./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:13:51,641 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:13:51,759 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:13:51,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:13:51,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:13:51,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:13:51,809 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:13:51,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:13:51,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:13:51,816 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:13:51,816 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:13:51,818 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:13:51,818 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:13:51,820 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:13:51,820 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:13:51,821 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:13:51,821 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:13:51,822 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:13:51,822 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:13:51,823 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:13:51,825 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:13:51,825 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:13:51,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:13:51,827 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:13:51,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:13:51,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:13:51,828 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:13:51,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:13:51,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:13:51,829 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:13:51,831 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:13:51,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:13:51,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:13:51,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:13:51,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:13:51,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:13:51,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:13:51,833 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:13:51,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:13:51,833 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:13:51,834 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:13:51,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:13:51,834 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2023-11-12 00:13:52,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:13:52,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:13:52,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:13:52,211 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:13:52,211 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:13:52,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2023-11-12 00:13:55,390 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:13:55,984 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:13:55,987 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2023-11-12 00:13:56,041 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/data/28bb2dbce/be8fa40328f441b7975f2ae6152a6d3d/FLAG7eaa3c896 [2023-11-12 00:13:56,065 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/data/28bb2dbce/be8fa40328f441b7975f2ae6152a6d3d [2023-11-12 00:13:56,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:13:56,073 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:13:56,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:13:56,078 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:13:56,084 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:13:56,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:13:56" (1/1) ... [2023-11-12 00:13:56,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4798d3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:56, skipping insertion in model container [2023-11-12 00:13:56,087 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:13:56" (1/1) ... [2023-11-12 00:13:56,230 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:13:56,577 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2023-11-12 00:13:56,587 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2023-11-12 00:13:57,739 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,740 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,741 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,742 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,744 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,759 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,760 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,762 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,763 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,766 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,767 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,768 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:57,768 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,265 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:13:58,266 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:13:58,268 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:13:58,269 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:13:58,271 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:13:58,272 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:13:58,272 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:13:58,273 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:13:58,274 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:13:58,275 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:13:58,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:13:58,521 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:13:58,554 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2023-11-12 00:13:58,555 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2023-11-12 00:13:58,653 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,654 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,654 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,656 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,657 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,677 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,696 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,698 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,698 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,700 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,700 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,706 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,706 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:13:58,747 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:13:58,748 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:13:58,749 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:13:58,750 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:13:58,752 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:13:58,752 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:13:58,753 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:13:58,754 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:13:58,754 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:13:58,755 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:13:58,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:13:59,063 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,063 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,063 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,064 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,064 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,064 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,064 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,064 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,065 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,065 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,066 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,066 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,066 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,068 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,068 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:13:59,076 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:13:59,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59 WrapperNode [2023-11-12 00:13:59,077 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:13:59,079 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:13:59,079 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:13:59,079 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:13:59,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,211 INFO L138 Inliner]: procedures = 678, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 27 [2023-11-12 00:13:59,212 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:13:59,213 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:13:59,213 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:13:59,213 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:13:59,222 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,227 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,239 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,246 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,248 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,253 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:13:59,254 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:13:59,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:13:59,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:13:59,255 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (1/1) ... [2023-11-12 00:13:59,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:13:59,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:59,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:13:59,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:13:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2023-11-12 00:13:59,339 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2023-11-12 00:13:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-12 00:13:59,340 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-12 00:13:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:13:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:13:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:13:59,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:13:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:13:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:13:59,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:13:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 00:13:59,342 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 00:13:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:13:59,342 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:13:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:13:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:13:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:13:59,618 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:13:59,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:13:59,781 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:13:59,836 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:13:59,842 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:13:59,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:13:59 BoogieIcfgContainer [2023-11-12 00:13:59,845 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:13:59,847 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:13:59,847 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:13:59,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:13:59,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:13:56" (1/3) ... [2023-11-12 00:13:59,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6181a99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:13:59, skipping insertion in model container [2023-11-12 00:13:59,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:13:59" (2/3) ... [2023-11-12 00:13:59,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6181a99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:13:59, skipping insertion in model container [2023-11-12 00:13:59,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:13:59" (3/3) ... [2023-11-12 00:13:59,860 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2023-11-12 00:13:59,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:13:59,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:13:59,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:13:59,939 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5981aaaf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:13:59,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:13:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-12 00:13:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:13:59,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:59,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:13:59,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:59,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:59,981 INFO L85 PathProgramCache]: Analyzing trace with hash 325938203, now seen corresponding path program 1 times [2023-11-12 00:13:59,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:59,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042846088] [2023-11-12 00:13:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:00,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:00,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042846088] [2023-11-12 00:14:00,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042846088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:00,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:00,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:14:00,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053746549] [2023-11-12 00:14:00,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:00,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:14:00,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:00,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:14:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:00,436 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:14:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:00,487 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2023-11-12 00:14:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:14:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-12 00:14:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:00,498 INFO L225 Difference]: With dead ends: 56 [2023-11-12 00:14:00,498 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 00:14:00,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:00,506 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:00,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:14:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 00:14:00,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-12 00:14:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:14:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-12 00:14:00,551 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2023-11-12 00:14:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:00,552 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-12 00:14:00,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:14:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-12 00:14:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:14:00,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:00,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:00,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:14:00,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:00,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash -805366998, now seen corresponding path program 1 times [2023-11-12 00:14:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035597215] [2023-11-12 00:14:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:00,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:00,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035597215] [2023-11-12 00:14:00,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035597215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:00,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:00,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:14:00,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010221928] [2023-11-12 00:14:00,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:00,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:14:00,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:14:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:14:00,819 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 00:14:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:00,895 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-11-12 00:14:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:14:00,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-11-12 00:14:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:00,898 INFO L225 Difference]: With dead ends: 39 [2023-11-12 00:14:00,899 INFO L226 Difference]: Without dead ends: 37 [2023-11-12 00:14:00,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:14:00,901 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:00,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 118 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:14:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-12 00:14:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-11-12 00:14:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-12 00:14:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-12 00:14:00,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2023-11-12 00:14:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:00,913 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-12 00:14:00,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 00:14:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-12 00:14:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 00:14:00,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:00,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:00,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:14:00,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:00,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash 989415369, now seen corresponding path program 1 times [2023-11-12 00:14:00,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:00,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073787509] [2023-11-12 00:14:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:00,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:01,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:01,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073787509] [2023-11-12 00:14:01,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073787509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:01,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:01,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:14:01,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122951301] [2023-11-12 00:14:01,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:01,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:14:01,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:14:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:14:01,223 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:14:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:01,268 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-11-12 00:14:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:14:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-11-12 00:14:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:01,270 INFO L225 Difference]: With dead ends: 64 [2023-11-12 00:14:01,270 INFO L226 Difference]: Without dead ends: 37 [2023-11-12 00:14:01,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:14:01,272 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:01,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:14:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-12 00:14:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-12 00:14:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-12 00:14:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-12 00:14:01,290 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2023-11-12 00:14:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:01,290 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-12 00:14:01,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:14:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-12 00:14:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 00:14:01,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:01,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:01,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:14:01,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:01,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash -518460441, now seen corresponding path program 1 times [2023-11-12 00:14:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:01,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774552537] [2023-11-12 00:14:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:01,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:01,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:01,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774552537] [2023-11-12 00:14:01,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774552537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:14:01,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990685861] [2023-11-12 00:14:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:01,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:01,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:01,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:01,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:14:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:02,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 00:14:02,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:02,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:14:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:02,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:02,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-12 00:14:02,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-12 00:14:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:02,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990685861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:02,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278488387] [2023-11-12 00:14:02,969 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:02,969 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:02,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:02,980 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:02,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:03,114 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-11-12 00:14:06,587 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2023-11-12 00:14:06,936 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-12 00:14:06,959 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-11-12 00:14:07,682 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-11-12 00:14:08,073 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:13,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '573#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#t~memset~res299.base_7| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10 Int)) (and (<= 2 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (not (= (mod (select (select |#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) 0) 256) 0)) (<= 2 |v_aws_linked_list_node_reset_#t~memset~res299.base_7|) (or (and (exists ((|v_#valid_18| (Array Int Int))) (and (= (select |v_#valid_18| 2) 1) (= |#valid| (store |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 1)) (= (select |v_#valid_18| 0) 0) (= 1 (select |v_#valid_18| 1)) (= (select |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) (= (select |v_#valid_18| 4) 1) (= (select |v_#valid_18| 3) 1))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |v_aws_linked_list_node_reset_#t~memset~res299.base_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (exists ((|v_#length_8| (Array Int Int))) (and (= (select |v_#length_8| 2) 37) (= (select |v_#length_8| 3) 12) (= (select |v_#length_8| 4) 40) (= (store |v_#length_8| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 16) |#length|) (= (select |v_#length_8| 1) 2))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 16))) (and (exists ((|v_#valid_18| (Array Int Int))) (and (= (select |v_#valid_18| 2) 1) (= |#valid| (store |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 1)) (= (select |v_#valid_18| 0) 0) (= 1 (select |v_#valid_18| 1)) (= (select |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) (= (select |v_#valid_18| 4) 1) (= (select |v_#valid_18| 3) 1))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1|))) (= |v_aws_linked_list_node_reset_#t~memset~res299.base_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (exists ((|v_#length_8| (Array Int Int))) (and (= (select |v_#length_8| 2) 37) (= (select |v_#length_8| 3) 12) (= (select |v_#length_8| 4) 40) (= (store |v_#length_8| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 16) |#length|) (= (select |v_#length_8| 1) 2))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 16)))) (<= 2 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10))) (= ~tl_last_error~0 0))' at error location [2023-11-12 00:14:13,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:13,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:14:13,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2023-11-12 00:14:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100699127] [2023-11-12 00:14:13,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:13,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:14:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:14:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1019, Unknown=6, NotChecked=0, Total=1122 [2023-11-12 00:14:13,909 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 00:14:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:14,732 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2023-11-12 00:14:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:14:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 23 [2023-11-12 00:14:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:14,734 INFO L225 Difference]: With dead ends: 71 [2023-11-12 00:14:14,734 INFO L226 Difference]: Without dead ends: 44 [2023-11-12 00:14:14,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=129, Invalid=1347, Unknown=6, NotChecked=0, Total=1482 [2023-11-12 00:14:14,737 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:14,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 195 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:14:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-12 00:14:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-11-12 00:14:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-12 00:14:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-11-12 00:14:14,756 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2023-11-12 00:14:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:14,756 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-11-12 00:14:14,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 00:14:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-11-12 00:14:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 00:14:14,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:14,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:14,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:14,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:14,966 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:14,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:14,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1249058711, now seen corresponding path program 1 times [2023-11-12 00:14:14,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:14,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764033513] [2023-11-12 00:14:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:14,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:15,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:15,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764033513] [2023-11-12 00:14:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764033513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:14:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875007234] [2023-11-12 00:14:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:15,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:15,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:15,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:15,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:14:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:15,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-12 00:14:15,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:15,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:14:15,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-11-12 00:14:17,503 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_14 Int) (v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_14 Int)) (let ((.cse0 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_14))) (= (select .cse0 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_14) (select .cse0 (+ v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_14 1))))) is different from true [2023-11-12 00:14:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:17,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:19,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-11-12 00:14:19,045 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:14:19,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 107 [2023-11-12 00:14:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875007234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040265794] [2023-11-12 00:14:19,130 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:19,131 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:19,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:19,131 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:19,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:19,183 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-11-12 00:14:21,484 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-11-12 00:14:22,316 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-12 00:14:22,331 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-11-12 00:14:23,304 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-11-12 00:14:23,566 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:32,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '934#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_17| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 Int)) (and (<= 2 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (<= 2 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_11| Int)) (and (or (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1)))) (<= 2 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_4 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 Int) (|v_aws_is_mem_zeroed_#t~mem45_30| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_30| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_4 18446744073709551616)) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_30|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616) 9223372036854775807)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_30|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616))))))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_11| Int)) (and (or (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1)))) (<= 2 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|))) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_3 Int) (|v_aws_is_mem_zeroed_#t~mem45_30| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_30| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_3 18446744073709551616)) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3 (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_30|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem45_30| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3))))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3))))))) (= ~tl_last_error~0 0))' at error location [2023-11-12 00:14:32,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:32,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:14:32,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 11] total 24 [2023-11-12 00:14:32,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296802463] [2023-11-12 00:14:32,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:32,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 00:14:32,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 00:14:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1448, Unknown=2, NotChecked=76, Total=1640 [2023-11-12 00:14:32,030 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 00:14:34,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:35,874 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2023-11-12 00:14:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:14:35,875 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 26 [2023-11-12 00:14:35,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:35,878 INFO L225 Difference]: With dead ends: 80 [2023-11-12 00:14:35,878 INFO L226 Difference]: Without dead ends: 49 [2023-11-12 00:14:35,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=163, Invalid=2001, Unknown=2, NotChecked=90, Total=2256 [2023-11-12 00:14:35,882 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:35,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 228 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 291 Invalid, 1 Unknown, 55 Unchecked, 2.7s Time] [2023-11-12 00:14:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-12 00:14:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-11-12 00:14:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-12 00:14:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-11-12 00:14:35,899 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 26 [2023-11-12 00:14:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:35,899 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-11-12 00:14:35,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 00:14:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-11-12 00:14:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:14:35,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:35,902 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:35,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:36,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:36,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:36,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:36,111 INFO L85 PathProgramCache]: Analyzing trace with hash -842842685, now seen corresponding path program 2 times [2023-11-12 00:14:36,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:36,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669638836] [2023-11-12 00:14:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:36,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:14:36,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:36,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669638836] [2023-11-12 00:14:36,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669638836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:14:36,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276408141] [2023-11-12 00:14:36,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:14:36,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:36,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:36,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:36,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8bd528e-0326-46dc-b63f-43150fb7002a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:14:36,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:14:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:14:36,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-12 00:14:36,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:36,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:14:36,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 00:14:36,921 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:14:36,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 00:14:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:14:37,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:37,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276408141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:14:37,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722748669] [2023-11-12 00:14:37,250 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:37,250 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:37,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:37,251 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:37,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:37,330 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-11-12 00:14:39,299 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-11-12 00:14:40,112 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-12 00:14:40,136 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-11-12 00:14:41,210 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-11-12 00:14:41,498 INFO L180 IcfgInterpreter]: Interpretation finished