public override Procedure VisitProcedure(Procedure node)
{
Debug.Assert(civlTypeChecker.procToYieldingProc.ContainsKey(node));
if (!procToDuplicate.ContainsKey(node))
{
YieldingProc yieldingProc = civlTypeChecker.procToYieldingProc[node];
Debug.Assert(layerNum <= yieldingProc.upperLayer);
Procedure proc = (Procedure)node.Clone();
proc.Name = civlTypeChecker.AddNamePrefix($"{node.Name}_{layerNum}");
proc.InParams = this.VisitVariableSeq(node.InParams);
proc.OutParams = this.VisitVariableSeq(node.OutParams);
proc.Requires = this.VisitRequiresSeq(node.Requires);
proc.Ensures = this.VisitEnsuresSeq(node.Ensures);
if (yieldingProc is MoverProc moverProc && yieldingProc.upperLayer == layerNum)
{
proc.Modifies = moverProc.modifiedGlobalVars.Select(g => Expr.Ident(g)).ToList();
}
else
{
proc.Modifies = civlTypeChecker.GlobalVariables.Select(v => Expr.Ident(v)).ToList();
yieldingProcs.Add(proc);
}
procToDuplicate[node] = proc;
absyMap[proc] = node;
}
public static void AddCheckers(CivlTypeChecker civlTypeChecker)
{
foreach (var action in civlTypeChecker.AllAtomicActions.Where(a => a.HasPendingAsyncs))
{
var requires = action.gate.Select(g => new Requires(false, g.Expr)).ToList();
var cmds = new List <Cmd>
{
CmdHelper.CallCmd(
action.proc,
action.impl.InParams.Select(Expr.Ident).ToList <Expr>(),
action.impl.OutParams.Select(Expr.Ident).ToList())
};
var blocks = new List <Block>()
{
new Block(Token.NoToken, "init", cmds, CmdHelper.ReturnCmd)
};
var PAs = Expr.Ident(action.impl.OutParams.Last(p => p.TypedIdent.Type.Equals(civlTypeChecker.pendingAsyncMultisetType)));
var paBound = civlTypeChecker.BoundVariable("pa", civlTypeChecker.pendingAsyncType);
var pa = Expr.Ident(paBound);
var nonnegativeExpr =
new ForallExpr(Token.NoToken, new List <Variable> {
paBound
},
Expr.Ge(Expr.Select(PAs, pa), Expr.Literal(0)));
var correctTypeExpr = new ForallExpr(Token.NoToken, new List <Variable> {
paBound
},
Expr.Imp(
Expr.Gt(Expr.Select(PAs, pa), Expr.Literal(0)),
Expr.Or(action.pendingAsyncs.Select(a => ExprHelper.FunctionCall(a.pendingAsyncCtor.membership, pa)))));
var ensures = new List <Ensures>
{
new Ensures(false, nonnegativeExpr)
{
ErrorData = $"Action {action.proc.Name} might create negative pending asyncs"
},
new Ensures(false, correctTypeExpr)
{
ErrorData = $"Action {action.proc.Name} might create undeclared pending asyncs"
},
};
CivlUtil.ResolveAndTypecheck(ensures);
var proc = new Procedure(Token.NoToken, civlTypeChecker.AddNamePrefix($"PendingAsyncChecker_{action.proc.Name}"), new List <TypeVariable>(),
action.impl.InParams, action.impl.OutParams,
requires, action.proc.Modifies, ensures);
var impl = new Implementation(Token.NoToken, proc.Name, proc.TypeParameters,
proc.InParams, proc.OutParams, new List <Variable>(), blocks)
{
Proc = proc
};
civlTypeChecker.program.AddTopLevelDeclaration(proc);
civlTypeChecker.program.AddTopLevelDeclaration(impl);
}
}
private Block CreateInitialBlock(Implementation impl, List <Cmd> preconditions)
{
var initCmds = new List <Cmd>(preconditions);
initCmds.AddRange(globalSnapshotInstrumentation.CreateInitCmds());
initCmds.AddRange(refinementInstrumentation.CreateInitCmds());
initCmds.AddRange(noninterferenceInstrumentation.CreateInitCmds(impl));
return(BlockHelper.Block(civlTypeChecker.AddNamePrefix("init"), initCmds, new List <Block> {
impl.Blocks[0]
}));
}
private static Tuple <Procedure, Implementation> GenerateAbstractionChecker(CivlTypeChecker civlTypeChecker, AtomicAction action, AtomicAction abs)
{
var requires = abs.gate.Select(g => new Requires(false, g.Expr)).ToList();
// TODO: check frame computation
var frame = new HashSet <Variable>(
action.modifiedGlobalVars
.Union(action.gateUsedGlobalVars)
.Union(abs.modifiedGlobalVars)
.Union(abs.gateUsedGlobalVars));
var tr = TransitionRelationComputation.Refinement(civlTypeChecker, abs, frame);
var ensures = new List <Ensures> {
new Ensures(false, tr)
{
ErrorData = $"Abstraction {abs.proc.Name} does not summarize {action.proc.Name}"
}
};
var subst = InductiveSequentialization.GetSubstitution(action, abs);
List <Cmd> cmds = InductiveSequentialization.GetGateAsserts(action, subst,
$"Abstraction {abs.proc.Name} fails gate of {action.proc.Name}").ToList <Cmd>();
cmds.Add(
CmdHelper.CallCmd(
action.proc,
abs.impl.InParams.Select(Expr.Ident).ToList <Expr>(),
abs.impl.OutParams.Select(Expr.Ident).ToList()
));
var blocks = new List <Block> {
new Block(Token.NoToken, "init", cmds, CmdHelper.ReturnCmd)
};
var proc = new Procedure(
Token.NoToken,
civlTypeChecker.AddNamePrefix($"AbstractionCheck_{action.proc.Name}_{abs.proc.Name}"),
new List <TypeVariable>(),
abs.impl.InParams,
abs.impl.OutParams,
requires,
action.proc.Modifies,
ensures);
var impl = new Implementation(
Token.NoToken,
proc.Name,
new List <TypeVariable>(),
proc.InParams,
proc.OutParams,
new List <Variable>(),
blocks)
{
Proc = proc
};
return(Tuple.Create(proc, impl));
}
private void AddChecker(string checkerName, List <Variable> inputs, List <Variable> outputs, List <Variable> locals,
List <Requires> requires, List <Ensures> ensures, List <Block> blocks)
{
checkerName = civlTypeChecker.AddNamePrefix(checkerName);
Procedure proc = new Procedure(Token.NoToken, checkerName, new List <TypeVariable>(), inputs, outputs, requires,
civlTypeChecker.GlobalVariables.Select(v => Expr.Ident(v)).ToList(), ensures);
Implementation impl = new Implementation(Token.NoToken, checkerName, new List <TypeVariable>(), inputs, outputs,
locals, blocks);
impl.Proc = proc;
this.decls.Add(impl);
this.decls.Add(proc);
}
private YieldingProcInstrumentation(
CivlTypeChecker civlTypeChecker,
LinearPermissionInstrumentation linearPermissionInstrumentation,
int layerNum,
AbsyMap absyMap,
Dictionary <CallCmd, Block> refinementBlocks)
{
this.civlTypeChecker = civlTypeChecker;
this.layerNum = layerNum;
this.absyMap = absyMap;
this.linearPermissionInstrumentation = linearPermissionInstrumentation;
this.refinementBlocks = refinementBlocks;
parallelCallAggregators = new Dictionary <string, Procedure>();
noninterferenceCheckerDecls = new List <Declaration>();
var linearTypeChecker = civlTypeChecker.linearTypeChecker;
List <Variable> inputs = new List <Variable>();
foreach (string domainName in linearTypeChecker.linearDomains.Keys)
{
inputs.Add(linearTypeChecker.LinearDomainInFormal(domainName));
}
foreach (Variable g in civlTypeChecker.GlobalVariables)
{
inputs.Add(OldGlobalFormal(g));
}
wrapperNoninterferenceCheckerProc = new Procedure(Token.NoToken,
civlTypeChecker.AddNamePrefix($"Wrapper_NoninterferenceChecker_{layerNum}"), new List <TypeVariable>(),
inputs, new List <Variable>(), new List <Requires>(), new List <IdentifierExpr>(), new List <Ensures>());
CivlUtil.AddInlineAttribute(wrapperNoninterferenceCheckerProc);
// initialize globalSnapshotInstrumentation
globalSnapshotInstrumentation = new GlobalSnapshotInstrumentation(civlTypeChecker);
// initialize noninterferenceInstrumentation
if (CommandLineOptions.Clo.TrustNoninterference)
{
noninterferenceInstrumentation = new NoneNoninterferenceInstrumentation();
}
else
{
noninterferenceInstrumentation = new SomeNoninterferenceInstrumentation(
civlTypeChecker,
linearTypeChecker,
linearPermissionInstrumentation,
globalSnapshotInstrumentation.OldGlobalMap,
wrapperNoninterferenceCheckerProc);
}
}
private void AddChecker(string checkerName, List <Variable> inputs, List <Variable> outputs, List <Variable> locals,
List <Requires> requires, List <Cmd> cmds)
{
checkerName = civlTypeChecker.AddNamePrefix(checkerName);
var blocks = new List <Block> {
BlockHelper.Block("init", cmds)
};
Procedure proc = DeclHelper.Procedure(checkerName, inputs, outputs, requires,
civlTypeChecker.GlobalVariables.Select(v => Expr.Ident(v)).ToList(), new List <Ensures>());
Implementation impl = DeclHelper.Implementation(proc, inputs, outputs, locals, blocks);
this.decls.Add(impl);
this.decls.Add(proc);
}
private Block CreateInitialBlock(Implementation impl, List <Cmd> preconditions)
{
var initCmds = new List <Cmd>(preconditions);
initCmds.AddRange(globalSnapshotInstrumentation.CreateInitCmds());
initCmds.AddRange(refinementInstrumentation.CreateInitCmds());
initCmds.AddRange(noninterferenceInstrumentation.CreateInitCmds(impl));
var gotoCmd = new GotoCmd(Token.NoToken, new List <String> {
impl.Blocks[0].Label
},
new List <Block> {
impl.Blocks[0]
});
return(new Block(Token.NoToken, civlTypeChecker.AddNamePrefix("init"), initCmds, gotoCmd));
}
private static Tuple <Procedure, Implementation> GenerateAbstractionChecker(CivlTypeChecker civlTypeChecker, AtomicAction action, AtomicAction abs)
{
var requires = abs.gate.Select(g => new Requires(false, g.Expr)).ToList();
// TODO: check frame computation
var frame = new HashSet <Variable>(
action.modifiedGlobalVars
.Union(action.gateUsedGlobalVars)
.Union(abs.modifiedGlobalVars)
.Union(abs.gateUsedGlobalVars));
var subst = InductiveSequentialization.GetSubstitution(action, abs);
List <Cmd> cmds = InductiveSequentialization.GetGateAsserts(action, subst,
$"Abstraction {abs.proc.Name} fails gate of {action.proc.Name}").ToList <Cmd>();
cmds.Add(
CmdHelper.CallCmd(
action.proc,
abs.impl.InParams,
abs.impl.OutParams
));
cmds.Add(
CmdHelper.AssertCmd(
abs.proc.tok,
TransitionRelationComputation.Refinement(civlTypeChecker, abs, frame),
$"Abstraction {abs.proc.Name} does not summarize {action.proc.Name}"
));
var blocks = new List <Block> {
BlockHelper.Block("init", cmds)
};
var proc = DeclHelper.Procedure(
civlTypeChecker.AddNamePrefix($"AbstractionCheck_{action.proc.Name}_{abs.proc.Name}"),
abs.impl.InParams,
abs.impl.OutParams,
requires,
action.proc.Modifies,
new List <Ensures>());
var impl = DeclHelper.Implementation(
proc,
proc.InParams,
proc.OutParams,
new List <Variable>(),
blocks);
return(Tuple.Create(proc, impl));
}
public static List <Declaration> CreateNoninterferenceCheckers(
CivlTypeChecker civlTypeChecker,
int layerNum,
AbsyMap absyMap,
DeclWithFormals decl,
List <Variable> declLocalVariables)
{
var linearTypeChecker = civlTypeChecker.linearTypeChecker;
Dictionary <string, Variable> domainNameToHoleVar = new Dictionary <string, Variable>();
Dictionary <Variable, Variable> localVarMap = new Dictionary <Variable, Variable>();
Dictionary <Variable, Expr> map = new Dictionary <Variable, Expr>();
List <Variable> locals = new List <Variable>();
List <Variable> inputs = new List <Variable>();
foreach (var domainName in linearTypeChecker.linearDomains.Keys)
{
var inParam = linearTypeChecker.LinearDomainInFormal(domainName);
inputs.Add(inParam);
domainNameToHoleVar[domainName] = inParam;
}
foreach (Variable local in declLocalVariables.Union(decl.InParams).Union(decl.OutParams))
{
var copy = CopyLocal(local);
locals.Add(copy);
localVarMap[local] = copy;
map[local] = Expr.Ident(copy);
}
Dictionary <Variable, Expr> oldLocalMap = new Dictionary <Variable, Expr>();
Dictionary <Variable, Expr> assumeMap = new Dictionary <Variable, Expr>(map);
foreach (Variable g in civlTypeChecker.GlobalVariables)
{
var copy = OldGlobalLocal(civlTypeChecker, g);
locals.Add(copy);
oldLocalMap[g] = Expr.Ident(copy);
Formal f = SnapshotGlobalFormal(civlTypeChecker, g);
inputs.Add(f);
assumeMap[g] = Expr.Ident(f);
}
var linearPermissionInstrumentation = new LinearPermissionInstrumentation(civlTypeChecker,
layerNum, absyMap, domainNameToHoleVar, localVarMap);
List <YieldInfo> yieldInfos = null;
string noninterferenceCheckerName = null;
if (decl is Implementation impl)
{
noninterferenceCheckerName = $"impl_{absyMap.Original(impl).Name}_{layerNum}";
yieldInfos = CollectYields(civlTypeChecker, absyMap, layerNum, impl).Select(kv =>
new YieldInfo(linearPermissionInstrumentation.DisjointnessAssumeCmds(kv.Key, false), kv.Value)).ToList();
}
else if (decl is Procedure proc)
{
yieldInfos = new List <YieldInfo>();
if (civlTypeChecker.procToYieldInvariant.ContainsKey(proc))
{
noninterferenceCheckerName = $"yield_{proc.Name}";
if (proc.Requires.Count > 0)
{
var disjointnessCmds = linearPermissionInstrumentation.ProcDisjointnessAssumeCmds(proc, true);
var yieldPredicates = proc.Requires.Select(requires =>
requires.Free
? (PredicateCmd) new AssumeCmd(requires.tok, requires.Condition)
: (PredicateCmd) new AssertCmd(requires.tok, requires.Condition)).ToList();
yieldInfos.Add(new YieldInfo(disjointnessCmds, yieldPredicates));
}
}
else
{
noninterferenceCheckerName = $"proc_{absyMap.Original(proc).Name}_{layerNum}";
if (proc.Requires.Count > 0)
{
var entryDisjointnessCmds =
linearPermissionInstrumentation.ProcDisjointnessAssumeCmds(proc, true);
var entryYieldPredicates = proc.Requires.Select(requires =>
requires.Free
? (PredicateCmd) new AssumeCmd(requires.tok, requires.Condition)
: (PredicateCmd) new AssertCmd(requires.tok, requires.Condition)).ToList();
yieldInfos.Add(new YieldInfo(entryDisjointnessCmds, entryYieldPredicates));
}
if (proc.Ensures.Count > 0)
{
var exitDisjointnessCmds =
linearPermissionInstrumentation.ProcDisjointnessAssumeCmds(proc, false);
var exitYieldPredicates = proc.Ensures.Select(ensures =>
ensures.Free
? (PredicateCmd) new AssumeCmd(ensures.tok, ensures.Condition)
: (PredicateCmd) new AssertCmd(ensures.tok, ensures.Condition)).ToList();
yieldInfos.Add(new YieldInfo(exitDisjointnessCmds, exitYieldPredicates));
}
}
}
else
{
Debug.Assert(false);
}
var filteredYieldInfos = yieldInfos.Where(info =>
info.invariantCmds.Any(predCmd => new GlobalAccessChecker().AccessesGlobal(predCmd.Expr)));
if (filteredYieldInfos.Count() == 0)
{
return(new List <Declaration>());
}
Substitution assumeSubst = Substituter.SubstitutionFromDictionary(assumeMap);
Substitution oldSubst = Substituter.SubstitutionFromDictionary(oldLocalMap);
Substitution subst = Substituter.SubstitutionFromDictionary(map);
List <Block> noninterferenceCheckerBlocks = new List <Block>();
List <Block> labelTargets = new List <Block>();
Block noninterferenceCheckerBlock = BlockHelper.Block("exit", new List <Cmd>());
labelTargets.Add(noninterferenceCheckerBlock);
noninterferenceCheckerBlocks.Add(noninterferenceCheckerBlock);
int yieldCount = 0;
foreach (var kv in filteredYieldInfos)
{
var newCmds = new List <Cmd>(kv.disjointnessCmds);
foreach (var predCmd in kv.invariantCmds)
{
var newExpr = Substituter.ApplyReplacingOldExprs(assumeSubst, oldSubst, predCmd.Expr);
newCmds.Add(new AssumeCmd(predCmd.tok, newExpr));
}
foreach (var predCmd in kv.invariantCmds)
{
if (predCmd is AssertCmd)
{
var newExpr = Substituter.ApplyReplacingOldExprs(subst, oldSubst, predCmd.Expr);
AssertCmd assertCmd = new AssertCmd(predCmd.tok, newExpr, predCmd.Attributes);
assertCmd.ErrorData = "Non-interference check failed";
newCmds.Add(assertCmd);
}
}
newCmds.Add(CmdHelper.AssumeCmd(Expr.False));
noninterferenceCheckerBlock = BlockHelper.Block("L" + yieldCount++, newCmds);
labelTargets.Add(noninterferenceCheckerBlock);
noninterferenceCheckerBlocks.Add(noninterferenceCheckerBlock);
}
noninterferenceCheckerBlocks.Insert(0, BlockHelper.Block("enter", new List <Cmd>(), labelTargets));
// Create the yield checker procedure
noninterferenceCheckerName = civlTypeChecker.AddNamePrefix($"NoninterferenceChecker_{noninterferenceCheckerName}");
var noninterferenceCheckerProc = DeclHelper.Procedure(noninterferenceCheckerName,
inputs, new List <Variable>(), new List <Requires>(), new List <IdentifierExpr>(), new List <Ensures>());
CivlUtil.AddInlineAttribute(noninterferenceCheckerProc);
// Create the yield checker implementation
var noninterferenceCheckerImpl = DeclHelper.Implementation(noninterferenceCheckerProc,
inputs, new List <Variable>(), locals, noninterferenceCheckerBlocks);
CivlUtil.AddInlineAttribute(noninterferenceCheckerImpl);
return(new List <Declaration> {
noninterferenceCheckerProc, noninterferenceCheckerImpl
});
}
private static void AddChecker(CivlTypeChecker civlTypeChecker, Action action, List<Declaration> decls)
{
var linearTypeChecker = civlTypeChecker.linearTypeChecker;
// Note: The implementation should be used as the variables in the
// gate are bound to implementation and not to the procedure.
Implementation impl = action.impl;
List<Variable> inputs = impl.InParams;
List<Variable> outputs = impl.OutParams;
List<Variable> locals = new List<Variable>(2);
var paLocal1 = civlTypeChecker.LocalVariable("pa1", civlTypeChecker.pendingAsyncType);
var paLocal2 = civlTypeChecker.LocalVariable("pa2", civlTypeChecker.pendingAsyncType);
var pa1 = Expr.Ident(paLocal1);
var pa2 = Expr.Ident(paLocal2);
if (civlTypeChecker.pendingAsyncType != null)
{
locals.Add(paLocal1);
locals.Add(paLocal2);
}
List<Requires> requires = action.gate.Select(a => new Requires(false, a.Expr)).ToList();
List<LinearityCheck> linearityChecks = new List<LinearityCheck>();
foreach (var domain in linearTypeChecker.linearDomains.Values)
{
// Linear in vars
var inVars = inputs.Union(action.modifiedGlobalVars)
.Where(x => linearTypeChecker.FindDomainName(x) == domain.domainName)
.Where(x => InKinds.Contains(linearTypeChecker.FindLinearKind(x)))
.Select(Expr.Ident)
.ToList();
// Linear out vars
var outVars = inputs.Union(outputs).Union(action.modifiedGlobalVars)
.Where(x => linearTypeChecker.FindDomainName(x) == domain.domainName)
.Where(x => OutKinds.Contains(linearTypeChecker.FindLinearKind(x)))
.Select(Expr.Ident)
.ToList();
// First kind
// Permissions in linear output variables are a subset of permissions in linear input variables.
if (outVars.Count > 0)
{
linearityChecks.Add(new LinearityCheck(
null,
OutPermsSubsetInPerms(domain, inVars, outVars),
$"Potential linearity violation in outputs for domain {domain.domainName}.",
"variables"));
}
if (action is AtomicAction atomicAction && atomicAction.HasPendingAsyncs)
{
var PAs = Expr.Ident(atomicAction.impl.OutParams.Last());
foreach (var pendingAsync in atomicAction.pendingAsyncs)
{
var pendingAsyncLinearParams = PendingAsyncLinearParams(linearTypeChecker, domain, pendingAsync, pa1);
if (pendingAsyncLinearParams.Count == 0) continue;
// Second kind
// Permissions in linear output variables + linear inputs of a single pending async
// are a subset of permissions in linear input variables.
var exactlyOnePA = Expr.And(
ExprHelper.FunctionCall(pendingAsync.pendingAsyncCtor.membership, pa1),
Expr.Eq(Expr.Select(PAs, pa1), Expr.Literal(1)));
var outSubsetInExpr = OutPermsSubsetInPerms(domain, inVars, pendingAsyncLinearParams.Union(outVars));
linearityChecks.Add(new LinearityCheck(
exactlyOnePA,
outSubsetInExpr,
$"Potential linearity violation in outputs and pending async of {pendingAsync.proc.Name} for domain {domain.domainName}.",
$"single_{pendingAsync.proc.Name}"));
// Third kind
// If there are two identical pending asyncs, then their input permissions mut be empty.
var twoIdenticalPAs = Expr.And(
ExprHelper.FunctionCall(pendingAsync.pendingAsyncCtor.membership, pa1),
Expr.Ge(Expr.Select(PAs, pa1), Expr.Literal(2)));
var emptyPerms = OutPermsSubsetInPerms(domain, Enumerable.Empty<Expr>(), pendingAsyncLinearParams);
linearityChecks.Add(new LinearityCheck(
twoIdenticalPAs,
emptyPerms,
$"Potential linearity violation in identical pending asyncs of {pendingAsync.proc.Name} for domain {domain.domainName}.",
$"identical_{pendingAsync.proc.Name}"));
}
var pendingAsyncs = atomicAction.pendingAsyncs.ToList();
for (int i = 0; i < pendingAsyncs.Count; i++)
{
var pendingAsync1 = pendingAsyncs[i];
for (int j = i; j < pendingAsyncs.Count; j++)
{
var pendingAsync2 = pendingAsyncs[j];
var pendingAsyncLinearParams1 = PendingAsyncLinearParams(linearTypeChecker, domain, pendingAsync1, pa1);
var pendingAsyncLinearParams2 = PendingAsyncLinearParams(linearTypeChecker, domain, pendingAsync2, pa2);
if (pendingAsyncLinearParams1.Count == 0 || pendingAsyncLinearParams2.Count == 0) continue;
// Fourth kind
// Input permissions of two non-identical pending asyncs (possibly of the same action)
// are a subset of permissions in linear input variables.
var membership = Expr.And(
Expr.Neq(pa1, pa2),
Expr.And(
ExprHelper.FunctionCall(pendingAsync1.pendingAsyncCtor.membership, pa1),
ExprHelper.FunctionCall(pendingAsync2.pendingAsyncCtor.membership, pa2)));
var existing = Expr.And(
Expr.Ge(Expr.Select(PAs, pa1), Expr.Literal(1)),
Expr.Ge(Expr.Select(PAs, pa2), Expr.Literal(1)));
var noDuplication = OutPermsSubsetInPerms(domain, inVars, pendingAsyncLinearParams1.Union(pendingAsyncLinearParams2));
linearityChecks.Add(new LinearityCheck(
Expr.And(membership, existing),
noDuplication,
$"Potential lnearity violation in pending asyncs of {pendingAsync1.proc.Name} and {pendingAsync2.proc.Name} for domain {domain.domainName}.",
$"distinct_{pendingAsync1.proc.Name}_{pendingAsync2.proc.Name}"));
}
}
}
}
if (linearityChecks.Count == 0) return;
// Create checker blocks
List<Block> checkerBlocks = new List<Block>(linearityChecks.Count);
foreach (var lc in linearityChecks)
{
List<Cmd> cmds = new List<Cmd>(2);
if (lc.assume != null)
{
cmds.Add(CmdHelper.AssumeCmd(lc.assume));
}
cmds.Add(new AssertCmd(action.proc.tok, lc.assert) { ErrorData = lc.message });
var block = new Block(Token.NoToken, lc.name, cmds, CmdHelper.ReturnCmd);
CivlUtil.ResolveAndTypecheck(block, ResolutionContext.State.Two);
checkerBlocks.Add(block);
}
// Create init blocks
List<Block> blocks = new List<Block>(linearityChecks.Count + 1);
blocks.Add(
new Block(
Token.NoToken,
"init",
new List<Cmd> { CmdHelper.CallCmd(action.proc, inputs, outputs) },
new GotoCmd(Token.NoToken, checkerBlocks)));
blocks.AddRange(checkerBlocks);
// Create the whole check procedure
string checkerName = civlTypeChecker.AddNamePrefix($"LinearityChecker_{action.proc.Name}");
Procedure linCheckerProc = new Procedure(Token.NoToken, checkerName, new List<TypeVariable>(),
inputs, outputs, requires, action.proc.Modifies, new List<Ensures>());
Implementation linCheckImpl = new Implementation(Token.NoToken, checkerName,
new List<TypeVariable>(), inputs, outputs, locals, blocks);
linCheckImpl.Proc = linCheckerProc;
decls.Add(linCheckImpl);
decls.Add(linCheckerProc);
}
