diff --git a/test/vmLogTestFiller.json b/test/vmLogTestFiller.json
index fbf206283..f4fb48b52 100644
--- a/test/vmLogTestFiller.json
+++ b/test/vmLogTestFiller.json
@@ -1,5 +1,5 @@
 {
-    "log0": {
+    "log0_emptyMem": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -27,7 +27,7 @@
         }
     },
 
-    "log1": {
+    "log0_nonEmptyMem": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -40,7 +40,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ (LOG1 0 0 (CALLER)) }",
+            "code" : "{ (MSTORE 0 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) (LOG0 0 32) }",
             "storage": {}
         }
         },
@@ -55,7 +55,7 @@
         }
     },
 
-    "log2": {
+    "log0_nonEmptyMem_logMemSize1": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -68,7 +68,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ (LOG2 0 0 (CALLER) (ADDRESS)) }",
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG0 0 1) }",
             "storage": {}
         }
         },
@@ -83,7 +83,1160 @@
         }
     },
 
-    "log2_1": {
+
+    "log0_nonEmptyMem_logMemSize1_logMemStart31": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG0 31 1) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log0_logMemStartTooHigh": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG0 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 1) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log0_logMemsizeTooHigh": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG0 1 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log0_logMemsizeZero": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG0 1 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log1_emptyMem": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (LOG1 0 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log1_nonEmptyMem": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) (LOG1 0 32 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log1_nonEmptyMem_logMemSize1": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG1 0 1 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+
+    "log1_nonEmptyMem_logMemSize1_logMemStart31": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG1 31 1 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log1_logMemStartTooHigh": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG1 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 1 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log1_logMemsizeTooHigh": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG1 1 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log1_logMemsizeZero": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG1 1 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log1_MaxTopic": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG1 0 32 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log1_Caller": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE8 0 0xff) (LOG1 0 32 (CALLER)) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log2_emptyMem": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (LOG2 0 0 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log2_nonEmptyMem": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) (LOG2 0 32 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log2_nonEmptyMem_logMemSize1": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG2 0 1 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+
+    "log2_nonEmptyMem_logMemSize1_logMemStart31": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
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+        "currentTimestamp" : 1,
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+    "log4_nonEmptyMem_logMemSize1": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG4 0 1 0 0 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+
+    "log4_nonEmptyMem_logMemSize1_logMemStart31": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG4 31 1 0 0 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log4_logMemStartTooHigh": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG4 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 1 0 0 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log4_logMemsizeTooHigh": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG4 1 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0 0 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log4_logMemsizeZero": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG4 1 0 0 0 0 0) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log4_MaxTopic": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE 0 0xaabbffffffffffffffffffffffffffffffffffffffffffffffffffffffffccdd) (LOG4 0 32 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log4_Caller": {
+        "env" : {
+        "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+        "currentNumber" : "0",
+        "currentGasLimit" : "1000000",
+        "currentDifficulty" : "256",
+        "currentTimestamp" : 1,
+        "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+        },
+        "pre" : {
+        "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
+            "balance" : "1000000000000000000",
+            "nonce" : 0,
+            "code" : "{ (MSTORE8 0 0xff) (LOG3 0 32 0 0 0 (CALLER) ) }",
+            "storage": {}
+        }
+        },
+        "exec" : {
+            "address" : "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6",
+            "origin" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "caller" : "cd1722f3947def4cf144679da39c4c32bdc35681",
+            "value" : "1000000000000000000",
+            "data" : "",
+            "gasPrice" : "100000000000000",
+            "gas" : "10000"
+        }
+    },
+
+    "log4_PC": {
         "env" : {
         "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
         "currentNumber" : "0",
@@ -96,7 +1249,7 @@
         "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6" : {
             "balance" : "1000000000000000000",
             "nonce" : 0,
-            "code" : "{ (LOG2 0 0 (CALLER) 23) }",
+            "code" : "{ (MSTORE8 0 0xff) (LOG3 0 32 (PC) (PC) (PC) (PC) ) }",
             "storage": {}
         }
         },