000 0 115 - 0.00000 - - 4s 0 0 0.00000 0 111 - 0.00000 - - 4s 0 0 0.00000 0 120 - 0.00000 - - 5s 0 0 0.00000 0 120 - 0.00000 - - 5s 0 2 0.00000 0 120 - 0.00000 - - 5s * 115 2 26 0.0000000 0.00000 0.0% 82.1 6s Cutting planes: Clique: 32 Zero half: 1 Explored 116 nodes (46219 simplex iterations) in 6.87 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