protected ISet <Action> ActionsThatAreAlwaysEnabled(State source, Action action, IEnumerable <Action> actions,
CodeContractsRunner codeContractsRunner)
{
Contract.Requires(source != null);
Contract.Requires(action != null);
Contract.Requires(actions.Any());
Contract.Requires(codeContractsRunner != null);
var targetPreconditionQueries = queryGenerator.CreatePositiveQueries(source, action, actions);
generatedQueriesCount += targetPreconditionQueries.Count;
var queryAssembly = CreateQueryAssembly(targetPreconditionQueries);
var evaluator = new QueryEvaluator(codeContractsRunner, queryAssembly);
var enabledActions = new HashSet <Action>(evaluator.GetEnabledActions(targetPreconditionQueries));
unprovenQueriesCount += evaluator.UnprovenQueries;
return(enabledActions);
}
public ActionAnalysisResults AnalyzeActions(State source, Action action, IEnumerable <Action> actions)
{
var codeContractsRunner = new CodeContractsRunner(workingDir, ccCheckDefaultArgs, libPaths, typeToAnalyze);
if (action.IsPure)
{
return(new ActionAnalysisResults(new HashSet <Action>(source.EnabledActions), new HashSet <Action>(source.DisabledActions)));
}
var enabledActions = ActionsThatAreAlwaysEnabled(source, action, actions, codeContractsRunner);
var disabledActions = ActionsThatAreAlwaysDisabled(source, action, actions, codeContractsRunner);
if (enabledActions.Intersect(disabledActions).Any())
{
Logger.Log(LogLevel.Warn,
"Suspicious state! Only a state with a unsatisfiable invariant can lead to actions being enabled and disabled at the same time. It can also mean a bug in our code.");
return(new ActionAnalysisResults(new HashSet <Action>(source.EnabledActions), new HashSet <Action>(source.DisabledActions)));
}
return(new ActionAnalysisResults(enabledActions, disabledActions));
}