5 files changed, 28 insertions, 16 deletions
diff --git a/impl/Expression.hpp b/impl/Expression.hpp
index 00bc9cd..0d48d70 100644
--- a/impl/Expression.hpp
+++ b/impl/Expression.hpp
@@ -27,6 +27,10 @@ struct Expression {
     return NULL;
   }
 
+  virtual MaxExpression<Domain>* toMaxExpression() {
+    return NULL;
+  }
+
   virtual Domain eval(const VariableAssignment<Domain>&) const = 0;
   virtual Domain eval(const VariableAssignment<Domain>& rho,
                       const MaxStrategy<Domain>&) const {
@@ -145,6 +149,10 @@ struct MaxExpression : public OperatorExpression<Domain> {
   MaxExpression(const unsigned int& id, const Maximum<Domain>& op, const std::vector<Expression<Domain>*>& arguments)
     : OperatorExpression<Domain>(op, arguments), _id(id) { }
 
+  MaxExpression* toMaxExpression() {
+    return this;
+  }
+
   const MaxExpression* toMaxExpression() const {
     return this;
   }
diff --git a/impl/VariableAssignment.hpp b/impl/VariableAssignment.hpp
index ae5efd7..a9247b5 100644
--- a/impl/VariableAssignment.hpp
+++ b/impl/VariableAssignment.hpp
@@ -38,8 +38,16 @@ struct DynamicVariableAssignment : public VariableAssignment<Domain> {
     if (_stable.contains(x)) {
       _stable.remove(x);
       _values[x] = infinity<Domain>();
-      
-      solve(x);
+     
+      IdSet<Variable<Domain> > infl = _influence[x];
+      _influence[x].clear();
+      for (typename IdSet<Variable<Domain> >::iterator
+	     it = infl.begin(),
+	     ei = infl.end();
+	   it != ei;
+	   ++it) {
+	invalidate(_system.variable(*it));
+      }
     }
   }
 
diff --git a/impl/gmon.out b/impl/gmon.out
index aff812c..f33c245 100644
--- a/impl/gmon.out
+++ b/impl/gmon.out
diff --git a/impl/systems/gmon.out b/impl/systems/gmon.out
index 3240978..b5abe0e 100644
--- a/impl/systems/gmon.out
+++ b/impl/systems/gmon.out
diff --git a/impl/systems/test.eqns b/impl/systems/test.eqns
index fb23f1e..af18a57 100644
--- a/impl/systems/test.eqns
+++ b/impl/systems/test.eqns
@@ -1,16 +1,12 @@
 i-4[0] = max(-inf, 0)
-neg-i4[0] = max(-inf, 0)
-neg-i1-pre = max(-inf, guard(add(min(neg-i4[0], inf), min(i-4[0], inf)), 0, neg-i4[0]), guard(add(min(neg-i2-pre, inf), min(i-2-pre, inf)), 0, neg-i2-pre))
-i-1-pre = max(-inf, guard(add(min(neg-i4[0], inf), min(i-4[0], inf)), 0, i-4[0]), guard(add(min(neg-i2-pre, inf), min(i-2-pre, inf)), 0, i-2-pre))
-neg-i3-pre = max(-inf, guard(add(min(neg-i1-pre, inf), min(i-1-pre, 2)), 0, neg-i1-pre))
-i-3-pre = max(-inf, guard(add(min(neg-i1-pre, inf), min(i-1-pre, 2)), 0, min(2, i-1-pre)))
-neg-i0-pre = max(-inf, guard(add(min(neg-i1-pre, -3), min(i-1-pre, inf)), 0, min(-3, neg-i1-pre)))
-i-0-pre = max(-inf, guard(add(min(neg-i1-pre, -3), min(i-1-pre, inf)), 0, i-1-pre))
+negi-4[0] = max(-inf, 0)
+negi-1-pre = max(-inf, guard(add(min(negi-4[0], inf), min(i-4[0], inf)), 0, negi-4[0]), guard(add(min(negi-2-pre, inf), min(i-2-pre, inf)), 0, negi-2-pre))
+i-1-pre = max(-inf, guard(add(min(negi-4[0], inf), min(i-4[0], inf)), 0, i-4[0]), guard(add(min(negi-2-pre, inf), min(i-2-pre, inf)), 0, i-2-pre))
+negi-3-pre = max(-inf, guard(add(min(negi-1-pre, inf), min(i-1-pre, 2)), 0, negi-1-pre))
+i-3-pre = max(-inf, guard(add(min(negi-1-pre, inf), min(i-1-pre, 2)), 0, min(2, i-1-pre)))
+negi-0-pre = max(-inf, guard(add(min(negi-1-pre, -3), min(i-1-pre, inf)), 0, min(-3, negi-1-pre)))
+i-0-pre = max(-inf, guard(add(min(negi-1-pre, -3), min(i-1-pre, inf)), 0, i-1-pre))
 i-3[0] = max(-inf, add(0, i-3-pre))
-neg-i3[0] = max(-inf, add(0, neg-i3-pre))
-neg-i2-pre = max(-inf, guard(add(min(neg-i3[0], inf), min(i-3[0], inf)), 0, neg-i3[0]))
-i-2-pre = max(-inf, guard(add(min(neg-i3[0], inf), min(i-3[0], inf)), 0, i-3[0]))
-x = max(-inf, 0)
-y = max(-inf, x, z)
-z = max(-inf, y)
-
+negi-3[0] = max(-inf, add(0, negi-3-pre))
+negi-2-pre = max(-inf, guard(add(min(negi-3[0], inf), min(i-3[0], inf)), 0, negi-3[0]))
+i-2-pre = max(-inf, guard(add(min(negi-3[0], inf), min(i-3[0], inf)), 0, i-3[0]))