./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:11:24,430 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:11:24,537 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:11:24,548 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:11:24,549 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:11:24,593 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:11:24,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:11:24,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:11:24,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:11:24,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:11:24,601 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:11:24,602 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:11:24,603 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:11:24,604 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:11:24,605 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:11:24,605 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:11:24,606 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:11:24,606 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:11:24,607 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:11:24,608 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:11:24,608 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:11:24,609 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:11:24,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:11:24,610 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:11:24,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:11:24,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:11:24,611 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:11:24,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:11:24,612 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:11:24,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:11:24,614 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:11:24,614 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:11:24,614 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:11:24,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:11:24,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:24,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:11:24,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:11:24,616 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:11:24,616 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:11:24,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:11:24,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:11:24,617 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:11:24,617 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:11:24,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:11:24,618 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_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2023-11-23 21:11:24,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:11:24,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:11:24,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:11:24,895 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:11:24,896 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:11:24,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2023-11-23 21:11:27,991 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:11:28,551 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:11:28,552 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2023-11-23 21:11:28,610 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/data/f17d3e356/477f17761bef4b539ced2a01f20cce05/FLAG89ee345c0 [2023-11-23 21:11:28,629 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/data/f17d3e356/477f17761bef4b539ced2a01f20cce05 [2023-11-23 21:11:28,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:11:28,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:11:28,643 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:28,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:11:28,649 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:11:28,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:11:28" (1/1) ... [2023-11-23 21:11:28,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4a059f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:28, skipping insertion in model container [2023-11-23 21:11:28,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:11:28" (1/1) ... [2023-11-23 21:11:28,774 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:11:29,068 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_4987b98b-5457-455b-9db5-31384d2d62aa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2023-11-23 21:11:29,077 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_4987b98b-5457-455b-9db5-31384d2d62aa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2023-11-23 21:11:30,098 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,099 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,099 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,101 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,102 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,123 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,124 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,126 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,128 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,130 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,132 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,132 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,133 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,684 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:11:30,685 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:11:30,687 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:11:30,689 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:11:30,690 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:11:30,691 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:11:30,692 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:11:30,693 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:11:30,694 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:11:30,695 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:11:30,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:30,921 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:11:30,934 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_4987b98b-5457-455b-9db5-31384d2d62aa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2023-11-23 21:11:30,935 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_4987b98b-5457-455b-9db5-31384d2d62aa/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2023-11-23 21:11:30,993 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,994 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,995 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,995 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:30,996 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,009 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,010 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,011 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,012 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,026 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,027 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,027 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,028 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:11:31,080 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:11:31,081 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:11:31,082 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:11:31,084 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:11:31,085 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:11:31,086 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:11:31,087 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:11:31,088 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:11:31,089 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:11:31,090 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:11:31,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:11:31,390 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,390 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,391 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,392 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,392 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,393 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,393 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,394 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,395 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,395 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,395 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,398 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,398 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,398 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,398 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:11:31,406 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:11:31,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31 WrapperNode [2023-11-23 21:11:31,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:11:31,409 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:31,409 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:11:31,409 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:11:31,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,583 INFO L138 Inliner]: procedures = 678, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 27 [2023-11-23 21:11:31,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:11:31,584 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:11:31,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:11:31,584 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:11:31,593 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,598 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,609 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,613 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,623 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:11:31,624 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:11:31,624 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:11:31,625 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:11:31,625 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (1/1) ... [2023-11-23 21:11:31,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:31,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:31,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:11:31,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:11:31,735 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2023-11-23 21:11:31,735 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2023-11-23 21:11:31,735 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 21:11:31,735 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 21:11:31,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:11:31,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:11:31,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:11:31,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:11:31,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:11:31,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:11:31,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:11:31,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:11:31,737 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:11:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:11:31,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:11:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:11:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:11:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:11:32,066 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:11:32,068 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:11:32,192 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:11:32,235 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:11:32,235 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:11:32,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:32 BoogieIcfgContainer [2023-11-23 21:11:32,237 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:11:32,240 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:11:32,241 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:11:32,253 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:11:32,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:11:28" (1/3) ... [2023-11-23 21:11:32,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20de59c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:32, skipping insertion in model container [2023-11-23 21:11:32,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:11:31" (2/3) ... [2023-11-23 21:11:32,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20de59c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:32, skipping insertion in model container [2023-11-23 21:11:32,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:32" (3/3) ... [2023-11-23 21:11:32,257 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2023-11-23 21:11:32,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:11:32,287 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:11:32,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:11:32,339 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;@79a4206f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:11:32,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:11:32,345 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) [2023-11-23 21:11:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:11:32,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:32,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:32,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:32,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1347006557, now seen corresponding path program 1 times [2023-11-23 21:11:32,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:32,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313621020] [2023-11-23 21:11:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:32,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:32,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313621020] [2023-11-23 21:11:32,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313621020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:32,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:32,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:11:32,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327026923] [2023-11-23 21:11:32,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:32,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:11:32,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:11:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:11:32,788 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) [2023-11-23 21:11:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:32,839 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2023-11-23 21:11:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:11:32,842 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 [2023-11-23 21:11:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:32,850 INFO L225 Difference]: With dead ends: 56 [2023-11-23 21:11:32,850 INFO L226 Difference]: Without dead ends: 29 [2023-11-23 21:11:32,854 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 [2023-11-23 21:11:32,858 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 [2023-11-23 21:11:32,859 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] [2023-11-23 21:11:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-23 21:11:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-23 21:11:32,902 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) [2023-11-23 21:11:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-23 21:11:32,905 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2023-11-23 21:11:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:32,906 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-23 21:11:32,906 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) [2023-11-23 21:11:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-23 21:11:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:11:32,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:32,912 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] [2023-11-23 21:11:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:11:32,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:32,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:32,918 INFO L85 PathProgramCache]: Analyzing trace with hash -641262810, now seen corresponding path program 1 times [2023-11-23 21:11:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:32,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500319981] [2023-11-23 21:11:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:32,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:33,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:33,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500319981] [2023-11-23 21:11:33,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500319981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:33,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:33,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:11:33,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84067561] [2023-11-23 21:11:33,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:33,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:11:33,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:11:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:33,321 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) [2023-11-23 21:11:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:33,415 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-11-23 21:11:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:11:33,416 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 [2023-11-23 21:11:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:33,419 INFO L225 Difference]: With dead ends: 39 [2023-11-23 21:11:33,419 INFO L226 Difference]: Without dead ends: 37 [2023-11-23 21:11:33,421 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 [2023-11-23 21:11:33,422 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:33,423 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] [2023-11-23 21:11:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-23 21:11:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-11-23 21:11:33,443 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) [2023-11-23 21:11:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-23 21:11:33,447 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2023-11-23 21:11:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:33,449 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-23 21:11:33,449 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) [2023-11-23 21:11:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-23 21:11:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:11:33,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:33,452 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] [2023-11-23 21:11:33,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:11:33,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:33,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1781677901, now seen corresponding path program 1 times [2023-11-23 21:11:33,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:33,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59266399] [2023-11-23 21:11:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:33,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:33,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:33,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59266399] [2023-11-23 21:11:33,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59266399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:33,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:33,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:11:33,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799591323] [2023-11-23 21:11:33,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:33,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:11:33,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:11:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:11:33,798 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) [2023-11-23 21:11:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:33,837 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-11-23 21:11:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:11:33,838 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 [2023-11-23 21:11:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:33,839 INFO L225 Difference]: With dead ends: 64 [2023-11-23 21:11:33,839 INFO L226 Difference]: Without dead ends: 37 [2023-11-23 21:11:33,840 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 [2023-11-23 21:11:33,846 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 [2023-11-23 21:11:33,848 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] [2023-11-23 21:11:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-23 21:11:33,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-23 21:11:33,863 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) [2023-11-23 21:11:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-23 21:11:33,866 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2023-11-23 21:11:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:33,867 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-23 21:11:33,868 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) [2023-11-23 21:11:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-23 21:11:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:11:33,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:33,870 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] [2023-11-23 21:11:33,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:11:33,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:33,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:33,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1996872153, now seen corresponding path program 1 times [2023-11-23 21:11:33,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:33,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380822197] [2023-11-23 21:11:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:33,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:34,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380822197] [2023-11-23 21:11:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380822197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781061474] [2023-11-23 21:11:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:34,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:34,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:34,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:34,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:11:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:34,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 21:11:34,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:34,401 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 [2023-11-23 21:11:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:34,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:11:35,055 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 [2023-11-23 21:11:35,061 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 [2023-11-23 21:11:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:35,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781061474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:11:35,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364676926] [2023-11-23 21:11:35,121 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:11:35,121 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:11:35,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:11:35,130 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:11:35,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:11:35,267 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-11-23 21:11:38,331 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2023-11-23 21:11:38,701 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-23 21:11:38,724 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-11-23 21:11:39,437 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-11-23 21:11:39,815 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:11:46,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(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_9 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 (exists ((|v_#valid_18| (Array Int Int))) (and (= (select |v_#valid_18| 2) 1) (= |#valid| (store |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 1)) (= (select |v_#valid_18| 0) 0) (= 1 (select |v_#valid_18| 1)) (= (select |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) (= (select |v_#valid_18| 4) 1) (= (select |v_#valid_18| 3) 1))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1|))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_9) (= (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_9) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 16))) (and (exists ((|v_#valid_18| (Array Int Int))) (and (= (select |v_#valid_18| 2) 1) (= |#valid| (store |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 1)) (= (select |v_#valid_18| 0) 0) (= 1 (select |v_#valid_18| 1)) (= (select |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) (= (select |v_#valid_18| 4) 1) (= (select |v_#valid_18| 3) 1))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_9) (= (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) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2|))) (= |v_aws_linked_list_node_reset_#t~memset~res299.base_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_9) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 16)))) (not (= (mod (select (select |#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_9) 0) 256) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-11-23 21:11:46,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:11:46,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:11:46,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 14 [2023-11-23 21:11:46,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764008578] [2023-11-23 21:11:46,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:11:46,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:11:46,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:11:46,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=837, Unknown=6, NotChecked=0, Total=930 [2023-11-23 21:11:46,565 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:11:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:47,145 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2023-11-23 21:11:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:11:47,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 23 [2023-11-23 21:11:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:47,147 INFO L225 Difference]: With dead ends: 71 [2023-11-23 21:11:47,147 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 21:11:47,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=121, Invalid=1063, Unknown=6, NotChecked=0, Total=1190 [2023-11-23 21:11:47,149 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:47,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:11:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 21:11:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-11-23 21:11:47,159 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) [2023-11-23 21:11:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-11-23 21:11:47,161 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2023-11-23 21:11:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:47,161 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-11-23 21:11:47,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:11:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-11-23 21:11:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 21:11:47,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:47,163 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] [2023-11-23 21:11:47,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:11:47,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:47,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:47,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1528029081, now seen corresponding path program 1 times [2023-11-23 21:11:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:47,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971928462] [2023-11-23 21:11:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:11:47,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:47,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971928462] [2023-11-23 21:11:47,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971928462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:47,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694842236] [2023-11-23 21:11:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:47,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:47,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:47,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:47,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:11:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:47,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-23 21:11:47,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:47,880 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 13 treesize of output 9 [2023-11-23 21:11:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:11:47,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:11:48,512 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 16 treesize of output 14 [2023-11-23 21:11:48,517 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 18 treesize of output 14 [2023-11-23 21:11:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:11:48,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694842236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:11:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912609185] [2023-11-23 21:11:48,611 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:11:48,611 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:11:48,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:11:48,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:11:48,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:11:48,672 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-11-23 21:11:51,224 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-11-23 21:11:52,223 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-23 21:11:52,246 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-11-23 21:11:53,457 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-11-23 21:11:53,717 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:12:02,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '924#(and (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_21 Int)) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_11| Int)) (or (and (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_21 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (<= (+ |#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_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_21) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_21 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (<= (+ |#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_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_21) (= 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_#t~mem45_27| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_3 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_27| 256) 0)) (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_27|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616))) (and (= |v_aws_is_mem_zeroed_#t~mem45_27| (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))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) 9223372036854775807))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_3 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3)))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_11| Int)) (or (and (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_21 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (<= (+ |#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_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_21) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_21 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (<= (+ |#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_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_21) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))))) (exists ((|v_aws_is_mem_zeroed_#t~mem45_27| Int) (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_~buf_u8~0.base_BEFORE_RETURN_4 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_27| 256) 0)) (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 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_27|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616))) (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_27|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616) 9223372036854775807))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_4 18446744073709551616))))))) (<= 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) (= ~tl_last_error~0 0))' at error location [2023-11-23 21:12:02,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:12:02,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:12:02,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11] total 18 [2023-11-23 21:12:02,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463772030] [2023-11-23 21:12:02,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:12:02,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:12:02,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:02,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:12:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1074, Unknown=1, NotChecked=0, Total=1190 [2023-11-23 21:12:02,329 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 18 states, 15 states have (on average 2.466666666666667) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:12:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:03,012 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2023-11-23 21:12:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:12:03,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.466666666666667) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2023-11-23 21:12:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:03,014 INFO L225 Difference]: With dead ends: 84 [2023-11-23 21:12:03,014 INFO L226 Difference]: Without dead ends: 53 [2023-11-23 21:12:03,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=151, Invalid=1330, Unknown=1, NotChecked=0, Total=1482 [2023-11-23 21:12:03,016 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:03,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 193 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:12:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-23 21:12:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2023-11-23 21:12:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-23 21:12:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-11-23 21:12:03,028 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 26 [2023-11-23 21:12:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:03,028 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-11-23 21:12:03,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.466666666666667) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:12:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-11-23 21:12:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:12:03,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:03,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:03,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 21:12:03,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:03,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:03,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:03,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1616024321, now seen corresponding path program 2 times [2023-11-23 21:12:03,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:03,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822314106] [2023-11-23 21:12:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:03,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:12:03,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:03,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822314106] [2023-11-23 21:12:03,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822314106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:12:03,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526085121] [2023-11-23 21:12:03,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:12:03,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:03,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:03,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:12:03,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4987b98b-5457-455b-9db5-31384d2d62aa/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:12:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:12:03,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:12:03,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-23 21:12:03,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:12:03,791 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 [2023-11-23 21:12:03,811 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 21 treesize of output 20 [2023-11-23 21:12:03,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:12:03,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 21:12:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:12:03,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:12:05,122 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 28 treesize of output 26 [2023-11-23 21:12:05,128 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 36 treesize of output 32 [2023-11-23 21:12:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:05,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526085121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:12:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [820245614] [2023-11-23 21:12:05,198 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:12:05,199 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:12:05,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:12:05,199 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:12:05,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:12:05,254 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-11-23 21:12:07,246 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-11-23 21:12:07,941 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-23 21:12:07,957 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-11-23 21:12:08,900 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-11-23 21:12:09,108 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:12:18,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1326#(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_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_27| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 Int)) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_15| Int)) (or (and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_6| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_6|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_6| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 24)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 |v_aws_linked_list_node_reset_#t~memset~res299.base_15|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_10| (Array Int Int))) (and (= (select |v_#length_10| 4) 40) (= |#length| (store |v_#length_10| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 16)) (= (select |v_#length_10| 3) 12) (= 2 (select |v_#length_10| 1)) (= (select |v_#length_10| 2) 37))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) (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| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) 0) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 1) |#valid|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)) (and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_5| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_5|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_5| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 24)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 |v_aws_linked_list_node_reset_#t~memset~res299.base_15|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_10| (Array Int Int))) (and (= (select |v_#length_10| 4) 40) (= |#length| (store |v_#length_10| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 16)) (= (select |v_#length_10| 3) 12) (= 2 (select |v_#length_10| 1)) (= (select |v_#length_10| 2) 37))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) (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| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) 0) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 1) |#valid|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_5 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_5 Int) (|v_aws_is_mem_zeroed_#t~mem45_44| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_5 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_44| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_5 18446744073709551616)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem45_44| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_5) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_5 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616))))) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem45_44| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_5) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_5 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616))))))))) (and (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 Int) (|v_aws_is_mem_zeroed_#t~mem45_44| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_6 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6 Int)) (and (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem45_44| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6)))) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6 (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_44|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_44| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_6 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_15| Int)) (or (and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_6| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_6|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_6| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 24)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 |v_aws_linked_list_node_reset_#t~memset~res299.base_15|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_10| (Array Int Int))) (and (= (select |v_#length_10| 4) 40) (= |#length| (store |v_#length_10| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 16)) (= (select |v_#length_10| 3) 12) (= 2 (select |v_#length_10| 1)) (= (select |v_#length_10| 2) 37))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) (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| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) 0) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 1) |#valid|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)) (and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_5| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_5|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_5| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 24)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 |v_aws_linked_list_node_reset_#t~memset~res299.base_15|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_10| (Array Int Int))) (and (= (select |v_#length_10| 4) 40) (= |#length| (store |v_#length_10| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 16)) (= (select |v_#length_10| 3) 12) (= 2 (select |v_#length_10| 1)) (= (select |v_#length_10| 2) 37))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) (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| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) 0) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 1) |#valid|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|))))))) (= ~tl_last_error~0 0))' at error location [2023-11-23 21:12:18,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:12:18,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:12:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 17] total 26 [2023-11-23 21:12:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434997597] [2023-11-23 21:12:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:12:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 21:12:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 21:12:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1653, Unknown=1, NotChecked=0, Total=1806 [2023-11-23 21:12:18,976 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 26 states, 22 states have (on average 2.0) internal successors, (44), 24 states have internal predecessors, (44), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7)