./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:42,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:42,850 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:59:42,856 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:42,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:42,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:42,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:42,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:42,887 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:42,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:42,888 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:42,889 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:42,890 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:42,890 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:42,891 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:42,891 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:42,892 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:42,892 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:42,893 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:42,893 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:42,894 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:42,895 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:42,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:42,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:59:42,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:42,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:42,897 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:59:42,897 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:42,898 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:59:42,898 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:59:42,899 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:42,899 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:42,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:42,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:42,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:42,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:42,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:59:42,901 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:42,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:42,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:59:42,902 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:42,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:42,902 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_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2023-11-12 00:59:43,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:43,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:43,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:43,232 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:43,233 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:43,234 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2023-11-12 00:59:46,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:46,939 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:46,940 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2023-11-12 00:59:46,982 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/data/2d3db52c4/87d24c14ded847da93c2315b41f4383d/FLAGf01aa9fca [2023-11-12 00:59:47,001 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/data/2d3db52c4/87d24c14ded847da93c2315b41f4383d [2023-11-12 00:59:47,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:47,011 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:47,013 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:47,014 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:47,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:47,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5ad2e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47, skipping insertion in model container [2023-11-12 00:59:47,022 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,135 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:47,439 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_d0d75e79-1ada-49c7-92da-2bbd7b81c564/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2023-11-12 00:59:47,449 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_d0d75e79-1ada-49c7-92da-2bbd7b81c564/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2023-11-12 00:59:48,590 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,592 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,593 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,594 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,595 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,613 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,614 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,623 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,625 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,634 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,636 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,638 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:48,639 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,181 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:59:49,182 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:59:49,183 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:59:49,185 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:59:49,186 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:59:49,187 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:59:49,187 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:59:49,188 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:59:49,189 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:59:49,189 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:59:49,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:49,386 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:49,413 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_d0d75e79-1ada-49c7-92da-2bbd7b81c564/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2023-11-12 00:59:49,415 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_d0d75e79-1ada-49c7-92da-2bbd7b81c564/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2023-11-12 00:59:49,494 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,497 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,502 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,503 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,504 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,513 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,522 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,523 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,524 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,526 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,527 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,528 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,528 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:49,592 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:59:49,593 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:59:49,594 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:59:49,595 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:59:49,602 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:59:49,604 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:59:49,605 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:59:49,605 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:59:49,607 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:59:49,607 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:59:49,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:49,914 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,914 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,915 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,915 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,916 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,916 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,916 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,916 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,917 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,918 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,918 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,918 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,918 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,919 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,919 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,919 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:49,927 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:49,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49 WrapperNode [2023-11-12 00:59:49,928 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:49,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:49,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:49,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:49,934 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,013 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,078 INFO L138 Inliner]: procedures = 678, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2023-11-12 00:59:50,079 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:50,079 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:50,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:50,080 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:50,089 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,134 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:50,159 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:50,159 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:50,159 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:50,160 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (1/1) ... [2023-11-12 00:59:50,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:50,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:50,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:50,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:50,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:59:50,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:59:50,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:59:50,240 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-12 00:59:50,240 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-12 00:59:50,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:59:50,240 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-11-12 00:59:50,240 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-11-12 00:59:50,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:50,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:59:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:50,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:59:50,241 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:59:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:59:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:59:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:59:50,241 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:59:50,241 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:59:50,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:50,560 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:50,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:50,922 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:51,041 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:51,042 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:59:51,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:51 BoogieIcfgContainer [2023-11-12 00:59:51,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:51,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:51,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:51,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:51,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:47" (1/3) ... [2023-11-12 00:59:51,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6141d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:51, skipping insertion in model container [2023-11-12 00:59:51,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:49" (2/3) ... [2023-11-12 00:59:51,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6141d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:51, skipping insertion in model container [2023-11-12 00:59:51,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:51" (3/3) ... [2023-11-12 00:59:51,055 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2023-11-12 00:59:51,076 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:51,077 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:51,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:51,152 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;@6913a843, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:51,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 00:59:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 00:59:51,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:51,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-11-12 00:59:51,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:51,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2023-11-12 00:59:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:51,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201951651] [2023-11-12 00:59:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:59:52,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201951651] [2023-11-12 00:59:52,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201951651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:52,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422671774] [2023-11-12 00:59:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:52,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:52,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:52,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-12 00:59:52,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:52,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-12 00:59:52,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-12 00:59:52,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2023-11-12 00:59:52,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-11-12 00:59:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:59:56,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:56,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422671774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:56,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:56,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2023-11-12 00:59:56,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400292969] [2023-11-12 00:59:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:56,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:59:56,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:56,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:59:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:59:56,770 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 00:59:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:57,631 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2023-11-12 00:59:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:59:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2023-11-12 00:59:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:57,643 INFO L225 Difference]: With dead ends: 121 [2023-11-12 00:59:57,644 INFO L226 Difference]: Without dead ends: 79 [2023-11-12 00:59:57,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:59:57,651 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 27 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:57,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 326 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:59:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-12 00:59:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-11-12 00:59:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 43 states have (on average 1.302325581395349) internal successors, (56), 45 states have internal predecessors, (56), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 00:59:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2023-11-12 00:59:57,712 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 37 [2023-11-12 00:59:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:57,713 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2023-11-12 00:59:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 00:59:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2023-11-12 00:59:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 00:59:57,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:57,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-11-12 00:59:57,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:57,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:57,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:57,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2094600787, now seen corresponding path program 1 times [2023-11-12 00:59:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:57,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869795440] [2023-11-12 00:59:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:59:58,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:58,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869795440] [2023-11-12 00:59:58,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869795440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:58,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420363589] [2023-11-12 00:59:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:58,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:58,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:58,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:58,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:58,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-12 00:59:58,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:58,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-12 00:59:58,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-12 00:59:58,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2023-11-12 00:59:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:58,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-12 00:59:58,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2023-11-12 00:59:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:58,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-12 00:59:58,978 INFO L322 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2023-11-12 00:59:58,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 171 treesize of output 163 [2023-11-12 00:59:59,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 137 [2023-11-12 00:59:59,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:59:59,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 21 [2023-11-12 01:00:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:07,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:13,085 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:13,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 364 treesize of output 449 [2023-11-12 01:00:13,232 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-11-12 01:00:13,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 58 [2023-11-12 01:00:13,271 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-11-12 01:00:13,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 58 [2023-11-12 01:00:13,316 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-11-12 01:00:13,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 58 [2023-11-12 01:00:13,352 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-11-12 01:00:13,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 58 [2023-11-12 01:00:13,394 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-11-12 01:00:13,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 58 [2023-11-12 01:00:13,441 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-11-12 01:00:13,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 58 [2023-11-12 01:00:13,916 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-12 01:00:13,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 14 treesize of output 1 [2023-11-12 01:00:13,992 INFO L322 Elim1Store]: treesize reduction 73, result has 7.6 percent of original size [2023-11-12 01:00:13,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 109 [2023-11-12 01:00:14,461 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24)) (.cse6 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse24 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse10 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 8))) (and (forall ((v_ArrVal_177 Int) (v_prenex_2 (Array Int Int))) (or (= v_ArrVal_177 0) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)) (not (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_177)) v_ArrVal_177 v_prenex_2))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_177))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (forall ((v_arrayElimArr_6 (Array Int Int)) (v_DerPreprocessor_22 Int) (v_ArrVal_175 Int) (v_subst_4 Int) (v_subst_2 Int) (v_DerPreprocessor_42 Int) (v_subst_1 Int) (v_DerPreprocessor_21 Int) (v_DerPreprocessor_41 Int)) (let ((.cse4 (store (store (store v_arrayElimArr_6 v_subst_2 (select (store (store v_arrayElimArr_6 v_subst_2 v_DerPreprocessor_41) v_subst_1 v_DerPreprocessor_42) v_subst_2)) v_subst_1 v_DerPreprocessor_21) v_subst_4 v_DerPreprocessor_22))) (or (not (= (store (store v_arrayElimArr_6 v_subst_2 (select .cse4 v_subst_2)) v_subst_4 v_DerPreprocessor_22) .cse4)) (not (= v_DerPreprocessor_21 (select .cse4 v_subst_1))) (not (= (select (select (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_175)) v_ArrVal_177 v_arrayElimArr_6))) (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_2))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (= v_subst_2 v_subst_1)))))) (forall ((v_ArrVal_177 Int) (v_prenex_2 (Array Int Int))) (or (= v_ArrVal_177 0) (forall ((v_arrayElimArr_6 (Array Int Int)) (v_DerPreprocessor_22 Int) (v_ArrVal_175 Int) (v_subst_4 Int) (v_subst_1 Int) (v_DerPreprocessor_21 Int)) (or (not (= (select (select (let ((.cse7 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_175)) v_ArrVal_177 v_arrayElimArr_6))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_1))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (not (= v_DerPreprocessor_21 (select (store (store v_arrayElimArr_6 v_subst_1 v_DerPreprocessor_21) v_subst_4 v_DerPreprocessor_22) v_subst_1))))) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)) (not (= (select (select (let ((.cse8 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_177)) v_ArrVal_177 v_prenex_2))) (store .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse8 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_177))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_177 Int)) (or (forall ((v_arrayElimArr_5 (Array Int Int)) (v_ArrVal_175 Int) (v_subst_4 Int)) (or (= (select (select (let ((.cse9 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_175)) v_ArrVal_177 v_arrayElimArr_5))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_4))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse10) 0) (forall ((v_DerPreprocessor_48 Int) (v_DerPreprocessor_49 Int) (v_subst_1 Int)) (not (= v_DerPreprocessor_48 (select (store (store v_arrayElimArr_5 v_subst_4 v_DerPreprocessor_48) v_subst_1 v_DerPreprocessor_49) v_subst_4)))))) (= v_ArrVal_177 0) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)))) (forall ((v_ArrVal_177 Int) (v_prenex_2 (Array Int Int))) (or (forall ((v_arrayElimArr_6 (Array Int Int)) (v_DerPreprocessor_33 Int) (v_DerPreprocessor_34 Int) (v_ArrVal_175 Int) (v_subst_3 Int) (v_subst_2 Int) (v_DerPreprocessor_31 Int) (v_subst_1 Int) (v_DerPreprocessor_32 Int)) (let ((.cse11 (store v_arrayElimArr_6 v_subst_2 v_DerPreprocessor_33))) (or (not (= v_DerPreprocessor_33 (select (store .cse11 v_subst_3 v_DerPreprocessor_34) v_subst_2))) (not (= (select (select (let ((.cse12 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_175)) v_ArrVal_177 v_arrayElimArr_6))) (store .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse12 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_2))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (not (let ((.cse13 (store (store .cse11 v_subst_3 v_DerPreprocessor_31) v_subst_1 v_DerPreprocessor_32))) (= (store (store v_arrayElimArr_6 v_subst_2 (select .cse13 v_subst_2)) v_subst_1 v_DerPreprocessor_32) .cse13))) (= v_subst_3 v_subst_1)))) (= v_ArrVal_177 0) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)) (not (= (select (select (let ((.cse14 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_177)) v_ArrVal_177 v_prenex_2))) (store .cse14 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse14 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_177))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_177 Int)) (or (forall ((v_arrayElimArr_5 (Array Int Int)) (v_ArrVal_175 Int) (v_subst_4 Int)) (or (forall ((v_DerPreprocessor_46 Int) (v_DerPreprocessor_47 Int) (v_subst_3 Int) (v_subst_1 Int)) (let ((.cse15 (store (store v_arrayElimArr_5 v_subst_4 v_DerPreprocessor_46) v_subst_1 v_DerPreprocessor_47))) (or (not (= v_DerPreprocessor_47 (select .cse15 v_subst_3))) (not (= (select .cse15 v_subst_4) v_DerPreprocessor_46))))) (= (select (select (let ((.cse16 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_175)) v_ArrVal_177 v_arrayElimArr_5))) (store .cse16 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse16 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_4))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse10) 0))) (= v_ArrVal_177 0) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)))) (forall ((v_ArrVal_177 Int)) (or (forall ((v_prenex_5 (Array Int Int))) (not (= (select (select (let ((.cse17 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_177)) v_ArrVal_177 v_prenex_5))) (store .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse17 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_177))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_177 0) (forall ((v_arrayElimArr_8 (Array Int Int)) (v_DerPreprocessor_29 Int) (v_ArrVal_175 Int) (v_subst_3 Int) (v_subst_1 Int) (v_DerPreprocessor_30 Int)) (or (not (= (select (store (store v_arrayElimArr_8 v_subst_3 v_DerPreprocessor_29) v_subst_1 v_DerPreprocessor_30) v_subst_3) v_DerPreprocessor_29)) (not (= (select (select (let ((.cse18 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_175)) v_ArrVal_177 v_arrayElimArr_8))) (store .cse18 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse18 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_3))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0)))) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0))) (forall ((v_ArrVal_177 Int) (v_prenex_2 (Array Int Int))) (or (= v_ArrVal_177 0) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)) (forall ((v_arrayElimArr_6 (Array Int Int)) (v_DerPreprocessor_35 Int) (v_DerPreprocessor_36 Int) (v_ArrVal_175 Int) (v_DerPreprocessor_37 Int) (v_DerPreprocessor_38 Int) (v_subst_3 Int) (v_subst_2 Int) (v_subst_1 Int)) (let ((.cse21 (store v_arrayElimArr_6 v_subst_2 v_DerPreprocessor_37))) (let ((.cse19 (store (store .cse21 v_subst_3 v_DerPreprocessor_35) v_subst_1 v_DerPreprocessor_36))) (or (not (= v_DerPreprocessor_35 (select .cse19 v_subst_3))) (not (= .cse19 (store (store v_arrayElimArr_6 v_subst_2 (select .cse19 v_subst_2)) v_subst_1 v_DerPreprocessor_36))) (not (= (select (select (let ((.cse20 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_175)) v_ArrVal_177 v_arrayElimArr_6))) (store .cse20 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse20 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_2))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (not (= (select (store .cse21 v_subst_3 v_DerPreprocessor_38) v_subst_2) v_DerPreprocessor_37)))))) (not (= (select (select (let ((.cse22 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_177)) v_ArrVal_177 v_prenex_2))) (store .cse22 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse22 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_177))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_177 Int)) (or (forall ((v_arrayElimArr_7 (Array Int Int)) (v_ArrVal_175 Int) (v_subst_1 Int)) (= (select (select (let ((.cse23 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse6 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_175)) v_ArrVal_177 v_arrayElimArr_7))) (store .cse23 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse23 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_1))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse24) 0)) (= v_ArrVal_177 0) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)))) (forall ((v_ArrVal_177 Int)) (or (= v_ArrVal_177 0) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)) (forall ((v_prenex_1 (Array Int Int))) (= (select (select (let ((.cse25 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_177)) v_ArrVal_177 v_prenex_1))) (store .cse25 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse25 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_177))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse24) 0)))) (forall ((v_ArrVal_177 Int)) (or (= v_ArrVal_177 0) (forall ((v_ArrVal_186 (Array Int Int))) (= 0 (select (select (let ((.cse26 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_177)) v_ArrVal_177 v_ArrVal_186))) (store .cse26 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse26 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_177))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse10))) (< |c_#StackHeapBarrier| (+ v_ArrVal_177 1)))))) is different from false [2023-11-12 01:00:15,195 INFO L322 Elim1Store]: treesize reduction 90, result has 44.8 percent of original size [2023-11-12 01:00:15,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 151 [2023-11-12 01:00:15,251 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:15,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 183 treesize of output 181 [2023-11-12 01:00:15,271 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:15,543 INFO L322 Elim1Store]: treesize reduction 243, result has 19.0 percent of original size [2023-11-12 01:00:15,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 194 treesize of output 260 [2023-11-12 01:00:15,799 INFO L322 Elim1Store]: treesize reduction 90, result has 44.8 percent of original size [2023-11-12 01:00:15,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 250 treesize of output 239 [2023-11-12 01:00:15,897 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:15,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 391 treesize of output 349 [2023-11-12 01:00:15,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 144 [2023-11-12 01:00:16,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-12 01:00:16,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-12 01:00:16,948 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:16,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 158 [2023-11-12 01:00:17,094 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:17,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 202 [2023-11-12 01:00:17,146 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:17,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 66 treesize of output 76 [2023-11-12 01:00:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:00:17,232 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:17,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 46 [2023-11-12 01:00:17,244 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2023-11-12 01:00:17,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,253 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,263 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:17,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 49 [2023-11-12 01:00:17,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 01:00:17,304 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:00:17,311 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,312 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,317 INFO L322 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-12 01:00:17,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2023-11-12 01:00:17,324 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,325 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,329 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 01:00:17,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,340 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 01:00:17,345 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:00:17,351 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,352 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,356 INFO L322 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-12 01:00:17,356 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2023-11-12 01:00:17,366 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:00:17,372 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,373 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,384 INFO L322 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-12 01:00:17,384 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2023-11-12 01:00:17,390 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,391 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,396 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 01:00:17,403 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,410 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 01:00:17,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:00:17,420 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,421 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:17,425 INFO L322 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-11-12 01:00:17,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2023-11-12 01:00:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2023-11-12 01:00:17,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420363589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:17,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [476099425] [2023-11-12 01:00:17,619 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-12 01:00:17,619 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:17,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:17,629 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:17,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:21,451 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2023-11-12 01:00:21,578 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2023-11-12 01:00:21,579 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-11-12 01:00:21,599 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:25,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [476099425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:25,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:25,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 18, 9] total 38 [2023-11-12 01:00:25,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128627993] [2023-11-12 01:00:25,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:25,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:00:25,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:25,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:00:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1150, Unknown=56, NotChecked=70, Total=1406 [2023-11-12 01:00:25,533 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 01:00:28,422 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] [2023-11-12 01:00:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:29,771 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2023-11-12 01:00:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 01:00:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2023-11-12 01:00:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:29,775 INFO L225 Difference]: With dead ends: 141 [2023-11-12 01:00:29,776 INFO L226 Difference]: Without dead ends: 103 [2023-11-12 01:00:29,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=157, Invalid=1431, Unknown=56, NotChecked=78, Total=1722 [2023-11-12 01:00:29,778 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:29,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 251 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 2 Unknown, 0 Unchecked, 3.3s Time] [2023-11-12 01:00:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-12 01:00:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2023-11-12 01:00:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 64 states have internal predecessors, (83), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-12 01:00:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2023-11-12 01:00:29,820 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 38 [2023-11-12 01:00:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:29,821 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2023-11-12 01:00:29,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 01:00:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2023-11-12 01:00:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 01:00:29,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:29,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2023-11-12 01:00:29,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 01:00:30,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 01:00:30,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:30,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:30,031 INFO L85 PathProgramCache]: Analyzing trace with hash 537137871, now seen corresponding path program 1 times [2023-11-12 01:00:30,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:30,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517146344] [2023-11-12 01:00:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:30,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 01:00:30,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517146344] [2023-11-12 01:00:30,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517146344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662272112] [2023-11-12 01:00:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:30,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:30,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:30,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:30,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:00:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:30,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:00:30,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:00:30,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:30,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662272112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:30,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:30,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-12 01:00:30,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846446936] [2023-11-12 01:00:30,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:30,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:00:30,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:00:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:00:30,538 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:00:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:30,710 INFO L93 Difference]: Finished difference Result 179 states and 235 transitions. [2023-11-12 01:00:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:00:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2023-11-12 01:00:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:30,718 INFO L225 Difference]: With dead ends: 179 [2023-11-12 01:00:30,721 INFO L226 Difference]: Without dead ends: 107 [2023-11-12 01:00:30,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:00:30,723 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:30,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 147 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-12 01:00:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-12 01:00:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 70 states have internal predecessors, (85), 26 states have call successors, (26), 12 states have call predecessors, (26), 14 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2023-11-12 01:00:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2023-11-12 01:00:30,766 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 40 [2023-11-12 01:00:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:30,766 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2023-11-12 01:00:30,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:00:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2023-11-12 01:00:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-12 01:00:30,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:30,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1] [2023-11-12 01:00:30,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:30,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:30,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:30,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1649408245, now seen corresponding path program 1 times [2023-11-12 01:00:30,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:30,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358092917] [2023-11-12 01:00:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:30,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 01:00:31,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:31,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358092917] [2023-11-12 01:00:31,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358092917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:31,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802241428] [2023-11-12 01:00:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:31,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:31,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:31,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:00:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:31,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:00:31,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:00:31,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:31,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802241428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:31,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:31,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-12 01:00:31,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670854144] [2023-11-12 01:00:31,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:31,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:00:31,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:00:31,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:00:31,561 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:00:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:31,811 INFO L93 Difference]: Finished difference Result 219 states and 293 transitions. [2023-11-12 01:00:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:00:31,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-11-12 01:00:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:31,814 INFO L225 Difference]: With dead ends: 219 [2023-11-12 01:00:31,814 INFO L226 Difference]: Without dead ends: 139 [2023-11-12 01:00:31,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-12 01:00:31,816 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 52 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:31,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 170 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-12 01:00:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2023-11-12 01:00:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 76 states have internal predecessors, (93), 26 states have call successors, (26), 12 states have call predecessors, (26), 14 states have return successors, (28), 24 states have call predecessors, (28), 24 states have call successors, (28) [2023-11-12 01:00:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2023-11-12 01:00:31,872 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 42 [2023-11-12 01:00:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:31,872 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2023-11-12 01:00:31,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:00:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2023-11-12 01:00:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 01:00:31,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:31,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2023-11-12 01:00:31,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:32,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d75e79-1ada-49c7-92da-2bbd7b81c564/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:32,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:32,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1709149374, now seen corresponding path program 1 times [2023-11-12 01:00:32,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:32,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681509132] [2023-11-12 01:00:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:32,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat