current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:43 2012 Optimize a model with 15200 rows, 1856 columns and 46700 nonzeros Presolve time: 0.06s Presolved: 15200 rows, 1856 columns, 46700 nonzeros Variable types: 0 continuous, 1856 integer (1856 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (290 simplex iterations) in 0.10 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:44 2012 Optimize a model with 7322 rows, 1206 columns and 22416 nonzeros Presolve time: 0.02s Presolved: 7322 rows, 1206 columns, 22416 nonzeros Variable types: 0 continuous, 1206 integer (1206 binary) Root relaxation: objective 0.000000e+00, 106 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 36 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (821 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:44 2012 Optimize a model with 3686 rows, 906 columns and 11208 nonzeros Presolve time: 0.01s Presolved: 3686 rows, 906 columns, 11208 nonzeros Variable types: 0 continuous, 906 integer (906 binary) Root relaxation: objective 0.000000e+00, 101 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 56 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2087 simplex iterations) in 0.23 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:44 2012 Optimize a model with 5504 rows, 1056 columns and 16812 nonzeros Presolve time: 0.01s Presolved: 5504 rows, 1056 columns, 16812 nonzeros Variable types: 0 continuous, 1056 integer (1056 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 38 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 179 - 0.00000 - - 0s 0 0 0.00000 0 189 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 1s 0 0 0.00000 0 145 - 0.00000 - - 1s 0 0 0.00000 0 129 - 0.00000 - - 2s 0 0 0.00000 0 103 - 0.00000 - - 3s 0 0 0.00000 0 166 - 0.00000 - - 3s 0 0 0.00000 0 138 - 0.00000 - - 3s 0 0 0.00000 0 159 - 0.00000 - - 4s 0 0 0.00000 0 135 - 0.00000 - - 4s 0 2 0.00000 0 135 - 0.00000 - - 5s 538 8 0.00000 10 127 - 0.00000 - 110 10s Cutting planes: Clique: 101 Zero half: 22 Explored 1190 nodes (150423 simplex iterations) in 14.11 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:58 2012 Optimize a model with 6110 rows, 1106 columns and 18680 nonzeros Presolve time: 0.02s Presolved: 6110 rows, 1106 columns, 18680 nonzeros Variable types: 0 continuous, 1106 integer (1106 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 28 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1067 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% optimal solution found: number of colors: 10