Even better...

lib/collector.js

@@ -1,5 +1,5 @@
 const web3Utils = require('web3-utils')
-
+const limit = web3Utils.toBN(2).pow(web3Utils.toBN(236))
 /**
  * Writes data from the VM step to the in-memory
  * coverage map constructed by the Instrumenter.
@@ -22,6 +22,7 @@ class DataCollector {
     try {
       if (this.validOpcodes[info.opcode.name] && info.stack.length > 0){
         const idx = info.stack.length - 1;
+        if (info.stack[idx].lt(limit)) return;
         let hash = "0x" + info.stack[idx].toString(16,64);
         if(this.instrumentationData[hash]){
           this.instrumentationData[hash].hits++;