| 32 | } |
| 33 | |
| 34 | void DeepPolyAbsoluteValueElement::execute( |
| 35 | const Map<unsigned, DeepPolyElement *> &deepPolyElementsBefore ) |
| 36 | { |
| 37 | log( "Executing..." ); |
| 38 | ASSERT( hasPredecessor() ); |
| 39 | allocateMemory(); |
| 40 | |
| 41 | // Update the symbolic and concrete upper- and lower- bounds |
| 42 | // of each neuron |
| 43 | for ( unsigned i = 0; i < _size; ++i ) |
| 44 | { |
| 45 | NeuronIndex sourceIndex = *( _layer->getActivationSources( i ).begin() ); |
| 46 | DeepPolyElement *predecessor = deepPolyElementsBefore[sourceIndex._layer]; |
| 47 | double sourceLb = predecessor->getLowerBound( sourceIndex._neuron ); |
| 48 | double sourceUb = predecessor->getUpperBound( sourceIndex._neuron ); |
| 49 | |
| 50 | if ( !FloatUtils::isNegative( sourceLb ) ) |
| 51 | { |
| 52 | // Phase active |
| 53 | // Symbolic bound: x_b <= x_f <= x_b |
| 54 | // Concrete bound: lb_b <= x_f <= ub_b |
| 55 | _symbolicUb[i] = 1; |
| 56 | _symbolicUpperBias[i] = 0; |
| 57 | _ub[i] = sourceUb; |
| 58 | |
| 59 | _symbolicLb[i] = 1; |
| 60 | _symbolicLowerBias[i] = 0; |
| 61 | _lb[i] = sourceLb; |
| 62 | } |
| 63 | else if ( !FloatUtils::isPositive( sourceUb ) ) |
| 64 | { |
| 65 | // Phase inactive |
| 66 | // Symbolic bound: -x_b <= x_f <= -x_b |
| 67 | // Concrete bound: -ub_b <= x_f <= -lb_b |
| 68 | _symbolicUb[i] = -1; |
| 69 | _symbolicUpperBias[i] = 0; |
| 70 | _ub[i] = -sourceLb; |
| 71 | |
| 72 | _symbolicLb[i] = -1; |
| 73 | _symbolicLowerBias[i] = 0; |
| 74 | _lb[i] = -sourceUb; |
| 75 | } |
| 76 | else |
| 77 | { |
| 78 | // AbsoluteValue not fixed |
| 79 | // Naive concretization: 0 <= x_f <= max(-lb, ub) |
| 80 | _symbolicUb[i] = 0; |
| 81 | double upperBound = FloatUtils::max( -sourceLb, sourceUb ); |
| 82 | _symbolicUpperBias[i] = upperBound; |
| 83 | _ub[i] = upperBound; |
| 84 | |
| 85 | _symbolicLb[i] = 0; |
| 86 | _symbolicLowerBias[i] = 0; |
| 87 | _lb[i] = 0; |
| 88 | } |
| 89 | log( Stringf( "Neuron%u LB: %f b + %f, UB: %f b + %f", |
| 90 | i, |
| 91 | _symbolicLb[i], |
nothing calls this directly
no test coverage detected