current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:14:40 2012 Optimize a model with 15450 rows, 1866 columns and 47450 nonzeros Presolve time: 0.06s Presolved: 15450 rows, 1866 columns, 47450 nonzeros Variable types: 0 continuous, 1866 integer (1866 binary) Root relaxation: objective 0.000000e+00, 120 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 (501 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 18:14:40 2012 Optimize a model with 7442 rows, 1216 columns and 22776 nonzeros Presolve time: 0.02s Presolved: 7442 rows, 1216 columns, 22776 nonzeros Variable types: 0 continuous, 1216 integer (1216 binary) Root relaxation: objective 0.000000e+00, 112 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 25 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (798 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 18:14:40 2012 Optimize a model with 3746 rows, 916 columns and 11388 nonzeros Presolve time: 0.01s Presolved: 3746 rows, 916 columns, 11388 nonzeros Variable types: 0 continuous, 916 integer (916 binary) Root relaxation: objective 0.000000e+00, 100 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 76 - 0.00000 - - 0s 0 0 0.00000 0 86 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1815 simplex iterations) in 0.23 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 18:14:41 2012 Optimize a model with 5594 rows, 1066 columns and 17082 nonzeros Presolve time: 0.02s Presolved: 5594 rows, 1066 columns, 17082 nonzeros Variable types: 0 continuous, 1066 integer (1066 binary) Root relaxation: objective 0.000000e+00, 115 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 50 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 155 - 0.00000 - - 1s 0 0 0.00000 0 200 - 0.00000 - - 1s 0 0 0.00000 0 135 - 0.00000 - - 2s 0 0 0.00000 0 102 - 0.00000 - - 2s 0 0 0.00000 0 162 - 0.00000 - - 3s 0 0 0.00000 0 202 - 0.00000 - - 3s 0 0 0.00000 0 200 - 0.00000 - - 4s 0 2 0.00000 0 160 - 0.00000 - - 4s 49 9 infeasible 12 - 0.00000 - 144 5s Cutting planes: Clique: 80 Zero half: 17 Explored 321 nodes (63816 simplex iterations) in 7.14 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 18:14:48 2012 Optimize a model with 6210 rows, 1116 columns and 18980 nonzeros Presolve time: 0.02s Presolved: 6210 rows, 1116 columns, 18980 nonzeros Variable types: 0 continuous, 1116 integer (1116 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 39 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1383 simplex iterations) in 0.11 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