--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/gov/nasa/jpf/util/ExpGrowth.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2014, United States Government, as represented by the
+ * Administrator of the National Aeronautics and Space Administration.
+ * All rights reserved.
+ *
+ * The Java Pathfinder core (jpf-core) platform is licensed under the
+ * Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0. 
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+package gov.nasa.jpf.util;
+
+public class ExpGrowth implements Growth {
+  final float factor;
+  final float sqFactor;
+  final int plus;
+  
+  public ExpGrowth(float factor, int plus) {
+    if (factor < 1.001F || factor > 100.F) {
+      throw new IllegalArgumentException();
+    }
+    this.factor = factor;
+    this.sqFactor = (float) Math.sqrt(factor);
+    this.plus = plus;
+  }
+  
+  public ExpGrowth(float factor) {
+    this(factor,7);
+  }
+  
+  @Override
+  public int grow(int oldSize, int minNewSize) {
+    int newSize = (int)(factor * oldSize) + plus;
+    if (newSize < minNewSize) {
+      newSize = (int)(sqFactor * minNewSize) + plus;
+    }
+    return newSize;
+  }
+}