current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:48 2012 Optimize a model with 13824 rows, 1726 columns and 42480 nonzeros Presolve time: 0.05s Presolved: 13824 rows, 1726 columns, 42480 nonzeros Variable types: 0 continuous, 1726 integer (1726 binary) Root relaxation: objective 0.000000e+00, 126 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 (470 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:08:48 2012 Optimize a model with 6936 rows, 1150 columns and 21240 nonzeros Presolve time: 0.02s Presolved: 6936 rows, 1150 columns, 21240 nonzeros Variable types: 0 continuous, 1150 integer (1150 binary) Root relaxation: objective 0.000000e+00, 111 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 21 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1223 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 18:08:48 2012 Optimize a model with 3492 rows, 862 columns and 10620 nonzeros Presolve time: 0.01s Presolved: 3492 rows, 862 columns, 10620 nonzeros Variable types: 0 continuous, 862 integer (862 binary) Root relaxation: objective 0.000000e+00, 97 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 70 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1970 simplex iterations) in 0.24 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 18:08:48 2012 Optimize a model with 5214 rows, 1006 columns and 15930 nonzeros Presolve time: 0.01s Presolved: 5214 rows, 1006 columns, 15930 nonzeros Variable types: 0 continuous, 1006 integer (1006 binary) Root relaxation: objective 0.000000e+00, 102 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 52 - 0.00000 - - 0s 0 0 0.00000 0 51 - 0.00000 - - 0s 0 0 0.00000 0 64 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 0s 0 0 0.00000 0 133 - 0.00000 - - 1s 0 0 0.00000 0 176 - 0.00000 - - 1s 0 0 0.00000 0 147 - 0.00000 - - 1s 0 0 0.00000 0 140 - 0.00000 - - 2s 0 0 0.00000 0 139 - 0.00000 - - 2s 0 0 0.00000 0 123 - 0.00000 - - 2s 0 0 0.00000 0 154 - 0.00000 - - 3s 0 0 0.00000 0 154 - 0.00000 - - 3s 0 2 0.00000 0 154 - 0.00000 - - 4s 88 8 0.00000 11 101 - 0.00000 - 108 5s Cutting planes: Clique: 58 Zero half: 38 Explored 213 nodes (50100 simplex iterations) in 5.92 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 18:08:55 2012 Optimize a model with 5788 rows, 1054 columns and 17700 nonzeros Presolve time: 0.02s Presolved: 5788 rows, 1054 columns, 17700 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Root relaxation: objective 0.000000e+00, 102 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 32 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (892 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% optimal solution found: number of colors: 10