Iteration final - SOLVER_EXECUTION
Sequence: 6
Timestamp: 2025-07-25 22:28:28

Prompt:
Generated solver codes with templates and executed them with retry logic

Response:
{
  "gurobipy": {
    "solver_type": "gurobipy",
    "execution_time": 0.167006254196167,
    "return_code": 0,
    "stdout": "Restricted license - for non-production use only - expires 2026-11-23\nGurobi Optimizer version 12.0.2 build v12.0.2rc0 (linux64 - \"Red Hat Enterprise Linux 9.4 (Plow)\")\n\nCPU model: AMD EPYC 7513 32-Core Processor, instruction set [SSE2|AVX|AVX2]\nThread count: 64 physical cores, 128 logical processors, using up to 32 threads\n\nOptimize a model with 7 rows, 9 columns and 19 nonzeros\nModel fingerprint: 0xcb0386e4\nVariable types: 0 continuous, 9 integer (9 binary)\nCoefficient statistics:\n  Matrix range     [1e+00, 4e+00]\n  Objective range  [3e+00, 4e+00]\n  Bounds range     [1e+00, 1e+00]\n  RHS range        [1e+00, 2e+04]\nPresolve removed 7 rows and 9 columns\nPresolve time: 0.00s\nPresolve: All rows and columns removed\n\nExplored 0 nodes (0 simplex iterations) in 0.00 seconds (0.00 work units)\nThread count was 1 (of 128 available processors)\n\nSolution count 1: 8.3 \n\nOptimal solution found (tolerance 1.00e-04)\nBest objective 8.300000000000e+00, best bound 8.300000000000e+00, gap 0.0000%\nOptimal value: 8.3\nStudent 1 assigned to Restaurant 1\nStudent 2 assigned to Restaurant 1\nStudent 3 assigned to Restaurant 1\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 8.3,
    "error_message": null,
    "decision_variables": {}
  },
  "docplex": {
    "solver_type": "docplex",
    "execution_time": 1.3614037036895752,
    "return_code": 0,
    "stdout": "Optimal value: 8.3\nStudent 1 assigned to Restaurant 1\nStudent 2 assigned to Restaurant 1\nStudent 3 assigned to Restaurant 1\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 8.3,
    "error_message": null,
    "decision_variables": {}
  },
  "pyomo": {
    "solver_type": "pyomo",
    "execution_time": 0.8354587554931641,
    "return_code": 0,
    "stdout": "Read LP format model from file /tmp/tmp4b45yqyr.pyomo.lp\nReading time = 0.00 seconds\nx1: 7 rows, 9 columns, 23 nonzeros\nSet parameter TimeLimit to value 300\nSet parameter MIPGap to value 0.01\nGurobi Optimizer version 12.0.2 build v12.0.2rc0 (linux64 - \"Red Hat Enterprise Linux 9.4 (Plow)\")\n\nCPU model: AMD EPYC 7513 32-Core Processor, instruction set [SSE2|AVX|AVX2]\nThread count: 64 physical cores, 128 logical processors, using up to 32 threads\n\nNon-default parameters:\nTimeLimit  300\nMIPGap  0.01\n\nOptimize a model with 7 rows, 9 columns and 23 nonzeros\nModel fingerprint: 0x9ef87954\nVariable types: 0 continuous, 9 integer (9 binary)\nCoefficient statistics:\n  Matrix range     [1e+00, 5e+00]\n  Objective range  [2e+00, 5e+00]\n  Bounds range     [1e+00, 1e+00]\n  RHS range        [1e+00, 2e+04]\nFound heuristic solution: objective -0.0000000\nPresolve removed 7 rows and 9 columns\nPresolve time: 0.00s\nPresolve: All rows and columns removed\n\nExplored 0 nodes (0 simplex iterations) in 0.00 seconds (0.00 work units)\nThread count was 1 (of 128 available processors)\n\nSolution count 2: 13.3 -0 \n\nOptimal solution found (tolerance 1.00e-02)\nBest objective 1.330000000000e+01, best bound 1.330000000000e+01, gap 0.0000%\nOptimal solution found!\nOptimal value: 13.3\n\nVariable values:\nStudent 1 assigned to Restaurant 1\nStudent 2 assigned to Restaurant 1\nStudent 3 assigned to Restaurant 3\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 13.3,
    "error_message": null,
    "decision_variables": {}
  }
}
