current bounds on the number of colors: 0 -- 40 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:57 2012 Optimize a model with 8060 rows, 1201 columns and 24860 nonzeros Presolve time: 0.03s Presolved: 8060 rows, 1201 columns, 24860 nonzeros Variable types: 0 continuous, 1201 integer (1201 binary) Root relaxation: objective 0.000000e+00, 89 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 (248 simplex iterations) in 0.05 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 17:59:57 2012 Optimize a model with 4050 rows, 801 columns and 12430 nonzeros Presolve time: 0.01s Presolved: 4050 rows, 801 columns, 12430 nonzeros Variable types: 0 continuous, 801 integer (801 binary) Root relaxation: objective 0.000000e+00, 96 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 (461 simplex iterations) in 0.03 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 17:59:57 2012 Optimize a model with 2045 rows, 601 columns and 6215 nonzeros Presolve time: 0.01s Presolved: 2045 rows, 601 columns, 6215 nonzeros Variable types: 0 continuous, 601 integer (601 binary) Root relaxation: objective 0.000000e+00, 81 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 56 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1457 simplex iterations) in 0.12 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 17:59:57 2012 Optimize a model with 2847 rows, 681 columns and 8701 nonzeros Presolve time: 0.01s Presolved: 2847 rows, 681 columns, 8701 nonzeros Variable types: 0 continuous, 681 integer (681 binary) Root relaxation: objective 0.000000e+00, 81 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 40 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 0s 0 0 0.00000 0 150 - 0.00000 - - 0s 0 0 0.00000 0 166 - 0.00000 - - 1s 0 0 0.00000 0 199 - 0.00000 - - 1s 0 0 0.00000 0 199 - 0.00000 - - 1s 0 2 0.00000 0 199 - 0.00000 - - 1s Cutting planes: Gomory: 1 Clique: 31 Zero half: 7 Explored 3 nodes (14549 simplex iterations) in 1.84 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 17:59:59 2012 Optimize a model with 3248 rows, 721 columns and 9944 nonzeros Presolve time: 0.01s Presolved: 3248 rows, 721 columns, 9944 nonzeros Variable types: 0 continuous, 721 integer (721 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 28 - 0.00000 - - 0s 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 0.00000 0 110 - 0.00000 - - 0s 0 0 0.00000 0 128 - 0.00000 - - 0s 0 0 0.00000 0 105 - 0.00000 - - 0s 0 0 0.00000 0 118 - 0.00000 - - 0s 0 0 0.00000 0 76 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 1s 0 0 0.00000 0 140 - 0.00000 - - 1s 0 0 0.00000 0 161 - 0.00000 - - 1s 0 0 0.00000 0 148 - 0.00000 - - 1s 0 2 0.00000 0 148 - 0.00000 - - 1s Cutting planes: Clique: 25 Zero half: 10 Explored 29 nodes (19574 simplex iterations) in 2.04 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 18:00:01 2012 Optimize a model with 3649 rows, 761 columns and 11187 nonzeros Presolve time: 0.01s Presolved: 3649 rows, 761 columns, 11187 nonzeros Variable types: 0 continuous, 761 integer (761 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 14 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (557 simplex iterations) in 0.03 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