public override LPSTerm[] EvaluateSymbolic(LPSState state, LPSTerm[] input)
{
if (!symbolic_output_storage.IsValueCreated)
{
symbolic_output_storage.Value = default(NumInstLPSTermArr).CreateVector(OutputDimension);
}
Evaluate <NumInstLPSTermArr, LPSTerm, LPSTerm[]>(input, symbolic_output_storage.Value);
return(symbolic_output_storage.Value);
}
private LPSTerm doInnerProduct(LPSState state, LPSTerm[] vs, Vector <double> ds)
{
LPSTerm result = LPSTerm.Const(0.0);
for (int i = 0; i < vs.Length; i++)
{
result.AddMul(vs[i], ds[i]);
}
return(result);
}
public override LPSTerm[] EvaluateSymbolic(LPSState state, LPSTerm[] input)
{
LPSTerm[] output = new LPSTerm[OutputDimension];
for (int i = 0; i < OutputDimension; i++)
{
output[i] = doInnerProduct(state, input, weightMatrixRows_[i]);
output[i].Add(interceptVector_[i]);
}
return(output);
}
public LPSTerm[] EvaluateNNSymbolicPostCrop(LPSState state, LPSTerm[] input)
{
var v = input;
for (int i = 0; i < LayerCount; i++)
{
Layer curr = Layers[i];
var stopwatch = new Stopwatch();
stopwatch.Start();
var w = curr.EvaluateSymbolic(state, v);
stopwatch.Stop();
v = w;
Console.WriteLine("Symbolic interpreter: layer index: {0,2}, elapsed milliseconds = {1}", curr.Index, stopwatch.ElapsedMilliseconds);
}
return(v);
}
public override LPSTerm[] EvaluateSymbolic(LPSState state, LPSTerm[] input)
{
LPSTerm[] cur = default(NumInstLPSTermArr).CreateVector(input.Length);
// If we have a meanImage ...
if (meanImage_ != null)
{
for (int i = 0; i < input.Length; i++)
{
cur[i].Sub(LPSTerm.Const(meanImage_[i])); // - mean
cur[i].Add(input[i]); // + input
cur[i].Mul(scale_);
}
return(cur);
}
// If we have a meanChannel ...
if (meanChannel_ != null && meanChannel_.Count() > 0)
{
for (int channel = 0; channel < InputCoordinates.ChannelCount; channel++)
{
for (int r = 0; r < InputCoordinates.RowCount; r++)
{
for (int c = 0; c < InputCoordinates.ColumnCount; c++)
{
int index = InputCoordinates.GetIndex(channel, r, c);
cur[index].Sub(LPSTerm.Const(meanChannel_[channel]));
cur[index].Add(input[index]);
cur[index].Mul(scale_);
}
}
}
return(cur);
}
// Finally, if we are only doing scaling ...
for (int i = 0; i < input.Length; i++)
{
cur[i].Add(input[i]);
cur[i].Mul(scale_);
}
return(cur);
}
public override LPSTerm ApplyKernelSymbolic(LPSState state, LPSTerm[] input, int outIndex, int channel, int row, int column)
{
int[] selections = state.Instrumentation[Index].Selections;
int maxIndex = selections[outIndex];
LPSTerm maxInput = input[maxIndex];
for (int i = 0; i < KernelDimension; i++)
{
for (int j = 0; j < KernelDimension; j++)
{
int x = row - Padding + i;
int y = column - Padding + j;
if (x >= InputCoordinates.RowCount || y >= InputCoordinates.ColumnCount)
{
continue;
}
int curIndex = InputCoordinates.GetIndex(channel, x, y);
if (curIndex == maxIndex)
{
continue;
}
if (curIndex < 0 || curIndex >= input.Length)
{
continue;
}
// maxInput - input[curIndex] >= 0
LPSTerm t = LPSTerm.Const(0.0);
t.Add(maxInput);
t.AddMul(input[curIndex], -1.0);
state.DeferredCts.And(t, InequalityType.GE);
}
}
return(maxInput);
}
public override LPSTerm[] EvaluateSymbolic(LPSState state, LPSTerm[] input)
{
DisjunctionChoice[] disjunctionChoices = state.Instrumentation[Index].DisjunctionConstraints;
Debug.Assert(InputDimension == disjunctionChoices.Length);
LPSTerm[] output = new LPSTerm[OutputDimension];
Random r = new Random(System.DateTime.Now.Millisecond);
// int uncertain = 0;
for (int i = 0; i < OutputDimension; i++)
{
switch (disjunctionChoices[i])
{
case DisjunctionChoice.ACTIVE:
output[i] = input[i];
// If we are supposed to do sampling
if (Utils.RobustnessOptions.LiveConstraintSamplingRatio != 1.0)
{
// Console.WriteLine("Sampling!");
// if we are above threshold defer
if (r.Next(0, 100) > (int)Utils.RobustnessOptions.LiveConstraintSamplingRatio * 100)
{
state.DeferredCts.And(input[i], InequalityType.GE);
}
else
{
state.CurrentCts.And(input[i], InequalityType.GE);
}
}
else
{
state.CurrentCts.And(input[i], InequalityType.GE);
}
break;
case DisjunctionChoice.INACTIVE:
output[i] = LPSTerm.Const(0.0);
// CEGAR version: defer 'dead' constraint
state.DeferredCts.And(input[i], InequalityType.LT);
// Original version
// state.CurrentCts.And(input[i],InequalityType.LT);
break;
default:
throw new Exception("Invalid disjunction choice type!");
}
/* This is more of an experiment really ...
* if (IsActivationWobbly(input[i], state.Origin))
* {
* uncertain++;
* // Mutate state to have new disjunction choices to explore in the future
* disjunctionChoices[i] = Instrumentation.FlipDisjunctionChoice(disjunctionChoices[i]);
* }
*/
}
// Console.WriteLine("** Ultra-sensitive ReLU activations {0}/{1}", uncertain, OutputDimension);
return(output);
}
public override LPSTerm ApplyKernelSymbolic(LPSState state, LPSTerm[] input, int outIndex, int channel, int row, int column)
{
return(ApplyKernel <NumInstLPSTermArr, LPSTerm, LPSTerm[]>(input, channel, row, column));
}
public abstract LPSTerm ApplyKernelSymbolic(LPSState state, LPSTerm[] input, int outIndex, int channel, int row, int column);
public override LPSTerm[] EvaluateSymbolic(LPSState state, LPSTerm[] input)
{
return(ApplyKernels <NumInstLPSTermArr, LPSTerm, LPSTerm[], LPSState>(state, ApplyKernelSymbolic, input));
}
public abstract LPSTerm[] EvaluateSymbolic(LPSState state, LPSTerm[] input);
