current bounds on the number of colors: 0 -- 129 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:16 2012 Optimize a model with 29121 rows, 8709 columns and 95232 nonzeros Presolve removed 1 rows and 64 columns Presolve time: 0.14s Presolved: 29120 rows, 8645 columns, 95168 nonzeros Variable types: 0 continuous, 8645 integer (8645 binary) Root relaxation: objective 0.000000e+00, 445 iterations, 0.02 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 (712 simplex iterations) in 0.20 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 -- 64 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:17 2012 Optimize a model with 14625 rows, 4581 columns and 47616 nonzeros Presolve removed 1 rows and 32 columns Presolve time: 0.07s Presolved: 14624 rows, 4549 columns, 47584 nonzeros Variable types: 0 continuous, 4549 integer (4549 binary) Root relaxation: objective 0.000000e+00, 399 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 (654 simplex iterations) in 0.10 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:17 2012 Optimize a model with 7377 rows, 2517 columns and 23808 nonzeros Presolve removed 1 rows and 16 columns Presolve time: 0.03s Presolved: 7376 rows, 2501 columns, 23792 nonzeros Variable types: 0 continuous, 2501 integer (2501 binary) Root relaxation: objective 0.000000e+00, 260 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 (479 simplex iterations) in 0.04 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:17 2012 Optimize a model with 3753 rows, 1485 columns and 11904 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.01s Presolved: 3752 rows, 1477 columns, 11896 nonzeros Variable types: 0 continuous, 1477 integer (1477 binary) Root relaxation: objective 0.000000e+00, 288 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 (503 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:17 2012 Optimize a model with 1941 rows, 969 columns and 5952 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.01s Presolved: 1940 rows, 965 columns, 5948 nonzeros Variable types: 0 continuous, 965 integer (965 binary) Root relaxation: objective 0.000000e+00, 302 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 0 137 - 0.00000 - - 0s 0 0 0.00000 0 161 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3601 simplex iterations) in 0.23 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:18 2012 Optimize a model with 1035 rows, 711 columns and 2976 nonzeros Presolve removed 129 rows and 130 columns Presolve time: 0.00s Presolved: 906 rows, 581 columns, 2718 nonzeros Variable types: 0 continuous, 581 integer (581 binary) Root relaxation: objective 0.000000e+00, 133 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 0 128 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (538 simplex iterations) in 0.01 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:34:18 2012 Optimize a model with 1488 rows, 840 columns and 4464 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1487 rows, 837 columns, 4461 nonzeros Variable types: 0 continuous, 837 integer (837 binary) Root relaxation: objective 0.000000e+00, 307 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 0 250 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 3 Zero half: 182 Explored 0 nodes (4150 simplex iterations) in 0.34 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4