current bounds on the number of colors: 0 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:59 2012 Optimize a model with 16301 rows, 1925 columns and 50025 nonzeros Presolve time: 0.06s Presolved: 16301 rows, 1925 columns, 50025 nonzeros Variable types: 0 continuous, 1925 integer (1925 binary) Root relaxation: objective 0.000000e+00, 128 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 (344 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 18:16:59 2012 Optimize a model with 7851 rows, 1262 columns and 24012 nonzeros Presolve time: 0.02s Presolved: 7851 rows, 1262 columns, 24012 nonzeros Variable types: 0 continuous, 1262 integer (1262 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 14 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1075 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:59 2012 Optimize a model with 3951 rows, 956 columns and 12006 nonzeros Presolve time: 0.01s Presolved: 3951 rows, 956 columns, 12006 nonzeros Variable types: 0 continuous, 956 integer (956 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 54 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2363 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 18:17:00 2012 Optimize a model with 5901 rows, 1109 columns and 18009 nonzeros Presolve time: 0.02s Presolved: 5901 rows, 1109 columns, 18009 nonzeros Variable types: 0 continuous, 1109 integer (1109 binary) Root relaxation: objective 0.000000e+00, 114 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 0 100 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 1s 0 0 0.00000 0 221 - 0.00000 - - 1s 0 0 0.00000 0 126 - 0.00000 - - 1s 0 0 0.00000 0 134 - 0.00000 - - 2s 0 0 0.00000 0 205 - 0.00000 - - 3s 0 0 0.00000 0 114 - 0.00000 - - 4s 0 0 0.00000 0 129 - 0.00000 - - 4s 0 0 0.00000 0 129 - 0.00000 - - 4s 0 2 0.00000 0 129 - 0.00000 - - 5s Cutting planes: Clique: 98 Zero half: 11 Explored 224 nodes (65524 simplex iterations) in 9.06 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 18:17:09 2012 Optimize a model with 6551 rows, 1160 columns and 20010 nonzeros Presolve time: 0.02s Presolved: 6551 rows, 1160 columns, 20010 nonzeros Variable types: 0 continuous, 1160 integer (1160 binary) Root relaxation: objective 0.000000e+00, 114 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1268 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% optimal solution found: number of colors: 10