current bounds on the number of colors: 0 -- 49 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:12:06 2012 Optimize a model with 14257 rows, 1768 columns and 43800 nonzeros Presolve time: 0.05s Presolved: 14257 rows, 1768 columns, 43800 nonzeros Variable types: 0 continuous, 1768 integer (1768 binary) Root relaxation: objective 0.000000e+00, 126 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 (424 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:12:07 2012 Optimize a model with 7153 rows, 1180 columns and 21900 nonzeros Presolve time: 0.02s Presolved: 7153 rows, 1180 columns, 21900 nonzeros Variable types: 0 continuous, 1180 integer (1180 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 10 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1224 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 18:12:07 2012 Optimize a model with 3601 rows, 886 columns and 10950 nonzeros Presolve time: 0.01s Presolved: 3601 rows, 886 columns, 10950 nonzeros Variable types: 0 continuous, 886 integer (886 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 72 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2405 simplex iterations) in 0.27 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 18:12:07 2012 Optimize a model with 5377 rows, 1033 columns and 16425 nonzeros Presolve time: 0.01s Presolved: 5377 rows, 1033 columns, 16425 nonzeros Variable types: 0 continuous, 1033 integer (1033 binary) Root relaxation: objective 0.000000e+00, 106 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 24 - 0.00000 - - 0s 0 0 0.00000 0 37 - 0.00000 - - 0s 0 0 0.00000 0 98 - 0.00000 - - 0s 0 0 0.00000 0 155 - 0.00000 - - 0s 0 0 0.00000 0 90 - 0.00000 - - 1s 0 0 0.00000 0 110 - 0.00000 - - 1s 0 0 0.00000 0 115 - 0.00000 - - 1s 0 0 0.00000 0 120 - 0.00000 - - 2s 0 0 0.00000 0 120 - 0.00000 - - 2s 0 2 0.00000 0 120 - 0.00000 - - 2s 352 15 infeasible 15 - 0.00000 - 84.8 5s Cutting planes: Clique: 71 Zero half: 4 Explored 789 nodes (103521 simplex iterations) in 8.88 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 18:12:16 2012 Optimize a model with 5969 rows, 1082 columns and 18250 nonzeros Presolve time: 0.02s Presolved: 5969 rows, 1082 columns, 18250 nonzeros Variable types: 0 continuous, 1082 integer (1082 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 22 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (913 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% optimal solution found: number of colors: 10