current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:13:59 2012 Optimize a model with 15650 rows, 1874 columns and 48050 nonzeros Presolve time: 0.06s Presolved: 15650 rows, 1874 columns, 48050 nonzeros Variable types: 0 continuous, 1874 integer (1874 binary) Root relaxation: objective 0.000000e+00, 121 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 (459 simplex iterations) in 0.13 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 18:13:59 2012 Optimize a model with 7538 rows, 1224 columns and 23064 nonzeros Presolve time: 0.02s Presolved: 7538 rows, 1224 columns, 23064 nonzeros Variable types: 0 continuous, 1224 integer (1224 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 (790 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 18:13:59 2012 Optimize a model with 3794 rows, 924 columns and 11532 nonzeros Presolve time: 0.01s Presolved: 3794 rows, 924 columns, 11532 nonzeros Variable types: 0 continuous, 924 integer (924 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 54 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2001 simplex iterations) in 0.26 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 18:14:00 2012 Optimize a model with 5666 rows, 1074 columns and 17298 nonzeros Presolve time: 0.02s Presolved: 5666 rows, 1074 columns, 17298 nonzeros Variable types: 0 continuous, 1074 integer (1074 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 46 - 0.00000 - - 0s 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 1s 0 0 0.00000 0 128 - 0.00000 - - 1s 0 0 0.00000 0 133 - 0.00000 - - 2s 0 0 0.00000 0 187 - 0.00000 - - 2s 0 0 0.00000 0 144 - 0.00000 - - 3s 0 0 0.00000 0 158 - 0.00000 - - 3s 0 0 0.00000 0 158 - 0.00000 - - 4s 0 2 0.00000 0 158 - 0.00000 - - 4s 8 4 0.00000 4 154 - 0.00000 - 270 5s Cutting planes: Clique: 75 Zero half: 2 Explored 518 nodes (78934 simplex iterations) in 8.81 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 18:14:09 2012 Optimize a model with 6290 rows, 1124 columns and 19220 nonzeros Presolve time: 0.02s Presolved: 6290 rows, 1124 columns, 19220 nonzeros Variable types: 0 continuous, 1124 integer (1124 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 30 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 23 MIR: 13 Zero half: 29 Explored 0 nodes (1639 simplex iterations) in 0.13 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