current bounds on the number of colors: 0 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:15:59 2012 Optimize a model with 16101 rows, 1917 columns and 49425 nonzeros Presolve time: 0.06s Presolved: 16101 rows, 1917 columns, 49425 nonzeros Variable types: 0 continuous, 1917 integer (1917 binary) Root relaxation: objective 0.000000e+00, 104 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 (283 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 18:16:00 2012 Optimize a model with 7755 rows, 1254 columns and 23724 nonzeros Presolve time: 0.02s Presolved: 7755 rows, 1254 columns, 23724 nonzeros Variable types: 0 continuous, 1254 integer (1254 binary) Root relaxation: objective 0.000000e+00, 110 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 (872 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% current bounds on the number of colors: 0 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:00 2012 Optimize a model with 3903 rows, 948 columns and 11862 nonzeros Presolve time: 0.01s Presolved: 3903 rows, 948 columns, 11862 nonzeros Variable types: 0 continuous, 948 integer (948 binary) Root relaxation: objective 0.000000e+00, 104 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 64 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3140 simplex iterations) in 0.37 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 18:16:00 2012 Optimize a model with 5829 rows, 1101 columns and 17793 nonzeros Presolve time: 0.02s Presolved: 5829 rows, 1101 columns, 17793 nonzeros Variable types: 0 continuous, 1101 integer (1101 binary) Root relaxation: objective 0.000000e+00, 110 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 30 - 0.00000 - - 0s 0 0 0.00000 0 24 - 0.00000 - - 0s 0 0 0.00000 0 112 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 103 - 0.00000 - - 1s 0 0 0.00000 0 139 - 0.00000 - - 2s 0 0 0.00000 0 125 - 0.00000 - - 2s 0 0 0.00000 0 122 - 0.00000 - - 2s 0 0 0.00000 0 84 - 0.00000 - - 3s 0 0 0.00000 0 240 - 0.00000 - - 3s 0 0 0.00000 0 189 - 0.00000 - - 4s 0 0 0.00000 0 151 - 0.00000 - - 5s 0 0 0.00000 0 212 - 0.00000 - - 5s 0 0 0.00000 0 212 - 0.00000 - - 6s 0 2 0.00000 0 212 - 0.00000 - - 6s 314 14 infeasible 14 - 0.00000 - 123 10s Cutting planes: Clique: 134 Zero half: 3 Explored 533 nodes (103496 simplex iterations) in 12.02 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 18:16:13 2012 Optimize a model with 6471 rows, 1152 columns and 19770 nonzeros Presolve time: 0.02s Presolved: 6471 rows, 1152 columns, 19770 nonzeros Variable types: 0 continuous, 1152 integer (1152 binary) Root relaxation: objective 0.000000e+00, 110 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 30 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1005 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