./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/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_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh --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 0.2.4-dev-0e0057c [2023-12-02 13:21:50,778 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:21:50,840 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 13:21:50,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:21:50,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:21:50,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:21:50,867 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:21:50,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:21:50,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:21:50,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:21:50,869 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:21:50,869 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:21:50,870 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:21:50,870 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:21:50,871 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:21:50,871 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:21:50,872 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:21:50,872 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:21:50,873 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:21:50,873 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:21:50,874 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:21:50,874 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:21:50,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:21:50,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:21:50,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:21:50,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:21:50,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:21:50,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:21:50,878 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:21:50,878 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:21:50,878 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:21:50,879 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:21:50,879 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:21:50,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:21:50,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:21:50,880 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:21:50,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:21:50,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:21:50,880 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:21:50,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:21:50,880 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:21:50,881 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:21:50,881 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:21:50,881 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:21:50,881 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_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2023-12-02 13:21:51,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:21:51,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:21:51,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:21:51,123 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:21:51,123 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:21:51,124 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2023-12-02 13:21:53,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:21:54,256 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:21:54,257 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2023-12-02 13:21:54,285 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/data/963cc3f97/4d6589b377dd48048da69007f00f87f6/FLAGb5e8ea37f [2023-12-02 13:21:54,298 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/data/963cc3f97/4d6589b377dd48048da69007f00f87f6 [2023-12-02 13:21:54,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:21:54,301 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:21:54,303 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:21:54,303 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:21:54,308 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:21:54,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:21:54" (1/1) ... [2023-12-02 13:21:54,309 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b7d669b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:54, skipping insertion in model container [2023-12-02 13:21:54,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:21:54" (1/1) ... [2023-12-02 13:21:54,402 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:21:54,604 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_8f7ce735-cfa7-4238-9084-cc756d42fe66/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2023-12-02 13:21:54,611 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_8f7ce735-cfa7-4238-9084-cc756d42fe66/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2023-12-02 13:21:55,314 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,315 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,316 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,317 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,318 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,334 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,335 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,337 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,338 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,340 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,341 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,342 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,343 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,727 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 13:21:55,729 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 13:21:55,730 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 13:21:55,731 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 13:21:55,733 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 13:21:55,734 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 13:21:55,734 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 13:21:55,735 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 13:21:55,736 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 13:21:55,736 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 13:21:55,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:21:55,905 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:21:55,920 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_8f7ce735-cfa7-4238-9084-cc756d42fe66/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2023-12-02 13:21:55,921 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_8f7ce735-cfa7-4238-9084-cc756d42fe66/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2023-12-02 13:21:55,966 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,966 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,967 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,967 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,968 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,980 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,980 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,982 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,982 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,984 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,985 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,985 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:55,986 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:21:56,029 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 13:21:56,030 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 13:21:56,031 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 13:21:56,031 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 13:21:56,033 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 13:21:56,033 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 13:21:56,034 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 13:21:56,034 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 13:21:56,035 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 13:21:56,035 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 13:21:56,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:21:56,232 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,232 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,232 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,232 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,233 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,233 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,233 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,233 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,233 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,233 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,233 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,233 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,234 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,234 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,234 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:21:56,240 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:21:56,240 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56 WrapperNode [2023-12-02 13:21:56,240 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:21:56,241 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:21:56,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:21:56,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:21:56,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,307 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,338 INFO L138 Inliner]: procedures = 678, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 27 [2023-12-02 13:21:56,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:21:56,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:21:56,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:21:56,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:21:56,346 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,362 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,370 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,372 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,377 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:21:56,378 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:21:56,378 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:21:56,378 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:21:56,379 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (1/1) ... [2023-12-02 13:21:56,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:21:56,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:21:56,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:21:56,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:21:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2023-12-02 13:21:56,451 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2023-12-02 13:21:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-12-02 13:21:56,451 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-12-02 13:21:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:21:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:21:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 13:21:56,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 13:21:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:21:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:21:56,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:21:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 13:21:56,452 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 13:21:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 13:21:56,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 13:21:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:21:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 13:21:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:21:56,645 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:21:56,647 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:21:56,765 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:21:56,799 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:21:56,799 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 13:21:56,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:56 BoogieIcfgContainer [2023-12-02 13:21:56,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:21:56,803 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:21:56,803 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:21:56,806 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:21:56,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:21:54" (1/3) ... [2023-12-02 13:21:56,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3a9c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:21:56, skipping insertion in model container [2023-12-02 13:21:56,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:56" (2/3) ... [2023-12-02 13:21:56,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3a9c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:21:56, skipping insertion in model container [2023-12-02 13:21:56,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:56" (3/3) ... [2023-12-02 13:21:56,809 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2023-12-02 13:21:56,828 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:21:56,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:21:56,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:21:56,874 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;@474b2231, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:21:56,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:21:56,878 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) [2023-12-02 13:21:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 13:21:56,884 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:56,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:56,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:56,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1347006557, now seen corresponding path program 1 times [2023-12-02 13:21:56,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:56,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733303507] [2023-12-02 13:21:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:56,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:57,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:57,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733303507] [2023-12-02 13:21:57,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733303507] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:57,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:57,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:21:57,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165444772] [2023-12-02 13:21:57,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:57,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:21:57,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:57,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:21:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:21:57,176 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) [2023-12-02 13:21:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:57,213 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2023-12-02 13:21:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:21:57,215 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 [2023-12-02 13:21:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:57,222 INFO L225 Difference]: With dead ends: 56 [2023-12-02 13:21:57,222 INFO L226 Difference]: Without dead ends: 29 [2023-12-02 13:21:57,225 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 [2023-12-02 13:21:57,229 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 [2023-12-02 13:21:57,230 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] [2023-12-02 13:21:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-02 13:21:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-02 13:21:57,262 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) [2023-12-02 13:21:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-12-02 13:21:57,265 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2023-12-02 13:21:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:57,265 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-12-02 13:21:57,265 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) [2023-12-02 13:21:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-12-02 13:21:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:21:57,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:57,267 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] [2023-12-02 13:21:57,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:21:57,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:57,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -641262810, now seen corresponding path program 1 times [2023-12-02 13:21:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:57,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384653952] [2023-12-02 13:21:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:57,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:57,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:57,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384653952] [2023-12-02 13:21:57,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384653952] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:57,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:57,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:21:57,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578460006] [2023-12-02 13:21:57,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:57,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:21:57,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:21:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:21:57,525 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) [2023-12-02 13:21:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:57,588 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-12-02 13:21:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:21:57,589 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 [2023-12-02 13:21:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:57,591 INFO L225 Difference]: With dead ends: 39 [2023-12-02 13:21:57,591 INFO L226 Difference]: Without dead ends: 37 [2023-12-02 13:21:57,592 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 [2023-12-02 13:21:57,593 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:21:57,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 118 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:21:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-02 13:21:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-12-02 13:21:57,602 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) [2023-12-02 13:21:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-12-02 13:21:57,604 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2023-12-02 13:21:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:57,604 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-12-02 13:21:57,604 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) [2023-12-02 13:21:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-12-02 13:21:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 13:21:57,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:57,606 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] [2023-12-02 13:21:57,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:21:57,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:57,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:57,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1781677901, now seen corresponding path program 1 times [2023-12-02 13:21:57,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:57,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596632993] [2023-12-02 13:21:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:57,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:57,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596632993] [2023-12-02 13:21:57,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596632993] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:57,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:57,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:21:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186680248] [2023-12-02 13:21:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:57,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:21:57,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:21:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:57,773 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) [2023-12-02 13:21:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:57,815 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-12-02 13:21:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:21:57,815 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 [2023-12-02 13:21:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:57,817 INFO L225 Difference]: With dead ends: 64 [2023-12-02 13:21:57,817 INFO L226 Difference]: Without dead ends: 37 [2023-12-02 13:21:57,818 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 [2023-12-02 13:21:57,819 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 [2023-12-02 13:21:57,820 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] [2023-12-02 13:21:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-02 13:21:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-12-02 13:21:57,826 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) [2023-12-02 13:21:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-12-02 13:21:57,828 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2023-12-02 13:21:57,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:57,828 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-12-02 13:21:57,829 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) [2023-12-02 13:21:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-12-02 13:21:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:21:57,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:57,830 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] [2023-12-02 13:21:57,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:21:57,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:57,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1996872153, now seen corresponding path program 1 times [2023-12-02 13:21:57,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:57,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924159701] [2023-12-02 13:21:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:57,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:58,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:58,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924159701] [2023-12-02 13:21:58,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924159701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:21:58,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150038489] [2023-12-02 13:21:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:58,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:21:58,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:21:58,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:21:58,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:21:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:58,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 13:21:58,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:21:58,293 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 [2023-12-02 13:21:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:58,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:21:58,938 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 [2023-12-02 13:21:58,943 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 [2023-12-02 13:21:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:58,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150038489] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:21:58,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500276680] [2023-12-02 13:21:59,005 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:21:59,005 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:21:59,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:21:59,014 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:21:59,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:21:59,164 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:22:01,698 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2023-12-02 13:22:01,918 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:22:01,935 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:22:02,356 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:22:02,611 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:08,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '573#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#t~memset~res299.base_7| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) 0) 256) 0)) (or (and (exists ((|v_#valid_18| (Array Int Int))) (and (= (select |v_#valid_18| 2) 1) (= |#valid| (store |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 1)) (= (select |v_#valid_18| 0) 0) (= 1 (select |v_#valid_18| 1)) (= (select |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) (= (select |v_#valid_18| 4) 1) (= (select |v_#valid_18| 3) 1))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |v_aws_linked_list_node_reset_#t~memset~res299.base_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (exists ((|v_#length_8| (Array Int Int))) (and (= (select |v_#length_8| 2) 37) (= (select |v_#length_8| 3) 12) (= (select |v_#length_8| 4) 40) (= (store |v_#length_8| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 16) |#length|) (= (select |v_#length_8| 1) 2))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_2|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 16))) (and (exists ((|v_#valid_18| (Array Int Int))) (and (= (select |v_#valid_18| 2) 1) (= |#valid| (store |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 1)) (= (select |v_#valid_18| 0) 0) (= 1 (select |v_#valid_18| 1)) (= (select |v_#valid_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) (= (select |v_#valid_18| 4) 1) (= (select |v_#valid_18| 3) 1))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_1|))) (= |v_aws_linked_list_node_reset_#t~memset~res299.base_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (exists ((|v_#length_8| (Array Int Int))) (and (= (select |v_#length_8| 2) 37) (= (select |v_#length_8| 3) 12) (= (select |v_#length_8| 4) 40) (= (store |v_#length_8| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 16) |#length|) (= (select |v_#length_8| 1) 2))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 16)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:22:08,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:08,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:22:08,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2023-12-02 13:22:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625335088] [2023-12-02 13:22:08,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 13:22:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 13:22:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1016, Unknown=6, NotChecked=0, Total=1122 [2023-12-02 13:22:08,283 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:22:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:09,080 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2023-12-02 13:22:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:22:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 23 [2023-12-02 13:22:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:09,082 INFO L225 Difference]: With dead ends: 71 [2023-12-02 13:22:09,082 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 13:22:09,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=139, Invalid=1415, Unknown=6, NotChecked=0, Total=1560 [2023-12-02 13:22:09,085 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:09,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 195 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:22:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 13:22:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-12-02 13:22:09,092 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) [2023-12-02 13:22:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-12-02 13:22:09,093 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2023-12-02 13:22:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:09,094 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-12-02 13:22:09,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:22:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-12-02 13:22:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 13:22:09,095 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:09,095 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] [2023-12-02 13:22:09,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:22:09,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:09,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:09,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1528029081, now seen corresponding path program 1 times [2023-12-02 13:22:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:09,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477673489] [2023-12-02 13:22:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:09,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:22:09,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:09,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477673489] [2023-12-02 13:22:09,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477673489] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:09,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001843295] [2023-12-02 13:22:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:09,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:09,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:09,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:09,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:22:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:09,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 13:22:09,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:09,699 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 [2023-12-02 13:22:09,717 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 [2023-12-02 13:22:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:10,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:22:10,681 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 22 treesize of output 20 [2023-12-02 13:22:10,684 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 27 treesize of output 23 [2023-12-02 13:22:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:10,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001843295] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:22:10,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40609965] [2023-12-02 13:22:10,720 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:22:10,721 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:22:10,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:22:10,721 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:22:10,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:10,781 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:22:12,746 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:22:13,498 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:22:13,514 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:22:14,576 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:22:14,821 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:23,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '934#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_17| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 Int)) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_11| Int)) (or (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))))) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_3 Int) (|v_aws_is_mem_zeroed_#t~mem45_29| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_29| 256) 0)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem45_29| (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)))) (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_29|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616)))) (<= (+ (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 (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_4|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_3| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 |v_aws_linked_list_node_reset_#t~memset~res299.base_11|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_4 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4 Int) (|v_aws_is_mem_zeroed_#t~mem45_29| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_29| 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_29|) (<= 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_29|) (<= (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))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:22:23,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:23,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:22:23,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 10] total 22 [2023-12-02 13:22:23,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915539796] [2023-12-02 13:22:23,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:23,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 13:22:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 13:22:23,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1370, Unknown=1, NotChecked=0, Total=1482 [2023-12-02 13:22:23,910 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:22:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:25,013 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2023-12-02 13:22:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:22:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 26 [2023-12-02 13:22:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:25,015 INFO L225 Difference]: With dead ends: 82 [2023-12-02 13:22:25,015 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 13:22:25,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=169, Invalid=1900, Unknown=1, NotChecked=0, Total=2070 [2023-12-02 13:22:25,017 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:25,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 228 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:22:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 13:22:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-12-02 13:22:25,025 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) [2023-12-02 13:22:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-12-02 13:22:25,026 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 26 [2023-12-02 13:22:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:25,026 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-12-02 13:22:25,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:22:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-12-02 13:22:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:22:25,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:25,027 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] [2023-12-02 13:22:25,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:22:25,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:25,228 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:25,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1616024321, now seen corresponding path program 2 times [2023-12-02 13:22:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:25,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502549223] [2023-12-02 13:22:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:25,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:22:25,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:25,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502549223] [2023-12-02 13:22:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502549223] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817940534] [2023-12-02 13:22:25,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:22:25,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:25,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:25,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:25,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:22:25,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:22:25,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:22:25,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-02 13:22:25,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:25,731 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 [2023-12-02 13:22:25,750 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 [2023-12-02 13:22:25,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:22:25,782 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 [2023-12-02 13:22:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:22:25,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:22:26,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817940534] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:26,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091969244] [2023-12-02 13:22:26,015 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:22:26,015 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:22:26,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:22:26,016 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:22:26,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:26,070 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:22:27,930 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:22:28,741 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:22:28,759 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:22:29,787 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:22:30,020 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:38,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1261#(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) (= ~tl_last_error~0 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_12| 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_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)) (= (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)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 |v_aws_linked_list_node_reset_#t~memset~res299.base_12|) (= (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_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)) (= (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)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 |v_aws_linked_list_node_reset_#t~memset~res299.base_12|) (= (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_43| 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) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_5 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_43| 256) 0)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem45_43| (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 (= |v_aws_is_mem_zeroed_#t~mem45_43| (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)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616) 9223372036854775807)))))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_12| 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_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)) (= (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)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 |v_aws_linked_list_node_reset_#t~memset~res299.base_12|) (= (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_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)) (= (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)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_33 |v_aws_linked_list_node_reset_#t~memset~res299.base_12|) (= (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_6 Int) (|v_aws_is_mem_zeroed_#t~mem45_43| 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_43| (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_43|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_43| 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)))))))' at error location [2023-12-02 13:22:38,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:38,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:22:38,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2023-12-02 13:22:38,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011066654] [2023-12-02 13:22:38,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:38,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 13:22:38,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 13:22:38,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=897, Unknown=1, NotChecked=0, Total=992 [2023-12-02 13:22:38,946 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 13:22:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:39,143 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2023-12-02 13:22:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:22:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2023-12-02 13:22:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:39,145 INFO L225 Difference]: With dead ends: 79 [2023-12-02 13:22:39,145 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 13:22:39,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=110, Invalid=1011, Unknown=1, NotChecked=0, Total=1122 [2023-12-02 13:22:39,147 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:39,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 170 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:22:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 13:22:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-12-02 13:22:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 32 states have internal predecessors, (37), 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) [2023-12-02 13:22:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-12-02 13:22:39,161 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 29 [2023-12-02 13:22:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:39,161 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-12-02 13:22:39,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 13:22:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-12-02 13:22:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 13:22:39,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:39,163 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:22:39,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:22:39,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:22:39,364 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:39,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1729559781, now seen corresponding path program 3 times [2023-12-02 13:22:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:39,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690677936] [2023-12-02 13:22:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:22:39,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:39,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690677936] [2023-12-02 13:22:39,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690677936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:39,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649174235] [2023-12-02 13:22:39,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:22:39,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:39,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:39,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:39,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:22:39,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:22:39,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:22:39,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 13:22:39,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:39,829 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 [2023-12-02 13:22:39,845 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 [2023-12-02 13:22:39,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:22:39,872 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 [2023-12-02 13:22:39,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:22:39,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 41 [2023-12-02 13:22:41,999 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_37 Int) (v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_39 Int)) (let ((.cse0 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_37))) (let ((.cse1 (select .cse0 (+ v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_39 1)))) (and (= (select .cse0 (+ 2 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_39)) .cse1) (= .cse1 (select .cse0 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_39)) (= .cse1 (select .cse0 (+ 3 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_39))))))) is different from true [2023-12-02 13:22:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:42,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:22:45,700 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 67 treesize of output 63 [2023-12-02 13:22:45,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:22:45,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 501 treesize of output 495 [2023-12-02 13:22:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:45,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649174235] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:22:45,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163916462] [2023-12-02 13:22:45,848 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:22:45,848 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:22:45,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:22:45,848 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:22:45,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:45,887 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:22:47,474 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:22:48,234 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:22:48,253 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:22:49,289 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:22:49,494 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:59,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1669#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| Int) (|v_old(#memory_int)_BEFORE_CALL_37| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46 Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| (Array Int (Array Int Int)))) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_16| Int)) (or (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 24)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_8| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_8| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_8|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#valid_21| (Array Int Int))) (and (= (store |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 1) |#valid|) (= (select |v_#valid_21| 4) 1) (= (select |v_#valid_21| 1) 1) (= (select |v_#valid_21| 0) 0) (= (select |v_#valid_21| 2) 1) (= (select |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) 0) (= (select |v_#valid_21| 3) 1))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#length_11| (Array Int Int))) (and (= |#length| (store |v_#length_11| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 16)) (= (select |v_#length_11| 4) 40) (= (select |v_#length_11| 3) 12) (= (select |v_#length_11| 2) 37) (= 2 (select |v_#length_11| 1)))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46 |v_aws_linked_list_node_reset_#t~memset~res299.base_16|)) (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_7| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_7|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_7| 18446744073709551616)))) (exists ((|v_#valid_21| (Array Int Int))) (and (= (store |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 1) |#valid|) (= (select |v_#valid_21| 4) 1) (= (select |v_#valid_21| 1) 1) (= (select |v_#valid_21| 0) 0) (= (select |v_#valid_21| 2) 1) (= (select |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) 0) (= (select |v_#valid_21| 3) 1))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#length_11| (Array Int Int))) (and (= |#length| (store |v_#length_11| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 16)) (= (select |v_#length_11| 4) 40) (= (select |v_#length_11| 3) 12) (= (select |v_#length_11| 2) 37) (= 2 (select |v_#length_11| 1)))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46 |v_aws_linked_list_node_reset_#t~memset~res299.base_16|)))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_7 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_7 Int) (|v_aws_is_mem_zeroed_#t~mem45_62| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_7 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_7 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_62| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_7) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_7)) |v_aws_is_mem_zeroed_#t~mem45_62|)) (and (= |v_aws_is_mem_zeroed_#t~mem45_62| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_7) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_7 (- 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616))))))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_16| Int)) (or (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 24)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_8| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_8| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_8|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#valid_21| (Array Int Int))) (and (= (store |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 1) |#valid|) (= (select |v_#valid_21| 4) 1) (= (select |v_#valid_21| 1) 1) (= (select |v_#valid_21| 0) 0) (= (select |v_#valid_21| 2) 1) (= (select |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) 0) (= (select |v_#valid_21| 3) 1))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#length_11| (Array Int Int))) (and (= |#length| (store |v_#length_11| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 16)) (= (select |v_#length_11| 4) 40) (= (select |v_#length_11| 3) 12) (= (select |v_#length_11| 2) 37) (= 2 (select |v_#length_11| 1)))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46 |v_aws_linked_list_node_reset_#t~memset~res299.base_16|)) (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_7| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_7|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_7| 18446744073709551616)))) (exists ((|v_#valid_21| (Array Int Int))) (and (= (store |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 1) |#valid|) (= (select |v_#valid_21| 4) 1) (= (select |v_#valid_21| 1) 1) (= (select |v_#valid_21| 0) 0) (= (select |v_#valid_21| 2) 1) (= (select |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) 0) (= (select |v_#valid_21| 3) 1))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#length_11| (Array Int Int))) (and (= |#length| (store |v_#length_11| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 16)) (= (select |v_#length_11| 4) 40) (= (select |v_#length_11| 3) 12) (= (select |v_#length_11| 2) 37) (= 2 (select |v_#length_11| 1)))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_46 |v_aws_linked_list_node_reset_#t~memset~res299.base_16|)))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_8 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 Int) (|v_aws_is_mem_zeroed_#t~mem45_62| Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_62| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_8 18446744073709551616)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem45_62| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616))))) (and (= |v_aws_is_mem_zeroed_#t~mem45_62| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616))))))))) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:22:59,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:59,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:22:59,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 14] total 32 [2023-12-02 13:22:59,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703121524] [2023-12-02 13:22:59,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:59,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 13:22:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:59,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 13:22:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2108, Unknown=3, NotChecked=92, Total=2352 [2023-12-02 13:22:59,130 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:23:02,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:23:04,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:23:06,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:23:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:07,056 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2023-12-02 13:23:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:23:07,056 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 30 [2023-12-02 13:23:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:07,058 INFO L225 Difference]: With dead ends: 88 [2023-12-02 13:23:07,058 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 13:23:07,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=191, Invalid=2566, Unknown=3, NotChecked=102, Total=2862 [2023-12-02 13:23:07,061 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:07,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 281 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 439 Invalid, 3 Unknown, 60 Unchecked, 7.0s Time] [2023-12-02 13:23:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 13:23:07,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-12-02 13:23:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.3125) internal successors, (42), 35 states have internal predecessors, (42), 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) [2023-12-02 13:23:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-12-02 13:23:07,075 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 30 [2023-12-02 13:23:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:07,075 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-12-02 13:23:07,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:23:07,075 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-12-02 13:23:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 13:23:07,077 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:07,077 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:07,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:23:07,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:07,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:07,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -101897653, now seen corresponding path program 4 times [2023-12-02 13:23:07,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:07,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209491530] [2023-12-02 13:23:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:07,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:23:07,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209491530] [2023-12-02 13:23:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209491530] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061657213] [2023-12-02 13:23:07,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:23:07,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:07,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:07,564 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:07,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:23:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:07,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-02 13:23:07,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:07,872 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 [2023-12-02 13:23:07,904 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 [2023-12-02 13:23:07,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:23:07,943 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 [2023-12-02 13:23:07,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:23:07,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:23:08,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:23:08,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 53 [2023-12-02 13:23:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:23:08,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:23:18,976 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 81 treesize of output 77 [2023-12-02 13:23:18,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:23:18,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1075 treesize of output 1067 [2023-12-02 13:23:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:23:19,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061657213] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:23:19,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439205529] [2023-12-02 13:23:19,153 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:23:19,153 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:23:19,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:23:19,154 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:23:19,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:23:19,203 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:23:20,923 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:23:21,650 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:23:21,665 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:23:22,736 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:23:22,955 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:24:00,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2124#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61 Int) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| Int) (|v_old(#memory_int)_BEFORE_CALL_47| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| (Array Int (Array Int Int)))) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_20| Int)) (or (and (= 0 (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 32)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 24)) (= 0 (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 32)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 0)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_10| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_10| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_10|))) (exists ((|v_#valid_22| (Array Int Int))) (and (= (store |v_#valid_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 1) |#valid|) (= (select |v_#valid_22| 3) 1) (= (select |v_#valid_22| 2) 1) (= (select |v_#valid_22| 1) 1) (= (select |v_#valid_22| 0) 0) (= (select |v_#valid_22| 4) 1) (= (select |v_#valid_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 0))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 0) 48) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61 |v_aws_linked_list_node_reset_#t~memset~res299.base_20|) (exists ((|v_#length_12| (Array Int Int))) (and (= 2 (select |v_#length_12| 1)) (= |#length| (store |v_#length_12| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 16)) (= (select |v_#length_12| 2) 37) (= 40 (select |v_#length_12| 4)) (= (select |v_#length_12| 3) 12))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 24))) (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_9| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_9| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_9|))) (= 0 (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 32)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 24)) (= 0 (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 32)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 0)) (exists ((|v_#valid_22| (Array Int Int))) (and (= (store |v_#valid_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 1) |#valid|) (= (select |v_#valid_22| 3) 1) (= (select |v_#valid_22| 2) 1) (= (select |v_#valid_22| 1) 1) (= (select |v_#valid_22| 0) 0) (= (select |v_#valid_22| 4) 1) (= (select |v_#valid_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 0))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 0) 48) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61 |v_aws_linked_list_node_reset_#t~memset~res299.base_20|) (exists ((|v_#length_12| (Array Int Int))) (and (= 2 (select |v_#length_12| 1)) (= |#length| (store |v_#length_12| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 16)) (= (select |v_#length_12| 2) 37) (= 40 (select |v_#length_12| 4)) (= (select |v_#length_12| 3) 12))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 24))))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_10 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_10 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10 Int) (|v_aws_is_mem_zeroed_#t~mem45_83| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_10 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_10 18446744073709551616)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem45_83| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_10) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_10)))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_10) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_10 (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_83|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10 18446744073709551616)))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_83| 256) 0))))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_20| Int)) (or (and (= 0 (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 32)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 24)) (= 0 (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 32)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 0)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_10| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_10| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_10|))) (exists ((|v_#valid_22| (Array Int Int))) (and (= (store |v_#valid_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 1) |#valid|) (= (select |v_#valid_22| 3) 1) (= (select |v_#valid_22| 2) 1) (= (select |v_#valid_22| 1) 1) (= (select |v_#valid_22| 0) 0) (= (select |v_#valid_22| 4) 1) (= (select |v_#valid_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 0))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 0) 48) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61 |v_aws_linked_list_node_reset_#t~memset~res299.base_20|) (exists ((|v_#length_12| (Array Int Int))) (and (= 2 (select |v_#length_12| 1)) (= |#length| (store |v_#length_12| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 16)) (= (select |v_#length_12| 2) 37) (= 40 (select |v_#length_12| 4)) (= (select |v_#length_12| 3) 12))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 24))) (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_9| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_9| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_9|))) (= 0 (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 32)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 24)) (= 0 (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 32)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 0)) (exists ((|v_#valid_22| (Array Int Int))) (and (= (store |v_#valid_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 1) |#valid|) (= (select |v_#valid_22| 3) 1) (= (select |v_#valid_22| 2) 1) (= (select |v_#valid_22| 1) 1) (= (select |v_#valid_22| 0) 0) (= (select |v_#valid_22| 4) 1) (= (select |v_#valid_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 0))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_47| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 0) 48) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_61 |v_aws_linked_list_node_reset_#t~memset~res299.base_20|) (exists ((|v_#length_12| (Array Int Int))) (and (= 2 (select |v_#length_12| 1)) (= |#length| (store |v_#length_12| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 16)) (= (select |v_#length_12| 2) 37) (= 40 (select |v_#length_12| 4)) (= (select |v_#length_12| 3) 12))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_47| 4) 24))))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_9 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_9 Int) (|v_aws_is_mem_zeroed_#t~mem45_83| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_9 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_9 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9) (or (and (= |v_aws_is_mem_zeroed_#t~mem45_83| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_9) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_9 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9 18446744073709551616))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_9) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_9 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_83|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9 18446744073709551616) 9223372036854775807))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_83| 256) 0))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:24:00,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:24:00,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:24:00,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 20, 16] total 40 [2023-12-02 13:24:00,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030587971] [2023-12-02 13:24:00,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:24:00,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 13:24:00,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:24:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 13:24:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2962, Unknown=17, NotChecked=0, Total=3192 [2023-12-02 13:24:00,014 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 38 states have internal predecessors, (59), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:24:02,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:04,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:06,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:08,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:10,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:12,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:17,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:21,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:23,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:25,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:30,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:24:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:24:31,755 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2023-12-02 13:24:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 13:24:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 38 states have internal predecessors, (59), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 33 [2023-12-02 13:24:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:24:31,757 INFO L225 Difference]: With dead ends: 97 [2023-12-02 13:24:31,757 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 13:24:31,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=287, Invalid=3853, Unknown=20, NotChecked=0, Total=4160 [2023-12-02 13:24:31,760 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 19 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:24:31,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 505 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 887 Invalid, 11 Unknown, 0 Unchecked, 24.3s Time] [2023-12-02 13:24:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 13:24:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2023-12-02 13:24:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 38 states have internal predecessors, (47), 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) [2023-12-02 13:24:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-12-02 13:24:31,779 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 33 [2023-12-02 13:24:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:24:31,779 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-12-02 13:24:31,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 38 states have internal predecessors, (59), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:24:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-12-02 13:24:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 13:24:31,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:24:31,781 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:24:31,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:24:31,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:24:31,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:24:31,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:24:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1361609533, now seen corresponding path program 5 times [2023-12-02 13:24:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:24:31,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480097747] [2023-12-02 13:24:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:24:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:24:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:24:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 13:24:32,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:24:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480097747] [2023-12-02 13:24:32,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480097747] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:24:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450125783] [2023-12-02 13:24:32,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:24:32,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:24:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:24:32,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:24:32,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:24:32,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 13:24:32,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:24:32,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-02 13:24:32,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:24:32,853 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 [2023-12-02 13:24:32,872 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 [2023-12-02 13:24:32,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:32,901 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 [2023-12-02 13:24:32,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:32,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:24:32,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:32,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:24:33,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:33,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-02 13:24:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 13:24:33,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:24:33,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450125783] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:24:33,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827723448] [2023-12-02 13:24:33,435 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:24:33,435 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:24:33,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:24:33,436 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:24:33,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:24:33,493 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:24:35,239 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:24:35,950 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:24:35,968 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:24:36,964 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:24:37,204 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:24:46,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2511#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71 Int) (|v_old(#memory_int)_BEFORE_CALL_57| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| (Array Int (Array Int Int)))) (or (and (exists ((|v_aws_is_mem_zeroed_#t~mem45_99| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_12 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_12 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_12 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_99| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_12 18446744073709551616)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_12) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_12 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_99|)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_12) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_12 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_99|))))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_21| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 0) 48) (exists ((|v_#length_13| (Array Int Int))) (and (= |#length| (store |v_#length_13| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 16)) (= (select |v_#length_13| 3) 12) (= 2 (select |v_#length_13| 1)) (= 40 (select |v_#length_13| 4)) (= (select |v_#length_13| 2) 37))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71 |v_aws_linked_list_node_reset_#t~memset~res299.base_21|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_12| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_12|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_12| 18446744073709551616)))) (exists ((|v_#valid_23| (Array Int Int))) (and (= (store |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 1) |#valid|) (= (select |v_#valid_23| 1) 1) (= (select |v_#valid_23| 4) 1) (= (select |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) 0) (= (select |v_#valid_23| 0) 0) (= (select |v_#valid_23| 2) 1) (= (select |v_#valid_23| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 32) 0)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 0) 48) (exists ((|v_#length_13| (Array Int Int))) (and (= |#length| (store |v_#length_13| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 16)) (= (select |v_#length_13| 3) 12) (= 2 (select |v_#length_13| 1)) (= 40 (select |v_#length_13| 4)) (= (select |v_#length_13| 2) 37))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71 |v_aws_linked_list_node_reset_#t~memset~res299.base_21|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_11| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_11| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_11|))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (exists ((|v_#valid_23| (Array Int Int))) (and (= (store |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 1) |#valid|) (= (select |v_#valid_23| 1) 1) (= (select |v_#valid_23| 4) 1) (= (select |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) 0) (= (select |v_#valid_23| 0) 0) (= (select |v_#valid_23| 2) 1) (= (select |v_#valid_23| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 32) 0))))) (and (exists ((|v_aws_is_mem_zeroed_#t~mem45_99| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_11 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_11 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_11 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_99| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_11 18446744073709551616)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem45_99| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_11) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_11 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11 18446744073709551616))))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_11) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_11 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_99|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11 18446744073709551616) 9223372036854775807))))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_21| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 0) 48) (exists ((|v_#length_13| (Array Int Int))) (and (= |#length| (store |v_#length_13| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 16)) (= (select |v_#length_13| 3) 12) (= 2 (select |v_#length_13| 1)) (= 40 (select |v_#length_13| 4)) (= (select |v_#length_13| 2) 37))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71 |v_aws_linked_list_node_reset_#t~memset~res299.base_21|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_12| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_12|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_12| 18446744073709551616)))) (exists ((|v_#valid_23| (Array Int Int))) (and (= (store |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 1) |#valid|) (= (select |v_#valid_23| 1) 1) (= (select |v_#valid_23| 4) 1) (= (select |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) 0) (= (select |v_#valid_23| 0) 0) (= (select |v_#valid_23| 2) 1) (= (select |v_#valid_23| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 32) 0)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 0) 48) (exists ((|v_#length_13| (Array Int Int))) (and (= |#length| (store |v_#length_13| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 16)) (= (select |v_#length_13| 3) 12) (= 2 (select |v_#length_13| 1)) (= 40 (select |v_#length_13| 4)) (= (select |v_#length_13| 2) 37))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71 |v_aws_linked_list_node_reset_#t~memset~res299.base_21|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_11| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_11| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_11|))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_71) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_57| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (exists ((|v_#valid_23| (Array Int Int))) (and (= (store |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 1) |#valid|) (= (select |v_#valid_23| 1) 1) (= (select |v_#valid_23| 4) 1) (= (select |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) 0) (= (select |v_#valid_23| 0) 0) (= (select |v_#valid_23| 2) 1) (= (select |v_#valid_23| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_57| 4) 32) 0))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:24:46,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:24:46,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:24:46,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-12-02 13:24:46,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472921235] [2023-12-02 13:24:46,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:24:46,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 13:24:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:24:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 13:24:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1319, Unknown=1, NotChecked=0, Total=1406 [2023-12-02 13:24:46,879 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:24:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:24:47,719 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2023-12-02 13:24:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:24:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-12-02 13:24:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:24:47,721 INFO L225 Difference]: With dead ends: 90 [2023-12-02 13:24:47,721 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 13:24:47,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=122, Invalid=1857, Unknown=1, NotChecked=0, Total=1980 [2023-12-02 13:24:47,722 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:24:47,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 358 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:24:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 13:24:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-02 13:24:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 39 states have internal predecessors, (48), 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) [2023-12-02 13:24:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2023-12-02 13:24:47,735 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 36 [2023-12-02 13:24:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:24:47,735 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2023-12-02 13:24:47,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:24:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2023-12-02 13:24:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 13:24:47,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:24:47,736 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:24:47,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:24:47,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:24:47,937 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:24:47,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:24:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash 771646615, now seen corresponding path program 6 times [2023-12-02 13:24:47,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:24:47,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76861735] [2023-12-02 13:24:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:24:47,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:24:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:24:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 13:24:48,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:24:48,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76861735] [2023-12-02 13:24:48,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76861735] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:24:48,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254354053] [2023-12-02 13:24:48,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:24:48,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:24:48,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:24:48,393 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:24:48,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:24:48,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:24:48,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:24:48,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-02 13:24:48,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:24:48,718 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 [2023-12-02 13:24:48,741 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 [2023-12-02 13:24:48,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:48,773 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 [2023-12-02 13:24:48,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:48,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:24:48,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:48,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:24:48,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:48,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-02 13:24:48,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:24:48,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-02 13:24:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:24:50,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:24:52,876 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 52 treesize of output 50 [2023-12-02 13:24:52,880 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 80 treesize of output 76 [2023-12-02 13:24:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:24:53,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254354053] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:24:53,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1606340500] [2023-12-02 13:24:53,012 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:24:53,012 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:24:53,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:24:53,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:24:53,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:24:53,051 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:24:54,736 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:24:55,458 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:24:55,474 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:24:56,445 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:24:56,670 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:25:07,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3011#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_67| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84 Int) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| (Array Int (Array Int Int)))) (or (and (exists ((|v_aws_is_mem_zeroed_#t~mem45_121| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_13 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_13 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_13 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_13 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_121| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_13) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_13 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_121|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_13) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_13 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_121|))))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_25| Int)) (or (and (exists ((|v_#valid_24| (Array Int Int))) (and (= (select |v_#valid_24| 1) 1) (= (select |v_#valid_24| 4) 1) (= (select |v_#valid_24| 0) 0) (= |#valid| (store |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 1)) (= (select |v_#valid_24| 2) 1) (= (select |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) 0) (= (select |v_#valid_24| 3) 1))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 0)) (exists ((|v_#length_14| (Array Int Int))) (and (= (select |v_#length_14| 3) 12) (= 2 (select |v_#length_14| 1)) (= (select |v_#length_14| 2) 37) (= (store |v_#length_14| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 16) |#length|) (= 40 (select |v_#length_14| 4)))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 32) 0) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84 |v_aws_linked_list_node_reset_#t~memset~res299.base_25|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_13| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_13| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_13|))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 24)) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 16))) (and (exists ((|v_#valid_24| (Array Int Int))) (and (= (select |v_#valid_24| 1) 1) (= (select |v_#valid_24| 4) 1) (= (select |v_#valid_24| 0) 0) (= |#valid| (store |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 1)) (= (select |v_#valid_24| 2) 1) (= (select |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) 0) (= (select |v_#valid_24| 3) 1))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 0)) (exists ((|v_#length_14| (Array Int Int))) (and (= (select |v_#length_14| 3) 12) (= 2 (select |v_#length_14| 1)) (= (select |v_#length_14| 2) 37) (= (store |v_#length_14| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 16) |#length|) (= 40 (select |v_#length_14| 4)))) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_14| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_14|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_14| 18446744073709551616)))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 32) 0) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84 |v_aws_linked_list_node_reset_#t~memset~res299.base_25|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 24)) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 16)))))) (and (exists ((|v_aws_is_mem_zeroed_#t~mem45_121| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_14 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_14 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_14 Int)) (and (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_14) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_14)) |v_aws_is_mem_zeroed_#t~mem45_121|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616) 9223372036854775807)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_14) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_14 (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_121|))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_14 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_121| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_25| Int)) (or (and (exists ((|v_#valid_24| (Array Int Int))) (and (= (select |v_#valid_24| 1) 1) (= (select |v_#valid_24| 4) 1) (= (select |v_#valid_24| 0) 0) (= |#valid| (store |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 1)) (= (select |v_#valid_24| 2) 1) (= (select |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) 0) (= (select |v_#valid_24| 3) 1))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 0)) (exists ((|v_#length_14| (Array Int Int))) (and (= (select |v_#length_14| 3) 12) (= 2 (select |v_#length_14| 1)) (= (select |v_#length_14| 2) 37) (= (store |v_#length_14| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 16) |#length|) (= 40 (select |v_#length_14| 4)))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 32) 0) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84 |v_aws_linked_list_node_reset_#t~memset~res299.base_25|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_13| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_13| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_13|))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 24)) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 16))) (and (exists ((|v_#valid_24| (Array Int Int))) (and (= (select |v_#valid_24| 1) 1) (= (select |v_#valid_24| 4) 1) (= (select |v_#valid_24| 0) 0) (= |#valid| (store |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 1)) (= (select |v_#valid_24| 2) 1) (= (select |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) 0) (= (select |v_#valid_24| 3) 1))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 0)) (exists ((|v_#length_14| (Array Int Int))) (and (= (select |v_#length_14| 3) 12) (= 2 (select |v_#length_14| 1)) (= (select |v_#length_14| 2) 37) (= (store |v_#length_14| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 16) |#length|) (= 40 (select |v_#length_14| 4)))) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_14| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_14|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_14| 18446744073709551616)))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 32) 0) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_84 |v_aws_linked_list_node_reset_#t~memset~res299.base_25|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_67| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 24)) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_67| 4) 16)))))))) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:25:07,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:25:07,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:25:07,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 18] total 43 [2023-12-02 13:25:07,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768704879] [2023-12-02 13:25:07,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:25:07,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 13:25:07,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 13:25:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3297, Unknown=1, NotChecked=0, Total=3540 [2023-12-02 13:25:07,547 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:25:10,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:10,222 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2023-12-02 13:25:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 13:25:10,223 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2023-12-02 13:25:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:10,224 INFO L225 Difference]: With dead ends: 107 [2023-12-02 13:25:10,224 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 13:25:10,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=351, Invalid=4478, Unknown=1, NotChecked=0, Total=4830 [2023-12-02 13:25:10,227 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:10,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 500 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 13:25:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 13:25:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2023-12-02 13:25:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.358974358974359) internal successors, (53), 42 states have internal predecessors, (53), 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) [2023-12-02 13:25:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2023-12-02 13:25:10,249 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 37 [2023-12-02 13:25:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:10,250 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2023-12-02 13:25:10,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:25:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2023-12-02 13:25:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 13:25:10,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:10,251 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:10,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:25:10,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:25:10,452 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:25:10,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1397475447, now seen corresponding path program 7 times [2023-12-02 13:25:10,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:10,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94335418] [2023-12-02 13:25:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 13:25:10,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:10,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94335418] [2023-12-02 13:25:10,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94335418] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:25:10,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852385511] [2023-12-02 13:25:10,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:25:10,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:25:10,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:25:10,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:25:10,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:25:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:11,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-02 13:25:11,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:25:11,248 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 [2023-12-02 13:25:11,266 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 [2023-12-02 13:25:11,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:11,295 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 [2023-12-02 13:25:11,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:11,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:25:11,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:11,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:25:11,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:11,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-02 13:25:11,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:11,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-02 13:25:11,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:11,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 108 treesize of output 89 [2023-12-02 13:25:13,948 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90 Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_88 Int)) (let ((.cse0 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_88))) (let ((.cse1 (select .cse0 (+ 7 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90)))) (and (= (select .cse0 (+ 4 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90)) .cse1) (= (select .cse0 (+ v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90 1)) .cse1) (= (select .cse0 (+ 2 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90)) .cse1) (= .cse1 (select .cse0 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90)) (= .cse1 (select .cse0 (+ 3 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90))) (= (select .cse0 (+ 5 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90)) .cse1) (= (select .cse0 (+ 6 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_90)) .cse1))))) is different from true [2023-12-02 13:25:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:15,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:25:22,882 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 117 treesize of output 113 [2023-12-02 13:25:22,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:22,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7987 treesize of output 7979 [2023-12-02 13:25:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:23,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852385511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:25:23,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904096266] [2023-12-02 13:25:23,208 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:25:23,208 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:25:23,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:25:23,209 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:25:23,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:25:23,264 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:25:24,979 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:25:25,706 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:25:25,722 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:25:26,757 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:25:26,990 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:25:39,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3566#(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_77| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97 Int)) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_29| Int)) (or (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 0)) (exists ((|v_#valid_25| (Array Int Int))) (and (= (select |v_#valid_25| 2) 1) (= (select |v_#valid_25| 1) 1) (= (select |v_#valid_25| 4) 1) (= (select |v_#valid_25| 0) 0) (= (select |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) 0) (= (store |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 1) |#valid|) (= (select |v_#valid_25| 3) 1))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) (exists ((|v_#length_15| (Array Int Int))) (and (= (store |v_#length_15| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 16) |#length|) (= (select |v_#length_15| 3) 12) (= 40 (select |v_#length_15| 4)) (= (select |v_#length_15| 2) 37) (= (select |v_#length_15| 1) 2))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97 |v_aws_linked_list_node_reset_#t~memset~res299.base_29|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 1) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_15| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_15|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_15| 18446744073709551616))))) (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 0)) (exists ((|v_#valid_25| (Array Int Int))) (and (= (select |v_#valid_25| 2) 1) (= (select |v_#valid_25| 1) 1) (= (select |v_#valid_25| 4) 1) (= (select |v_#valid_25| 0) 0) (= (select |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) 0) (= (store |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 1) |#valid|) (= (select |v_#valid_25| 3) 1))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_16| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_16|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_16| 18446744073709551616)))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) (exists ((|v_#length_15| (Array Int Int))) (and (= (store |v_#length_15| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 16) |#length|) (= (select |v_#length_15| 3) 12) (= 40 (select |v_#length_15| 4)) (= (select |v_#length_15| 2) 37) (= (select |v_#length_15| 1) 2))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97 |v_aws_linked_list_node_reset_#t~memset~res299.base_29|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 1) 0)))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_15 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_15 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_15 Int) (|v_aws_is_mem_zeroed_#t~mem45_149| Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_149| 256) 0)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_15) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_15 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_149|)) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_15) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_15 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_149|))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_15 18446744073709551616))))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_29| Int)) (or (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 0)) (exists ((|v_#valid_25| (Array Int Int))) (and (= (select |v_#valid_25| 2) 1) (= (select |v_#valid_25| 1) 1) (= (select |v_#valid_25| 4) 1) (= (select |v_#valid_25| 0) 0) (= (select |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) 0) (= (store |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 1) |#valid|) (= (select |v_#valid_25| 3) 1))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) (exists ((|v_#length_15| (Array Int Int))) (and (= (store |v_#length_15| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 16) |#length|) (= (select |v_#length_15| 3) 12) (= 40 (select |v_#length_15| 4)) (= (select |v_#length_15| 2) 37) (= (select |v_#length_15| 1) 2))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97 |v_aws_linked_list_node_reset_#t~memset~res299.base_29|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 1) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_15| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_15|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_15| 18446744073709551616))))) (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_77| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_77| 4) 0)) (exists ((|v_#valid_25| (Array Int Int))) (and (= (select |v_#valid_25| 2) 1) (= (select |v_#valid_25| 1) 1) (= (select |v_#valid_25| 4) 1) (= (select |v_#valid_25| 0) 0) (= (select |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) 0) (= (store |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 1) |#valid|) (= (select |v_#valid_25| 3) 1))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_16| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_16|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_16| 18446744073709551616)))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) (exists ((|v_#length_15| (Array Int Int))) (and (= (store |v_#length_15| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 16) |#length|) (= (select |v_#length_15| 3) 12) (= 40 (select |v_#length_15| 4)) (= (select |v_#length_15| 2) 37) (= (select |v_#length_15| 1) 2))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_97 |v_aws_linked_list_node_reset_#t~memset~res299.base_29|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 1) 0)))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_16 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_16 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_16 Int) (|v_aws_is_mem_zeroed_#t~mem45_149| Int)) (and (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_16) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_16 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_149|)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_16) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_16 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_149|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_149| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_16 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:25:39,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:25:39,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:25:39,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 21] total 50 [2023-12-02 13:25:39,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566055758] [2023-12-02 13:25:39,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:25:39,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 13:25:39,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 13:25:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=4012, Unknown=3, NotChecked=128, Total=4422 [2023-12-02 13:25:39,792 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 50 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:25:45,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:25:50,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:25:52,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:25:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:52,961 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2023-12-02 13:25:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 13:25:52,962 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-12-02 13:25:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:52,964 INFO L225 Difference]: With dead ends: 116 [2023-12-02 13:25:52,964 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 13:25:52,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=341, Invalid=4630, Unknown=3, NotChecked=138, Total=5112 [2023-12-02 13:25:52,967 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:52,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 719 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1340 Invalid, 3 Unknown, 85 Unchecked, 10.8s Time] [2023-12-02 13:25:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 13:25:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2023-12-02 13:25:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.380952380952381) internal successors, (58), 45 states have internal predecessors, (58), 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) [2023-12-02 13:25:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2023-12-02 13:25:53,000 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 40 [2023-12-02 13:25:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:53,000 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2023-12-02 13:25:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 13:25:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2023-12-02 13:25:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 13:25:53,002 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:53,002 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:53,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:25:53,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 13:25:53,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:25:53,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1814060177, now seen corresponding path program 8 times [2023-12-02 13:25:53,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:53,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786753639] [2023-12-02 13:25:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:53,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 13:25:53,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:53,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786753639] [2023-12-02 13:25:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786753639] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:25:53,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432185038] [2023-12-02 13:25:53,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:25:53,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:25:53,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:25:53,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:25:53,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:25:55,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 13:25:55,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:25:55,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-02 13:25:55,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:25:55,044 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 [2023-12-02 13:25:55,064 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 [2023-12-02 13:25:55,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:55,097 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 [2023-12-02 13:25:55,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:55,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:25:55,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:55,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:25:55,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:55,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-02 13:25:55,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:55,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-02 13:25:55,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:55,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-12-02 13:25:55,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:25:55,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-12-02 13:25:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 13:25:55,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:25:55,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432185038] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:25:55,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1044475320] [2023-12-02 13:25:55,812 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:25:55,813 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:25:55,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:25:55,813 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:25:55,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:25:55,863 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:25:57,553 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:25:58,261 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:25:58,278 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:25:59,262 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:25:59,546 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:26:09,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4009#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_87| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107 Int) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| (Array Int (Array Int Int)))) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_30| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_87| 1) 1) 0) (= 0 (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 32)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107 |v_aws_linked_list_node_reset_#t~memset~res299.base_30|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 32) 0) (exists ((|v_#length_16| (Array Int Int))) (and (= 40 (select |v_#length_16| 4)) (= (store |v_#length_16| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 16) |#length|) (= 2 (select |v_#length_16| 1)) (= (select |v_#length_16| 2) 37) (= (select |v_#length_16| 3) 12))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_87| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_17| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_17|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_17| 18446744073709551616)))) (exists ((|v_#valid_26| (Array Int Int))) (and (= (select |v_#valid_26| 4) 1) (= (select |v_#valid_26| 0) 0) (= |#valid| (store |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 1)) (= (select |v_#valid_26| 3) 1) (= (select |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) 0) (= (select |v_#valid_26| 1) 1) (= (select |v_#valid_26| 2) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_87| 1) 1) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_18| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_18| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_18|))) (= 0 (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 32)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107 |v_aws_linked_list_node_reset_#t~memset~res299.base_30|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 32) 0) (exists ((|v_#length_16| (Array Int Int))) (and (= 40 (select |v_#length_16| 4)) (= (store |v_#length_16| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 16) |#length|) (= 2 (select |v_#length_16| 1)) (= (select |v_#length_16| 2) 37) (= (select |v_#length_16| 3) 12))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_87| 1) 0) 48) (exists ((|v_#valid_26| (Array Int Int))) (and (= (select |v_#valid_26| 4) 1) (= (select |v_#valid_26| 0) 0) (= |#valid| (store |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 1)) (= (select |v_#valid_26| 3) 1) (= (select |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) 0) (= (select |v_#valid_26| 1) 1) (= (select |v_#valid_26| 2) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_17 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_17 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_17 Int) (|v_aws_is_mem_zeroed_#t~mem45_167| Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_167| 256) 0)) (or (and (= |v_aws_is_mem_zeroed_#t~mem45_167| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_17) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_17 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem45_167| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_17) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_17 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616)))))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_17 18446744073709551616))))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_30| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_87| 1) 1) 0) (= 0 (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 32)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107 |v_aws_linked_list_node_reset_#t~memset~res299.base_30|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 32) 0) (exists ((|v_#length_16| (Array Int Int))) (and (= 40 (select |v_#length_16| 4)) (= (store |v_#length_16| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 16) |#length|) (= 2 (select |v_#length_16| 1)) (= (select |v_#length_16| 2) 37) (= (select |v_#length_16| 3) 12))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_87| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_17| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_17|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_17| 18446744073709551616)))) (exists ((|v_#valid_26| (Array Int Int))) (and (= (select |v_#valid_26| 4) 1) (= (select |v_#valid_26| 0) 0) (= |#valid| (store |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 1)) (= (select |v_#valid_26| 3) 1) (= (select |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) 0) (= (select |v_#valid_26| 1) 1) (= (select |v_#valid_26| 2) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_87| 1) 1) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_18| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_18| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_18|))) (= 0 (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 32)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107 |v_aws_linked_list_node_reset_#t~memset~res299.base_30|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 32) 0) (exists ((|v_#length_16| (Array Int Int))) (and (= 40 (select |v_#length_16| 4)) (= (store |v_#length_16| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 16) |#length|) (= 2 (select |v_#length_16| 1)) (= (select |v_#length_16| 2) 37) (= (select |v_#length_16| 3) 12))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_107) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_87| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_87| 1) 0) 48) (exists ((|v_#valid_26| (Array Int Int))) (and (= (select |v_#valid_26| 4) 1) (= (select |v_#valid_26| 0) 0) (= |#valid| (store |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 1)) (= (select |v_#valid_26| 3) 1) (= (select |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) 0) (= (select |v_#valid_26| 1) 1) (= (select |v_#valid_26| 2) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_87| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_18 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_18 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_18 Int) (|v_aws_is_mem_zeroed_#t~mem45_167| Int)) (and (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_18) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_18 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_167|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616) 9223372036854775807)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_18) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_18 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_167|))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_18 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_167| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18)))))) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:26:09,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:26:09,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:26:09,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-12-02 13:26:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989328534] [2023-12-02 13:26:09,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:26:09,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 13:26:09,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 13:26:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1507, Unknown=1, NotChecked=0, Total=1640 [2023-12-02 13:26:09,056 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:26:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:09,472 INFO L93 Difference]: Finished difference Result 101 states and 135 transitions. [2023-12-02 13:26:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:26:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-12-02 13:26:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:09,474 INFO L225 Difference]: With dead ends: 101 [2023-12-02 13:26:09,474 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 13:26:09,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=146, Invalid=1575, Unknown=1, NotChecked=0, Total=1722 [2023-12-02 13:26:09,476 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:09,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 264 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:26:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 13:26:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 13:26:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.372093023255814) internal successors, (59), 46 states have internal predecessors, (59), 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) [2023-12-02 13:26:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2023-12-02 13:26:09,509 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 43 [2023-12-02 13:26:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:09,509 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2023-12-02 13:26:09,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:26:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2023-12-02 13:26:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 13:26:09,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:09,511 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:09,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:26:09,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 13:26:09,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:26:09,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash -83597099, now seen corresponding path program 9 times [2023-12-02 13:26:09,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:09,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718789237] [2023-12-02 13:26:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:09,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 13:26:10,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:10,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718789237] [2023-12-02 13:26:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718789237] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:26:10,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131460169] [2023-12-02 13:26:10,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:26:10,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:26:10,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:26:10,369 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:26:10,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:26:10,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:26:10,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:26:10,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-02 13:26:10,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:26:10,922 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 [2023-12-02 13:26:10,952 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 [2023-12-02 13:26:10,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:10,989 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 [2023-12-02 13:26:11,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:11,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:26:11,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:11,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:26:11,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:11,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-02 13:26:11,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:11,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-02 13:26:11,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:11,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-12-02 13:26:11,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:11,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-12-02 13:26:11,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:11,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 138 treesize of output 113 [2023-12-02 13:26:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:14,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:26:41,081 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 141 treesize of output 137 [2023-12-02 13:26:41,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:41,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37011 treesize of output 37003 [2023-12-02 13:26:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:41,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131460169] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:26:41,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1367408037] [2023-12-02 13:26:41,507 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:26:41,508 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:26:41,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:26:41,508 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:26:41,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:26:41,547 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:26:43,174 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:26:43,844 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:26:43,860 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:26:44,773 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:26:44,986 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:27:24,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4587#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120 Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_97| (Array Int (Array Int Int)))) (or (and (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_19 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_19 Int) (|v_aws_is_mem_zeroed_#t~mem45_194| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_19 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_19 Int)) (and (not (= 0 (mod |v_aws_is_mem_zeroed_#t~mem45_194| 256))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_19) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_19 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_19 18446744073709551616)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_19 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_19) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_19 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_19 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_194|)) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_19 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_19) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_19 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_19 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_194|))))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_34| Int)) (or (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 1) 0) (exists ((|v_#length_17| (Array Int Int))) (and (= |#length| (store |v_#length_17| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 16)) (= 40 (select |v_#length_17| 4)) (= (select |v_#length_17| 2) 37) (= 12 (select |v_#length_17| 3)) (= 2 (select |v_#length_17| 1)))) (exists ((|v_#valid_27| (Array Int Int))) (and (= (select |v_#valid_27| 0) 0) (= (select |v_#valid_27| 2) 1) (= (select |v_#valid_27| 1) 1) (= (select |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) 0) (= (select |v_#valid_27| 3) 1) (= (select |v_#valid_27| 4) 1) (= (store |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 1) |#valid|))) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_20| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_20|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_20| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 32) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 0) 48) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 16)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120 |v_aws_linked_list_node_reset_#t~memset~res299.base_34|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 8) |#funAddr~s_can_fail_free_allocator.base|)) (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 1) 0) (exists ((|v_#length_17| (Array Int Int))) (and (= |#length| (store |v_#length_17| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 16)) (= 40 (select |v_#length_17| 4)) (= (select |v_#length_17| 2) 37) (= 12 (select |v_#length_17| 3)) (= 2 (select |v_#length_17| 1)))) (exists ((|v_#valid_27| (Array Int Int))) (and (= (select |v_#valid_27| 0) 0) (= (select |v_#valid_27| 2) 1) (= (select |v_#valid_27| 1) 1) (= (select |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) 0) (= (select |v_#valid_27| 3) 1) (= (select |v_#valid_27| 4) 1) (= (store |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 1) |#valid|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 32) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 0) 48) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 16)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120 |v_aws_linked_list_node_reset_#t~memset~res299.base_34|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_19| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_19| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_19|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 8) |#funAddr~s_can_fail_free_allocator.base|))))) (and (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_20 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_20 Int) (|v_aws_is_mem_zeroed_#t~mem45_194| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_20 Int)) (and (not (= 0 (mod |v_aws_is_mem_zeroed_#t~mem45_194| 256))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_20 18446744073709551616)) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_20) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_20 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_194|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20 18446744073709551616) 9223372036854775807)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_20) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_20 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_194|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20 18446744073709551616)))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_34| Int)) (or (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 1) 0) (exists ((|v_#length_17| (Array Int Int))) (and (= |#length| (store |v_#length_17| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 16)) (= 40 (select |v_#length_17| 4)) (= (select |v_#length_17| 2) 37) (= 12 (select |v_#length_17| 3)) (= 2 (select |v_#length_17| 1)))) (exists ((|v_#valid_27| (Array Int Int))) (and (= (select |v_#valid_27| 0) 0) (= (select |v_#valid_27| 2) 1) (= (select |v_#valid_27| 1) 1) (= (select |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) 0) (= (select |v_#valid_27| 3) 1) (= (select |v_#valid_27| 4) 1) (= (store |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 1) |#valid|))) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_20| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_20|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_20| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 32) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 0) 48) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 16)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120 |v_aws_linked_list_node_reset_#t~memset~res299.base_34|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 8) |#funAddr~s_can_fail_free_allocator.base|)) (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 1) 0) (exists ((|v_#length_17| (Array Int Int))) (and (= |#length| (store |v_#length_17| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 16)) (= 40 (select |v_#length_17| 4)) (= (select |v_#length_17| 2) 37) (= 12 (select |v_#length_17| 3)) (= 2 (select |v_#length_17| 1)))) (exists ((|v_#valid_27| (Array Int Int))) (and (= (select |v_#valid_27| 0) 0) (= (select |v_#valid_27| 2) 1) (= (select |v_#valid_27| 1) 1) (= (select |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) 0) (= (select |v_#valid_27| 3) 1) (= (select |v_#valid_27| 4) 1) (= (store |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 1) |#valid|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 32) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 0) 48) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 16)) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120 |v_aws_linked_list_node_reset_#t~memset~res299.base_34|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_19| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_19| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_19|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_97| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_97| 4) 8) |#funAddr~s_can_fail_free_allocator.base|))))))) (= |~#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 [2023-12-02 13:27:24,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:27:24,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:27:24,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 24] total 61 [2023-12-02 13:27:24,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648868908] [2023-12-02 13:27:24,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:27:24,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 13:27:24,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:27:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 13:27:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=5656, Unknown=22, NotChecked=0, Total=6006 [2023-12-02 13:27:24,139 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 61 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 59 states have internal predecessors, (86), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:27:26,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:28,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:30,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:32,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:34,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:37,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:39,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:41,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:43,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:45,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:48,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:27:56,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:02,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:07,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:12,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:14,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:18,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:21,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:23,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:27,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:29,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:31,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:33,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:35,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:37,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:28:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:41,609 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2023-12-02 13:28:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 13:28:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 59 states have internal predecessors, (86), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2023-12-02 13:28:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:41,611 INFO L225 Difference]: With dead ends: 132 [2023-12-02 13:28:41,611 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 13:28:41,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 80.6s TimeCoverageRelationStatistics Valid=579, Invalid=8705, Unknown=28, NotChecked=0, Total=9312 [2023-12-02 13:28:41,614 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 66 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 32 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:41,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 1002 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2063 Invalid, 25 Unknown, 0 Unchecked, 59.9s Time] [2023-12-02 13:28:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 13:28:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2023-12-02 13:28:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.391304347826087) internal successors, (64), 49 states have internal predecessors, (64), 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) [2023-12-02 13:28:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2023-12-02 13:28:41,638 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 44 [2023-12-02 13:28:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:41,638 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2023-12-02 13:28:41,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 59 states have internal predecessors, (86), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:28:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2023-12-02 13:28:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 13:28:41,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:41,640 INFO L195 NwaCegarLoop]: trace histogram [11, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:41,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:41,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 13:28:41,840 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:41,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash -896914160, now seen corresponding path program 1 times [2023-12-02 13:28:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:28:41,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028515583] [2023-12-02 13:28:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:41,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:28:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 13:28:42,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:28:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028515583] [2023-12-02 13:28:42,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028515583] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:28:42,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:28:42,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:28:42,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309694114] [2023-12-02 13:28:42,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:28:42,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:28:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:28:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:28:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:28:42,020 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 13:28:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:42,087 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2023-12-02 13:28:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:28:42,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 48 [2023-12-02 13:28:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:42,088 INFO L225 Difference]: With dead ends: 72 [2023-12-02 13:28:42,088 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 13:28:42,089 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 [2023-12-02 13:28:42,089 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:42,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 131 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:28:42,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 13:28:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-12-02 13:28:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 49 states have internal predecessors, (62), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:28:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2023-12-02 13:28:42,115 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 48 [2023-12-02 13:28:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:42,116 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2023-12-02 13:28:42,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 13:28:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2023-12-02 13:28:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 13:28:42,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:42,117 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 13:28:42,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:28:42,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1659253947, now seen corresponding path program 10 times [2023-12-02 13:28:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:28:42,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65205455] [2023-12-02 13:28:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:42,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:28:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 13:28:42,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:28:42,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65205455] [2023-12-02 13:28:42,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65205455] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:28:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385929680] [2023-12-02 13:28:42,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:28:42,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:28:42,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:28:42,712 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:28:42,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:28:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:43,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 92 conjunts are in the unsatisfiable core [2023-12-02 13:28:43,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:43,374 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 [2023-12-02 13:28:43,404 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 [2023-12-02 13:28:43,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:43,443 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 [2023-12-02 13:28:43,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:43,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:28:43,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:43,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:28:43,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:43,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-02 13:28:43,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:43,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-02 13:28:43,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:43,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-12-02 13:28:43,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:43,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-12-02 13:28:44,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:44,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-12-02 13:28:44,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:28:44,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 153 treesize of output 125 [2023-12-02 13:28:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:46,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:55,787 WARN L293 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 132 DAG size of output: 129 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 13:29:18,979 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 153 treesize of output 149 [2023-12-02 13:29:18,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:29:18,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70703 treesize of output 70695 [2023-12-02 13:29:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:29:19,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385929680] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:29:19,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659325415] [2023-12-02 13:29:19,808 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:29:19,808 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:29:19,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:29:19,808 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:29:19,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:29:19,841 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:29:21,333 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:29:21,976 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:29:21,990 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:29:22,860 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:29:23,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:30:01,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5478#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_107| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133 Int)) (or (and (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_21 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_21 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 Int) (|v_aws_is_mem_zeroed_#t~mem45_226| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_21 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_226| 256) 0)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_21) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_21 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_226|)) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_21) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_21 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_226|))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_21 18446744073709551616)))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_38| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 1) 0) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 8)) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 0)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 32) 0) (exists ((|v_#length_18| (Array Int Int))) (and (= 12 (select |v_#length_18| 3)) (= |#length| (store |v_#length_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| 16)) (= 40 (select |v_#length_18| 4)) (= 2 (select |v_#length_18| 1)) (= (select |v_#length_18| 2) 37))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (exists ((|v_#valid_28| (Array Int Int))) (and (= (select |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107|) 0) (= (select |v_#valid_28| 3) 1) (= (select |v_#valid_28| 1) 1) (= (select |v_#valid_28| 2) 1) (= (select |v_#valid_28| 0) 0) (= (store |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| 1) |#valid|) (= (select |v_#valid_28| 4) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133 |v_aws_linked_list_node_reset_#t~memset~res299.base_38|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_22| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_22| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_22|)))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 1) 0) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 8)) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 0)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 16)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_21| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_21| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_21|))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 32) 0) (exists ((|v_#length_18| (Array Int Int))) (and (= 12 (select |v_#length_18| 3)) (= |#length| (store |v_#length_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| 16)) (= 40 (select |v_#length_18| 4)) (= 2 (select |v_#length_18| 1)) (= (select |v_#length_18| 2) 37))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (exists ((|v_#valid_28| (Array Int Int))) (and (= (select |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107|) 0) (= (select |v_#valid_28| 3) 1) (= (select |v_#valid_28| 1) 1) (= (select |v_#valid_28| 2) 1) (= (select |v_#valid_28| 0) 0) (= (store |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| 1) |#valid|) (= (select |v_#valid_28| 4) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133 |v_aws_linked_list_node_reset_#t~memset~res299.base_38|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107|))))) (and (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_22 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 Int) (|v_aws_is_mem_zeroed_#t~mem45_226| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_22 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_22 Int)) (and (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_22) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_22 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_226|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_22) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_22 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_226|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616) 9223372036854775807))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_226| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_22 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_38| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 1) 0) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 8)) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 0)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 32) 0) (exists ((|v_#length_18| (Array Int Int))) (and (= 12 (select |v_#length_18| 3)) (= |#length| (store |v_#length_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| 16)) (= 40 (select |v_#length_18| 4)) (= 2 (select |v_#length_18| 1)) (= (select |v_#length_18| 2) 37))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (exists ((|v_#valid_28| (Array Int Int))) (and (= (select |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107|) 0) (= (select |v_#valid_28| 3) 1) (= (select |v_#valid_28| 1) 1) (= (select |v_#valid_28| 2) 1) (= (select |v_#valid_28| 0) 0) (= (store |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| 1) |#valid|) (= (select |v_#valid_28| 4) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133 |v_aws_linked_list_node_reset_#t~memset~res299.base_38|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_22| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_22| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_22|)))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 1) 0) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 8)) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 0)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 16)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_21| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_21| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_21|))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 32) 0) (exists ((|v_#length_18| (Array Int Int))) (and (= 12 (select |v_#length_18| 3)) (= |#length| (store |v_#length_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| 16)) (= 40 (select |v_#length_18| 4)) (= 2 (select |v_#length_18| 1)) (= (select |v_#length_18| 2) 37))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_107| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (exists ((|v_#valid_28| (Array Int Int))) (and (= (select |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107|) 0) (= (select |v_#valid_28| 3) 1) (= (select |v_#valid_28| 1) 1) (= (select |v_#valid_28| 2) 1) (= (select |v_#valid_28| 0) 0) (= (store |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107| 1) |#valid|) (= (select |v_#valid_28| 4) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_133 |v_aws_linked_list_node_reset_#t~memset~res299.base_38|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_107| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_107|))))))) (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:30:01,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:30:01,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:30:01,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 30, 26] total 66 [2023-12-02 13:30:01,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070946269] [2023-12-02 13:30:01,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:30:01,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-12-02 13:30:01,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:30:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-12-02 13:30:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=6420, Unknown=23, NotChecked=0, Total=6806 [2023-12-02 13:30:01,968 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 66 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 64 states have internal predecessors, (93), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:30:04,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:06,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:08,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:10,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:12,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:15,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:17,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:19,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:21,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:23,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:25,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:28,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:33,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:38,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:40,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:42,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:44,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:30:49,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:30:49,300 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2023-12-02 13:30:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 13:30:49,301 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 64 states have internal predecessors, (93), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2023-12-02 13:30:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:30:49,302 INFO L225 Difference]: With dead ends: 135 [2023-12-02 13:30:49,303 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 13:30:49,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 72.4s TimeCoverageRelationStatistics Valid=529, Invalid=8758, Unknown=25, NotChecked=0, Total=9312 [2023-12-02 13:30:49,305 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 29 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:30:49,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1124 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2372 Invalid, 17 Unknown, 0 Unchecked, 40.5s Time] [2023-12-02 13:30:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 13:30:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2023-12-02 13:30:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 52 states have internal predecessors, (67), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:30:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2023-12-02 13:30:49,333 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 47 [2023-12-02 13:30:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:30:49,333 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2023-12-02 13:30:49,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 64 states have internal predecessors, (93), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:30:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2023-12-02 13:30:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 13:30:49,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:30:49,334 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:30:49,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 13:30:49,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 13:30:49,535 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:30:49,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:30:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1525493129, now seen corresponding path program 1 times [2023-12-02 13:30:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:30:49,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839955229] [2023-12-02 13:30:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:30:49,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:30:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:30:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:30:50,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:30:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839955229] [2023-12-02 13:30:50,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839955229] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:30:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217171525] [2023-12-02 13:30:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:30:50,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:30:50,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:30:50,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:30:50,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:30:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:30:50,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 13:30:50,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:30:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 13:30:50,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:30:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-12-02 13:30:50,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217171525] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:30:50,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932178033] [2023-12-02 13:30:50,664 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:30:50,664 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:30:50,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:30:50,665 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:30:50,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:30:51,223 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:30:53,988 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:30:54,001 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 12 for LOIs [2023-12-02 13:30:54,008 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 20 for LOIs [2023-12-02 13:30:54,096 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:30:54,298 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:31:02,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6133#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:31:02,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:31:02,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:02,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 6] total 27 [2023-12-02 13:31:02,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862813709] [2023-12-02 13:31:02,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:02,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 13:31:02,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 13:31:02,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2186, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 13:31:02,803 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 13:31:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:04,151 INFO L93 Difference]: Finished difference Result 126 states and 162 transitions. [2023-12-02 13:31:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 13:31:04,151 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 50 [2023-12-02 13:31:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:04,152 INFO L225 Difference]: With dead ends: 126 [2023-12-02 13:31:04,152 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 13:31:04,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=280, Invalid=4010, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 13:31:04,153 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:04,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 341 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 13:31:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2023-12-02 13:31:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:31:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-12-02 13:31:04,186 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 50 [2023-12-02 13:31:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:04,186 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-12-02 13:31:04,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 13:31:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-12-02 13:31:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 13:31:04,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:04,187 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:04,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 13:31:04,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 13:31:04,388 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:04,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash -662617337, now seen corresponding path program 11 times [2023-12-02 13:31:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:04,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851877958] [2023-12-02 13:31:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 13:31:05,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:05,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851877958] [2023-12-02 13:31:05,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851877958] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:05,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355711236] [2023-12-02 13:31:05,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:31:05,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:05,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:05,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:05,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:31:16,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 13:31:16,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:31:16,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 103 conjunts are in the unsatisfiable core [2023-12-02 13:31:16,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:17,044 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 [2023-12-02 13:31:17,081 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 23 treesize of output 22 [2023-12-02 13:31:17,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,135 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 32 treesize of output 34 [2023-12-02 13:31:17,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2023-12-02 13:31:17,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2023-12-02 13:31:17,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 70 [2023-12-02 13:31:17,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 82 [2023-12-02 13:31:17,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 94 [2023-12-02 13:31:17,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 106 [2023-12-02 13:31:17,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 118 [2023-12-02 13:31:17,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:17,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 130 [2023-12-02 13:31:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 13:31:18,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:18,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355711236] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:18,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138383896] [2023-12-02 13:31:18,436 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:31:18,436 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:18,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:31:18,437 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:31:18,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:31:18,483 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:31:20,062 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:31:20,702 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:31:20,717 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:31:21,570 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:31:21,771 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:31:31,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6673#(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) (= ~tl_last_error~0 0) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_129| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161 Int)) (or (and (exists ((v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_30 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_30 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_30 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 Int) (|v_aws_is_mem_zeroed_#t~mem45_267| Int)) (and (<= (+ 1 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616)) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_30 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_267| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30) (or (and (= |v_aws_is_mem_zeroed_#t~mem45_267| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_30) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_30 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616))) (and (= |v_aws_is_mem_zeroed_#t~mem45_267| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_30) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_30 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616) 9223372036854775807))))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_46| Int)) (or (and (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (exists ((|v_#length_20| (Array Int Int))) (and (= 2 (select |v_#length_20| 1)) (= 40 (select |v_#length_20| 4)) (= (select |v_#length_20| 2) 37) (= (select |v_#length_20| 3) 12) (= |#length| (store |v_#length_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| 16)))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161 |v_aws_linked_list_node_reset_#t~memset~res299.base_46|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_129| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161) (exists ((|v_#valid_30| (Array Int Int))) (and (= (select |v_#valid_30| 2) 1) (= (select |v_#valid_30| 0) 0) (= (select |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133|) 0) (= 1 (select |v_#valid_30| 4)) (= (select |v_#valid_30| 1) 1) (= (select |v_#valid_30| 3) 1) (= |#valid| (store |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| 1)))) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_28| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_28| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_28|))) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_129| 1) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 24)) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 8))) (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_27| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_27|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_27| 18446744073709551616)))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (exists ((|v_#length_20| (Array Int Int))) (and (= 2 (select |v_#length_20| 1)) (= 40 (select |v_#length_20| 4)) (= (select |v_#length_20| 2) 37) (= (select |v_#length_20| 3) 12) (= |#length| (store |v_#length_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| 16)))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161 |v_aws_linked_list_node_reset_#t~memset~res299.base_46|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_129| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161) (exists ((|v_#valid_30| (Array Int Int))) (and (= (select |v_#valid_30| 2) 1) (= (select |v_#valid_30| 0) 0) (= (select |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133|) 0) (= 1 (select |v_#valid_30| 4)) (= (select |v_#valid_30| 1) 1) (= (select |v_#valid_30| 3) 1) (= |#valid| (store |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| 1)))) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_129| 1) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 24)) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 8)))))) (and (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_29 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_29 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_29 Int) (|v_aws_is_mem_zeroed_#t~mem45_267| Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_29 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_267| 256) 0)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_29) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_29 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_267|)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_29) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_29 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_267|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616)))))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_46| Int)) (or (and (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (exists ((|v_#length_20| (Array Int Int))) (and (= 2 (select |v_#length_20| 1)) (= 40 (select |v_#length_20| 4)) (= (select |v_#length_20| 2) 37) (= (select |v_#length_20| 3) 12) (= |#length| (store |v_#length_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| 16)))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161 |v_aws_linked_list_node_reset_#t~memset~res299.base_46|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_129| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161) (exists ((|v_#valid_30| (Array Int Int))) (and (= (select |v_#valid_30| 2) 1) (= (select |v_#valid_30| 0) 0) (= (select |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133|) 0) (= 1 (select |v_#valid_30| 4)) (= (select |v_#valid_30| 1) 1) (= (select |v_#valid_30| 3) 1) (= |#valid| (store |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| 1)))) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_28| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_28| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_28|))) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_129| 1) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 24)) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 8))) (and (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_27| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_27|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_27| 18446744073709551616)))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (exists ((|v_#length_20| (Array Int Int))) (and (= 2 (select |v_#length_20| 1)) (= 40 (select |v_#length_20| 4)) (= (select |v_#length_20| 2) 37) (= (select |v_#length_20| 3) 12) (= |#length| (store |v_#length_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| 16)))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161 |v_aws_linked_list_node_reset_#t~memset~res299.base_46|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_129| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_129| 1) 1) 0) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_161) (exists ((|v_#valid_30| (Array Int Int))) (and (= (select |v_#valid_30| 2) 1) (= (select |v_#valid_30| 0) 0) (= (select |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133|) 0) (= 1 (select |v_#valid_30| 4)) (= (select |v_#valid_30| 1) 1) (= (select |v_#valid_30| 3) 1) (= |#valid| (store |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_133| 1)))) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_129| 1) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 24)) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_129| 4) 8)))))))))' at error location [2023-12-02 13:31:31,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:31:31,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:31:31,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 34 [2023-12-02 13:31:31,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912292350] [2023-12-02 13:31:31,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:31,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 13:31:31,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 13:31:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2495, Unknown=1, NotChecked=0, Total=2652 [2023-12-02 13:31:31,688 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 34 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 33 states have internal predecessors, (49), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 13:31:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:32,436 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2023-12-02 13:31:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 13:31:32,436 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 33 states have internal predecessors, (49), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2023-12-02 13:31:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:32,437 INFO L225 Difference]: With dead ends: 113 [2023-12-02 13:31:32,437 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 13:31:32,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=170, Invalid=2691, Unknown=1, NotChecked=0, Total=2862 [2023-12-02 13:31:32,438 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:32,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 455 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:31:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 13:31:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-02 13:31:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:31:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2023-12-02 13:31:32,468 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 51 [2023-12-02 13:31:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:32,468 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2023-12-02 13:31:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 33 states have internal predecessors, (49), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 13:31:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2023-12-02 13:31:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 13:31:32,469 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:32,469 INFO L195 NwaCegarLoop]: trace histogram [14, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:32,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 13:31:32,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 13:31:32,669 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:32,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1739242899, now seen corresponding path program 12 times [2023-12-02 13:31:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:32,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641496105] [2023-12-02 13:31:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 13:31:33,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641496105] [2023-12-02 13:31:33,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641496105] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989830052] [2023-12-02 13:31:33,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:31:33,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:33,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:33,336 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:33,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:31:34,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:31:34,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:31:34,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-02 13:31:34,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:34,276 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 [2023-12-02 13:31:34,308 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 [2023-12-02 13:31:34,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:34,345 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 [2023-12-02 13:31:34,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:34,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:31:34,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:34,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:31:34,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:34,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-02 13:31:34,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:34,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-02 13:31:34,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:34,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-12-02 13:31:34,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:34,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-12-02 13:31:34,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:34,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-12-02 13:31:35,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:35,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-12-02 13:31:35,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:35,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-12-02 13:31:35,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:35,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2023-12-02 13:31:35,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:35,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 198 treesize of output 161 [2023-12-02 13:31:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:39,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:32:00,256 WARN L293 SmtUtils]: Spent 17.53s on a formula simplification. DAG size of input: 165 DAG size of output: 162 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 13:32:31,355 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 189 treesize of output 185 [2023-12-02 13:32:31,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:32:31,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 577235 treesize of output 577227 [2023-12-02 13:32:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:32,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989830052] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:32:32,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636651741] [2023-12-02 13:32:32,639 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:32:32,639 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:32:32,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:32:32,639 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:32:32,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:32:32,673 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:32:34,216 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:32:34,860 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:32:34,874 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:32:35,740 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:32:35,941 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:15,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7352#(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_139| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174 Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| (Array Int (Array Int Int)))) (or (and (exists ((|v_aws_is_mem_zeroed_#t~mem45_298| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_31 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_31 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_31 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 Int)) (and (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem45_298| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_31) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_31 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616) (- 18446744073709551616))))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_31) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_31 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_298|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616) 9223372036854775807))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_298| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_31 18446744073709551616)))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_50| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_30| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_30| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_30|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 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_139| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 24)) (exists ((|v_#length_21| (Array Int Int))) (and (= |#length| (store |v_#length_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| 16)) (= 2 (select |v_#length_21| 1)) (= (select |v_#length_21| 2) 37) (= 12 (select |v_#length_21| 3)) (= 40 (select |v_#length_21| 4)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 32) 0) (exists ((|v_#valid_31| (Array Int Int))) (and (= (select |v_#valid_31| 4) 1) (= (select |v_#valid_31| 0) 0) (= (select |v_#valid_31| 2) 1) (= (select |v_#valid_31| 1) 1) (= (select |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143|) 0) (= (store |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| 1) |#valid|) (= (select |v_#valid_31| 3) 1))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174 |v_aws_linked_list_node_reset_#t~memset~res299.base_50|)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_29| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_29|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_29| 18446744073709551616)))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 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_139| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 24)) (exists ((|v_#length_21| (Array Int Int))) (and (= |#length| (store |v_#length_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| 16)) (= 2 (select |v_#length_21| 1)) (= (select |v_#length_21| 2) 37) (= 12 (select |v_#length_21| 3)) (= 40 (select |v_#length_21| 4)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 32) 0) (exists ((|v_#valid_31| (Array Int Int))) (and (= (select |v_#valid_31| 4) 1) (= (select |v_#valid_31| 0) 0) (= (select |v_#valid_31| 2) 1) (= (select |v_#valid_31| 1) 1) (= (select |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143|) 0) (= (store |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| 1) |#valid|) (= (select |v_#valid_31| 3) 1))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174 |v_aws_linked_list_node_reset_#t~memset~res299.base_50|))))) (and (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_32 Int) (|v_aws_is_mem_zeroed_#t~mem45_298| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_32 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_32 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_32) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_32 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_298|)) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_32) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_32 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_298|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_298| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_32 18446744073709551616)))) (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_50| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_30| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_30| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_30|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 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_139| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 24)) (exists ((|v_#length_21| (Array Int Int))) (and (= |#length| (store |v_#length_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| 16)) (= 2 (select |v_#length_21| 1)) (= (select |v_#length_21| 2) 37) (= 12 (select |v_#length_21| 3)) (= 40 (select |v_#length_21| 4)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 32) 0) (exists ((|v_#valid_31| (Array Int Int))) (and (= (select |v_#valid_31| 4) 1) (= (select |v_#valid_31| 0) 0) (= (select |v_#valid_31| 2) 1) (= (select |v_#valid_31| 1) 1) (= (select |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143|) 0) (= (store |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| 1) |#valid|) (= (select |v_#valid_31| 3) 1))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174 |v_aws_linked_list_node_reset_#t~memset~res299.base_50|)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_29| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_29|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_29| 18446744073709551616)))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 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_139| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 24)) (exists ((|v_#length_21| (Array Int Int))) (and (= |#length| (store |v_#length_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| 16)) (= 2 (select |v_#length_21| 1)) (= (select |v_#length_21| 2) 37) (= 12 (select |v_#length_21| 3)) (= 40 (select |v_#length_21| 4)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_139| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_139| 4) 32) 0) (exists ((|v_#valid_31| (Array Int Int))) (and (= (select |v_#valid_31| 4) 1) (= (select |v_#valid_31| 0) 0) (= (select |v_#valid_31| 2) 1) (= (select |v_#valid_31| 1) 1) (= (select |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143|) 0) (= (store |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_143| 1) |#valid|) (= (select |v_#valid_31| 3) 1))) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_174 |v_aws_linked_list_node_reset_#t~memset~res299.base_50|))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:33:15,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:33:15,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:15,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 34, 30] total 77 [2023-12-02 13:33:15,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102495776] [2023-12-02 13:33:15,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:33:15,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-12-02 13:33:15,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:15,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-12-02 13:33:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=8170, Unknown=26, NotChecked=0, Total=8742 [2023-12-02 13:33:15,994 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 77 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 75 states have internal predecessors, (106), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:33:18,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:20,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:22,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:24,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:27,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:29,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:31,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:33,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:36,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:38,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:40,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:42,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:44,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:47,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:49,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:33:59,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:34:07,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:34:10,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:34:12,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:34:14,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:34:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:34:20,788 INFO L93 Difference]: Finished difference Result 138 states and 169 transitions. [2023-12-02 13:34:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 13:34:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 75 states have internal predecessors, (106), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2023-12-02 13:34:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:34:20,789 INFO L225 Difference]: With dead ends: 138 [2023-12-02 13:34:20,790 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 13:34:20,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 84.7s TimeCoverageRelationStatistics Valid=742, Invalid=10786, Unknown=28, NotChecked=0, Total=11556 [2023-12-02 13:34:20,792 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 2628 mSolverCounterSat, 20 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2628 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:34:20,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1281 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2628 Invalid, 20 Unknown, 0 Unchecked, 55.5s Time] [2023-12-02 13:34:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 13:34:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2023-12-02 13:34:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 57 states have internal predecessors, (70), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:34:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2023-12-02 13:34:20,831 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 52 [2023-12-02 13:34:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:34:20,831 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2023-12-02 13:34:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 75 states have internal predecessors, (106), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:34:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2023-12-02 13:34:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 13:34:20,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:34:20,832 INFO L195 NwaCegarLoop]: trace histogram [15, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:34:20,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 13:34:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:34:21,033 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:34:21,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:34:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1052085843, now seen corresponding path program 13 times [2023-12-02 13:34:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:34:21,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763946121] [2023-12-02 13:34:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:34:21,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:34:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:34:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 13:34:21,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:34:21,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763946121] [2023-12-02 13:34:21,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763946121] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:34:21,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897200649] [2023-12-02 13:34:21,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:34:21,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:34:21,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:34:21,822 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:34:21,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f7ce735-cfa7-4238-9084-cc756d42fe66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 13:34:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:34:22,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 117 conjunts are in the unsatisfiable core [2023-12-02 13:34:22,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:34:22,680 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 [2023-12-02 13:34:22,723 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 [2023-12-02 13:34:22,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:22,785 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 [2023-12-02 13:34:22,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:22,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:34:22,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:22,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:34:23,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:23,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-02 13:34:23,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:23,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-02 13:34:23,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:23,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-12-02 13:34:23,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:23,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-12-02 13:34:23,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:23,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-12-02 13:34:23,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:23,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-12-02 13:34:23,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:23,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-12-02 13:34:23,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:23,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2023-12-02 13:34:24,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:24,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2023-12-02 13:34:24,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:34:24,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 213 treesize of output 173 [2023-12-02 13:34:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:34:29,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:34:55,304 WARN L293 SmtUtils]: Spent 22.58s on a formula simplification. DAG size of input: 178 DAG size of output: 173 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 13:35:29,803 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 199 treesize of output 195 [2023-12-02 13:35:29,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:35:29,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1163689 treesize of output 1163683 [2023-12-02 13:35:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:35:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897200649] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:35:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116367180] [2023-12-02 13:35:31,205 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:35:31,205 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:35:31,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:35:31,205 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:35:31,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:35:31,236 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2023-12-02 13:35:32,725 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 182 for LOIs [2023-12-02 13:35:33,373 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-12-02 13:35:33,389 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 124 for LOIs [2023-12-02 13:35:34,349 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2023-12-02 13:35:34,541 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:36:14,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8109#(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_149| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187 Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| (Array Int (Array Int Int)))) (or (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_54| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_149| 1) 0) 48) (exists ((|v_#length_22| (Array Int Int))) (and (= (select |v_#length_22| 1) 2) (= (select |v_#length_22| 3) 12) (= 40 (select |v_#length_22| 4)) (= (select |v_#length_22| 2) 37) (= (store |v_#length_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| 16) |#length|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 32) 0) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187 |v_aws_linked_list_node_reset_#t~memset~res299.base_54|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 0)) (exists ((|v_#valid_32| (Array Int Int))) (and (= (select |v_#valid_32| 1) 1) (= (select |v_#valid_32| 2) 1) (= (select |v_#valid_32| 0) 0) (= (select |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153|) 0) (= (select |v_#valid_32| 4) 1) (= (store |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| 1) |#valid|) (= (select |v_#valid_32| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 24)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_32| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_32| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_32|))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_149| 1) 1) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153|)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_149| 1) 0) 48) (exists ((|v_#length_22| (Array Int Int))) (and (= (select |v_#length_22| 1) 2) (= (select |v_#length_22| 3) 12) (= 40 (select |v_#length_22| 4)) (= (select |v_#length_22| 2) 37) (= (store |v_#length_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| 16) |#length|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 32) 0) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187 |v_aws_linked_list_node_reset_#t~memset~res299.base_54|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_31| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_31|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_31| 18446744073709551616)))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 0)) (exists ((|v_#valid_32| (Array Int Int))) (and (= (select |v_#valid_32| 1) 1) (= (select |v_#valid_32| 2) 1) (= (select |v_#valid_32| 0) 0) (= (select |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153|) 0) (= (select |v_#valid_32| 4) 1) (= (store |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| 1) |#valid|) (= (select |v_#valid_32| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_149| 1) 1) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153|)))) (exists ((|v_aws_is_mem_zeroed_#t~mem45_331| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_34 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_34 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_34 Int)) (and (or (and (= |v_aws_is_mem_zeroed_#t~mem45_331| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_34) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_34 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616) 9223372036854775807)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_34) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_34 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_331|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_331| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_34 18446744073709551616))))) (and (exists ((|v_aws_linked_list_node_reset_#t~memset~res299.base_54| Int)) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_149| 1) 0) 48) (exists ((|v_#length_22| (Array Int Int))) (and (= (select |v_#length_22| 1) 2) (= (select |v_#length_22| 3) 12) (= 40 (select |v_#length_22| 4)) (= (select |v_#length_22| 2) 37) (= (store |v_#length_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| 16) |#length|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 32) 0) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187 |v_aws_linked_list_node_reset_#t~memset~res299.base_54|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 0)) (exists ((|v_#valid_32| (Array Int Int))) (and (= (select |v_#valid_32| 1) 1) (= (select |v_#valid_32| 2) 1) (= (select |v_#valid_32| 0) 0) (= (select |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153|) 0) (= (select |v_#valid_32| 4) 1) (= (store |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| 1) |#valid|) (= (select |v_#valid_32| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 24)) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_32| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_32| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_32|))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_149| 1) 1) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153|)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_149| 1) 0) 48) (exists ((|v_#length_22| (Array Int Int))) (and (= (select |v_#length_22| 1) 2) (= (select |v_#length_22| 3) 12) (= 40 (select |v_#length_22| 4)) (= (select |v_#length_22| 2) 37) (= (store |v_#length_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| 16) |#length|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 32) 0) (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187 |v_aws_linked_list_node_reset_#t~memset~res299.base_54|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_187) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_31| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_31|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr681_BEFORE_RETURN_31| 18446744073709551616)))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 0)) (exists ((|v_#valid_32| (Array Int Int))) (and (= (select |v_#valid_32| 1) 1) (= (select |v_#valid_32| 2) 1) (= (select |v_#valid_32| 0) 0) (= (select |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153|) 0) (= (select |v_#valid_32| 4) 1) (= (store |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153| 1) |#valid|) (= (select |v_#valid_32| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_149| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_149| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_149| 1) 1) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_153|)))) (exists ((|v_aws_is_mem_zeroed_#t~mem45_331| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_33 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_33 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_33 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem45_331| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_33 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_33) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_33 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_331|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_33) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_33 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem45_331|)))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0))' at error location [2023-12-02 13:36:14,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:36:14,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:36:14,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 36, 32] total 82 [2023-12-02 13:36:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599175423] [2023-12-02 13:36:14,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:36:14,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-12-02 13:36:14,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:36:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-12-02 13:36:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=9170, Unknown=27, NotChecked=0, Total=9702 [2023-12-02 13:36:14,877 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 82 states, 79 states have (on average 1.4303797468354431) internal successors, (113), 80 states have internal predecessors, (113), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:36:16,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:19,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:21,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:23,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:26,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:28,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:30,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:32,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:35,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:37,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:36:39,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]