Add SB Curated (copied from the smartbugs repository).

dataset/time_manipulation/lottopollo.sol

@@ -0,0 +1,33 @@
+/*
+ * @source: https://github.com/seresistvanandras/EthBench/blob/master/Benchmark/Simple/timestampdependent.sol
+ * @author: -
+ * @vulnerable_at_lines: 13,27
+ */
+
+pragma solidity ^0.4.0;
+contract lottopollo {
+  address leader;
+  uint    timestamp;
+  function payOut(uint rand) internal {
+    // <yes> <report> TIME MANIPULATION
+    if ( rand> 0 && now - rand > 24 hours ) {
+      msg.sender.send( msg.value );
+
+      if ( this.balance > 0 ) {
+        leader.send( this.balance );
+      }
+    }
+    else if ( msg.value >= 1 ether ) {
+      leader = msg.sender;
+      timestamp = rand;
+    }
+  }
+  function randomGen() constant returns (uint randomNumber) {
+      // <yes> <report> TIME MANIPULATION
+      return block.timestamp;   
+    }
+  function draw(uint seed){
+    uint randomNumber=randomGen(); 
+    payOut(randomNumber);
+  }
+}