current bounds on the number of colors: 0 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:15 2012 Optimize a model with 2210 rows, 506 columns and 6890 nonzeros Presolve time: 0.01s Presolved: 2210 rows, 506 columns, 6890 nonzeros Variable types: 0 continuous, 506 integer (506 binary) Root relaxation: objective 0.000000e+00, 56 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 (160 simplex iterations) in 0.01 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:15 2012 Optimize a model with 1034 rows, 324 columns and 3180 nonzeros Presolve time: 0.00s Presolved: 1034 rows, 324 columns, 3180 nonzeros Variable types: 0 continuous, 324 integer (324 binary) Root relaxation: objective 0.000000e+00, 53 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 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (753 simplex iterations) in 0.04 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:15 2012 Optimize a model with 1538 rows, 402 columns and 4770 nonzeros Presolve time: 0.00s Presolved: 1538 rows, 402 columns, 4770 nonzeros Variable types: 0 continuous, 402 integer (402 binary) Root relaxation: objective 0.000000e+00, 57 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 12 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (305 simplex iterations) in 0.01 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:15 2012 Optimize a model with 1202 rows, 350 columns and 3710 nonzeros Presolve time: 0.00s Presolved: 1202 rows, 350 columns, 3710 nonzeros Variable types: 0 continuous, 350 integer (350 binary) Root relaxation: objective 0.000000e+00, 52 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 26 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (359 simplex iterations) in 0.01 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: 7