Add new features

mythril/analysis/symbolic.py

@@ -24,6 +24,7 @@ from mythril.laser.plugin.plugins import (
     MutationPrunerBuilder,
     DependencyPrunerBuilder,
     CoveragePluginBuilder,
+    CoverageMetricsPluginBuilder,
     CallDepthLimitBuilder,
     InstructionProfilerBuilder,
     SymbolicSummaryPluginBuilder,
@@ -143,6 +144,7 @@ class SymExecWrapper:
             )
 
         plugin_loader = LaserPluginLoader()
+        plugin_loader.load(CoverageMetricsPluginBuilder())
         if not args.disable_coverage_strategy:
             plugin_loader.load(CoveragePluginBuilder())
         if not args.disable_mutation_pruner:

mythril/concolic/concolic_execution.py

@@ -74,7 +74,6 @@ def concolic_execution(
     :param solver_timeout: Solver timeout
 
     """
-
     init_state, trace = concrete_execution(concrete_data)
     args.solver_timeout = solver_timeout
     output_list = flip_branches(

mythril/concolic/find_trace.py

@@ -12,11 +12,13 @@ from mythril.laser.ethereum.svm import LaserEVM
 from mythril.laser.ethereum.state.world_state import WorldState
 from mythril.laser.ethereum.state.account import Account
 from mythril.laser.ethereum.time_handler import time_handler
+from mythril.laser.plugin.plugins import TraceFinderBuilder
 from mythril.laser.ethereum.transaction.concolic import execute_transaction
 from mythril.laser.plugin.loader import LaserPluginLoader
 from mythril.laser.smt import Expression, BitVec, symbol_factory
 from mythril.laser.ethereum.transaction.transaction_models import tx_id_manager
 from mythril.plugin.discovery import PluginDiscovery
+from mythril.support.support_args import args
 
 
 def setup_concrete_initial_state(concrete_data: ConcreteData) -> WorldState:
@@ -30,12 +32,11 @@ def setup_concrete_initial_state(concrete_data: ConcreteData) -> WorldState:
         account = Account(address, concrete_storage=True)
         account.code = Disassembly(details["code"][2:])
         account.nonce = details["nonce"]
-        if isinstance(type(details["storage"]), str):
+        if isinstance(details["storage"], str):
             details["storage"] = eval(details["storage"])  # type: ignore
         for key, value in details["storage"].items():
             key_bitvec = symbol_factory.BitVecVal(int(key, 16), 256)
             account.storage[key_bitvec] = symbol_factory.BitVecVal(int(value, 16), 256)
-
         world_state.put_account(account)
         account.set_balance(int(details["balance"], 16))
     return world_state
@@ -47,16 +48,15 @@ def concrete_execution(concrete_data: ConcreteData) -> Tuple[WorldState, List]:
     :param concrete_data: Concrete data
     :return: path trace
     """
+    args.pruning_factor = 1
     tx_id_manager.restart_counter()
     init_state = setup_concrete_initial_state(concrete_data)
     laser_evm = LaserEVM(execution_timeout=1000)
     laser_evm.open_states = [deepcopy(init_state)]
     plugin_loader = LaserPluginLoader()
-    assert PluginDiscovery().is_installed("myth_concolic_execution")
+    plugin_loader.load(TraceFinderBuilder())
-    trace_plugin = PluginDiscovery().installed_plugins["myth_concolic_execution"]()
     time_handler.start_execution(laser_evm.execution_timeout)
 
-    plugin_loader.load(trace_plugin)
     laser_evm.time = datetime.now()
     plugin_loader.instrument_virtual_machine(laser_evm, None)
     for transaction in concrete_data["steps"]:

mythril/interfaces/cli.py

@@ -300,7 +300,6 @@ def main() -> None:
     )
     create_disassemble_parser(disassemble_parser)
 
-    if PluginDiscovery().is_installed("myth_concolic_execution"):
     concolic_parser = subparsers.add_parser(
         CONCOLIC_LIST[0],
         help="Runs concolic execution to flip the desired branches",

mythril/laser/plugin/plugins/__init__.py

@@ -12,3 +12,5 @@ from mythril.laser.plugin.plugins.mutation_pruner import MutationPrunerBuilder
 from mythril.laser.plugin.plugins.call_depth_limiter import CallDepthLimitBuilder
 from mythril.laser.plugin.plugins.instruction_profiler import InstructionProfilerBuilder
 from mythril.laser.plugin.plugins.summary import SymbolicSummaryPluginBuilder
+from mythril.laser.plugin.plugins.trace import TraceFinderBuilder
+from mythril.laser.plugin.plugins.coverage_metrics import CoverageMetricsPluginBuilder

mythril/laser/plugin/plugins/coverage_metrics/__init__.py

@@ -0,0 +1 @@
+from .metrics_plugin import CoverageMetricsPluginBuilder

mythril/laser/plugin/plugins/coverage_metrics/constants.py

@@ -0,0 +1 @@
+BATCH_OF_STATES = 5

mythril/laser/plugin/plugins/coverage_metrics/coverage_data.py

@@ -0,0 +1,73 @@
+import json
+from typing import Dict, List
+
+from mythril.support.support_utils import get_code_hash
+from mythril.laser.execution_info import ExecutionInfo
+
+
+class InstructionCoverageInfo(ExecutionInfo):
+    def __init__(self):
+        self._instruction_coverage = {}  # type: Dict[str, int]
+
+    def as_dict(self):
+        return dict(instruction_discovery_time=self._instruction_coverage)
+
+    def get_code_instr_hex(self, code: str, instruction: int):
+        code_hash = get_code_hash(code)[2:]
+        instruction_hex = hex(instruction)[2:]
+        return "{}:{}".format(code_hash, instruction_hex)
+
+    def is_covered(self, code: str, instruction: int):
+        code_instr_hex = self.get_code_instr_hex(code, instruction)
+        return code_instr_hex in self._instruction_coverage
+
+    def add_data(self, code: str, instruction: int, discovery_time: int):
+        code_instr_hex = self.get_code_instr_hex(code, instruction)
+        self._instruction_coverage[code_instr_hex] = discovery_time
+
+    def output(self, filename: str):
+        with open(filename, "w") as outfile:
+            json.dump(
+                self._instruction_coverage, default=lambda o: o.__dict__, fp=outfile
+            )
+
+
+class CoverageData:
+    def __init__(
+        self,
+        instructions_covered: int,
+        total_instructions: int,
+        branches_covered: int,
+        tx_id: int,
+        total_branches: int,
+        state_counter: int,
+        code: str,
+        time_elapsed: int,
+    ):
+        self.instructions_covered = instructions_covered
+        self.total_instructions = total_instructions
+        self.branches_covered = branches_covered
+        self.tx_id = tx_id
+        self.total_branches = total_branches
+        self.state_counter = state_counter
+        self.code_hash = get_code_hash(code)[2:]
+        self.time_elapsed = time_elapsed
+
+    def as_dict(self):
+        return self.__dict__
+
+
+class CoverageTimeSeries(ExecutionInfo):
+    def __init__(self):
+        self.coverage = []  # type: List[CoverageData]
+
+    def output(self, filename: str):
+        with open(filename, "w") as outfile:
+            json.dump(self.coverage, default=lambda o: o.__dict__, fp=outfile)
+
+    def as_dict(self):
+        return dict(coverage=self.coverage)
+
+    def add_data(self, *args, **kwargs):
+        cov_data = CoverageData(*args, **kwargs)
+        self.coverage.append(cov_data.as_dict())

mythril/laser/plugin/plugins/coverage_metrics/metrics_plugin.py

@@ -0,0 +1,131 @@
+from mythril.laser.ethereum.svm import LaserEVM
+from mythril.laser.plugin.interface import LaserPlugin
+from mythril.laser.plugin.builder import PluginBuilder
+from mythril.laser.ethereum.state.global_state import GlobalState
+from .coverage_data import (
+    CoverageTimeSeries,
+    InstructionCoverageInfo,
+)
+from .constants import BATCH_OF_STATES
+from typing import Dict, Tuple, List
+
+import time
+import logging
+
+log = logging.getLogger(__name__)
+
+
+class CoverageMetricsPluginBuilder(PluginBuilder):
+    """CoveragePlugin
+    Checks Instruction and branch coverage and puts it to data.json file
+    which appears in the directory in which mythril is run.
+    """
+
+    plugin_default_enabled = True
+    enabled = True
+
+    author = "MythX Development Team"
+    plugin_name = "MythX Coverage Metrics"
+    plugin_license = "All rights reserved."
+    plugin_type = "Laser Plugin"
+    plugin_description = (
+        "This plugin measures coverage throughout symbolic execution,"
+        " reporting it at the end in the MythX coverage format."
+    )
+
+    def __call__(self, *args, **kwargs):
+        """Constructs the plugin"""
+        return LaserCoveragePlugin()
+
+
+class LaserCoveragePlugin(LaserPlugin):
+    def __init__(self):
+        self.instruction_coverage_data = {}  # type: Dict[str, Tuple[int, Dict[bool]]]
+        self.branch_possibilities = {}  # type: Dict[str, Dict[int, List]]
+        self.tx_id = 0
+        self.state_counter = 0
+        self.coverage = CoverageTimeSeries()
+        self.instruction_coverage_info = InstructionCoverageInfo()
+        self.start_time = time.time_ns()
+
+    def initialize(self, symbolic_vm: LaserEVM) -> None:
+        """Initializes the instruction coverage plugin
+
+        Introduces hooks for each instruction
+        :param symbolic_vm: The symbolic virtual machine to initialise  this plugin for
+        """
+        log.info("Initializing coverage metrics plugin")
+
+        self.instruction_coverage_data = {}
+        self.branch_possibilities = {}
+        self.tx_id = 0
+
+        # Add the instruction coverage ExecutionInfo to laser vm for use in reporting
+        symbolic_vm.execution_info.append(self.instruction_coverage_info)
+        symbolic_vm.execution_info.append(self.coverage)
+
+        @symbolic_vm.laser_hook("execute_state")
+        def execute_state_hook(global_state: GlobalState):
+            self._update_instruction_coverage_data(global_state)
+            self._update_branch_coverage_data(global_state)
+            self.state_counter += 1
+            if self.state_counter == BATCH_OF_STATES:
+                self._record_coverage()
+                self.state_counter = 0
+
+        @symbolic_vm.laser_hook("stop_sym_trans")
+        def execute_stop_sym_trans_hook():
+            self.tx_id += 1
+
+        # The following is useful for debugging
+        # @symbolic_vm.laser_hook("stop_sym_exec")
+        # def execute_stop_sym_exec_hook():
+        #     self.coverage.output("coverage_data.json")
+        #     self.instruction_coverage_info.output("instruction_discovery_data.json")
+
+    def _update_instruction_coverage_data(self, global_state: GlobalState):
+        """Records instruction coverage"""
+        code = global_state.environment.code.bytecode
+        if code not in self.instruction_coverage_data.keys():
+            number_of_instructions = len(global_state.environment.code.instruction_list)
+            self.instruction_coverage_data[code] = (number_of_instructions, {})
+        current_instr = global_state.get_current_instruction()["address"]
+        if self.instruction_coverage_info.is_covered(code, current_instr) is False:
+            self.instruction_coverage_info.add_data(
+                code, current_instr, time.time_ns() - self.start_time
+            )
+        self.instruction_coverage_data[code][1][current_instr] = True
+
+    def _update_branch_coverage_data(self, global_state: GlobalState):
+        """Records branch coverage"""
+        code = global_state.environment.code.bytecode
+        if code not in self.branch_possibilities:
+            self.branch_possibilities[code] = {}
+
+        if global_state.get_current_instruction()["opcode"] != "JUMPI":
+            return
+        addr = global_state.get_current_instruction()["address"]
+        jump_addr = global_state.mstate.stack[-1]
+        if jump_addr.symbolic:
+            log.debug("Encountered a symbolic jump, ignoring it for branch coverage")
+            return
+        self.branch_possibilities[code][addr] = [addr + 1, jump_addr.value]
+
+    def _record_coverage(self):
+        for code, code_cov in self.instruction_coverage_data.items():
+            total_branches = 0
+            branches_covered = 0
+            for jumps, branches in self.branch_possibilities[code].items():
+                for branch in branches:
+                    total_branches += 1
+                    branches_covered += branch in code_cov[1]
+            self.coverage.add_data(
+                code=code,
+                instructions_covered=len(code_cov[1]),
+                total_instructions=code_cov[0],
+                branches_covered=branches_covered,
+                tx_id=self.tx_id,
+                total_branches=total_branches,
+                state_counter=self.state_counter,
+                time_elapsed=time.time_ns() - self.start_time,
+            )

mythril/laser/plugin/plugins/trace.py

@@ -0,0 +1,48 @@
+from mythril.laser.plugin.interface import LaserPlugin
+from mythril.laser.plugin.builder import PluginBuilder
+from mythril.laser.ethereum.state.global_state import GlobalState
+from mythril.laser.ethereum.svm import LaserEVM
+from typing import List, Tuple
+
+
+class TraceFinderBuilder(PluginBuilder):
+    name = "trace-finder"
+    plugin_default_enabled = True
+    enabled = True
+
+    author = "MythX Development Team"
+    name = "MythX Trace Finder"
+    plugin_license = "All rights reserved."
+    plugin_type = "Laser Plugin"
+    plugin_version = "0.0.1 "
+    plugin_description = "This plugin merges states after the end of a transaction"
+
+    def __call__(self, *args, **kwargs):
+        return TraceFinder()
+
+
+class TraceFinder(LaserPlugin):
+    def __init__(self):
+        self._reset()
+
+    def _reset(self):
+        self.tx_trace: List[List[Tuple[int, str]]] = []
+
+    def initialize(self, symbolic_vm: LaserEVM):
+        """Initializes Trace Finder
+
+        Introduces hooks during the start of the execution and each execution state
+        :param symbolic_vm:
+        :return:
+        """
+        self._reset()
+
+        @symbolic_vm.laser_hook("start_exec")
+        def start_sym_trans_hook():
+            self.tx_trace.append([])
+
+        @symbolic_vm.laser_hook("execute_state")
+        def trace_jumpi_hook(global_state: GlobalState):
+            self.tx_trace[-1].append(
+                (global_state.mstate.pc, global_state.current_transaction.id)
+            )

tests/concolic/concolic_tests.py

@@ -0,0 +1,240 @@
+import binascii
+import json
+import pathlib
+import pytest
+import subprocess
+
+from copy import deepcopy
+from datetime import datetime
+from mock import patch
+from subprocess import check_output, CalledProcessError
+from tests import BaseTestCase, PROJECT_DIR, TESTDATA
+
+from mythril.concolic import concrete_execution
+from mythril.concolic.find_trace import setup_concrete_initial_state
+from mythril.disassembler.asm import disassemble
+from mythril.concolic.concrete_data import ConcreteData
+from mythril.laser.ethereum import util
+
+from mythril.disassembler.disassembly import Disassembly
+from mythril.laser.ethereum.svm import LaserEVM
+from mythril.laser.ethereum.state.world_state import WorldState
+from mythril.laser.ethereum.state.account import Account
+from mythril.laser.ethereum.time_handler import time_handler
+from mythril.laser.ethereum.transaction.concolic import execute_transaction
+from mythril.laser.plugin.loader import LaserPluginLoader
+from mythril.laser.smt import Expression, BitVec, symbol_factory
+from mythril.laser.plugin.plugins import TraceFinderBuilder
+
+MYTH = str(PROJECT_DIR / "myth")
+
+
+def output_of(command):
+    try:
+        return json.loads(check_output(command, shell=True).decode("UTF-8"))
+    except CalledProcessError as exc:
+        return json.loads(exc.output.decode("UTF-8"))
+
+
+# TODO: Try using some python EVM for these tests
+
+
+def validate_simple_example(output, branches):
+    for branch_output, branch in zip(output, branches):
+        if branch == "153":
+            # Validation for initialState
+
+            # Validation for tx steps
+            tx_step = branch_output["steps"][1]
+            assert tx_step["input"] == tx_step["calldata"]
+            assert int(tx_step["input"][10:], 16) == 3
+
+
+def validate_multiple_example(output, branches):
+    for branch_output, branch in zip(output, branches):
+        if branch == "153":
+            # Validation for initialState
+
+            # Validation for tx steps
+            tx_step = branch_output["steps"][1]
+            assert tx_step["input"] == tx_step["calldata"]
+            assert int(tx_step["input"][10:], 16) == 3
+        elif branch == "192":
+            # Validation for initialState
+
+            # Validation for tx steps
+            tx_step = branch_output["steps"][1]
+            assert tx_step["input"] == tx_step["calldata"]
+            assert int(tx_step["input"][10:], 16) == 5
+        elif branch == "243":
+            # Validation for initialState
+
+            # Validation for tx steps
+            tx_step = branch_output["steps"][1]
+            assert tx_step["input"] == tx_step["calldata"]
+            assert int(tx_step["input"][10:], 16) == 7
+
+
+def validate_two_contract(output, branches):
+    for branch_output, branch in zip(output, branches):
+        if branch == "311":
+
+            # Validation for initialState
+            # Validation for tx steps
+            assert (
+                int(branch_output["steps"][1]["input"][10:], 16)
+                + int(branch_output["steps"][3]["input"][10:], 16)
+                == 11
+            )
+
+        if branch == "341":
+            # Validation for initialState
+
+            # Validation for tx steps
+            assert (
+                int(branch_output["steps"][1]["input"][10:], 16)
+                + int(branch_output["steps"][3]["input"][10:], 16)
+                == 30
+            )
+
+        if branch == "371":
+            # Validation for initialState
+
+            # Validation for tx steps
+            assert (
+                int(branch_output["steps"][1]["input"][10:], 16)
+                + int(branch_output["steps"][3]["input"][10:], 16)
+                == 20
+            )
+
+
+def validate_multi_contract(output, branches):
+    for branch_output, branch in zip(output, branches):
+        if branch == "453":
+            # Validation for initialState
+
+            # Validation for tx steps
+            assert (
+                int(branch_output["steps"][1]["input"][10:], 16)
+                + int(branch_output["steps"][3]["input"][10:], 16)
+                + int(branch_output["steps"][5]["input"][10:], 16)
+                == 10
+            )
+
+        if branch == "483":
+            # Validation for initialState
+
+            # Validation for tx steps
+            assert (
+                int(branch_output["steps"][1]["input"][10:], 16)
+                + int(branch_output["steps"][3]["input"][10:], 16)
+                + int(branch_output["steps"][5]["input"][10:], 16)
+                == 25
+            )
+
+
+validate_test_data = (
+    ("simple_example_input.json", validate_simple_example, "153"),
+    ("multiple_example_input.json", validate_multiple_example, "153,192,243"),
+    ("two_contract_input.json", validate_two_contract, "311,341,371"),
+    ("multi_contract_example_input.json", validate_multi_contract, "453,483"),
+)
+check_state_validity_test_data = (
+    ("simple_example_input.json", "153"),
+    ("multiple_example_input.json", "153,192,243"),
+    ("two_contract_input.json", "311,341,371"),
+    ("multi_contract_example_input.json", "453,483"),
+)
+
+test_data_error = (("simple_example_input.json", "508"),)
+
+
+@pytest.mark.parametrize("input_file,validate_function,branches", validate_test_data)
+def test_concolic_conditions(input_file, validate_function, branches):
+    input_path = str(TESTDATA / "concolic_io" / input_file)
+
+    command = f"{MYTH} concolic {input_path} --branches {branches}"
+    received_output = output_of(command)
+    branches = [branch for branch in branches.split(",")]
+    validate_function(received_output, branches)
+
+
+@pytest.mark.parametrize("input_file,branch", test_data_error)
+def test_concolic_error(input_file, branch):
+    input_path = str(TESTDATA / "concolic_io" / input_file)
+    command = f"{MYTH} concolic {input_path} --branches {branch}"
+    received_output = subprocess.run(
+        command.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE
+    )
+
+    assert (
+        f"The branch {branch} does not lead to a jump address, skipping this branch"
+        in received_output.stderr.decode("UTF-8")
+    )
+
+
+def get_pc_from_disassembler(concrete_data, branches):
+    init_state = setup_concrete_initial_state(concrete_data)
+    laser_evm = LaserEVM(execution_timeout=100)
+
+    laser_evm.open_states = [deepcopy(init_state)]
+    plugin_loader = LaserPluginLoader()
+    trace_plugin = TraceFinderBuilder()
+    plugin_loader.load(trace_plugin)
+    laser_evm.time = datetime.now()
+    plugin_loader.instrument_virtual_machine(laser_evm, None)
+
+    for transaction in concrete_data["steps"][:-1]:
+        execute_transaction(
+            laser_evm,
+            callee_address=transaction["address"],
+            caller_address=symbol_factory.BitVecVal(
+                int(transaction["origin"], 16), 256
+            ),
+            origin_address=symbol_factory.BitVecVal(
+                int(transaction["origin"], 16), 256
+            ),
+            gas_limit=int(transaction.get("gasLimit", "0x9999999999999999999999"), 16),
+            data=binascii.a2b_hex(transaction["input"][2:]),
+            gas_price=int(transaction.get("gasPrice", "0x773594000"), 16),
+            value=int(transaction["value"], 16),
+            track_gas=False,
+        )
+    contract_addr = concrete_data["steps"][-1]["address"]
+    assert len(laser_evm.open_states) == 1
+    instruction_list = (
+        laser_evm.open_states[0].accounts[int(contract_addr, 16)].code.instruction_list
+    )
+    branches = [
+        util.get_instruction_index(instruction_list, branch) for branch in branches
+    ]
+    return branches
+
+
+def run_concolic(input_path, output, branches):
+    with open(input_path) as f:
+        concrete_data = json.load(f)
+    _, input_trace = concrete_execution(concrete_data)
+    input_last_tx = input_trace[-1]
+    branches = [int(branch) for branch in branches.split(",")]
+    time_handler.start_execution(1000)
+    branches = get_pc_from_disassembler(concrete_data, branches)
+    for out, branch in zip(output, branches):
+        _, trace = concrete_execution(out)
+        last_tx = trace[-1]
+        tx_id = last_tx[0][1]
+        branch_idx = last_tx.index((branch, tx_id))
+        input_idx = input_last_tx.index((branch, tx_id))
+
+        assert (branch_idx == input_idx) and last_tx[branch_idx + 1][
+            0
+        ] != input_last_tx[branch_idx + 1][0]
+
+
+@pytest.mark.parametrize("input_file,branches", check_state_validity_test_data)
+def test_validate_concolic_output(input_file, branches):
+    input_path = str(TESTDATA / "concolic_io" / input_file)
+
+    command = f"{MYTH} concolic {input_path} --branches {branches}"
+    received_output = output_of(command)
+    run_concolic(input_path, received_output, branches)

tests/integration_tests/coverage_metrics_test.py

@@ -0,0 +1,19 @@
+import pytest
+
+from tests import PROJECT_DIR, TESTDATA
+from utils import output_of
+
+MYTH = str(PROJECT_DIR / "myth")
+
+
+test_data = [
+    (open(f"{TESTDATA}/inputs/coverage.sol.o").read(), True),
+]
+
+
+@pytest.mark.parametrize("code, exists", test_data)
+def test_basic_coverage(code, exists):
+    assert (
+        "instruction_discovery_time"
+        in output_of(f"{MYTH} a -c 0x{code} --solver-timeout 1000 -o jsonv2")
+    ) == exists

tests/testdata/concolic_io/multi_contract_example.sol

@@ -0,0 +1,54 @@
+pragma solidity 0.8.6;
+
+/**
+ * @title Storage
+ * @dev Store & retreive value in a variable
+ */
+contract D1 {
+
+    uint256 number;
+
+    function store(uint256 num) public {
+        number =num;
+    }
+    
+    function retval() public returns(uint256){
+        return number;
+    }
+}
+contract D2 {
+
+
+    uint256 number;
+
+    function store(uint256 num) external {
+        number = num;
+    }
+    function retval() public returns(uint256){
+        return number;
+    }
+
+}
+
+
+contract D3 {
+ D2 d2;
+ D1 d1;
+  constructor() public
+  {
+       d1 = D1(0x0901d12ebE1b195E5AA8748E62Bd7734aE19B51F);
+       d2 = D2(0x384f682f4a5AbefC8795Cc38a340dE9446dFAE7A);
+  }
+  function test(uint256 num) public returns(uint256) {
+    uint256 sum = d1.retval() + d2.retval() + num;
+    if (sum == 10) {
+        return sum + 10;
+    }
+    else if(sum == 25) {
+        return sum * 2;
+    }
+    else return sum*10;
+    return sum;
+  }
+}
+

tests/testdata/concolic_io/multi_contract_example_input.json

@@ -0,0 +1,108 @@
+{
+    "initialState": {
+        "accounts": {
+            "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe": {
+                "balance": "0x1000000",
+                "code": "",
+                "nonce": 0,
+                "storage": {}
+            },
+            "0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef": {
+                "balance": "0x0",
+                "code": "",
+                "nonce": 0,
+                "storage": {}
+            }
+        }
+    },
+    "steps": [{
+        "address": "",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "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",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    },
+    {
+        "address": "0x0901d12ebE1b195E5AA8748E62Bd7734aE19B51F",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x6057361d0000000000000000000000000000000000000000000000000000000000000001",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    },
+    {
+        "address": "",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "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",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    },
+    {
+        "address": "0x384f682f4a5AbefC8795Cc38a340dE9446dFAE7A",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x6057361d0000000000000000000000000000000000000000000000000000000000000001",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    },
+    {
+        "address": "",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "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",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    },
+    {
+        "address": "0xc538a4c3f414cbf7f78373e253c1beadd6310d45",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "0x29e99f070000000000000000000000000000000000000000000000000000000000000006",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x29e99f070000000000000000000000000000000000000000000000000000000000000006",
+        "name": "",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    }]
+}

tests/testdata/concolic_io/multiple_example.sol

@@ -0,0 +1,25 @@
+// source of the bytecode, as a reference for the test.
+pragma solidity 0.8.6;
+
+contract Example1 {
+    uint256 private initialized = 0;
+    uint256 public count = 1;
+
+    function init() public {
+        initialized = 1;
+    }
+
+    function run(uint256 input, uint val) public {
+        if (val == 3) {
+            count += input;
+        }
+        else if(val == 5) {
+            count += 2 * input;
+        }
+        else if(val == 7) {
+            count += 10 + input;
+        }
+        else
+            count++;
+    }
+}

tests/testdata/concolic_io/multiple_example_input.json

@@ -0,0 +1,48 @@
+{
+    "initialState": {
+        "accounts": {
+            "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe": {
+                "balance": "0x10000",
+                "code": "",
+                "nonce": 0,
+                "storage": {}
+            },
+            "0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef": {
+                "balance": "0x0",
+                "code": "",
+                "nonce": 0,
+                "storage": {}
+            }
+        }
+    },
+    "steps": [{
+        "address": "",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x6080604052600080556001805534801561001857600080fd5b50610349806100286000396000f3fe608060405234801561001057600080fd5b50600436106100415760003560e01c806306661abd146100465780637357f5d214610064578063e1c7392a14610080575b600080fd5b61004e61008a565b60405161005b91906101aa565b60405180910390f35b61007e6004803603810190610079919061015b565b610090565b005b61008861013c565b005b60015481565b60038114156100b75781600160008282546100ab91906101c5565b92505081905550610138565b60058114156100ea578160026100cd919061021b565b600160008282546100de91906101c5565b92505081905550610137565b600781141561011d5781600a61010091906101c5565b6001600082825461011191906101c5565b92505081905550610136565b600160008154809291906101309061027f565b91905055505b5b5b5050565b6001600081905550565b600081359050610155816102fc565b92915050565b60008060408385031215610172576101716102f7565b5b600061018085828601610146565b925050602061019185828601610146565b9150509250929050565b6101a481610275565b82525050565b60006020820190506101bf600083018461019b565b92915050565b60006101d082610275565b91506101db83610275565b9250827fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff038211156102105761020f6102c8565b5b828201905092915050565b600061022682610275565b915061023183610275565b9250817fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff048311821515161561026a576102696102c8565b5b828202905092915050565b6000819050919050565b600061028a82610275565b91507fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff8214156102bd576102bc6102c8565b5b600182019050919050565b7f4e487b7100000000000000000000000000000000000000000000000000000000600052601160045260246000fd5b600080fd5b61030581610275565b811461031057600080fd5b5056fea26469706673582212202f9c24200282a71edb4cfb1018bca4a5608551f6bf5910ca1569133908c2605464736f6c63430008060033",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    }, 
+    {
+        "address": "0x901d12ebe1b195e5aa8748e62bd7734ae19b51f",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "0x7357f5d2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x7357f5d2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "name": "run(uint256,uint256)",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    }]
+}

tests/testdata/concolic_io/simple_example.sol

@@ -0,0 +1,19 @@
+// source of the bytecode, as a reference for the test.
+pragma solidity 0.8.6;
+
+contract Example1 {
+    uint256 private initialized = 0;
+    uint256 public count = 1;
+
+    function init() public {
+        initialized = 1;
+    }
+
+    function run(uint256 input, uint val) public {
+        if (val == 3) {
+            count += input;
+        }
+        else
+            count++;
+    }
+}

tests/testdata/concolic_io/simple_example_input.json

@@ -0,0 +1,48 @@
+{
+    "initialState": {
+        "accounts": {
+            "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe": {
+                "balance": "0x10000",
+                "code": "",
+                "nonce": 0,
+                "storage": {}
+            },
+            "0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef": {
+                "balance": "0x0",
+                "code": "",
+                "nonce": 0,
+                "storage": {}
+            }
+        }
+    },
+    "steps": [{
+        "address": "",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "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",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    }, 
+    {
+        "address": "0x901d12ebe1b195e5aa8748e62bd7734ae19b51f",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "0x7357f5d2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x7357f5d2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "name": "run(uint256,uint256)",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    }]
+}

tests/testdata/concolic_io/two_contract.sol

@@ -0,0 +1,42 @@
+pragma solidity 0.8.6;
+
+/**
+ * @title Storage
+ * @dev Store & retreive value in a variable
+ */
+contract D1 {
+
+    uint256 number;
+
+    function store(uint256 num) public {
+        assert(num < 5);
+        number =num;
+    }
+    
+    function retval() public returns(uint256){
+        return number;
+    }
+}
+
+contract D2 {
+ D1 d1;
+  constructor() public
+  {
+       d1 = D1(0x0901d12ebE1b195E5AA8748E62Bd7734aE19B51F);
+  }
+  function test(uint256 num) public returns(uint256) {
+    uint256 sum = d1.retval() + num;
+    if (sum == 10) {
+        return sum + 10;
+    }
+    else if(sum == 11) {
+        return sum + 12;
+    }
+    else if(sum == 30) {
+        return sum * 2;
+    }
+    assert(sum != 20);
+    return sum;
+  }
+}
+

tests/testdata/concolic_io/two_contract_input.json

@@ -0,0 +1,78 @@
+{
+    "initialState": {
+        "accounts": {
+            "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe": {
+                "balance": "0x10000000000000000000000000000",
+                "code": "",
+                "nonce": 0,
+                "storage": {}
+            },
+            "0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef": {
+                "balance": "0x0",
+                "code": "",
+                "nonce": 0,
+                "storage": {}
+            }
+        }
+    },
+    "steps": [{
+        "address": "",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "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",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    },
+    {
+        "address": "0x0901d12ebE1b195E5AA8748E62Bd7734aE19B51F",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x6057361d0000000000000000000000000000000000000000000000000000000000000001",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    },
+    {
+        "address": "",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x608060405234801561001057600080fd5b50730901d12ebe1b195e5aa8748e62bd7734ae19b51f6000806101000a81548173ffffffffffffffffffffffffffffffffffffffff021916908373ffffffffffffffffffffffffffffffffffffffff16021790555061039e806100746000396000f3fe608060405234801561001057600080fd5b506004361061002b5760003560e01c806329e99f0714610030575b600080fd5b61004a600480360381019061004591906101b0565b610060565b6040516100579190610219565b60405180910390f35b6000808260008054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff16639c8834536040518163ffffffff1660e01b8152600401602060405180830381600087803b1580156100cc57600080fd5b505af11580156100e0573d6000803e3d6000fd5b505050506040513d601f19601f8201168201806040525081019061010491906101dd565b61010e9190610234565b9050600a81141561012e57600a816101269190610234565b915050610181565b600b81141561014c57600c816101449190610234565b915050610181565b601e81141561016a57600281610162919061028a565b915050610181565b601481141561017c5761017b6102ee565b5b809150505b919050565b60008135905061019581610351565b92915050565b6000815190506101aa81610351565b92915050565b6000602082840312156101c6576101c561034c565b5b60006101d484828501610186565b91505092915050565b6000602082840312156101f3576101f261034c565b5b60006102018482850161019b565b91505092915050565b610213816102e4565b82525050565b600060208201905061022e600083018461020a565b92915050565b600061023f826102e4565b915061024a836102e4565b9250827fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff0382111561027f5761027e61031d565b5b828201905092915050565b6000610295826102e4565b91506102a0836102e4565b9250817fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff04831182151516156102d9576102d861031d565b5b828202905092915050565b6000819050919050565b7f4e487b7100000000000000000000000000000000000000000000000000000000600052600160045260246000fd5b7f4e487b7100000000000000000000000000000000000000000000000000000000600052601160045260246000fd5b600080fd5b61035a816102e4565b811461036557600080fd5b5056fea26469706673582212205af1f2d3a496abf9b24e8953ec8c2869d565a0a6057c1ff82097fbff424f6e3464736f6c63430008060033",
+        "name": "unknown",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    },
+    {
+        "address": "0x384f682f4a5AbefC8795Cc38a340dE9446dFAE7A",
+        "blockCoinbase": "0xcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcbcb",
+        "blockDifficulty": "0xa7d7343662e26",
+        "blockGasLimit": "0x7d0000",
+        "blockNumber": "0x66e393",
+        "blockTime": "0x5bfa4639",
+        "calldata": "0x29e99f07000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "gasLimit": "0x7d000",
+        "gasPrice": "0x773594000",
+        "input": "0x29e99f07000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "name": "",
+        "origin": "0xaffeaffeaffeaffeaffeaffeaffeaffeaffeaffe",
+        "value": "0x0"
+    }]
+}

tests/testdata/inputs/coverage.sol.o

@@ -0,0 +1 @@
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