current bounds on the number of colors: 0 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:18:34 2012 Optimize a model with 16051 rows, 1915 columns and 49275 nonzeros Presolve time: 0.06s Presolved: 16051 rows, 1915 columns, 49275 nonzeros Variable types: 0 continuous, 1915 integer (1915 binary) Root relaxation: objective 0.000000e+00, 140 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 (373 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 18:18:35 2012 Optimize a model with 7731 rows, 1252 columns and 23652 nonzeros Presolve time: 0.02s Presolved: 7731 rows, 1252 columns, 23652 nonzeros Variable types: 0 continuous, 1252 integer (1252 binary) Root relaxation: objective 0.000000e+00, 107 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 24 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1110 simplex iterations) in 0.09 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 18:18:35 2012 Optimize a model with 3891 rows, 946 columns and 11826 nonzeros Presolve time: 0.01s Presolved: 3891 rows, 946 columns, 11826 nonzeros Variable types: 0 continuous, 946 integer (946 binary) Root relaxation: objective 0.000000e+00, 103 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 93 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1948 simplex iterations) in 0.26 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 18:18:35 2012 Optimize a model with 5811 rows, 1099 columns and 17739 nonzeros Presolve time: 0.02s Presolved: 5811 rows, 1099 columns, 17739 nonzeros Variable types: 0 continuous, 1099 integer (1099 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 60 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 123 - 0.00000 - - 1s 0 0 0.00000 0 119 - 0.00000 - - 2s 0 0 0.00000 0 119 - 0.00000 - - 3s 0 0 0.00000 0 26 - 0.00000 - - 3s 0 0 0.00000 0 22 - 0.00000 - - 3s 0 0 0.00000 0 20 - 0.00000 - - 4s 0 0 0.00000 0 118 - 0.00000 - - 4s 0 0 0.00000 0 139 - 0.00000 - - 5s 0 0 0.00000 0 64 - 0.00000 - - 5s 0 2 0.00000 0 64 - 0.00000 - - 6s Cutting planes: Clique: 52 Zero half: 4 Explored 127 nodes (51701 simplex iterations) in 8.21 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 18:18:44 2012 Optimize a model with 6451 rows, 1150 columns and 19710 nonzeros Presolve time: 0.02s Presolved: 6451 rows, 1150 columns, 19710 nonzeros Variable types: 0 continuous, 1150 integer (1150 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 38 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s Cutting planes: Clique: 3 Zero half: 1 Explored 0 nodes (1741 simplex iterations) in 0.16 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