current bounds on the number of colors: 0 -- 45 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:24 2012 Optimize a model with 11375 rows, 1505 columns and 34980 nonzeros Presolve time: 0.04s Presolved: 11375 rows, 1505 columns, 34980 nonzeros Variable types: 0 continuous, 1505 integer (1505 binary) Root relaxation: objective 0.000000e+00, 95 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 (285 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% current bounds on the number of colors: 0 -- 22 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:24 2012 Optimize a model with 5710 rows, 1010 columns and 17490 nonzeros Presolve time: 0.02s Presolved: 5710 rows, 1010 columns, 17490 nonzeros Variable types: 0 continuous, 1010 integer (1010 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 0.00000 0 14 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (995 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% current bounds on the number of colors: 0 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:24 2012 Optimize a model with 2620 rows, 740 columns and 7950 nonzeros Presolve time: 0.01s Presolved: 2620 rows, 740 columns, 7950 nonzeros Variable types: 0 continuous, 740 integer (740 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 60 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1544 simplex iterations) in 0.16 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:24 2012 Optimize a model with 4165 rows, 875 columns and 12720 nonzeros Presolve time: 0.01s Presolved: 4165 rows, 875 columns, 12720 nonzeros Variable types: 0 continuous, 875 integer (875 binary) Root relaxation: objective 0.000000e+00, 94 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 36 - 0.00000 - - 0s 0 0 0.00000 0 55 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 207 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 1s 0 0 0.00000 0 197 - 0.00000 - - 1s 0 0 0.00000 0 195 - 0.00000 - - 1s 0 0 0.00000 0 193 - 0.00000 - - 2s 0 0 0.00000 0 207 - 0.00000 - - 2s 0 0 0.00000 0 203 - 0.00000 - - 2s 0 0 0.00000 0 214 - 0.00000 - - 3s 0 0 0.00000 0 214 - 0.00000 - - 3s 0 2 0.00000 0 214 - 0.00000 - - 3s Cutting planes: Clique: 96 Zero half: 3 Explored 51 nodes (30802 simplex iterations) in 4.05 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:28 2012 Optimize a model with 4680 rows, 920 columns and 14310 nonzeros Presolve time: 0.01s Presolved: 4680 rows, 920 columns, 14310 nonzeros Variable types: 0 continuous, 920 integer (920 binary) Root relaxation: objective 0.000000e+00, 98 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 30 - 0.00000 - - 0s 0 0 0.00000 0 49 - 0.00000 - - 0s 0 0 0.00000 0 66 - 0.00000 - - 0s 0 0 0.00000 0 159 - 0.00000 - - 0s 0 0 0.00000 0 65 - 0.00000 - - 0s 0 0 0.00000 0 100 - 0.00000 - - 0s 0 0 0.00000 0 18 - 0.00000 - - 1s 0 0 0.00000 0 137 - 0.00000 - - 1s 0 0 0.00000 0 20 - 0.00000 - - 1s 0 0 0.00000 0 31 - 0.00000 - - 1s 0 0 0.00000 0 92 - 0.00000 - - 2s 0 0 0.00000 0 60 - 0.00000 - - 2s 0 2 0.00000 0 60 - 0.00000 - - 2s 587 12 0.00000 15 91 - 0.00000 - 58.4 5s * 719 3 19 0.0000000 0.00000 0.0% 59.0 5s Cutting planes: Clique: 26 Zero half: 5 Explored 720 nodes (63021 simplex iterations) in 5.43 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