current bounds on the number of colors: 0 -- 44 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:47 2012 Optimize a model with 10824 rows, 1458 columns and 33308 nonzeros Presolve time: 0.04s Presolved: 10824 rows, 1458 columns, 33308 nonzeros Variable types: 0 continuous, 1458 integer (1458 binary) Root relaxation: objective 0.000000e+00, 97 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 0.08 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 18:03:47 2012 Optimize a model with 5434 rows, 974 columns and 16654 nonzeros Presolve time: 0.02s Presolved: 5434 rows, 974 columns, 16654 nonzeros Variable types: 0 continuous, 974 integer (974 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 0.00000 0 20 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (944 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 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:03:48 2012 Optimize a model with 2494 rows, 710 columns and 7570 nonzeros Presolve time: 0.01s Presolved: 2494 rows, 710 columns, 7570 nonzeros Variable types: 0 continuous, 710 integer (710 binary) Root relaxation: objective 0.000000e+00, 90 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 64 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1913 simplex iterations) in 0.21 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 18:03:48 2012 Optimize a model with 3964 rows, 842 columns and 12112 nonzeros Presolve time: 0.01s Presolved: 3964 rows, 842 columns, 12112 nonzeros Variable types: 0 continuous, 842 integer (842 binary) Root relaxation: objective 0.000000e+00, 88 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 26 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 194 - 0.00000 - - 1s 0 0 0.00000 0 170 - 0.00000 - - 1s 0 0 0.00000 0 176 - 0.00000 - - 2s 0 0 0.00000 0 187 - 0.00000 - - 2s 0 0 0.00000 0 194 - 0.00000 - - 3s 0 0 0.00000 0 194 - 0.00000 - - 3s 0 2 0.00000 0 194 - 0.00000 - - 3s Cutting planes: Clique: 43 Zero half: 15 Explored 11 nodes (26056 simplex iterations) in 3.95 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 18:03:52 2012 Optimize a model with 4454 rows, 886 columns and 13626 nonzeros Presolve time: 0.01s Presolved: 4454 rows, 886 columns, 13626 nonzeros Variable types: 0 continuous, 886 integer (886 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 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 57 - 0.00000 - - 0s 0 0 0.00000 0 43 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 160 - 0.00000 - - 1s 0 0 0.00000 0 122 - 0.00000 - - 1s 0 0 0.00000 0 118 - 0.00000 - - 1s 0 0 0.00000 0 90 - 0.00000 - - 2s 0 0 0.00000 0 147 - 0.00000 - - 2s 0 0 0.00000 0 16 - 0.00000 - - 2s 0 0 0.00000 0 22 - 0.00000 - - 3s 0 0 0.00000 0 22 - 0.00000 - - 3s 0 2 0.00000 0 22 - 0.00000 - - 3s 102 4 infeasible 10 - 0.00000 - 89.5 5s * 145 3 7 0.0000000 0.00000 0.0% 94.1 5s Cutting planes: Clique: 26 Zero half: 3 Explored 146 nodes (41197 simplex iterations) in 5.38 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