current bounds on the number of colors: 0 -- 41 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:59 2012 Optimize a model with 8641 rows, 1250 columns and 26620 nonzeros Presolve time: 0.03s Presolved: 8641 rows, 1250 columns, 26620 nonzeros Variable types: 0 continuous, 1250 integer (1250 binary) Root relaxation: objective 0.000000e+00, 102 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 (378 simplex iterations) in 0.06 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 -- 20 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:59 2012 Optimize a model with 4341 rows, 840 columns and 13310 nonzeros Presolve time: 0.01s Presolved: 4341 rows, 840 columns, 13310 nonzeros Variable types: 0 continuous, 840 integer (840 binary) Root relaxation: objective 0.000000e+00, 93 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 32 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (570 simplex iterations) in 0.04 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:00 2012 Optimize a model with 2191 rows, 635 columns and 6655 nonzeros Presolve time: 0.01s Presolved: 2191 rows, 635 columns, 6655 nonzeros Variable types: 0 continuous, 635 integer (635 binary) Root relaxation: objective 0.000000e+00, 84 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 60 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1691 simplex iterations) in 0.15 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: 5 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:00 2012 Optimize a model with 3051 rows, 717 columns and 9317 nonzeros Presolve time: 0.01s Presolved: 3051 rows, 717 columns, 9317 nonzeros Variable types: 0 continuous, 717 integer (717 binary) Root relaxation: objective 0.000000e+00, 82 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 42 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 179 - 0.00000 - - 0s 0 0 0.00000 0 219 - 0.00000 - - 0s 0 0 0.00000 0 215 - 0.00000 - - 0s 0 0 0.00000 0 233 - 0.00000 - - 1s 0 0 0.00000 0 232 - 0.00000 - - 1s 0 0 0.00000 0 222 - 0.00000 - - 1s 0 0 0.00000 0 212 - 0.00000 - - 2s 0 0 0.00000 0 180 - 0.00000 - - 2s 0 0 0.00000 0 197 - 0.00000 - - 3s 0 0 0.00000 0 212 - 0.00000 - - 3s 0 0 0.00000 0 212 - 0.00000 - - 3s 0 2 0.00000 0 212 - 0.00000 - - 4s Cutting planes: Clique: 67 Zero half: 14 Explored 5 nodes (29695 simplex iterations) in 4.11 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: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:04 2012 Optimize a model with 3481 rows, 758 columns and 10648 nonzeros Presolve time: 0.01s Presolved: 3481 rows, 758 columns, 10648 nonzeros Variable types: 0 continuous, 758 integer (758 binary) Root relaxation: objective 0.000000e+00, 82 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 43 - 0.00000 - - 0s 0 0 0.00000 0 39 - 0.00000 - - 0s 0 0 0.00000 0 139 - 0.00000 - - 0s 0 0 0.00000 0 161 - 0.00000 - - 0s 0 0 0.00000 0 88 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 175 - 0.00000 - - 1s 0 0 0.00000 0 24 - 0.00000 - - 1s 0 2 0.00000 0 24 - 0.00000 - - 1s Cutting planes: Clique: 27 Zero half: 1 Explored 55 nodes (18137 simplex iterations) in 1.85 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: 8 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:01:06 2012 Optimize a model with 3911 rows, 799 columns and 11979 nonzeros Presolve time: 0.01s Presolved: 3911 rows, 799 columns, 11979 nonzeros Variable types: 0 continuous, 799 integer (799 binary) Root relaxation: objective 0.000000e+00, 86 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 42 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Clique: 49 MIR: 2 Zero half: 53 Explored 0 nodes (1113 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: 9