current bounds on the number of colors: 0 -- 49 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:30 2012 Optimize a model with 14785 rows, 1790 columns and 45384 nonzeros Presolve time: 0.06s Presolved: 14785 rows, 1790 columns, 45384 nonzeros Variable types: 0 continuous, 1790 integer (1790 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (282 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:30 2012 Optimize a model with 7417 rows, 1202 columns and 22692 nonzeros Presolve time: 0.02s Presolved: 7417 rows, 1202 columns, 22692 nonzeros Variable types: 0 continuous, 1202 integer (1202 binary) Root relaxation: objective 0.000000e+00, 109 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 37 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1160 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 18:11:30 2012 Optimize a model with 3733 rows, 908 columns and 11346 nonzeros Presolve time: 0.01s Presolved: 3733 rows, 908 columns, 11346 nonzeros Variable types: 0 continuous, 908 integer (908 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 74 - 0.00000 - - 0s 0 0 0.00000 0 66 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2486 simplex iterations) in 0.35 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 18:11:31 2012 Optimize a model with 5575 rows, 1055 columns and 17019 nonzeros Presolve time: 0.02s Presolved: 5575 rows, 1055 columns, 17019 nonzeros Variable types: 0 continuous, 1055 integer (1055 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 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 112 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 118 - 0.00000 - - 1s 0 0 0.00000 0 108 - 0.00000 - - 1s 0 0 0.00000 0 116 - 0.00000 - - 2s 0 0 0.00000 0 91 - 0.00000 - - 2s 0 0 0.00000 0 107 - 0.00000 - - 3s 0 0 0.00000 0 192 - 0.00000 - - 3s 0 0 0.00000 0 84 - 0.00000 - - 4s 0 2 0.00000 0 84 - 0.00000 - - 5s 517 23 0.00000 11 136 - 0.00000 - 115 10s 1083 5 infeasible 11 - 0.00000 - 117 15s Cutting planes: Clique: 80 Zero half: 7 Explored 1121 nodes (160704 simplex iterations) in 15.41 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 18:11:46 2012 Optimize a model with 6189 rows, 1104 columns and 18910 nonzeros Presolve time: 0.02s Presolved: 6189 rows, 1104 columns, 18910 nonzeros Variable types: 0 continuous, 1104 integer (1104 binary) Root relaxation: objective 0.000000e+00, 105 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 42 - 0.00000 - - 0s 0 0 0.00000 0 71 - 0.00000 - - 0s Explored 0 nodes (1838 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