public IEnumerable <ProofState> Search(ProofState state, ErrorReporterDelegate er)
{
Contract.Requires <ArgumentNullException>(state != null, "rootState");
IEnumerable <ProofState> enumerable;
switch (ActiveStrategy)
{
case Strategy.Bfs:
enumerable = BreadthFirstSeach.Search(state, er);
break;
case Strategy.Dfs:
enumerable = DepthFirstSeach.Search(state, er);
break;
case Strategy.Undefined:
throw new tcce.UnreachableException();
default:
enumerable = DepthFirstSeach.Search(state, er);
break;
}
return(enumerable);
}
protected override void Execute(IntPtr bridgeFunc, IProgressMonitor subMonitor)
{
using (subMonitor.BeginTask("Exploring " + File.Name, 100))
{
BoostTestExploreDelegate bridge =
(BoostTestExploreDelegate)Marshal.GetDelegateForFunctionPointer(
bridgeFunc,
typeof(BoostTestExploreDelegate)
);
VisitorDelegate visitTestCase = new VisitorDelegate(VisitTestCase);
VisitorDelegate beginVisitTestSuite = new VisitorDelegate(BeginVisitTestSuite);
VisitorDelegate endVisitTestSuite = new VisitorDelegate(EndVisitTestSuite);
ErrorReporterDelegate errorReporter =
new ErrorReporterDelegate((text) => Logger.Log(LogSeverity.Error, text));
bridge(
File.FullName,
visitTestCase,
beginVisitTestSuite,
endVisitTestSuite,
errorReporter
);
TestModelSerializer.PublishTestModel(TestModel, MessageSink);
}
}
/// <summary>
///
/// </summary>
/// <param name="program"></param>
/// <param name="target"></param>
/// <param name="erd"></param>
/// only used this to report error, local errors which are genereaed during searching should not use this
/// <param name="r"></param>
/// <returns></returns>
public static MemberDecl FindAndApplyTactic(Program program, MemberDecl target, ErrorReporterDelegate erd, Resolver r = null)
{
Contract.Requires(program != null);
Contract.Requires(target != null);
Stopwatch watch = new Stopwatch();
watch.Start();
_i = new Interpreter(program);
_errorReporterDelegate = erd;
var result = _i.EvalTacticApplication(target, r);
var p = new Printer(Console.Out);
p.PrintMembers(new List <MemberDecl>()
{
result
}, 0, "");
watch.Stop();
Console.WriteLine("Time Used: " + watch.Elapsed.TotalSeconds.ToString());
_errorReporterDelegate = null;
return(result);
}
public static MemberDecl ApplyTacticInMethod(Program program, MemberDecl target, ErrorReporterDelegate erd,
Resolver r = null, Program raw = null)
{
Contract.Requires(program != null);
Contract.Requires(target != null);
Stopwatch watch = new Stopwatch();
watch.Start();
_driver = new TacnyDriver(program, erd);
// backup datatype info, as this will be reset by the internal resolving process in tacny.
// this contains datatype obj instance for comparing types
Type.BackupScopes();
var result = _driver.InterpretAndUnfoldTactic(target, r);
Type.RestoreScopes();
var p = new Printer(Console.Out);
p.PrintMembers(new List <MemberDecl>()
{
result
}, 0, "");
watch.Stop();
Console.WriteLine("Time Used: " + watch.Elapsed.TotalSeconds);
_errorReporterDelegate = null;
return(result);
}
public T Parse(string[] arguments, ErrorReporterDelegate errorReporter)
{
HasErrors = false;
_errorReporter = errorReporter;
_argumentsFromOutside = arguments ?? throw new ArgumentNullException(nameof(arguments), "Parameter(s) must be provided!");
_parsedArgumentPoco = Activator.CreateInstance <T>();
if (arguments.Length == 0)
{
return(_parsedArgumentPoco);
}
DetectPossibleArguments();
ParseArgumentList();
MapArgumentListToObject();
SetDefaultValuesForUnseenFields();
CheckForErrors();
return(_parsedArgumentPoco);
}
internal static VerifyResult VerifyState(ProofState state, ErrorReporterDelegate er) {
if (_proofList == null)
_proofList = new List<ProofState>();
if (_proofList.Count + 1 < SolutionCounter) {
_proofList.Add(state);
return VerifyResult.Cached;
} else {
_proofList.Add(state);
var bodyList = new Dictionary<ProofState, BlockStmt>();
foreach (var proofState in _proofList) {
bodyList.Add(proofState, Util.InsertCode(proofState,
new Dictionary<UpdateStmt, List<Statement>>() {
{proofState.TacticApplication, proofState.GetGeneratedCode()}
}));
}
var memberList = Util.GenerateMembers(state, bodyList);
var prog = Util.GenerateDafnyProgram(state, memberList.Values.ToList());
var result = Util.ResolveAndVerify(prog, errorInfo => { er?.Invoke(new CompoundErrorInformation(errorInfo.Tok, errorInfo.Msg, errorInfo, state)); });
if (result.Count == 0)
return VerifyResult.Verified;
else {
//TODO: find which proof state verified (if any)
//TODO: update verification results
// er();
return VerifyResult.Failed;
}
}
}
public static VerifyResult VerifyState(ProofState state, ErrorReporterDelegate er) {
// at the momemnt,we don't propagate errors from buanches to user, no need to use er, in the future this will
// come to play when repair kicks in
var prog = Util.GenerateResolvedProg(state);
if (prog == null)
return VerifyResult.Unresolved;
// ErrorReporterDelegate tmp_er =
// errorInfo => { er?.Invoke(new CompoundErrorInformation(errorInfo.Tok, errorInfo.Msg, errorInfo, state)); };
var result = Util.VerifyResolvedProg(prog, null);
/*
ErrorReporterDelegate tmp_er =
errorInfo => { er?.Invoke(new CompoundErrorInformation(errorInfo.Tok, errorInfo.Msg, errorInfo, state)); };
var boogieProg = Util.Translate(prog, prog.Name, tmp_er);
PipelineStatistics stats;
List<ErrorInformation> errorList;
//Console.WriteLine("call verifier in Tacny !!!");
PipelineOutcome tmp = Util.BoogiePipeline(boogieProg,
new List<string> { prog.Name }, prog.Name, tmp_er,
out stats, out errorList, prog);
*/
if(result)
return VerifyResult.Verified;
else {
return VerifyResult.Failed;
}
}
private TacnyDriver(Program program, ErrorReporterDelegate erd)
{
Contract.Requires(Tcce.NonNull(program));
// initialize state
GetTimer().Restart();
_state = new ProofState(program);
_errorReporterDelegate = erd;
_branches = new List <IEnumerable <ProofState> >();
_tacticCalls = 0;
}
public static List<Statement> FindSingleTactic(Program program, MemberDecl target,
UpdateStmt chosenTacticCall, ErrorReporterDelegate erd, Program unresolvedProgram)
{
Contract.Requires(program != null);
Contract.Requires(target != null);
var i = new Interpreter(program, unresolvedProgram);
_errorReporterDelegate = erd;
var list = i.FindSingleTacticApplication(target, chosenTacticCall);
_errorReporterDelegate = null;
return list;
}
public static bool Verify(Program dafnyProgram, ResolverTagger resolver, string uniqueIdPrefix, string requestId, ErrorReporterDelegate er, Program unresolvedProgram)
{
var translator = new Translator(dafnyProgram.reporter, er)
{
InsertChecksums = true,
UniqueIdPrefix = uniqueIdPrefix
};
var boogieProgram = translator.Translate(dafnyProgram, unresolvedProgram);
resolver.ReInitializeVerificationErrors(requestId, boogieProgram.Implementations);
var outcome = BoogiePipeline(boogieProgram, 1 < CommandLineOptions.Clo.VerifySnapshots ? uniqueIdPrefix : null, requestId, er);
return outcome == PipelineOutcome.Done || outcome == PipelineOutcome.VerificationCompleted;
}
public static List <Statement> FindSingleTactic(Program program, MemberDecl target,
UpdateStmt chosenTacticCall, ErrorReporterDelegate erd, Program unresolvedProgram)
{
Contract.Requires(program != null);
Contract.Requires(target != null);
var i = new Interpreter(program, unresolvedProgram);
_errorReporterDelegate = erd;
var list = i.FindSingleTacticApplication(target, chosenTacticCall);
_errorReporterDelegate = null;
return(list);
}
public static void VerifyResolvedProg(ProofState state, Program program,
List <TacnyInterpreter.VerifyResult> res, List <int> idx,
ErrorReporterDelegate er)
{
Contract.Requires <ArgumentNullException>(program != null);
#if _TACTIC_DEBUG_L1
var printer = new Printer(Console.Out);
Console.WriteLine("*********************Verifying Tactic Generated Prog*****************");
printer.PrintProgram(program, true);
Console.WriteLine("\n*********************Prog END*****************");
#endif
_verificationCount++;
Console.WriteLine("Verfication Count: " + _verificationCount);
IEnumerable <Tuple <string, Bpl.Program> > boogieProg;
// try {
boogieProg = Translator.Translate(program, program.reporter, null);
foreach (var prog in boogieProg)
{
PipelineStatistics stats;
List <ErrorInformation> errorList;
PipelineOutcome tmp = BoogiePipeline(prog.Item2,
new List <string> {
program.Name
}, program.Name, er,
out stats, out errorList, program);
var curIdx = -1;
for (var i = 0; i < errorList.Count; i++)
{
var err = errorList[i];
if (err.Tok.line < TacnyDriver.TacticCodeTokLine)
{
curIdx = 0 - err.Tok.line - 2;
res[idx[curIdx]] = TacnyInterpreter.VerifyResult.Failed;
}
}
}
/* } catch {
* Console.WriteLine("execption: set verify result as failed.");
* for(var i = 0; i < res.Count; i++) {
* res[i] = TacnyInterpreter.VerifyResult.Failed;
* }
* }*/
}
public IEnumerable<ProofState> Search(ProofState state, ErrorReporterDelegate er) {
Contract.Requires<ArgumentNullException>(state != null, "rootState");
switch (ActiveStrategy) {
case Strategy.Bfs:
return BreadthFirstSeach.Search(state, er);
case Strategy.Dfs:
return DepthFirstSeach.Search(state);
case Strategy.Undefined:
throw new tcce.UnreachableException();
default:
return BreadthFirstSeach.Search(state, er);
}
}
public static MemberDecl FindAndApplyTactic(Program program, MemberDecl target, ErrorReporterDelegate erd, Program unresolvedProgram = null) {
Contract.Requires(program != null);
Contract.Requires(target != null);
// TODO Re-Enable with more permanent solution
// Currently, if the interpreter is the same, static across calls, each time the interpreter is
// needed, it will just re-use the previous proof states, frames etc. Which will likely cause
// problems in the extension, where it is called many times consecutively.
//if (_i == null) {
_i = new Interpreter(program, unresolvedProgram);
//}
_errorReporterDelegate = erd;
var result = _i.FindTacticApplication(target);
_errorReporterDelegate = null;
return result;
}
public static bool VerifyResolvedProg(Program program, ErrorReporterDelegate er)
{
Contract.Requires <ArgumentNullException>(program != null);
var boogieProg = Translate(program, program.Name, er);
PipelineStatistics stats;
List <ErrorInformation> errorList;
//Console.WriteLine("call verifier in Tacny !!!");
PipelineOutcome tmp = BoogiePipeline(boogieProg,
new List <string> {
program.Name
}, program.Name, er,
out stats, out errorList, program);
return(errorList.Count == 0);
}
public static MemberDecl FindAndApplyTactic(Program program, MemberDecl target, ErrorReporterDelegate erd, Program unresolvedProgram = null)
{
Contract.Requires(program != null);
Contract.Requires(target != null);
// TODO Re-Enable with more permanent solution
// Currently, if the interpreter is the same, static across calls, each time the interpreter is
// needed, it will just re-use the previous proof states, frames etc. Which will likely cause
// problems in the extension, where it is called many times consecutively.
//if (_i == null) {
_i = new Interpreter(program, unresolvedProgram);
//}
_errorReporterDelegate = erd;
var result = _i.FindTacticApplication(target);
_errorReporterDelegate = null;
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="program"></param>
/// <param name="target"></param>
/// <param name="erd"></param>
/// only used this to report error, local errors which are genereaed during searching should not use this
/// <param name="r"></param>
/// <returns></returns>
public static MemberDecl FindAndApplyTactic(Program program, MemberDecl target, ErrorReporterDelegate erd, Resolver r = null) {
Contract.Requires(program != null);
Contract.Requires(target != null);
Stopwatch watch = new Stopwatch();
watch.Start();
_i = new Interpreter(program);
_errorReporterDelegate = erd;
var result = _i.EvalTacticApplication(target, r);
var p = new Printer(Console.Out);
p.PrintMembers(new List<MemberDecl>() { result }, 0, "");
watch.Stop();
Console.WriteLine("Time Used: " + watch.Elapsed.TotalSeconds.ToString());
_errorReporterDelegate = null;
return result;
}
internal static VerifyResult VerifyState(ProofState state, ErrorReporterDelegate er)
{
if (_proofList == null)
{
_proofList = new List <ProofState>();
}
if (_proofList.Count + 1 < SolutionCounter)
{
_proofList.Add(state);
return(VerifyResult.Cached);
}
else
{
_proofList.Add(state);
var bodyList = new Dictionary <ProofState, BlockStmt>();
foreach (var proofState in _proofList)
{
bodyList.Add(proofState, Util.InsertCode(proofState,
new Dictionary <UpdateStmt, List <Statement> >()
{
{ proofState.TacticApplication, proofState.GetGeneratedCode() }
}));
}
var memberList = Util.GenerateMembers(state, bodyList);
var prog = Util.GenerateDafnyProgram(state, memberList.Values.ToList());
var result = Util.ResolveAndVerify(prog, errorInfo => { er?.Invoke(new CompoundErrorInformation(errorInfo.Tok, errorInfo.Msg, errorInfo, state)); });
if (result.Count == 0)
{
return(VerifyResult.Verified);
}
else
{
//TODO: find which proof state verified (if any)
//TODO: update verification results
// er();
return(VerifyResult.Failed);
}
}
}
public static VerifyResult VerifyState(ProofState state, ErrorReporterDelegate er)
{
// at the momemnt,we don't propagate errors from buanches to user, no need to use er, in the future this will
// come to play when repair kicks in
var prog = Util.GenerateResolvedProg(state);
if (prog == null)
{
return(VerifyResult.Unresolved);
}
// ErrorReporterDelegate tmp_er =
// errorInfo => { er?.Invoke(new CompoundErrorInformation(errorInfo.Tok, errorInfo.Msg, errorInfo, state)); };
var result = Util.VerifyResolvedProg(prog, null);
/*
* ErrorReporterDelegate tmp_er =
* errorInfo => { er?.Invoke(new CompoundErrorInformation(errorInfo.Tok, errorInfo.Msg, errorInfo, state)); };
* var boogieProg = Util.Translate(prog, prog.Name, tmp_er);
* PipelineStatistics stats;
* List<ErrorInformation> errorList;
*
* //Console.WriteLine("call verifier in Tacny !!!");
* PipelineOutcome tmp = Util.BoogiePipeline(boogieProg,
* new List<string> { prog.Name }, prog.Name, tmp_er,
* out stats, out errorList, prog);
*/
if (result)
{
return(VerifyResult.Verified);
}
else
{
return(VerifyResult.Failed);
}
}
private static void ReportOutcome(VC.VCGen.Outcome outcome, ErrorReporterDelegate er, string implName, IToken implTok, string requestId, TextWriter tw, int timeLimit, List<Counterexample> errors)
{
ErrorInformation errorInfo = null;
switch (outcome)
{
case VCGen.Outcome.ReachedBound:
tw.WriteLine(string.Format("Stratified Inlining: Reached recursion bound of {0}", CommandLineOptions.Clo.RecursionBound));
break;
case VCGen.Outcome.TimedOut:
if (implName != null && implTok != null)
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, string.Format("Verification timed out after {0} seconds ({1})", timeLimit, implName), requestId);
// Report timed out assertions as auxiliary info.
if (errors != null)
{
var cmpr = new CounterexampleComparer();
var timedOutAssertions = errors.Where(e => e.IsAuxiliaryCexForDiagnosingTimeouts).Distinct(cmpr).ToList();
timedOutAssertions.Sort(cmpr);
int idx = 1;
foreach (Counterexample error in timedOutAssertions)
{
var callError = error as CallCounterexample;
var returnError = error as ReturnCounterexample;
var assertError = error as AssertCounterexample;
IToken tok = null;
if (callError != null)
{
tok = callError.FailingCall.tok;
}
else if (returnError != null)
{
tok = returnError.FailingReturn.tok;
}
else
{
tok = assertError.FailingAssert.tok;
}
errorInfo.AddAuxInfo(tok, string.Format("unverified assertion due to timeout ({0} of {1})", idx++, timedOutAssertions.Count));
}
}
}
break;
case VCGen.Outcome.OutOfMemory:
if (implName != null && implTok != null)
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, "Verification out of memory (" + implName + ")", requestId);
}
break;
case VCGen.Outcome.Inconclusive:
if (implName != null && implTok != null)
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, "Verification inconclusive (" + implName + ")", requestId);
}
break;
}
if (errorInfo != null)
{
errorInfo.ImplementationName = implName;
if (er != null)
{
lock (er)
{
er(errorInfo);
}
}
}
}
private static void ProcessErrors(List<Counterexample> errors, VC.VCGen.Outcome outcome, TextWriter tw, ErrorReporterDelegate er, Implementation impl = null)
{
var implName = impl != null ? impl.Name : null;
if (errors != null)
{
errors.Sort(new CounterexampleComparer());
foreach (Counterexample error in errors)
{
if (error.IsAuxiliaryCexForDiagnosingTimeouts)
{
continue;
}
var errorInfo = CreateErrorInformation(error, outcome);
errorInfo.ImplementationName = implName;
if (CommandLineOptions.Clo.XmlSink != null)
{
WriteErrorInformationToXmlSink(errorInfo, error.Trace);
}
if (CommandLineOptions.Clo.EnhancedErrorMessages == 1)
{
foreach (string info in error.relatedInformation)
{
Contract.Assert(info != null);
errorInfo.Out.WriteLine(" " + info);
}
}
if (CommandLineOptions.Clo.ErrorTrace > 0)
{
errorInfo.Out.WriteLine("Execution trace:");
error.Print(4, errorInfo.Out, b => { errorInfo.AddAuxInfo(b.tok, b.Label, "Execution trace"); });
}
if (CommandLineOptions.Clo.ModelViewFile != null)
{
error.PrintModel(errorInfo.Model);
}
printer.WriteErrorInformation(errorInfo, tw);
if (er != null)
{
lock (er)
{
er(errorInfo);
}
}
}
}
}
public IEnumerable<ProofState> Search(ProofState state, ErrorReporterDelegate er) {
Contract.Requires(state != null);
return default(IEnumerable<ProofState>);
}
internal new static IEnumerable<ProofState> Search(ProofState rootState, ErrorReporterDelegate er){
var queue = new Queue<IEnumerator<ProofState>>();
queue.Enqueue(Interpreter.EvalStep(rootState).GetEnumerator());
IEnumerator<ProofState> enumerator = Enumerable.Empty<ProofState>().GetEnumerator();
while (queue.Count > 0){
// check if there is any more item in the enumerartor, if so, MoveNext will move to the next item
if (!enumerator.MoveNext()){
// if no item in the current enumerator, pop a new enumerator from the queie,
enumerator = queue.Dequeue();
// set the start point for enumulator, if there is no valid start point, i.e. empty, skip this one
if (!enumerator.MoveNext())
continue;
}
var proofState = enumerator.Current;
//check if any new added code reuqires to call the dafny to verity, or reach the last line of code
if (proofState.IfVerify || proofState.IsEvaluated()) {
proofState.IfVerify = false;
switch (VerifyState(proofState, er)){
case VerifyResult.Verified:
proofState.MarkCurFrameAsTerminated(true);
if (proofState.IsTerminated()){
yield return proofState;
yield break;
}
//queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
break;
case VerifyResult.Failed:
if (proofState.IsEvaluated()){
proofState.MarkCurFrameAsTerminated(false);
if(proofState.IsTerminated()) {
yield return proofState;
yield break;
}
}
break;
case VerifyResult.Unresolved:
//discharge current branch if fails to resolve
continue;
default:
throw new ArgumentOutOfRangeException();
}
}
/*
* when failed, check if this mmethod is evaluated , i.e. all tstmt are evalauted,
* if so, dischard this branch and continue with the next one
* otherwise, continue to evaluate the next stmt
*/
if(!proofState.IsEvaluated()) {
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
}
}
private static void ReportOutcome(VC.VCGen.Outcome outcome, ErrorReporterDelegate er, string implName, IToken implTok, string requestId, TextWriter tw, int timeLimit)
{
ErrorInformation errorInfo = null;
switch (outcome)
{
case VCGen.Outcome.ReachedBound:
tw.WriteLine(string.Format("Stratified Inlining: Reached recursion bound of {0}", CommandLineOptions.Clo.RecursionBound));
break;
case VCGen.Outcome.TimedOut:
if (implName != null && implTok != null)
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, string.Format("Verification timed out after {0} seconds ({1})", timeLimit, implName), requestId);
}
break;
case VCGen.Outcome.OutOfMemory:
if (implName != null && implTok != null)
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, "Verification out of memory (" + implName + ")", requestId);
}
break;
case VCGen.Outcome.Inconclusive:
if (implName != null && implTok != null)
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, "Verification inconclusive (" + implName + ")", requestId);
}
break;
}
if (errorInfo != null)
{
errorInfo.ImplementationName = implName;
if (er != null)
{
lock (er)
{
er(errorInfo);
}
}
}
}
private static PipelineOutcome RunStagedHoudini(Program program, PipelineStatistics stats, ErrorReporterDelegate er)
{
Houdini.HoudiniSession.HoudiniStatistics houdiniStats = new Houdini.HoudiniSession.HoudiniStatistics();
Houdini.StagedHoudini stagedHoudini = new Houdini.StagedHoudini(program, houdiniStats, ProgramFromFile);
Houdini.HoudiniOutcome outcome = stagedHoudini.PerformStagedHoudiniInference();
if (CommandLineOptions.Clo.PrintAssignment)
{
Console.WriteLine("Assignment computed by Houdini:");
foreach (var x in outcome.assignment)
{
Console.WriteLine(x.Key + " = " + x.Value);
}
}
if (CommandLineOptions.Clo.Trace)
{
int numTrueAssigns = 0;
foreach (var x in outcome.assignment)
{
if (x.Value)
numTrueAssigns++;
}
Console.WriteLine("Number of true assignments = " + numTrueAssigns);
Console.WriteLine("Number of false assignments = " + (outcome.assignment.Count - numTrueAssigns));
Console.WriteLine("Prover time = " + houdiniStats.proverTime.ToString("F2"));
Console.WriteLine("Unsat core prover time = " + houdiniStats.unsatCoreProverTime.ToString("F2"));
Console.WriteLine("Number of prover queries = " + houdiniStats.numProverQueries);
Console.WriteLine("Number of unsat core prover queries = " + houdiniStats.numUnsatCoreProverQueries);
Console.WriteLine("Number of unsat core prunings = " + houdiniStats.numUnsatCorePrunings);
}
foreach (Houdini.VCGenOutcome x in outcome.implementationOutcomes.Values)
{
ProcessOutcome(x.outcome, x.errors, "", stats, Console.Out, CommandLineOptions.Clo.ProverKillTime, er);
ProcessErrors(x.errors, x.outcome, Console.Out, er);
}
return PipelineOutcome.Done;
}
public static bool Verify(Dafny.Program dafnyProgram, ResolverTagger resolver, string uniqueIdPrefix, string requestId, ErrorReporterDelegate er) {
Dafny.Translator translator = new Dafny.Translator();
translator.InsertChecksums = true;
translator.UniqueIdPrefix = uniqueIdPrefix;
Bpl.Program boogieProgram = translator.Translate(dafnyProgram);
resolver.ReInitializeVerificationErrors(requestId, boogieProgram.Implementations);
// TODO(wuestholz): Maybe we should use a fixed program ID to limit the memory overhead due to the program cache in Boogie.
PipelineOutcome oc = BoogiePipeline(boogieProgram, 1 < Dafny.DafnyOptions.Clo.VerifySnapshots ? uniqueIdPrefix : null, requestId, er);
switch (oc) {
case PipelineOutcome.Done:
case PipelineOutcome.VerificationCompleted:
// TODO: This would be the place to proceed to compile the program, if desired
return true;
case PipelineOutcome.FatalError:
default:
return false;
}
}
public static bool Verify(Dafny.Program dafnyProgram, ResolverTagger resolver, string uniqueIdPrefix, string requestId, ErrorReporterDelegate er)
{
Dafny.Translator translator = new Dafny.Translator(dafnyProgram.reporter);
var translatorFlags = new Dafny.Translator.TranslatorFlags() { InsertChecksums = true, UniqueIdPrefix = uniqueIdPrefix };
var boogiePrograms = Dafny.Translator.Translate(dafnyProgram, dafnyProgram.reporter, translatorFlags);
var impls = boogiePrograms.SelectMany(p => p.Item2.Implementations);
resolver.ReInitializeVerificationErrors(requestId, impls);
bool success = false;
foreach (var kv in boogiePrograms) {
var boogieProgram = kv.Item2;
// TODO(wuestholz): Maybe we should use a fixed program ID to limit the memory overhead due to the program cache in Boogie.
PipelineOutcome oc = BoogiePipeline(boogieProgram, 1 < Dafny.DafnyOptions.Clo.VerifySnapshots ? uniqueIdPrefix : null, requestId, er);
switch (oc) {
case PipelineOutcome.Done:
case PipelineOutcome.VerificationCompleted:
// TODO: This would be the place to proceed to compile the program, if desired
success = true;
break;
case PipelineOutcome.FatalError:
default:
return false;
}
}
return success;
}
/// <summary>
/// Resolve, type check, infer invariants for, and verify the given Boogie program.
/// The intention is that this Boogie program has been produced by translation from something
/// else. Hence, any resolution errors and type checking errors are due to errors in
/// the translation.
/// </summary>
static PipelineOutcome BoogiePipeline(Bpl.Program/*!*/ program, string programId, string requestId, ErrorReporterDelegate er)
{
Contract.Requires(program != null);
PipelineOutcome oc = BoogieResolveAndTypecheck(program);
if (oc == PipelineOutcome.ResolvedAndTypeChecked) {
ExecutionEngine.EliminateDeadVariables(program);
ExecutionEngine.CollectModSets(program);
ExecutionEngine.CoalesceBlocks(program);
ExecutionEngine.Inline(program);
return ExecutionEngine.InferAndVerify(program, new PipelineStatistics(), programId, er, requestId);
}
return oc;
}
public static bool Verify(Dafny.Program dafnyProgram, ResolverTagger resolver, string uniqueIdPrefix, string requestId, ErrorReporterDelegate er)
{
Dafny.Translator translator = new Dafny.Translator();
translator.InsertChecksums = true;
translator.UniqueIdPrefix = uniqueIdPrefix;
Bpl.Program boogieProgram = translator.Translate(dafnyProgram);
resolver.ReInitializeVerificationErrors(requestId, boogieProgram.Implementations);
// TODO(wuestholz): Maybe we should use a fixed program ID to limit the memory overhead due to the program cache in Boogie.
PipelineOutcome oc = BoogiePipeline(boogieProgram, 1 < Dafny.DafnyOptions.Clo.VerifySnapshots ? uniqueIdPrefix : null, requestId, er);
switch (oc)
{
case PipelineOutcome.Done:
case PipelineOutcome.VerificationCompleted:
// TODO: This would be the place to proceed to compile the program, if desired
return(true);
case PipelineOutcome.FatalError:
default:
return(false);
}
}
internal new static IEnumerable<ProofState> Search(ProofState rootState, ErrorReporterDelegate er) {
var queue = new Queue<IEnumerator<ProofState>>();
queue.Enqueue(Interpreter.EvalStep(rootState).GetEnumerator());
while (queue.Count > 0) {
// remove first enumerator on the queue
var enumerator = queue.Dequeue();
// if all the statements have been resolve skip
if (!enumerator.MoveNext())
continue;
var proofState = enumerator.Current;
queue.Enqueue(enumerator);
if (Verify) {
if (proofState.IsEvaluated() || proofState.IsPartiallyEvaluated()) {
switch (VerifyState(proofState, er)) {
case VerifyResult.Cached:
if (proofState.IsPartiallyEvaluated()) {
yield return proofState;
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
continue;
case VerifyResult.Verified:
yield return proofState;
yield break;
case VerifyResult.Failed:
/*
* verification failed, but the evaluation is partial return
* but continue evaluating the proofState
*/
if (proofState.IsPartiallyEvaluated()) {
yield return proofState;
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
continue;
default:
throw new ArgumentOutOfRangeException();
}
}
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
} else {
if (!(proofState.IsEvaluated() || proofState.IsPartiallyEvaluated()))
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
else {
yield return proofState;
if (proofState.IsPartiallyEvaluated()) {
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
}
}
}
}
/// <summary>
/// Given a resolved and type checked Boogie program, infers invariants for the program
/// and then attempts to verify it. Returns:
/// - Done if command line specified no verification
/// - FatalError if a fatal error occurred, in which case an error has been printed to console
/// - VerificationCompleted if inference and verification completed, in which the out
/// parameters contain meaningful values
/// </summary>
public static PipelineOutcome InferAndVerify(Program program,
PipelineStatistics stats,
string programId = null,
ErrorReporterDelegate er = null, string requestId = null)
{
Contract.Requires(program != null);
Contract.Requires(stats != null);
Contract.Ensures(0 <= Contract.ValueAtReturn(out stats.InconclusiveCount) && 0 <= Contract.ValueAtReturn(out stats.TimeoutCount));
if (requestId == null)
{
requestId = FreshRequestId();
}
var start = DateTime.UtcNow;
#region Do some pre-abstract-interpretation preprocessing on the program
// Doing lambda expansion before abstract interpretation means that the abstract interpreter
// never needs to see any lambda expressions. (On the other hand, if it were useful for it
// to see lambdas, then it would be better to more lambda expansion until after infererence.)
if (CommandLineOptions.Clo.ExpandLambdas) {
LambdaHelper.ExpandLambdas(program);
//PrintBplFile ("-", program, true);
}
#endregion
#region Infer invariants using Abstract Interpretation
// Always use (at least) intervals, if not specified otherwise (e.g. with the "/noinfer" switch)
if (CommandLineOptions.Clo.UseAbstractInterpretation)
{
if (!CommandLineOptions.Clo.Ai.J_Intervals && !CommandLineOptions.Clo.Ai.J_Trivial)
{
// use /infer:j as the default
CommandLineOptions.Clo.Ai.J_Intervals = true;
}
}
Microsoft.Boogie.AbstractInterpretation.NativeAbstractInterpretation.RunAbstractInterpretation(program);
#endregion
#region Do some post-abstract-interpretation preprocessing on the program (e.g., loop unrolling)
if (CommandLineOptions.Clo.LoopUnrollCount != -1)
{
program.UnrollLoops(CommandLineOptions.Clo.LoopUnrollCount, CommandLineOptions.Clo.SoundLoopUnrolling);
}
Dictionary<string, Dictionary<string, Block>> extractLoopMappingInfo = null;
if (CommandLineOptions.Clo.ExtractLoops)
{
extractLoopMappingInfo = program.ExtractLoops();
}
if (CommandLineOptions.Clo.PrintInstrumented)
{
program.Emit(new TokenTextWriter(Console.Out, CommandLineOptions.Clo.PrettyPrint));
}
#endregion
if (!CommandLineOptions.Clo.Verify)
{
return PipelineOutcome.Done;
}
#region Run Houdini and verify
if (CommandLineOptions.Clo.ContractInfer)
{
return RunHoudini(program, stats, er);
}
#endregion
#region Select and prioritize implementations that should be verified
var impls = program.Implementations.Where(
impl => impl != null && CommandLineOptions.Clo.UserWantsToCheckRoutine(cce.NonNull(impl.Name)) && !impl.SkipVerification);
// operate on a stable copy, in case it gets updated while we're running
Implementation[] stablePrioritizedImpls = null;
if (0 < CommandLineOptions.Clo.VerifySnapshots)
{
OtherDefinitionAxiomsCollector.Collect(program.Axioms);
DependencyCollector.Collect(program);
stablePrioritizedImpls = impls.OrderByDescending(
impl => impl.Priority != 1 ? impl.Priority : Cache.VerificationPriority(impl)).ToArray();
}
else
{
stablePrioritizedImpls = impls.OrderByDescending(impl => impl.Priority).ToArray();
}
#endregion
if (1 < CommandLineOptions.Clo.VerifySnapshots)
{
CachedVerificationResultInjector.Inject(program, stablePrioritizedImpls, requestId, programId, out stats.CachingActionCounts);
}
#region Verify each implementation
var outputCollector = new OutputCollector(stablePrioritizedImpls);
var outcome = PipelineOutcome.VerificationCompleted;
try
{
var cts = new CancellationTokenSource();
RequestIdToCancellationTokenSource.AddOrUpdate(requestId, cts, (k, ov) => cts);
var tasks = new Task[stablePrioritizedImpls.Length];
// We use this semaphore to limit the number of tasks that are currently executing.
var semaphore = new SemaphoreSlim(CommandLineOptions.Clo.VcsCores);
// Create a task per implementation.
for (int i = 0; i < stablePrioritizedImpls.Length; i++)
{
var taskIndex = i;
var id = stablePrioritizedImpls[taskIndex].Id;
CancellationTokenSource old;
if (ImplIdToCancellationTokenSource.TryGetValue(id, out old))
{
old.Cancel();
}
ImplIdToCancellationTokenSource.AddOrUpdate(id, cts, (k, ov) => cts);
var t = new Task((dummy) =>
{
try
{
if (outcome == PipelineOutcome.FatalError)
{
return;
}
if (cts.Token.IsCancellationRequested)
{
cts.Token.ThrowIfCancellationRequested();
}
VerifyImplementation(program, stats, er, requestId, extractLoopMappingInfo, stablePrioritizedImpls, taskIndex, outputCollector, Checkers, programId);
ImplIdToCancellationTokenSource.TryRemove(id, out old);
}
finally
{
semaphore.Release();
}
}, cts.Token, TaskCreationOptions.None);
tasks[taskIndex] = t;
}
// Execute the tasks.
int j = 0;
for (; j < stablePrioritizedImpls.Length && outcome != PipelineOutcome.FatalError; j++)
{
try
{
semaphore.Wait(cts.Token);
}
catch (OperationCanceledException)
{
break;
}
tasks[j].Start(TaskScheduler.Default);
}
// Don't wait for tasks that haven't been started yet.
tasks = tasks.Take(j).ToArray();
Task.WaitAll(tasks);
}
catch (AggregateException ae)
{
ae.Handle(e =>
{
var pe = e as ProverException;
if (pe != null)
{
printer.ErrorWriteLine(Console.Out, "Fatal Error: ProverException: {0}", e);
outcome = PipelineOutcome.FatalError;
return true;
}
var oce = e as OperationCanceledException;
if (oce != null)
{
return true;
}
return false;
});
}
finally
{
CleanupCheckers(requestId);
}
cce.NonNull(CommandLineOptions.Clo.TheProverFactory).Close();
outputCollector.WriteMoreOutput();
if (1 < CommandLineOptions.Clo.VerifySnapshots && programId != null)
{
program.FreezeTopLevelDeclarations();
programCache.Set(programId, program, policy);
}
if (0 <= CommandLineOptions.Clo.VerifySnapshots && CommandLineOptions.Clo.TraceCachingForBenchmarking)
{
var end = DateTime.UtcNow;
if (TimePerRequest.Count == 0)
{
FirstRequestStart = start;
}
TimePerRequest[requestId] = end.Subtract(start);
StatisticsPerRequest[requestId] = stats;
var printTimes = true;
Console.Out.WriteLine(CachedVerificationResultInjector.Statistics.Output(printTimes));
Console.Out.WriteLine("Statistics per request as CSV:");
var actions = string.Join(", ", Enum.GetNames(typeof(VC.ConditionGeneration.CachingAction)));
Console.Out.WriteLine("Request ID{0}, Error, E (C), Inconclusive, I (C), Out of Memory, OoM (C), Timeout, T (C), Verified, V (C), {1}", printTimes ? ", Time (ms)" : "", actions);
foreach (var kv in TimePerRequest.OrderBy(kv => ExecutionEngine.AutoRequestId(kv.Key)))
{
var s = StatisticsPerRequest[kv.Key];
var cacs = s.CachingActionCounts;
var c = cacs != null ? ", " + cacs.Select(ac => string.Format("{0,3}", ac)).Concat(", ") : "";
var t = printTimes ? string.Format(", {0,8:F0}", kv.Value.TotalMilliseconds) : "";
Console.Out.WriteLine("{0,-19}{1}, {2,2}, {3,2}, {4,2}, {5,2}, {6,2}, {7,2}, {8,2}, {9,2}, {10,2}, {11,2}{12}", kv.Key, t, s.ErrorCount, s.CachedErrorCount, s.InconclusiveCount, s.CachedInconclusiveCount, s.OutOfMemoryCount, s.CachedOutOfMemoryCount, s.TimeoutCount, s.CachedTimeoutCount, s.VerifiedCount, s.CachedVerifiedCount, c);
}
if (printTimes)
{
Console.Out.WriteLine();
Console.Out.WriteLine("Total time (ms) since first request: {0:F0}", end.Subtract(FirstRequestStart).TotalMilliseconds);
}
}
#endregion
if (SecureVCGen.outfile != null)
SecureVCGen.outfile.Close();
return outcome;
}
/// <summary>
///
/// </summary>
/// <param name="rootState"></param>
/// <param name="errDelegate"></param> to report err back to GUI
/// <returns></returns>
internal static IEnumerable <ProofState> GenerateSolution(ProofState rootState, ErrorReporterDelegate errDelegate)
{
var stack = new Stack <IEnumerator <ProofState> >();
ProofState lastSucc = null; // the last verified state, for recovering over-backtracking
var discarded = new List <Tuple <ProofState, VerifyResult> >(); // failed ps and its verified status
List <ProofState> proofState = new List <ProofState> ()
{
rootState
};
var rootBranches = rootState.EvalStep();
if (rootBranches == null)
{
yield break;
}
stack.Push(rootBranches.GetEnumerator());
IEnumerator <ProofState> enumerator = null;
List <int> backtrackList = null;
while (stack.Count > 0)
{
bool wasNull = false;
if (enumerator != null)
{
try {
if (enumerator.Current == null)
{
wasNull = true;
}
} catch {
wasNull = true;
}
}
if (enumerator == null || !enumerator.MoveNext())
{
// check if current is valid, and the enumerator is empty when current is invalid and MoveNext is null
if (enumerator != null && wasNull)
{
//Console.WriteLine("Null eval result is detected !");
foreach (var state in proofState)
{
discarded.Add(new Tuple <ProofState, VerifyResult>(state, VerifyResult.Unresolved));
}
}
enumerator = stack.Pop();
if (!enumerator.MoveNext())
{
continue;
}
}
var stateCount = 0;
proofState.Clear();
while (stateCount < VerifyNProofState)
{
var current = enumerator.Current;
proofState.Add(current);
stateCount++;
if (backtrackList != null)
{
current.SetBackTrackCount(backtrackList);
}
if (current.NeedVerify && proofState[0].GetVerifyN() > 1)
{
current.DecreaseVerifyN();
current.NeedVerify = false;
}
if (!enumerator.MoveNext())
{
break;
}
}
//should at least one state in the list, use [0] as a typical state;
var rep = proofState[0];
backtrackList = rep.GetBackTrackCount();
List <VerifyResult> ress = null;
List <bool> returned = null;
//check if any new added coded reuqires to call verifier, or reach the last line of code
if ((rep.NeedVerify && rep.GetVerifyN() == 1) || rep.IsCurFrameEvaluated())
{
foreach (var s in proofState)
{
s.ResetVerifyN();
s.NeedVerify = false;
}
bool backtracked = false;
ress = VerifyState(proofState);
returned = new List <bool>();
for (var i = 0; i < ress.Count; i++)
{
var res = ress[i];
var ret = false;
switch (res)
{
case VerifyResult.Verified:
//check if the frame are evaluated, as well as requiests for backtraking
proofState[i].MarkCurFrameAsTerminated(true, out backtracked);
if (backtracked)
{
lastSucc = proofState[i];
discarded.Add(new Tuple <ProofState, VerifyResult>(proofState[i], VerifyResult.Backtracked));
}
if (proofState[i].IsTerminated())
{
ret = true;
yield return(proofState[i]);
}
returned.Add(ret);
break;
case VerifyResult.Failed:
if (proofState[i].IsCurFrameEvaluated())
{
proofState[i].MarkCurFrameAsTerminated(false, out backtracked);
if (backtracked)
{
lastSucc = proofState[i];
discarded.Add(new Tuple <ProofState, VerifyResult>(proofState[i], VerifyResult.Backtracked));
}
if (proofState[i].IsTerminated())
{
ret = true;
yield return(proofState[i]);
}
}
returned.Add(ret);
break;
case VerifyResult.Unresolved:
//Console.WriteLine("in unresolved");
discarded.Add(new Tuple <ProofState, VerifyResult>(proofState[i], VerifyResult.Unresolved));
//discard current branch if fails to resolve
returned.Add(false);
continue;
default:
throw new ArgumentOutOfRangeException();
}
}
}
/*
* when failed, check if this method is evaluated , i.e. all tstmt are evalauted,
* if so, do nothing will dischard this branch and continue with the next one
* otherwise, continue to evaluate the next stmt
*/
if (!rep.IsCurFrameEvaluated())
{
//push the current one to the stack
stack.Push(enumerator);
//move to the next stmt
for (var i = 0; i < proofState.Count; i++)
{
if (returned == null || !returned[i])
{
stack.Push(proofState[i].EvalStep().GetEnumerator());
}
}
enumerator = stack.Pop();
}
else
{
backtrackList = rep.GetBackTrackCount(); // update the current bc count to the list
for (var i = 0; i < proofState.Count; i++)
{
if (returned == null || !returned[i])
{
if (proofState[i].InAsserstion)
{
proofState[i].GetErrHandler().ErrType = TacticBasicErr.ErrorType.Assertion;
var patchRes = proofState[i].ApplyPatch();
if (patchRes != null)
{
stack.Push(enumerator);
enumerator = patchRes.GetEnumerator();
}
}
else
{
proofState[i].GetErrHandler().ErrType = TacticBasicErr.ErrorType.NotProved;
}
discarded.Add(new Tuple <ProofState, VerifyResult>(proofState[i], VerifyResult.Failed));
}
}
}
}
//check if over-backchecked
if (backtrackList != null && backtrackList.Exists(x => x > 0))
{
if (lastSucc == null)
{
Console.WriteLine("!!! No more branch for the request of " + (backtrackList.Last() + 1) +
"backtracking, and no branch.");
}
else
{
Console.WriteLine("!!! No more branch for the request of " + lastSucc.GetOrignalTopBacktrack() +
", remaining " +
(backtrackList.Last() + 1 > lastSucc.GetOrignalTopBacktrack()
? lastSucc.GetOrignalTopBacktrack()
: backtrackList.Last() + 1) + " requests, return the last one.");
yield return(lastSucc);
}
}
else
{
// no result is successful
ProofState s0;
if (discarded.Count > 0)
{
s0 = discarded[discarded.Count - 1].Item1;
//s0.GetErrHandler().ExceptionReport();
}
else
{
s0 = rootState;
}
s0.ReportTacticError(s0.TopLevelTacApp.Tok,
"No solution is found. \n The error message from the last failed branch: ");
var errs = CompoundErrorInformation.GenerateErrorInfoList(s0);
if (errDelegate != null)
{
foreach (var err in errs)
{
errDelegate(err);
}
}
}
}
public bool Verify(Dafny.Program dafnyProgram, ResolverTagger resolver, string uniqueIdPrefix, string requestId, ErrorReporterDelegate er)
{
Dafny.Translator translator = new Dafny.Translator(dafnyProgram.reporter);
var translatorFlags = new Dafny.Translator.TranslatorFlags()
{
InsertChecksums = true, UniqueIdPrefix = uniqueIdPrefix
};
var boogiePrograms = Dafny.Translator.Translate(dafnyProgram, dafnyProgram.reporter, translatorFlags);
var impls = boogiePrograms.SelectMany(p => p.Item2.Implementations);
resolver.ReInitializeVerificationErrors(requestId, impls);
bool success = false;
var errorSink = new ErrorSink(this);
foreach (var kv in boogiePrograms)
{
var boogieProgram = kv.Item2;
// TODO(wuestholz): Maybe we should use a fixed program ID to limit the memory overhead due to the program cache in Boogie.
PipelineOutcome oc = BoogiePipeline(boogieProgram, 1 < Dafny.DafnyOptions.Clo.VerifySnapshots ? uniqueIdPrefix : null, requestId, errorSink, er);
switch (oc)
{
case PipelineOutcome.Done:
case PipelineOutcome.VerificationCompleted:
// TODO: This would be the place to proceed to compile the program, if desired
success = true;
break;
case PipelineOutcome.FatalError:
default:
return(false);
}
}
return(success);
}
internal new static IEnumerable<ProofState> Search(ProofState rootState, ErrorReporterDelegate er){
var stack = new Stack<IEnumerator<ProofState>>();
stack.Push(Interpreter.EvalStep(rootState).GetEnumerator());
IEnumerator<ProofState> enumerator = Enumerable.Empty<ProofState>().GetEnumerator();
while(stack.Count > 0) {
if(!enumerator.MoveNext()) {
enumerator = stack.Pop();
if(!enumerator.MoveNext())
continue;
}
var proofState = enumerator.Current;
//check if any new added coded reuqires to call verifier, or reach the last line of code
if(proofState.IfVerify || proofState.IsEvaluated()) {
proofState.IfVerify = false;
switch(VerifyState(proofState, er)) {
case VerifyResult.Verified:
proofState.MarkCurFrameAsTerminated(true);
if(proofState.IsTerminated()) {
yield return proofState;
yield break;
}
//stack.Push(enumerator);
//enumerator = (Interpreter.EvalStep(proofState).GetEnumerator());
break;
case VerifyResult.Failed:
if(proofState.IsEvaluated()) {
proofState.MarkCurFrameAsTerminated(false);
if(proofState.IsTerminated()) {
yield return proofState;
yield break;
}
}
break;
case VerifyResult.Unresolved:
//discharge current branch if fails to resolve
continue;
default:
throw new ArgumentOutOfRangeException();
}
}
/*
* when failed, check if this mmethod is evaluated , i.e. all tstmt are evalauted,
* if so, dischard this branch and continue with the next one
* otherwise, continue to evaluate the next stmt
*/
if(!proofState.IsEvaluated()) {
//push the current one to the stack
stack.Push(enumerator);
//move to the next stmt
enumerator = (Interpreter.EvalStep(proofState).GetEnumerator());
}
}
}
internal new static IEnumerable <ProofState> Search(ProofState rootState, ErrorReporterDelegate er)
{
var queue = new Queue <IEnumerator <ProofState> >();
queue.Enqueue(Interpreter.EvalStep(rootState).GetEnumerator());
while (queue.Count > 0)
{
// remove first enumerator on the queue
var enumerator = queue.Dequeue();
// if all the statements have been resolve skip
if (!enumerator.MoveNext())
{
continue;
}
var proofState = enumerator.Current;
queue.Enqueue(enumerator);
if (Verify)
{
if (proofState.IsEvaluated() || proofState.IsPartiallyEvaluated())
{
switch (VerifyState(proofState, er))
{
case VerifyResult.Cached:
if (proofState.IsPartiallyEvaluated())
{
yield return(proofState);
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
continue;
case VerifyResult.Verified:
yield return(proofState);
yield break;
case VerifyResult.Failed:
/*
* verification failed, but the evaluation is partial return
* but continue evaluating the proofState
*/
if (proofState.IsPartiallyEvaluated())
{
yield return(proofState);
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
continue;
default:
throw new ArgumentOutOfRangeException();
}
}
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
else
{
if (!(proofState.IsEvaluated() || proofState.IsPartiallyEvaluated()))
{
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
else
{
yield return(proofState);
if (proofState.IsPartiallyEvaluated())
{
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
}
}
}
}
public static IEnumerable <ProofState> EvalTopLevelTactic(ProofState state, Dictionary <IVariable, Type> variables,
Statement tacticApplication, ApplySuffix aps, ErrorReporterDelegate errorDelegate, bool ifPartial)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(variables));
Contract.Requires <ArgumentNullException>(Tcce.NonNull(tacticApplication));
Contract.Requires <ArgumentNullException>(state != null, "state");
Contract.Requires(tacticApplication == null ||
tacticApplication is UpdateStmt || tacticApplication is InlineTacticBlockStmt);
IEnumerable <ProofState> branches;
if (state.InitState(tacticApplication, aps, variables, ifPartial) == false)
{
return(null);
}
#if !TACNY_DEBUG
try {
#endif
if (state.GetErrHandler().Reporter.Count(ErrorLevel.Error) != 0)
{
var errs = CompoundErrorInformation.GenerateErrorInfoList(state);
if (errorDelegate != null)
{
foreach (var err in errs)
{
errorDelegate(err);
}
}
return(null);
}
branches = GenerateSolution(state, errorDelegate);
#if !TACNY_DEBUG
}
catch (Exception e) {
String msg;
List <CompoundErrorInformation> errs;
try {
msg = "Tactic unknown exception: " + e.Message;
errs = CompoundErrorInformation.GenerateErrorInfoList(state, msg);
} catch (Exception) {
msg = "Tactic exception";
errs = new List <CompoundErrorInformation>();
}
if (errorDelegate != null)
{
foreach (var err in errs)
{
errorDelegate(err);
}
}
return(null);
}
#endif
return(branches);
}
/// <summary>
/// Given a resolved and type checked Boogie program, infers invariants for the program
/// and then attempts to verify it. Returns:
/// - Done if command line specified no verification
/// - FatalError if a fatal error occurred, in which case an error has been printed to console
/// - VerificationCompleted if inference and verification completed, in which the out
/// parameters contain meaningful values
/// </summary>
public static PipelineOutcome InferAndVerify(Program program,
PipelineStatistics stats, string filename,
ErrorReporterDelegate er = null, string requestId = "unknown")
{
Contract.Requires(program != null);
Contract.Requires(stats != null);
Contract.Ensures(0 <= Contract.ValueAtReturn(out stats.InconclusiveCount) && 0 <= Contract.ValueAtReturn(out stats.TimeoutCount));
if (requestId == null)
{
requestId = "unknown";
}
RequestIdToCancellationTokenSources[requestId] = new List<CancellationTokenSource>();
#region Infer invariants using Abstract Interpretation
// Always use (at least) intervals, if not specified otherwise (e.g. with the "/noinfer" switch)
if (CommandLineOptions.Clo.UseAbstractInterpretation)
{
if (!CommandLineOptions.Clo.Ai.J_Intervals && !CommandLineOptions.Clo.Ai.J_Trivial)
{
// use /infer:j as the default
CommandLineOptions.Clo.Ai.J_Intervals = true;
}
}
Microsoft.Boogie.AbstractInterpretation.NativeAbstractInterpretation.RunAbstractInterpretation(program);
#endregion
#region Do some preprocessing on the program (e.g., loop unrolling, lambda expansion)
if (CommandLineOptions.Clo.LoopUnrollCount != -1)
{
program.UnrollLoops(CommandLineOptions.Clo.LoopUnrollCount, CommandLineOptions.Clo.SoundLoopUnrolling);
}
Dictionary<string, Dictionary<string, Block>> extractLoopMappingInfo = null;
if (CommandLineOptions.Clo.ExtractLoops)
{
extractLoopMappingInfo = program.ExtractLoops();
}
if (CommandLineOptions.Clo.PrintInstrumented)
{
program.Emit(new TokenTextWriter(Console.Out));
}
if (CommandLineOptions.Clo.ExpandLambdas)
{
LambdaHelper.ExpandLambdas(program);
//PrintBplFile ("-", program, true);
}
#endregion
if (!CommandLineOptions.Clo.Verify)
{
return PipelineOutcome.Done;
}
#region Run Houdini and verify
if (CommandLineOptions.Clo.ContractInfer)
{
return RunHoudini(program, stats, er, filename);
}
#endregion
#region Select and prioritize implementations that should be verified
var impls = program.TopLevelDeclarations.OfType<Implementation>().Where(
impl => impl != null && CommandLineOptions.Clo.UserWantsToCheckRoutine(cce.NonNull(impl.Name)) && !impl.SkipVerification);
// operate on a stable copy, in case it gets updated while we're running
Implementation[] stablePrioritizedImpls = null;
if (CommandLineOptions.Clo.VerifySnapshots)
{
impls.Iter(impl => { impl.DependenciesChecksum = DependencyCollector.DependenciesChecksum(impl); });
stablePrioritizedImpls = impls.OrderByDescending(
impl => impl.Priority != 1 ? impl.Priority : Cache.VerificationPriority(impl)).ToArray();
}
else
{
stablePrioritizedImpls = impls.OrderByDescending(impl => impl.Priority).ToArray();
}
#endregion
#region Verify each implementation
var outputCollector = new OutputCollector(stablePrioritizedImpls);
var outcome = PipelineOutcome.VerificationCompleted;
var tasks = new Task[stablePrioritizedImpls.Length];
for (int i = 0; i < stablePrioritizedImpls.Length && outcome != PipelineOutcome.FatalError; i++)
{
var taskIndex = i;
var id = stablePrioritizedImpls[i].Id;
CancellationTokenSource src;
if (ImplIdToCancellationTokenSource.TryGetValue(id, out src))
{
src.Cancel();
}
src = new CancellationTokenSource();
RequestIdToCancellationTokenSources[requestId].Add(src);
ImplIdToCancellationTokenSource[id] = src;
var t = Task.Factory.StartNew((dummy) =>
{
VerifyImplementation(program, stats, er, requestId, extractLoopMappingInfo, stablePrioritizedImpls, taskIndex, outputCollector, Checkers, src.Token);
ImplIdToCancellationTokenSource.Remove(id);
}, src.Token, TaskCreationOptions.LongRunning);
tasks[taskIndex] = t;
}
try
{
Task.WaitAll(tasks);
}
catch (AggregateException ae)
{
ae.Handle(e =>
{
var pe = e as ProverException;
if (pe != null)
{
printer.ErrorWriteLine(Console.Out, "Fatal Error: ProverException: {0}", e);
outcome = PipelineOutcome.FatalError;
return true;
}
var oce = e as OperationCanceledException;
if (oce != null)
{
return true;
}
return false;
});
}
finally
{
CleanupCheckers(requestId);
}
cce.NonNull(CommandLineOptions.Clo.TheProverFactory).Close();
outputCollector.WriteMoreOutput();
#endregion
return outcome;
}
/*
* public static bool ResolveAndVerify(Program program, ErrorReporterDelegate er) {
* Contract.Requires<ArgumentNullException>(program != null);
* var r = new Resolver(program);
* //var start = (DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalMilliseconds;
* r.ResolveProgram(program);
* //TODO: get program.reporter to check resolving result before verifying
* //var end = (DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalMilliseconds
*
* // check if resolution fails
* if (program.reporter.Count(ErrorLevel.Error) != 0){
* Console.Write("Fail to resolve prog, skip verifier ! \n");
* return false;
*
* }
* var boogieProg = Translate(program, program.Name, er);
* PipelineStatistics stats;
* List<ErrorInformation> errorList;
*
* //Console.WriteLine("call verifier in Tacny !!!");
* PipelineOutcome tmp = BoogiePipeline(boogieProg,
* new List<string> {program.Name}, program.Name, er,
* out stats, out errorList, program);
*
* return errorList.Count == 0;
* }
*/
public static Bpl.Program Translate(Program dafnyProgram, string uniqueIdPrefix, ErrorReporterDelegate er)
{
Contract.Requires <ArgumentNullException>(dafnyProgram != null, "dafnyProgram");
Contract.Requires <ArgumentNullException>(uniqueIdPrefix != null, "uniqueIdPrefix");
Contract.Ensures(Contract.Result <Bpl.Program>() != null);
var translator = new Translator(dafnyProgram.reporter, er)
{
InsertChecksums = true,
UniqueIdPrefix = uniqueIdPrefix
};
return(translator.Translate(dafnyProgram));
}
public static bool Verify(Program dafnyProgram, ResolverTagger resolver, string uniqueIdPrefix, string requestId, ErrorReporterDelegate er, Program unresolvedProgram)
{
var translator = new Translator(dafnyProgram.reporter, er)
{
InsertChecksums = true,
UniqueIdPrefix = uniqueIdPrefix
};
var boogieProgram = translator.Translate(dafnyProgram, unresolvedProgram);
resolver.ReInitializeVerificationErrors(requestId, boogieProgram.Implementations);
var outcome = BoogiePipeline(boogieProgram, 1 < CommandLineOptions.Clo.VerifySnapshots ? uniqueIdPrefix : null, requestId, er);
return(outcome == PipelineOutcome.Done || outcome == PipelineOutcome.VerificationCompleted);
}
private static void ProcessOutcome(VC.VCGen.Outcome outcome, List<Counterexample> errors, string timeIndication,
PipelineStatistics stats, TextWriter tw, int timeLimit, ErrorReporterDelegate er = null, string implName = null, IToken implTok = null, string requestId = null, bool wasCached = false)
{
Contract.Requires(stats != null);
UpdateStatistics(stats, outcome, errors, wasCached);
printer.Inform(timeIndication + OutcomeIndication(outcome, errors), tw);
ReportOutcome(outcome, er, implName, implTok, requestId, tw, timeLimit, errors);
}
private static void ReportOutcome(VC.VCGen.Outcome outcome, ErrorReporterDelegate er, string implName, IToken implTok, string requestId, TextWriter tw, int timeLimit, List<Counterexample> errors)
{
ErrorInformation errorInfo = null;
switch (outcome)
{
case VCGen.Outcome.ReachedBound:
tw.WriteLine(string.Format("Stratified Inlining: Reached recursion bound of {0}", CommandLineOptions.Clo.RecursionBound));
break;
case VCGen.Outcome.Errors:
case VCGen.Outcome.TimedOut:
if (implName != null && implTok != null)
{
if (outcome == ConditionGeneration.Outcome.TimedOut || (errors != null && errors.Any(e => e.IsAuxiliaryCexForDiagnosingTimeouts)))
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, string.Format("Verification of '{1}' timed out after {0} seconds", timeLimit, implName), requestId);
}
// Report timed out assertions as auxiliary info.
if (errors != null)
{
var cmpr = new CounterexampleComparer();
var timedOutAssertions = errors.Where(e => e.IsAuxiliaryCexForDiagnosingTimeouts).Distinct(cmpr).ToList();
timedOutAssertions.Sort(cmpr);
if (0 < timedOutAssertions.Count)
{
errorInfo.Msg += string.Format(" with {0} check(s) that timed out individually", timedOutAssertions.Count);
}
foreach (Counterexample error in timedOutAssertions)
{
var callError = error as CallCounterexample;
var returnError = error as ReturnCounterexample;
var assertError = error as AssertCounterexample;
IToken tok = null;
string msg = null;
if (callError != null)
{
tok = callError.FailingCall.tok;
msg = callError.FailingCall.ErrorData as string ?? "A precondition for this call might not hold.";
}
else if (returnError != null)
{
tok = returnError.FailingReturn.tok;
msg = "A postcondition might not hold on this return path.";
}
else
{
tok = assertError.FailingAssert.tok;
if (assertError.FailingAssert is LoopInitAssertCmd)
{
msg = "This loop invariant might not hold on entry.";
}
else if (assertError.FailingAssert is LoopInvMaintainedAssertCmd)
{
msg = "This loop invariant might not be maintained by the loop.";
}
else
{
msg = assertError.FailingAssert.ErrorData as string;
if (!CommandLineOptions.Clo.ForceBplErrors && assertError.FailingAssert.ErrorMessage != null)
{
msg = assertError.FailingAssert.ErrorMessage;
}
if (msg == null)
{
msg = "This assertion might not hold.";
}
}
}
errorInfo.AddAuxInfo(tok, msg, "Unverified check due to timeout");
}
}
}
break;
case VCGen.Outcome.OutOfMemory:
if (implName != null && implTok != null)
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, "Verification out of memory (" + implName + ")", requestId);
}
break;
case VCGen.Outcome.Inconclusive:
if (implName != null && implTok != null)
{
errorInfo = errorInformationFactory.CreateErrorInformation(implTok, "Verification inconclusive (" + implName + ")", requestId);
}
break;
}
if (errorInfo != null)
{
errorInfo.ImplementationName = implName;
if (er != null)
{
lock (er)
{
er(errorInfo);
}
}
else
{
printer.WriteErrorInformation(errorInfo, tw);
}
}
}
private static PipelineOutcome RunAbstractHoudini(Program program, PipelineStatistics stats, ErrorReporterDelegate er)
{
Contract.Requires(stats != null);
//CommandLineOptions.Clo.PrintErrorModel = 1;
CommandLineOptions.Clo.UseProverEvaluate = true;
CommandLineOptions.Clo.ModelViewFile = "z3model";
CommandLineOptions.Clo.UseArrayTheory = true;
CommandLineOptions.Clo.TypeEncodingMethod = CommandLineOptions.TypeEncoding.Monomorphic;
Houdini.AbstractDomainFactory.Initialize(program);
var domain = Houdini.AbstractDomainFactory.GetInstance(CommandLineOptions.Clo.AbstractHoudini);
// Run Abstract Houdini
var abs = new Houdini.AbsHoudini(program, domain);
var absout = abs.ComputeSummaries();
ProcessOutcome(absout.outcome, absout.errors, "", stats, Console.Out, CommandLineOptions.Clo.ProverKillTime, er);
ProcessErrors(absout.errors, absout.outcome, Console.Out, er);
//Houdini.PredicateAbs.Initialize(program);
//var abs = new Houdini.AbstractHoudini(program);
//abs.computeSummaries(new Houdini.PredicateAbs(program.TopLevelDeclarations.OfType<Implementation>().First().Name));
return PipelineOutcome.Done;
}
private static extern void TfLiteInterpreterOptionsSetErrorReporter(
TfLiteInterpreterOptions options,
ErrorReporterDelegate errorReporter,
IntPtr user_data);
private static void VerifyImplementation(Program program, PipelineStatistics stats, ErrorReporterDelegate er, string requestId, Dictionary<string, Dictionary<string, Block>> extractLoopMappingInfo, Implementation[] stablePrioritizedImpls, int index, OutputCollector outputCollector, List<Checker> checkers, string programId)
{
Implementation impl = stablePrioritizedImpls[index];
VerificationResult verificationResult = null;
var output = new StringWriter();
printer.Inform("", output); // newline
printer.Inform(string.Format("Verifying {0} ...", impl.Name), output);
int priority = 0;
var wasCached = false;
if (0 < CommandLineOptions.Clo.VerifySnapshots) {
var cachedResults = Cache.Lookup(impl, out priority);
if (cachedResults != null && priority == Priority.SKIP) {
if (CommandLineOptions.Clo.XmlSink != null) {
CommandLineOptions.Clo.XmlSink.WriteStartMethod(impl.Name, cachedResults.Start);
}
printer.Inform(string.Format("Retrieving cached verification result for implementation {0}...", impl.Name), output);
if (CommandLineOptions.Clo.VerifySnapshots < 3 || cachedResults.Outcome == ConditionGeneration.Outcome.Correct) {
verificationResult = cachedResults;
wasCached = true;
}
}
}
if (!wasCached)
{
#region Verify the implementation
verificationResult = new VerificationResult(requestId, impl, programId);
using (var vcgen = CreateVCGen(program, checkers))
{
vcgen.CachingActionCounts = stats.CachingActionCounts;
verificationResult.ProofObligationCountBefore = vcgen.CumulativeAssertionCount;
verificationResult.Start = DateTime.UtcNow;
if (CommandLineOptions.Clo.XmlSink != null)
{
CommandLineOptions.Clo.XmlSink.WriteStartMethod(impl.Name, verificationResult.Start);
}
try
{
if (CommandLineOptions.Clo.inferLeastForUnsat != null)
{
var svcgen = vcgen as VC.StratifiedVCGen;
Contract.Assert(svcgen != null);
var ss = new HashSet<string>();
foreach (var c in program.Constants)
{
if (!c.Name.StartsWith(CommandLineOptions.Clo.inferLeastForUnsat)) continue;
ss.Add(c.Name);
}
verificationResult.Outcome = svcgen.FindLeastToVerify(impl, ref ss);
verificationResult.Errors = new List<Counterexample>();
output.WriteLine("Result: {0}", string.Join(" ", ss));
}
else
{
verificationResult.Outcome = vcgen.VerifyImplementation(impl, out verificationResult.Errors, requestId);
if (CommandLineOptions.Clo.ExtractLoops && verificationResult.Errors != null)
{
var vcg = vcgen as VCGen;
if (vcg != null)
{
for (int i = 0; i < verificationResult.Errors.Count; i++)
{
verificationResult.Errors[i] = vcg.extractLoopTrace(verificationResult.Errors[i], impl.Name, program, extractLoopMappingInfo);
}
}
}
}
}
catch (VCGenException e)
{
var errorInfo = errorInformationFactory.CreateErrorInformation(impl.tok, String.Format("{0} (encountered in implementation {1}).", e.Message, impl.Name), requestId, "Error");
errorInfo.BoogieErrorCode = "BP5010";
errorInfo.ImplementationName = impl.Name;
printer.WriteErrorInformation(errorInfo, output);
if (er != null)
{
lock (er)
{
er(errorInfo);
}
}
verificationResult.Errors = null;
verificationResult.Outcome = VCGen.Outcome.Inconclusive;
}
catch (UnexpectedProverOutputException upo)
{
printer.AdvisoryWriteLine("Advisory: {0} SKIPPED because of internal error: unexpected prover output: {1}", impl.Name, upo.Message);
verificationResult.Errors = null;
verificationResult.Outcome = VCGen.Outcome.Inconclusive;
}
verificationResult.ProofObligationCountAfter = vcgen.CumulativeAssertionCount;
verificationResult.End = DateTime.UtcNow;
}
#endregion
#region Cache the verification result
if (0 < CommandLineOptions.Clo.VerifySnapshots && !string.IsNullOrEmpty(impl.Checksum))
{
Cache.Insert(impl, verificationResult);
}
#endregion
}
#region Process the verification results and statistics
ProcessOutcome(verificationResult.Outcome, verificationResult.Errors, TimeIndication(verificationResult), stats, output, impl.TimeLimit, er, verificationResult.ImplementationName, verificationResult.ImplementationToken, verificationResult.RequestId, wasCached);
ProcessErrors(verificationResult.Errors, verificationResult.Outcome, output, er, impl);
if (CommandLineOptions.Clo.XmlSink != null)
{
CommandLineOptions.Clo.XmlSink.WriteEndMethod(verificationResult.Outcome.ToString().ToLowerInvariant(), verificationResult.End, verificationResult.End - verificationResult.Start);
}
outputCollector.Add(index, output);
outputCollector.WriteMoreOutput();
if (verificationResult.Outcome == VCGen.Outcome.Errors || CommandLineOptions.Clo.Trace)
{
Console.Out.Flush();
}
#endregion
}
internal new static IEnumerable <ProofState> Search(ProofState rootState, ErrorReporterDelegate er)
{
var queue = new Queue <IEnumerator <ProofState> >();
queue.Enqueue(Interpreter.EvalStep(rootState).GetEnumerator());
IEnumerator <ProofState> enumerator = Enumerable.Empty <ProofState>().GetEnumerator();
while (queue.Count > 0)
{
// check if there is any more item in the enumerartor, if so, MoveNext will move to the next item
if (!enumerator.MoveNext())
{
// if no item in the current enumerator, pop a new enumerator from the queie,
enumerator = queue.Dequeue();
// set the start point for enumulator, if there is no valid start point, i.e. empty, skip this one
if (!enumerator.MoveNext())
{
continue;
}
}
var proofState = enumerator.Current;
//check if any new added code reuqires to call the dafny to verity, or reach the last line of code
if (proofState.IfVerify || proofState.IsEvaluated())
{
proofState.IfVerify = false;
switch (VerifyState(proofState, er))
{
case VerifyResult.Verified:
proofState.MarkCurFrameAsTerminated(true);
if (proofState.IsTerminated())
{
yield return(proofState);
yield break;
}
//queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
break;
case VerifyResult.Failed:
if (proofState.IsEvaluated())
{
proofState.MarkCurFrameAsTerminated(false);
if (proofState.IsTerminated())
{
yield return(proofState);
yield break;
}
}
break;
case VerifyResult.Unresolved:
//discharge current branch if fails to resolve
continue;
default:
throw new ArgumentOutOfRangeException();
}
}
/*
* when failed, check if this mmethod is evaluated , i.e. all tstmt are evalauted,
* if so, dischard this branch and continue with the next one
* otherwise, continue to evaluate the next stmt
*/
if (!proofState.IsEvaluated())
{
queue.Enqueue(Interpreter.EvalStep(proofState).GetEnumerator());
}
}
}
protected override void Execute(IntPtr bridgeFunc, IProgressMonitor subMonitor)
{
subMonitor_ = subMonitor;
taskStarted_ = false;
BoostTestRunDelegate bridge =
(BoostTestRunDelegate)Marshal.GetDelegateForFunctionPointer(
bridgeFunc,
typeof(BoostTestRunDelegate)
);
VisitorDelegate visitTestCase = new VisitorDelegate(VisitTestCase);
VisitorDelegate beginVisitTestSuite = new VisitorDelegate(BeginVisitTestSuite);
VisitorDelegate endVisitTestSuite = new VisitorDelegate(EndVisitTestSuite);
VisitorDelegate shouldSkip = new VisitorDelegate(ShouldSkip);
TestStartDelegate testStart = new TestStartDelegate(TestStart);
TestDelegate testFinish = new TestDelegate(TestFinish);
TestDelegate testAborted = new TestDelegate(TestAborted);
TestUnitDelegate testUnitStart = new TestUnitDelegate(TestUnitStart);
TestUnitFinishedDelegate testUnitFinish = new TestUnitFinishedDelegate(TestUnitFinish);
TestUnitDelegate testUnitSkipped = new TestUnitDelegate(TestUnitSkipped);
TestUnitDelegate testUnitAborted = new TestUnitDelegate(TestUnitAborted);
AssertionResultDelegate assertionResult = new AssertionResultDelegate(AssertionResult);
ExceptionCaughtDelegate exceptionCaught = new ExceptionCaughtDelegate(ExceptionCaught);
ErrorReporterDelegate errorReporter =
new ErrorReporterDelegate((text) => Logger.Log(LogSeverity.Error, text));
bridge(
File.FullName,
visitTestCase,
beginVisitTestSuite,
endVisitTestSuite,
shouldSkip,
testStart,
testFinish,
testAborted,
testUnitStart,
testUnitFinish,
testUnitSkipped,
testUnitAborted,
assertionResult,
exceptionCaught,
errorReporter
);
// Cancel all tests that were not completed, if any.
while (testStepsStack_.Count > 0)
{
TestResult result = testResultsStack_.Pop();
result.Outcome = TestOutcome.Canceled;
MessageSink.Publish(
new TestStepFinishedMessage
{
StepId = testStepsStack_.Pop().Id,
Result = result
}
);
}
if (taskStarted_) taskCookie_.Dispose();
}
internal new static IEnumerable <ProofState> Search(ProofState rootState, ErrorReporterDelegate er)
{
var stack = new Stack <IEnumerator <ProofState> >();
stack.Push(Interpreter.EvalStep(rootState).GetEnumerator());
IEnumerator <ProofState> enumerator = Enumerable.Empty <ProofState>().GetEnumerator();
while (stack.Count > 0)
{
if (!enumerator.MoveNext())
{
enumerator = stack.Pop();
if (!enumerator.MoveNext())
{
continue;
}
}
var proofState = enumerator.Current;
//check if any new added coded reuqires to call verifier, or reach the last line of code
if (proofState.IfVerify || proofState.IsEvaluated())
{
proofState.IfVerify = false;
switch (VerifyState(proofState, er))
{
case VerifyResult.Verified:
proofState.MarkCurFrameAsTerminated(true);
if (proofState.IsTerminated())
{
yield return(proofState);
yield break;
}
//stack.Push(enumerator);
//enumerator = (Interpreter.EvalStep(proofState).GetEnumerator());
break;
case VerifyResult.Failed:
if (proofState.IsEvaluated())
{
proofState.MarkCurFrameAsTerminated(false);
if (proofState.IsTerminated())
{
yield return(proofState);
yield break;
}
}
break;
case VerifyResult.Unresolved:
//discharge current branch if fails to resolve
continue;
default:
throw new ArgumentOutOfRangeException();
}
}
/*
* when failed, check if this mmethod is evaluated , i.e. all tstmt are evalauted,
* if so, dischard this branch and continue with the next one
* otherwise, continue to evaluate the next stmt
*/
if (!proofState.IsEvaluated())
{
//push the current one to the stack
stack.Push(enumerator);
//move to the next stmt
enumerator = (Interpreter.EvalStep(proofState).GetEnumerator());
}
}
}
/// <summary>
/// Resolve, type check, infer invariants for, and verify the given Boogie program.
/// The intention is that this Boogie program has been produced by translation from something
/// else. Hence, any resolution errors and type checking errors are due to errors in
/// the translation.
/// </summary>
static PipelineOutcome BoogiePipeline(Bpl.Program /*!*/ program, string programId, string requestId, ErrorSink errorSink, ErrorReporterDelegate er)
{
Contract.Requires(program != null);
PipelineOutcome oc = BoogieResolveAndTypecheck(program, errorSink);
if (oc == PipelineOutcome.ResolvedAndTypeChecked)
{
ExecutionEngine.EliminateDeadVariables(program);
ExecutionEngine.CollectModSets(program);
ExecutionEngine.CoalesceBlocks(program);
ExecutionEngine.Inline(program);
return(ExecutionEngine.InferAndVerify(program, new PipelineStatistics(), programId, er, requestId));
}
return(oc);
}
public IEnumerable <ProofState> Search(ProofState state, ErrorReporterDelegate er)
{
Contract.Requires(state != null);
return(default(IEnumerable <ProofState>));
}
/// <summary>
/// Pipeline the boogie program to Dafny where it is valid
/// </summary>
/// <returns>Exit value</returns>
public static PipelineOutcome BoogiePipeline(Bpl.Program program, IList <string> fileNames, string programId, ErrorReporterDelegate er, out PipelineStatistics stats, out List <ErrorInformation> errorList, Program tmpDafnyProgram = null)
{
Contract.Requires(program != null);
Contract.Ensures(0 <= Contract.ValueAtReturn(out stats).InconclusiveCount&& 0 <= Contract.ValueAtReturn(out stats).TimeoutCount);
LinearTypeChecker ltc;
CivlTypeChecker ctc;
string baseName = cce.NonNull(System.IO.Path.GetFileName(fileNames[fileNames.Count - 1]));
baseName = cce.NonNull(System.IO.Path.ChangeExtension(baseName, "bpl"));
string bplFileName = System.IO.Path.Combine(System.IO.Path.GetTempPath(), baseName);
errorList = new List <ErrorInformation>();
stats = new PipelineStatistics();
PipelineOutcome oc = ExecutionEngine.ResolveAndTypecheck(program, bplFileName, out ltc, out ctc);
switch (oc)
{
case PipelineOutcome.ResolvedAndTypeChecked:
ExecutionEngine.EliminateDeadVariables(program);
ExecutionEngine.CollectModSets(program);
ExecutionEngine.CoalesceBlocks(program);
ExecutionEngine.Inline(program);
errorList = new List <ErrorInformation>();
var tmp = new List <ErrorInformation>();
oc = ExecutionEngine.InferAndVerify(program, stats, programId, errorInfo => {
tmp.Add(errorInfo);
});
errorList.AddRange(tmp);
return(oc);
default:
Contract.Assert(false);
throw new cce.UnreachableException(); // unexpected outcome
}
}
private static PipelineOutcome RunMLHoudini(Program program, PipelineStatistics stats, ErrorReporterDelegate er, string filename)
{
Contract.Requires(stats != null);
//CommandLineOptions.Clo.PrintErrorModel = 1;
CommandLineOptions.Clo.UseProverEvaluate = true;
CommandLineOptions.Clo.ModelViewFile = "z3model";
CommandLineOptions.Clo.UseArrayTheory = true;
CommandLineOptions.Clo.TypeEncodingMethod = CommandLineOptions.TypeEncoding.Monomorphic;
// Run Abstract Houdini
var mlice = new Houdini.MLHoudini(program, CommandLineOptions.Clo.MLHoudini, filename);
var mliceout = mlice.ComputeSummaries();
ProcessOutcome(mliceout.outcome, mliceout.errors, "", stats, Console.Out, CommandLineOptions.Clo.ProverKillTime, er);
ProcessErrors(mliceout.errors, mliceout.outcome, Console.Out, er);
return PipelineOutcome.Done;
}