current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:14:48 2012 Optimize a model with 16225 rows, 1897 columns and 49775 nonzeros Presolve time: 0.06s Presolved: 16225 rows, 1897 columns, 49775 nonzeros Variable types: 0 continuous, 1897 integer (1897 binary) Root relaxation: objective 0.000000e+00, 144 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 (489 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:14:49 2012 Optimize a model with 7814 rows, 1247 columns and 23892 nonzeros Presolve time: 0.02s Presolved: 7814 rows, 1247 columns, 23892 nonzeros Variable types: 0 continuous, 1247 integer (1247 binary) Root relaxation: objective 0.000000e+00, 108 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 (785 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 18:14:49 2012 Optimize a model with 3932 rows, 947 columns and 11946 nonzeros Presolve time: 0.01s Presolved: 3932 rows, 947 columns, 11946 nonzeros Variable types: 0 continuous, 947 integer (947 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 68 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2179 simplex iterations) in 0.32 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 18:14:49 2012 Optimize a model with 5873 rows, 1097 columns and 17919 nonzeros Presolve time: 0.02s Presolved: 5873 rows, 1097 columns, 17919 nonzeros Variable types: 0 continuous, 1097 integer (1097 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 48 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 132 - 0.00000 - - 0s 0 0 0.00000 0 170 - 0.00000 - - 0s 0 0 0.00000 0 135 - 0.00000 - - 1s 0 0 0.00000 0 127 - 0.00000 - - 2s 0 0 0.00000 0 143 - 0.00000 - - 2s 0 0 0.00000 0 154 - 0.00000 - - 3s 0 0 0.00000 0 236 - 0.00000 - - 3s 0 0 0.00000 0 236 - 0.00000 - - 4s 0 2 0.00000 0 236 - 0.00000 - - 5s Cutting planes: Clique: 99 Zero half: 4 Explored 263 nodes (64761 simplex iterations) in 8.24 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 18:14:58 2012 Optimize a model with 6520 rows, 1147 columns and 19910 nonzeros Presolve time: 0.02s Presolved: 6520 rows, 1147 columns, 19910 nonzeros Variable types: 0 continuous, 1147 integer (1147 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 36 - 0.00000 - - 0s 0 0 0.00000 0 29 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 0s 0 0 0.00000 0 211 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 1s 0 0 0.00000 0 40 - 0.00000 - - 1s 0 0 0.00000 0 125 - 0.00000 - - 2s 0 0 0.00000 0 107 - 0.00000 - - 2s 0 0 0.00000 0 76 - 0.00000 - - 3s 0 0 0.00000 0 51 - 0.00000 - - 3s * 0 0 0 0.0000000 0.00000 0.0% - 3s Cutting planes: Clique: 11 Zero half: 29 Explored 0 nodes (30885 simplex iterations) in 3.95 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