current bounds on the number of colors: 0 -- 31 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:49 2012 Optimize a model with 3676 rows, 708 columns and 11400 nonzeros Presolve time: 0.01s Presolved: 3676 rows, 708 columns, 11400 nonzeros Variable types: 0 continuous, 708 integer (708 binary) Root relaxation: objective 0.000000e+00, 66 iterations, 0.00 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 (144 simplex iterations) in 0.02 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:49 2012 Optimize a model with 1732 rows, 460 columns and 5320 nonzeros Presolve time: 0.00s Presolved: 1732 rows, 460 columns, 5320 nonzeros Variable types: 0 continuous, 460 integer (460 binary) Root relaxation: objective 0.000000e+00, 63 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 34 - 0.00000 - - 0s 0 0 0.00000 0 24 - 0.00000 - - 0s 0 0 0.00000 0 83 - 0.00000 - - 0s 0 0 0.00000 0 98 - 0.00000 - - 0s 0 0 0.00000 0 57 - 0.00000 - - 0s 0 0 0.00000 0 59 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 0s 0 0 0.00000 0 37 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 0s 0 2 0.00000 0 70 - 0.00000 - - 0s Cutting planes: Clique: 25 Zero half: 4 Explored 28 nodes (9608 simplex iterations) in 0.80 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:50 2012 Optimize a model with 2704 rows, 584 columns and 8360 nonzeros Presolve time: 0.01s Presolved: 2704 rows, 584 columns, 8360 nonzeros Variable types: 0 continuous, 584 integer (584 binary) Root relaxation: objective 0.000000e+00, 78 iterations, 0.00 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 (260 simplex iterations) in 0.02 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: 7 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:50 2012 Optimize a model with 2218 rows, 522 columns and 6840 nonzeros Presolve time: 0.01s Presolved: 2218 rows, 522 columns, 6840 nonzeros Variable types: 0 continuous, 522 integer (522 binary) Root relaxation: objective 0.000000e+00, 72 iterations, 0.00 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 (388 simplex iterations) in 0.02 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:50 2012 Optimize a model with 1975 rows, 491 columns and 6080 nonzeros Presolve time: 0.01s Presolved: 1975 rows, 491 columns, 6080 nonzeros Variable types: 0 continuous, 491 integer (491 binary) Root relaxation: objective 0.000000e+00, 68 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 28 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (376 simplex iterations) in 0.02 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: 8