./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91 --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 e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:16:49,480 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:16:49,548 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:16:49,554 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:16:49,555 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:16:49,580 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:16:49,581 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:16:49,582 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:16:49,582 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:16:49,583 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:16:49,584 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:16:49,584 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:16:49,585 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:16:49,586 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:16:49,586 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:16:49,587 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:16:49,588 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:16:49,588 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:16:49,589 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:16:49,590 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:16:49,590 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:16:49,591 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:16:49,592 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:16:49,593 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:16:49,594 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:16:49,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:16:49,595 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:16:49,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:16:49,596 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:16:49,596 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:16:49,597 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:16:49,597 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:16:49,598 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:16:49,598 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:16:49,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:16:49,599 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:16:49,600 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:16:49,600 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:16:49,600 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:16:49,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:16:49,601 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:16:49,602 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:16:49,602 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:16:49,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:16:49,603 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_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 [2023-11-24 23:16:49,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:16:49,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:16:49,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:16:49,962 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:16:49,962 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:16:49,964 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2023-11-24 23:16:53,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:16:53,694 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:16:53,695 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2023-11-24 23:16:53,738 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/data/ee92a51c8/fc4f95b17b914e11a985e557342e3956/FLAG974ee9bc7 [2023-11-24 23:16:53,754 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/data/ee92a51c8/fc4f95b17b914e11a985e557342e3956 [2023-11-24 23:16:53,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:16:53,758 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:16:53,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:16:53,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:16:53,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:16:53,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:16:53" (1/1) ... [2023-11-24 23:16:53,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204880f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:53, skipping insertion in model container [2023-11-24 23:16:53,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:16:53" (1/1) ... [2023-11-24 23:16:53,913 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:16:54,281 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_41b30907-6445-44db-9cd1-c075308f1f2f/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2023-11-24 23:16:54,291 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_41b30907-6445-44db-9cd1-c075308f1f2f/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2023-11-24 23:16:55,444 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,446 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,447 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,449 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,452 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,481 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,483 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,486 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,488 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,497 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,499 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,501 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:55,502 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,077 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:16:56,079 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:16:56,081 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:16:56,082 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:16:56,084 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:16:56,085 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:16:56,086 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:16:56,087 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:16:56,088 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:16:56,089 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:16:56,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:16:56,423 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:16:56,450 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_41b30907-6445-44db-9cd1-c075308f1f2f/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2023-11-24 23:16:56,451 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_41b30907-6445-44db-9cd1-c075308f1f2f/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2023-11-24 23:16:56,541 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,543 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,546 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,548 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,549 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,566 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,574 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,578 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,579 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,579 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,580 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:16:56,651 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:16:56,652 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:16:56,652 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:16:56,653 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:16:56,662 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:16:56,662 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:16:56,663 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:16:56,664 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:16:56,664 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:16:56,665 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:16:56,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:16:56,978 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,978 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,978 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,978 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,978 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,979 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,980 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:16:56,987 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:16:56,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56 WrapperNode [2023-11-24 23:16:56,988 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:16:56,989 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:16:56,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:16:56,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:16:56,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,079 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,114 INFO L138 Inliner]: procedures = 678, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 27 [2023-11-24 23:16:57,114 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:16:57,115 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:16:57,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:16:57,115 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:16:57,124 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,141 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,148 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,150 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,155 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:16:57,156 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:16:57,156 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:16:57,156 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:16:57,157 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (1/1) ... [2023-11-24 23:16:57,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:16:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:57,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:16:57,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:16:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2023-11-24 23:16:57,242 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2023-11-24 23:16:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-24 23:16:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-24 23:16:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:16:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:16:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:16:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:16:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:16:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:16:57,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:16:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-24 23:16:57,245 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-24 23:16:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:16:57,246 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:16:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:16:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:16:57,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:16:57,538 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:16:57,540 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:16:57,708 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:16:57,746 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:16:57,746 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 23:16:57,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:16:57 BoogieIcfgContainer [2023-11-24 23:16:57,755 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:16:57,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:16:57,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:16:57,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:16:57,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:16:53" (1/3) ... [2023-11-24 23:16:57,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6c54dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:16:57, skipping insertion in model container [2023-11-24 23:16:57,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:16:56" (2/3) ... [2023-11-24 23:16:57,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6c54dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:16:57, skipping insertion in model container [2023-11-24 23:16:57,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:16:57" (3/3) ... [2023-11-24 23:16:57,769 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2023-11-24 23:16:57,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:16:57,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:16:57,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:16:57,870 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;@21eefc49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:16:57,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:16:57,875 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) [2023-11-24 23:16:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:16:57,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:57,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:16:57,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:57,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1347006557, now seen corresponding path program 1 times [2023-11-24 23:16:57,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:57,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753804526] [2023-11-24 23:16:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:57,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:58,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:58,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753804526] [2023-11-24 23:16:58,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753804526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:58,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:16:58,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:16:58,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272685406] [2023-11-24 23:16:58,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:58,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:16:58,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:16:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:16:58,283 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) [2023-11-24 23:16:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:58,320 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2023-11-24 23:16:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:16:58,322 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 [2023-11-24 23:16:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:58,329 INFO L225 Difference]: With dead ends: 56 [2023-11-24 23:16:58,330 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 23:16:58,333 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 [2023-11-24 23:16:58,336 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 [2023-11-24 23:16:58,337 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] [2023-11-24 23:16:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 23:16:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-24 23:16:58,372 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) [2023-11-24 23:16:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-24 23:16:58,375 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2023-11-24 23:16:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:58,376 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-24 23:16:58,376 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) [2023-11-24 23:16:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-24 23:16:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 23:16:58,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:58,378 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] [2023-11-24 23:16:58,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:16:58,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:58,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash -641262810, now seen corresponding path program 1 times [2023-11-24 23:16:58,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:58,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490728107] [2023-11-24 23:16:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:58,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:58,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:58,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490728107] [2023-11-24 23:16:58,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490728107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:58,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:16:58,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:16:58,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140569268] [2023-11-24 23:16:58,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:58,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:16:58,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:16:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:16:58,743 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) [2023-11-24 23:16:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:58,855 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-11-24 23:16:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:16:58,856 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 [2023-11-24 23:16:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:58,860 INFO L225 Difference]: With dead ends: 39 [2023-11-24 23:16:58,861 INFO L226 Difference]: Without dead ends: 37 [2023-11-24 23:16:58,862 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 [2023-11-24 23:16:58,867 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:16:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 118 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:16:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-24 23:16:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-11-24 23:16:58,888 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) [2023-11-24 23:16:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-24 23:16:58,893 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2023-11-24 23:16:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:58,894 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-24 23:16:58,894 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) [2023-11-24 23:16:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-24 23:16:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:16:58,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:58,897 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] [2023-11-24 23:16:58,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:16:58,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:58,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:58,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1781677901, now seen corresponding path program 1 times [2023-11-24 23:16:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:58,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570232796] [2023-11-24 23:16:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:58,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:59,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:59,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570232796] [2023-11-24 23:16:59,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570232796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:16:59,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:16:59,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:16:59,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586845829] [2023-11-24 23:16:59,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:16:59,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:16:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:16:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:16:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:16:59,171 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) [2023-11-24 23:16:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:16:59,219 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-11-24 23:16:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:16:59,219 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 [2023-11-24 23:16:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:16:59,221 INFO L225 Difference]: With dead ends: 64 [2023-11-24 23:16:59,221 INFO L226 Difference]: Without dead ends: 37 [2023-11-24 23:16:59,222 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 [2023-11-24 23:16:59,223 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 [2023-11-24 23:16:59,224 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] [2023-11-24 23:16:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-24 23:16:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-24 23:16:59,231 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) [2023-11-24 23:16:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-24 23:16:59,233 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2023-11-24 23:16:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:16:59,233 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-24 23:16:59,233 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) [2023-11-24 23:16:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-24 23:16:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 23:16:59,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:16:59,235 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] [2023-11-24 23:16:59,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:16:59,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:16:59,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:16:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1996872153, now seen corresponding path program 1 times [2023-11-24 23:16:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:16:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137005171] [2023-11-24 23:16:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:16:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:16:59,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:16:59,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137005171] [2023-11-24 23:16:59,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137005171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:16:59,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320989167] [2023-11-24 23:16:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:16:59,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:16:59,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:16:59,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:16:59,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:16:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:16:59,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-24 23:16:59,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:00,064 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-11-24 23:17:00,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-11-24 23:17:00,192 INFO L378 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 [2023-11-24 23:17:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:00,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:17:01,660 INFO L378 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 [2023-11-24 23:17:01,667 INFO L378 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 [2023-11-24 23:17:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:01,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320989167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:17:01,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746842713] [2023-11-24 23:17:01,776 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-24 23:17:01,777 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:17:01,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:17:01,789 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:17:01,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:17:01,952 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-11-24 23:17:05,806 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 130 for LOIs [2023-11-24 23:17:06,217 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-24 23:17:06,246 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 125 for LOIs [2023-11-24 23:17:07,036 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 125 for LOIs [2023-11-24 23:17:07,428 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:17:14,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '578#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 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_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13 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)))) (and (or (and (= |#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|) (= (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|) (= (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) (= |v_aws_linked_list_node_reset_#t~memset~res299.base_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13) (exists ((|v_#valid_19| (Array Int Int))) (and (= |#valid| (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 1)) (= (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_7|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1))) (= |#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|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13) (= |#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)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1|) (<= 15 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1| 18446744073709551616))))) (and (= |#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|) (= (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|) (= (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) (= |v_aws_linked_list_node_reset_#t~memset~res299.base_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13) (exists ((|v_#valid_19| (Array Int Int))) (and (= |#valid| (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 1)) (= (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_7|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1))) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2| Int)) (and (<= 15 (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|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13) (= |#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)))) (not (= (mod (select (select |#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13) 0) 256) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-11-24 23:17:14,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:17:14,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:17:14,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 9] total 22 [2023-11-24 23:17:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78581668] [2023-11-24 23:17:14,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:17:14,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 23:17:14,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:14,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 23:17:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1360, Unknown=6, NotChecked=0, Total=1482 [2023-11-24 23:17:14,735 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 22 states, 17 states have (on average 2.0) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-24 23:17:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:15,838 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2023-11-24 23:17:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 23:17:15,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 23 [2023-11-24 23:17:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:15,840 INFO L225 Difference]: With dead ends: 71 [2023-11-24 23:17:15,841 INFO L226 Difference]: Without dead ends: 44 [2023-11-24 23:17:15,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=181, Invalid=2069, Unknown=6, NotChecked=0, Total=2256 [2023-11-24 23:17:15,843 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:15,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 229 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:17:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-24 23:17:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-11-24 23:17:15,863 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) [2023-11-24 23:17:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-11-24 23:17:15,867 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2023-11-24 23:17:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:15,868 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-11-24 23:17:15,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-24 23:17:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-11-24 23:17:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 23:17:15,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:15,871 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] [2023-11-24 23:17:15,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:17:16,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:16,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:17:16,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1528029081, now seen corresponding path program 1 times [2023-11-24 23:17:16,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:16,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997494409] [2023-11-24 23:17:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:16,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:17:16,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:16,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997494409] [2023-11-24 23:17:16,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997494409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:17:16,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192937888] [2023-11-24 23:17:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:16,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:16,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:16,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:17:16,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41b30907-6445-44db-9cd1-c075308f1f2f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:17:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:16,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-24 23:17:16,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:16,660 INFO L378 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 [2023-11-24 23:17:16,696 INFO L378 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 [2023-11-24 23:17:18,760 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_17 Int) (v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15 Int)) (let ((.cse0 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_17))) (= (select .cse0 (+ v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15 1)) (select .cse0 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_15)))) is different from true [2023-11-24 23:17:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:19,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:17:24,111 INFO L378 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 [2023-11-24 23:17:24,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:17:24,124 INFO L378 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 109 treesize of output 103 [2023-11-24 23:17:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:17:24,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192937888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:17:24,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965090495] [2023-11-24 23:17:24,226 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-24 23:17:24,226 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:17:24,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:17:24,227 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:17:24,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:17:24,284 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-11-24 23:17:26,994 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 183 for LOIs [2023-11-24 23:17:28,005 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-24 23:17:28,028 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 125 for LOIs [2023-11-24 23:17:29,133 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 125 for LOIs [2023-11-24 23:17:29,425 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:17:39,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '948#(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_26 Int)) (or (and (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)))))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_11| Int)) (or (and (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_26) (exists ((|v_#valid_20| (Array Int Int))) (and (= (select |v_#valid_20| 0) 0) (= (select |v_#valid_20| 3) 1) (= (select |v_#valid_20| 2) 1) (= (select |v_#valid_20| 4) 1) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|) (= (select |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0))) (= |#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$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_26 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$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$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3|) (<= 15 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| 18446744073709551616)))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_26) (exists ((|v_#valid_20| (Array Int Int))) (and (= (select |v_#valid_20| 0) 0) (= (select |v_#valid_20| 3) 1) (= (select |v_#valid_20| 2) 1) (= (select |v_#valid_20| 4) 1) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|) (= (select |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$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$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_26 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$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$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| Int)) (and (<= 15 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4|))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1)))))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_11| Int)) (or (and (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_26) (exists ((|v_#valid_20| (Array Int Int))) (and (= (select |v_#valid_20| 0) 0) (= (select |v_#valid_20| 3) 1) (= (select |v_#valid_20| 2) 1) (= (select |v_#valid_20| 4) 1) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|) (= (select |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$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$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_26 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$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$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3|) (<= 15 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| 18446744073709551616)))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_26) (exists ((|v_#valid_20| (Array Int Int))) (and (= (select |v_#valid_20| 0) 0) (= (select |v_#valid_20| 3) 1) (= (select |v_#valid_20| 2) 1) (= (select |v_#valid_20| 4) 1) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|) (= (select |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$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$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_26 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$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$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| Int)) (and (<= 15 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4|))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))))) (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 [2023-11-24 23:17:39,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:17:39,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:17:39,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 11] total 24 [2023-11-24 23:17:39,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960879899] [2023-11-24 23:17:39,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:17:39,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 23:17:39,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:39,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 23:17:39,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1446, Unknown=3, NotChecked=76, Total=1640 [2023-11-24 23:17:39,500 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)