./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:16:18,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:16:18,840 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-06 22:16:18,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:16:18,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:16:18,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:16:18,879 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:16:18,880 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:16:18,881 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:16:18,881 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:16:18,882 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:16:18,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:16:18,883 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:16:18,884 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:16:18,884 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:16:18,885 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:16:18,886 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:16:18,886 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:16:18,887 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:16:18,887 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:16:18,888 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:16:18,889 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:16:18,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:16:18,890 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:16:18,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:16:18,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:18,891 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:16:18,892 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:16:18,892 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:16:18,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:16:18,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:16:18,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:16:18,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:16:18,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:16:18,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:16:18,895 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:16:18,896 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e [2023-11-06 22:16:19,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:16:19,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:16:19,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:16:19,277 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:16:19,278 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:16:19,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2023-11-06 22:16:22,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:16:22,866 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:16:22,867 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2023-11-06 22:16:22,910 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/data/4e855afb3/1a360a04956249ad98494ccd233bda81/FLAG7a588e04b [2023-11-06 22:16:22,929 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/data/4e855afb3/1a360a04956249ad98494ccd233bda81 [2023-11-06 22:16:22,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:16:22,940 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:16:22,942 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:22,943 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:16:22,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:16:22,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:22" (1/1) ... [2023-11-06 22:16:22,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522dbed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:22, skipping insertion in model container [2023-11-06 22:16:22,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:22" (1/1) ... [2023-11-06 22:16:23,110 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:16:23,462 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_242ffd0a-578d-4c15-a639-65cdbbceee58/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2023-11-06 22:16:23,470 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_242ffd0a-578d-4c15-a639-65cdbbceee58/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2023-11-06 22:16:24,529 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,530 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,531 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,532 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,534 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,561 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,562 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,571 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,574 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,580 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,588 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,589 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:24,600 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,110 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-06 22:16:25,115 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-06 22:16:25,116 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-06 22:16:25,121 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-06 22:16:25,122 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-06 22:16:25,124 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-06 22:16:25,126 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-06 22:16:25,127 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-06 22:16:25,128 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-06 22:16:25,129 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-06 22:16:25,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:25,502 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:16:25,517 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_242ffd0a-578d-4c15-a639-65cdbbceee58/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2023-11-06 22:16:25,518 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_242ffd0a-578d-4c15-a639-65cdbbceee58/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2023-11-06 22:16:25,563 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,563 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,564 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,565 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,566 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,577 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,578 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,579 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,580 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,581 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,582 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,583 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,583 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:16:25,622 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-06 22:16:25,623 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-06 22:16:25,624 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-06 22:16:25,625 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-06 22:16:25,626 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-06 22:16:25,627 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-06 22:16:25,628 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-06 22:16:25,628 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-06 22:16:25,629 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-06 22:16:25,630 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-06 22:16:25,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:25,885 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,886 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,886 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,886 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,886 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,887 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,887 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,887 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,888 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,888 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,889 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,890 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,890 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,891 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,891 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:16:25,899 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:16:25,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25 WrapperNode [2023-11-06 22:16:25,900 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:25,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:25,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:16:25,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:16:25,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,005 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,053 INFO L138 Inliner]: procedures = 678, calls = 1039, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 56 [2023-11-06 22:16:26,054 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:26,054 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:16:26,055 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:16:26,055 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:16:26,065 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,070 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,084 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,091 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,093 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:16:26,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:16:26,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:16:26,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:16:26,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (1/1) ... [2023-11-06 22:16:26,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:26,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:26,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:16:26,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:16:26,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:16:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:16:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:16:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-06 22:16:26,203 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-06 22:16:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:16:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:16:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:16:26,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:16:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:16:26,205 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:16:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:16:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:16:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 22:16:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2023-11-06 22:16:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2023-11-06 22:16:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:16:26,522 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:16:26,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:16:26,705 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:16:26,711 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:16:26,712 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:16:26,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:26 BoogieIcfgContainer [2023-11-06 22:16:26,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:16:26,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:16:26,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:16:26,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:16:26,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:16:22" (1/3) ... [2023-11-06 22:16:26,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209b9e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:26, skipping insertion in model container [2023-11-06 22:16:26,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:25" (2/3) ... [2023-11-06 22:16:26,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209b9e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:26, skipping insertion in model container [2023-11-06 22:16:26,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:26" (3/3) ... [2023-11-06 22:16:26,723 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_next_harness.i [2023-11-06 22:16:26,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:16:26,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:16:26,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:16:26,805 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48565588, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:16:26,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:16:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 22:16:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:16:26,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:26,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:26,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:26,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash 829036907, now seen corresponding path program 1 times [2023-11-06 22:16:26,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:26,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836702683] [2023-11-06 22:16:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:26,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:27,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:27,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:27,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:16:27,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:27,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836702683] [2023-11-06 22:16:27,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836702683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:27,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:27,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:16:27,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399192816] [2023-11-06 22:16:27,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:27,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:16:27,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:27,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:16:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:16:27,406 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:16:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:27,444 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2023-11-06 22:16:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:16:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-11-06 22:16:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:27,455 INFO L225 Difference]: With dead ends: 94 [2023-11-06 22:16:27,456 INFO L226 Difference]: Without dead ends: 45 [2023-11-06 22:16:27,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:16:27,467 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:27,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:16:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-06 22:16:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-06 22:16:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-06 22:16:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-11-06 22:16:27,515 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2023-11-06 22:16:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:27,516 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-06 22:16:27,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:16:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-11-06 22:16:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:16:27,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:27,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:27,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:16:27,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:27,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash -192031447, now seen corresponding path program 1 times [2023-11-06 22:16:27,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:27,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126922197] [2023-11-06 22:16:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:27,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:29,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:29,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:29,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126922197] [2023-11-06 22:16:29,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126922197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:29,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:29,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:16:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899674723] [2023-11-06 22:16:29,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:29,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:16:29,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:16:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:16:29,600 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:16:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:29,978 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-11-06 22:16:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:16:29,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-06 22:16:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:29,985 INFO L225 Difference]: With dead ends: 56 [2023-11-06 22:16:29,986 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 22:16:29,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:16:29,988 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:29,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 290 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:16:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 22:16:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-11-06 22:16:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2023-11-06 22:16:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2023-11-06 22:16:30,019 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 28 [2023-11-06 22:16:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:30,020 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2023-11-06 22:16:30,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:16:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2023-11-06 22:16:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:16:30,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:30,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:30,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:16:30,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:30,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1001378073, now seen corresponding path program 1 times [2023-11-06 22:16:30,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:30,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887435697] [2023-11-06 22:16:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:30,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:30,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:30,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:16:30,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:30,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887435697] [2023-11-06 22:16:30,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887435697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:30,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061773234] [2023-11-06 22:16:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:30,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:30,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:30,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:30,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:16:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:31,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:16:31,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:31,163 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-06 22:16:31,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-06 22:16:31,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:31,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:16:31,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:16:31,190 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 10 treesize of output 8 [2023-11-06 22:16:31,613 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:16:31,614 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 15 treesize of output 7 [2023-11-06 22:16:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:32,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:32,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061773234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:32,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:32,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 12] total 31 [2023-11-06 22:16:32,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014313139] [2023-11-06 22:16:32,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:32,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:16:32,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:16:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:16:32,695 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-06 22:16:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:34,173 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2023-11-06 22:16:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:16:34,174 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) Word has length 28 [2023-11-06 22:16:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:34,176 INFO L225 Difference]: With dead ends: 118 [2023-11-06 22:16:34,176 INFO L226 Difference]: Without dead ends: 68 [2023-11-06 22:16:34,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:16:34,180 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 132 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:34,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 395 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:16:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-06 22:16:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2023-11-06 22:16:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2023-11-06 22:16:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2023-11-06 22:16:34,197 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 28 [2023-11-06 22:16:34,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:34,198 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2023-11-06 22:16:34,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-06 22:16:34,199 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2023-11-06 22:16:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:16:34,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:34,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:34,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:34,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:34,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:34,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1394405083, now seen corresponding path program 1 times [2023-11-06 22:16:34,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:34,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104900763] [2023-11-06 22:16:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:34,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:34,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:34,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:34,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:34,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104900763] [2023-11-06 22:16:34,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104900763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:34,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:34,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:16:34,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296820280] [2023-11-06 22:16:34,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:34,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:16:34,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:16:34,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:34,658 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:16:34,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:34,707 INFO L93 Difference]: Finished difference Result 128 states and 156 transitions. [2023-11-06 22:16:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:34,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-06 22:16:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:34,712 INFO L225 Difference]: With dead ends: 128 [2023-11-06 22:16:34,712 INFO L226 Difference]: Without dead ends: 64 [2023-11-06 22:16:34,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:34,718 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:34,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:16:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-06 22:16:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2023-11-06 22:16:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-06 22:16:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2023-11-06 22:16:34,744 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 28 [2023-11-06 22:16:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:34,745 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2023-11-06 22:16:34,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:16:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2023-11-06 22:16:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 22:16:34,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:34,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:34,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:16:34,749 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:34,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:34,749 INFO L85 PathProgramCache]: Analyzing trace with hash 854159971, now seen corresponding path program 1 times [2023-11-06 22:16:34,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:34,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822947668] [2023-11-06 22:16:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:34,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:36,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:36,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:36,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:16:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:36,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:16:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:37,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:37,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822947668] [2023-11-06 22:16:37,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822947668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:37,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831629298] [2023-11-06 22:16:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:37,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:37,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:37,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:16:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:37,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-06 22:16:37,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:37,357 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 18 treesize of output 12 [2023-11-06 22:16:37,368 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 43 treesize of output 11 [2023-11-06 22:16:37,375 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 35 treesize of output 19 [2023-11-06 22:16:39,865 INFO L322 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2023-11-06 22:16:39,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 89 [2023-11-06 22:16:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:39,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:41,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831629298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:41,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 16] total 47 [2023-11-06 22:16:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036368212] [2023-11-06 22:16:41,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:41,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 22:16:41,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:41,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 22:16:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2001, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:16:41,628 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 47 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 13 states have call successors, (17), 4 states have call predecessors, (17), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-06 22:16:44,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:44,231 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-11-06 22:16:44,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:16:44,232 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 13 states have call successors, (17), 4 states have call predecessors, (17), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) Word has length 42 [2023-11-06 22:16:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:44,234 INFO L225 Difference]: With dead ends: 73 [2023-11-06 22:16:44,234 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 22:16:44,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=313, Invalid=3469, Unknown=0, NotChecked=0, Total=3782 [2023-11-06 22:16:44,237 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 110 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:44,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 687 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:16:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 22:16:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2023-11-06 22:16:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2023-11-06 22:16:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-11-06 22:16:44,273 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 42 [2023-11-06 22:16:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:44,276 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-11-06 22:16:44,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 13 states have call successors, (17), 4 states have call predecessors, (17), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-06 22:16:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-11-06 22:16:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 22:16:44,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:44,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:44,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:44,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:44,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:44,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:44,485 INFO L85 PathProgramCache]: Analyzing trace with hash 44813345, now seen corresponding path program 1 times [2023-11-06 22:16:44,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:44,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446766120] [2023-11-06 22:16:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:44,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:16:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:16:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:16:45,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:45,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446766120] [2023-11-06 22:16:45,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446766120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:45,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:45,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:16:45,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198070048] [2023-11-06 22:16:45,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:45,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:16:45,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:45,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:16:45,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:45,324 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:16:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:45,532 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2023-11-06 22:16:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:16:45,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-11-06 22:16:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:45,534 INFO L225 Difference]: With dead ends: 112 [2023-11-06 22:16:45,534 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 22:16:45,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:16:45,536 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 19 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:45,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 204 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:16:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 22:16:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2023-11-06 22:16:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2023-11-06 22:16:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2023-11-06 22:16:45,551 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 42 [2023-11-06 22:16:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:45,551 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2023-11-06 22:16:45,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:16:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2023-11-06 22:16:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 22:16:45,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:45,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:45,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:16:45,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:45,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash -348213665, now seen corresponding path program 1 times [2023-11-06 22:16:45,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:45,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458217497] [2023-11-06 22:16:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:45,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:45,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:46,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:46,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:16:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:16:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:46,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458217497] [2023-11-06 22:16:46,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458217497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121885776] [2023-11-06 22:16:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:46,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:46,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:46,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:16:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:46,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 22:16:46,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:46,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-06 22:16:46,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-06 22:16:46,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:16:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:16:46,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:16:46,332 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 10 treesize of output 8 [2023-11-06 22:16:46,795 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 16 treesize of output 8 [2023-11-06 22:16:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:16:46,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:46,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121885776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:46,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:16:46,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2023-11-06 22:16:46,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871684781] [2023-11-06 22:16:46,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:46,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:16:46,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:46,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:16:46,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:16:46,873 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-06 22:16:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:47,520 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2023-11-06 22:16:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:16:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2023-11-06 22:16:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:47,521 INFO L225 Difference]: With dead ends: 124 [2023-11-06 22:16:47,522 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 22:16:47,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:16:47,523 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 53 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:47,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 262 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:16:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 22:16:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2023-11-06 22:16:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-06 22:16:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-11-06 22:16:47,538 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 42 [2023-11-06 22:16:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:47,538 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-11-06 22:16:47,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-06 22:16:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-11-06 22:16:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 22:16:47,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:47,540 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:47,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:47,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:16:47,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:47,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash -541770688, now seen corresponding path program 1 times [2023-11-06 22:16:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:47,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408927101] [2023-11-06 22:16:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:47,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:47,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:47,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:47,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:48,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:16:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:48,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:16:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:48,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-06 22:16:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:16:48,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:48,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408927101] [2023-11-06 22:16:48,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408927101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:48,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:48,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:16:48,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419505434] [2023-11-06 22:16:48,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:16:48,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:16:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:16:48,081 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:16:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:48,176 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2023-11-06 22:16:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:16:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2023-11-06 22:16:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:48,179 INFO L225 Difference]: With dead ends: 73 [2023-11-06 22:16:48,179 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 22:16:48,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:16:48,181 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:48,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 233 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:16:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 22:16:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-06 22:16:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 51 states have internal predecessors, (56), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-06 22:16:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-11-06 22:16:48,200 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 48 [2023-11-06 22:16:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:48,200 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-11-06 22:16:48,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:16:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-11-06 22:16:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 22:16:48,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:48,206 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:48,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:16:48,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:48,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:48,207 INFO L85 PathProgramCache]: Analyzing trace with hash -266250434, now seen corresponding path program 1 times [2023-11-06 22:16:48,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:48,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833826733] [2023-11-06 22:16:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:48,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:49,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:16:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:49,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:16:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:49,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:16:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:16:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:50,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:16:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:50,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-06 22:16:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-06 22:16:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:50,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-06 22:16:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:16:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833826733] [2023-11-06 22:16:50,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833826733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776972484] [2023-11-06 22:16:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:50,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:50,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:50,481 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:50,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:16:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:50,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-06 22:16:50,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:50,682 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 35 treesize of output 19 [2023-11-06 22:16:50,693 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 43 treesize of output 11 [2023-11-06 22:16:50,700 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 18 treesize of output 12 [2023-11-06 22:16:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:16:53,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:16:58,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776972484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:58,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:16:58,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 37 [2023-11-06 22:16:58,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465987894] [2023-11-06 22:16:58,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:58,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:16:58,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:58,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:16:58,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1188, Unknown=1, NotChecked=0, Total=1332 [2023-11-06 22:16:58,429 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 37 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 12 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2023-11-06 22:17:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:00,015 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-11-06 22:17:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:17:00,016 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 12 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 63 [2023-11-06 22:17:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:00,017 INFO L225 Difference]: With dead ends: 82 [2023-11-06 22:17:00,017 INFO L226 Difference]: Without dead ends: 80 [2023-11-06 22:17:00,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 108 SyntacticMatches, 13 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=261, Invalid=1994, Unknown=1, NotChecked=0, Total=2256 [2023-11-06 22:17:00,019 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 57 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:00,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 559 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:17:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-06 22:17:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2023-11-06 22:17:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 57 states have internal predecessors, (61), 13 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2023-11-06 22:17:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-11-06 22:17:00,060 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 63 [2023-11-06 22:17:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:00,060 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-11-06 22:17:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 12 states have call successors, (26), 4 states have call predecessors, (26), 9 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2023-11-06 22:17:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-11-06 22:17:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 22:17:00,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:00,062 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-11-06 22:17:00,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:00,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:17:00,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:00,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:00,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1075597060, now seen corresponding path program 1 times [2023-11-06 22:17:00,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:00,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41708802] [2023-11-06 22:17:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:00,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:17:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:17:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:17:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:17:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:17:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-06 22:17:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-06 22:17:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-06 22:17:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:17:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41708802] [2023-11-06 22:17:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41708802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887522428] [2023-11-06 22:17:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:01,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:01,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:01,133 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:01,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:17:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:01,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:17:01,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:01,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-06 22:17:01,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-06 22:17:01,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:17:01,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:17:01,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:17:01,361 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 10 treesize of output 8 [2023-11-06 22:17:01,867 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:17:01,867 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 15 treesize of output 7 [2023-11-06 22:17:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:17:02,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:17:03,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887522428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:03,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:17:03,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 32 [2023-11-06 22:17:03,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674072108] [2023-11-06 22:17:03,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:03,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:17:03,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:17:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:17:03,224 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 32 states, 31 states have (on average 2.935483870967742) internal successors, (91), 32 states have internal predecessors, (91), 7 states have call successors, (25), 4 states have call predecessors, (25), 8 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-11-06 22:17:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:04,023 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2023-11-06 22:17:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:17:04,024 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.935483870967742) internal successors, (91), 32 states have internal predecessors, (91), 7 states have call successors, (25), 4 states have call predecessors, (25), 8 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 63 [2023-11-06 22:17:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:04,025 INFO L225 Difference]: With dead ends: 106 [2023-11-06 22:17:04,025 INFO L226 Difference]: Without dead ends: 79 [2023-11-06 22:17:04,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 109 SyntacticMatches, 13 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:17:04,027 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:04,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 364 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:17:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-06 22:17:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-11-06 22:17:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 13 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2023-11-06 22:17:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-06 22:17:04,047 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 63 [2023-11-06 22:17:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:04,047 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-06 22:17:04,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.935483870967742) internal successors, (91), 32 states have internal predecessors, (91), 7 states have call successors, (25), 4 states have call predecessors, (25), 8 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2023-11-06 22:17:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-06 22:17:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 22:17:04,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:04,049 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:04,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:17:04,256 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:04,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1468624070, now seen corresponding path program 1 times [2023-11-06 22:17:04,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:04,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393175954] [2023-11-06 22:17:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:04,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:17:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:17:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:17:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:17:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:17:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-06 22:17:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-06 22:17:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-06 22:17:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:17:04,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393175954] [2023-11-06 22:17:04,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393175954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:04,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:04,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:17:04,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326938978] [2023-11-06 22:17:04,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:17:04,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:17:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:17:04,489 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-06 22:17:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:04,520 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2023-11-06 22:17:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:17:04,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 63 [2023-11-06 22:17:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:04,523 INFO L225 Difference]: With dead ends: 105 [2023-11-06 22:17:04,523 INFO L226 Difference]: Without dead ends: 68 [2023-11-06 22:17:04,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:17:04,525 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:04,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:17:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-06 22:17:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2023-11-06 22:17:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-06 22:17:04,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2023-11-06 22:17:04,542 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 63 [2023-11-06 22:17:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:04,543 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2023-11-06 22:17:04,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-06 22:17:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2023-11-06 22:17:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 22:17:04,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:04,544 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:04,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:17:04,545 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:04,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash 763050350, now seen corresponding path program 1 times [2023-11-06 22:17:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:04,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378816694] [2023-11-06 22:17:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:17:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 22:17:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:17:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:17:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:17:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-06 22:17:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-06 22:17:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-06 22:17:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 22:17:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-06 22:17:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 22:17:06,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:06,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378816694] [2023-11-06 22:17:06,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378816694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138347395] [2023-11-06 22:17:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:06,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:06,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:06,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:06,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242ffd0a-578d-4c15-a639-65cdbbceee58/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:17:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:07,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-06 22:17:07,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:10,036 WARN L861 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_linked_list_next_~node#1.offset| Int) (|ULTIMATE.start_aws_linked_list_next_~node#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|)) (.cse4 (+ .cse0 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (.cse2 (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4))) (and (= .cse0 (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (= .cse3 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))))))) is different from true [2023-11-06 22:17:14,571 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_aws_linked_list_next_~node#1.offset| Int) (|ULTIMATE.start_aws_linked_list_next_~node#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|)) (.cse4 (+ .cse0 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (.cse2 (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4))) (and (= .cse0 (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (= .cse3 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))))))) (not (= (mod |c___VERIFIER_assert_#in~cond| 256) 0))) is different from true [2023-11-06 22:18:45,013 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_aws_linked_list_next_~node#1.offset| Int) (|ULTIMATE.start_aws_linked_list_next_~node#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|)) (.cse4 (+ .cse0 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (.cse2 (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4))) (and (= .cse0 (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (= .cse3 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|)) (.cse9 (+ .cse8 8))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| .cse7) .cse9)) (.cse6 (select (select |c_#memory_$Pointer$.offset| .cse7) .cse9))) (and (= (select (select |c_#memory_$Pointer$.base| .cse5) .cse6) .cse7) (= .cse8 (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6)))))))) is different from true [2023-11-06 22:18:47,417 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_aws_linked_list_next_~node#1.offset| Int) (|ULTIMATE.start_aws_linked_list_next_~node#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|)) (.cse4 (+ .cse0 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (.cse2 (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4))) (and (= .cse0 (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (= .cse3 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|)) (.cse9 (+ .cse8 8))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| .cse7) .cse9)) (.cse6 (select (select |c_#memory_$Pointer$.offset| .cse7) .cse9))) (and (= (select (select |c_#memory_$Pointer$.base| .cse5) .cse6) .cse7) (= |c_ULTIMATE.start_aws_linked_list_next_harness_~rval~10#1.offset| .cse8) (= |c_ULTIMATE.start_aws_linked_list_next_harness_~rval~10#1.base| .cse7) (= .cse8 (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27| Int)) (let ((.cse13 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|))) (let ((.cse12 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|)) (.cse14 (+ .cse13 8))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| .cse12) .cse14)) (.cse11 (select (select |c_#memory_$Pointer$.offset| .cse12) .cse14))) (and (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) .cse12) (= .cse13 (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11)))))))) is different from true [2023-11-06 22:18:49,661 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_aws_linked_list_next_~node#1.offset| Int) (|ULTIMATE.start_aws_linked_list_next_~node#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|)) (.cse4 (+ .cse0 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (.cse2 (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4))) (and (= .cse0 (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (= .cse3 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|)) (.cse9 (+ .cse8 8))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| .cse7) .cse9)) (.cse6 (select (select |c_#memory_$Pointer$.offset| .cse7) .cse9))) (and (= (select (select |c_#memory_$Pointer$.base| .cse5) .cse6) .cse7) (= .cse8 (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28|))) (let ((.cse13 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28|)) (.cse14 (+ .cse10 8))) (let ((.cse11 (select (select |c_#memory_$Pointer$.base| .cse13) .cse14)) (.cse12 (select (select |c_#memory_$Pointer$.offset| .cse13) .cse14))) (and (= .cse10 (select (select |c_#memory_$Pointer$.offset| .cse11) .cse12)) (= (select (select |c_#memory_$Pointer$.base| .cse11) .cse12) .cse13))))))) is different from true [2023-11-06 22:18:52,091 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_aws_linked_list_next_~node#1.offset| Int) (|ULTIMATE.start_aws_linked_list_next_~node#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|)) (.cse4 (+ .cse0 8))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (.cse2 (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4))) (and (= .cse0 (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (= .cse3 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|)) (.cse9 (+ .cse8 8))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| .cse7) .cse9)) (.cse6 (select (select |c_#memory_$Pointer$.offset| .cse7) .cse9))) (and (= (select (select |c_#memory_$Pointer$.base| .cse5) .cse6) .cse7) (= |c_ULTIMATE.start_aws_linked_list_next_harness_~rval~10#1.offset| .cse8) (= |c_ULTIMATE.start_aws_linked_list_next_harness_~rval~10#1.base| .cse7) (= .cse8 (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27| Int)) (let ((.cse13 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|))) (let ((.cse12 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|)) (.cse14 (+ .cse13 8))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| .cse12) .cse14)) (.cse11 (select (select |c_#memory_$Pointer$.offset| .cse12) .cse14))) (and (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) .cse12) (= .cse13 (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28| Int)) (let ((.cse15 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28|))) (let ((.cse18 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28|)) (.cse19 (+ .cse15 8))) (let ((.cse16 (select (select |c_#memory_$Pointer$.base| .cse18) .cse19)) (.cse17 (select (select |c_#memory_$Pointer$.offset| .cse18) .cse19))) (and (= .cse15 (select (select |c_#memory_$Pointer$.offset| .cse16) .cse17)) (= (select (select |c_#memory_$Pointer$.base| .cse16) .cse17) .cse18))))))) is different from true [2023-11-06 22:18:54,410 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_27| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_29| Int)) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_27|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_29|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_27|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_29|)) (.cse4 (+ 8 .cse3))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse4)) (.cse2 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse4))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2)) (= (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2) .cse3)))))) (exists ((|ULTIMATE.start_aws_linked_list_next_~node#1.offset| Int) (|ULTIMATE.start_aws_linked_list_next_~node#1.base| Int)) (let ((.cse5 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|))) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|)) (.cse9 (+ .cse5 8))) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| .cse8) .cse9)) (.cse7 (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9))) (and (= .cse5 (select (select |c_#memory_$Pointer$.offset| .cse6) .cse7)) (= .cse8 (select (select |c_#memory_$Pointer$.base| .cse6) .cse7))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27| Int)) (let ((.cse13 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|))) (let ((.cse12 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_25|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_27|)) (.cse14 (+ .cse13 8))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| .cse12) .cse14)) (.cse11 (select (select |c_#memory_$Pointer$.offset| .cse12) .cse14))) (and (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) .cse12) (= .cse13 (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28| Int)) (let ((.cse15 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28|))) (let ((.cse18 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_26|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_28|)) (.cse19 (+ .cse15 8))) (let ((.cse16 (select (select |c_#memory_$Pointer$.base| .cse18) .cse19)) (.cse17 (select (select |c_#memory_$Pointer$.offset| .cse18) .cse19))) (and (= .cse15 (select (select |c_#memory_$Pointer$.offset| .cse16) .cse17)) (= (select (select |c_#memory_$Pointer$.base| .cse16) .cse17) .cse18))))))) is different from true [2023-11-06 22:19:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 12 not checked. [2023-11-06 22:19:06,981 INFO L327 TraceCheckSpWp]: Computing backward predicates...