./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 52a5b40e07f9d2025e21e89532c54ecb2612af1d6384644534b1ef79f7198c6a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:20:47,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:20:47,842 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:20:47,848 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:20:47,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:20:47,877 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:20:47,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:20:47,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:20:47,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:20:47,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:20:47,880 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:20:47,881 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:20:47,881 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:20:47,882 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:20:47,882 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:20:47,883 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:20:47,883 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:20:47,884 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:20:47,884 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:20:47,885 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:20:47,885 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:20:47,889 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:20:47,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:20:47,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:20:47,891 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:20:47,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:20:47,892 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:20:47,893 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:20:47,893 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:20:47,893 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:20:47,895 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:20:47,895 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:20:47,895 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:20:47,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:20:47,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:20:47,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:20:47,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:20:47,898 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:20:47,898 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:20:47,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:20:47,899 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:20:47,899 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:20:47,899 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:20:47,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:20:47,900 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a5b40e07f9d2025e21e89532c54ecb2612af1d6384644534b1ef79f7198c6a [2023-11-23 21:20:48,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:20:48,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:20:48,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:20:48,290 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:20:48,291 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:20:48,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_linked_list_push_front_harness.i [2023-11-23 21:20:51,433 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:20:52,051 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:20:52,052 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/sv-benchmarks/c/aws-c-common/aws_linked_list_push_front_harness.i [2023-11-23 21:20:52,093 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/data/952b46145/262e495c9ea04b3087b187e0a0de4f2b/FLAGac6a16def [2023-11-23 21:20:52,111 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/data/952b46145/262e495c9ea04b3087b187e0a0de4f2b [2023-11-23 21:20:52,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:20:52,121 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:20:52,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:20:52,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:20:52,131 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:20:52,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:20:52" (1/1) ... [2023-11-23 21:20:52,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a8c5aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:52, skipping insertion in model container [2023-11-23 21:20:52,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:20:52" (1/1) ... [2023-11-23 21:20:52,281 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:20:52,619 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_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/sv-benchmarks/c/aws-c-common/aws_linked_list_push_front_harness.i[4500,4513] [2023-11-23 21:20:52,628 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_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/sv-benchmarks/c/aws-c-common/aws_linked_list_push_front_harness.i[4560,4573] [2023-11-23 21:20:53,687 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,688 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,689 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,690 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,691 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,707 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,708 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,710 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,711 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,713 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,714 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,715 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:53,716 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,191 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:20:54,197 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:20:54,199 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:20:54,200 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:20:54,202 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:20:54,202 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:20:54,203 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:20:54,204 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:20:54,205 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:20:54,205 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:20:54,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:20:54,409 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:20:54,424 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_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/sv-benchmarks/c/aws-c-common/aws_linked_list_push_front_harness.i[4500,4513] [2023-11-23 21:20:54,425 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_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/sv-benchmarks/c/aws-c-common/aws_linked_list_push_front_harness.i[4560,4573] [2023-11-23 21:20:54,485 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,485 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,486 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,486 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,487 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,506 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,507 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,508 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,512 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,515 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,519 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,520 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:20:54,583 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:20:54,584 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:20:54,585 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:20:54,586 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:20:54,587 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:20:54,588 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:20:54,588 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:20:54,589 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:20:54,589 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:20:54,590 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:20:54,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:20:54,912 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,912 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,912 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,913 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,913 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,913 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,914 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,915 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,915 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,915 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,915 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,916 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,916 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,916 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,916 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,917 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:20:54,924 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:20:54,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54 WrapperNode [2023-11-23 21:20:54,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:20:54,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:20:54,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:20:54,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:20:54,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,101 INFO L138 Inliner]: procedures = 678, calls = 1048, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 151 [2023-11-23 21:20:55,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:20:55,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:20:55,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:20:55,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:20:55,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,128 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,144 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,148 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,156 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:20:55,164 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:20:55,164 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:20:55,164 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:20:55,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (1/1) ... [2023-11-23 21:20:55,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:20:55,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:55,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:20:55,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:20:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:20:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:20:55,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:20:55,246 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-23 21:20:55,246 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-23 21:20:55,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:20:55,246 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-11-23 21:20:55,246 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-11-23 21:20:55,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:20:55,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:20:55,246 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_insert_before [2023-11-23 21:20:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_insert_before [2023-11-23 21:20:55,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:20:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:20:55,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:20:55,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:20:55,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:20:55,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:20:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:20:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:20:55,248 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:20:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2023-11-23 21:20:55,248 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2023-11-23 21:20:55,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:20:55,519 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:20:55,522 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:20:55,915 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:20:56,052 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:20:56,053 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:20:56,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:20:56 BoogieIcfgContainer [2023-11-23 21:20:56,056 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:20:56,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:20:56,060 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:20:56,063 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:20:56,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:20:52" (1/3) ... [2023-11-23 21:20:56,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab0f027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:20:56, skipping insertion in model container [2023-11-23 21:20:56,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:54" (2/3) ... [2023-11-23 21:20:56,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab0f027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:20:56, skipping insertion in model container [2023-11-23 21:20:56,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:20:56" (3/3) ... [2023-11-23 21:20:56,071 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_push_front_harness.i [2023-11-23 21:20:56,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:20:56,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:20:56,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:20:56,163 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b9098ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:20:56,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:20:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-23 21:20:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:20:56,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:56,180 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-23 21:20:56,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:56,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:56,186 INFO L85 PathProgramCache]: Analyzing trace with hash -518986292, now seen corresponding path program 1 times [2023-11-23 21:20:56,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:56,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707230978] [2023-11-23 21:20:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:56,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:20:57,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707230978] [2023-11-23 21:20:57,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707230978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:57,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382520770] [2023-11-23 21:20:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:57,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:57,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:57,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:57,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:20:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:57,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-23 21:20:57,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:57,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-23 21:20:57,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-23 21:20:58,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-11-23 21:20:58,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2023-11-23 21:20:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:20:59,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:59,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382520770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:59,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:59,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2023-11-23 21:20:59,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444221496] [2023-11-23 21:20:59,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:59,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:20:59,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:20:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:20:59,929 INFO L87 Difference]: Start difference. First operand has 75 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:21:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:00,919 INFO L93 Difference]: Finished difference Result 173 states and 247 transitions. [2023-11-23 21:21:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:21:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2023-11-23 21:21:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:00,930 INFO L225 Difference]: With dead ends: 173 [2023-11-23 21:21:00,930 INFO L226 Difference]: Without dead ends: 103 [2023-11-23 21:21:00,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:21:00,938 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 29 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:00,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 502 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:21:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-23 21:21:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2023-11-23 21:21:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 56 states have internal predecessors, (66), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-23 21:21:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 137 transitions. [2023-11-23 21:21:01,018 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 137 transitions. Word has length 43 [2023-11-23 21:21:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:01,019 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 137 transitions. [2023-11-23 21:21:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:21:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 137 transitions. [2023-11-23 21:21:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:21:01,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:01,024 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1] [2023-11-23 21:21:01,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:21:01,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:21:01,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:01,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:01,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1167872648, now seen corresponding path program 1 times [2023-11-23 21:21:01,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:01,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748953699] [2023-11-23 21:21:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:01,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:21:01,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:01,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748953699] [2023-11-23 21:21:01,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748953699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:21:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928178814] [2023-11-23 21:21:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:01,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:21:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:21:01,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:21:01,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a5cbc-c5f5-4d5d-9770-e104d3f383f8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:21:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:21:02,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-23 21:21:02,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:21:02,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 21:21:02,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-23 21:21:02,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-23 21:21:02,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:21:03,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:03,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:03,406 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-23 21:21:03,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 207 [2023-11-23 21:21:03,429 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:21:03,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 222 treesize of output 198 [2023-11-23 21:21:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:03,467 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:03,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2023-11-23 21:21:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:03,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 51 [2023-11-23 21:21:03,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-23 21:21:03,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 21:21:03,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-23 21:21:03,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:21:03,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2023-11-23 21:21:03,580 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:21:03,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 314 treesize of output 282 [2023-11-23 21:21:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:21:04,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:21:08,367 INFO L349 Elim1Store]: treesize reduction 904, result has 31.4 percent of original size [2023-11-23 21:21:08,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 668 treesize of output 1086 [2023-11-23 21:21:08,629 INFO L349 Elim1Store]: treesize reduction 709, result has 6.8 percent of original size [2023-11-23 21:21:08,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 14 case distinctions, treesize of input 1913 treesize of output 1826 [2023-11-23 21:21:08,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 320 [2023-11-23 21:21:11,991 INFO L349 Elim1Store]: treesize reduction 40, result has 50.6 percent of original size [2023-11-23 21:21:11,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 10008 treesize of output 9962 [2023-11-23 21:21:12,967 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:13,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:21:13,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 298 treesize of output 296 [2023-11-23 21:21:13,494 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-23 21:21:13,521 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:13,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2023-11-23 21:21:13,695 INFO L349 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2023-11-23 21:21:13,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 422 treesize of output 432 [2023-11-23 21:21:14,322 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:14,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:14,341 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 21:21:14,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2023-11-23 21:21:14,455 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:14,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:21:14,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:21:14,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2023-11-23 21:21:14,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-23 21:21:14,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-23 21:21:14,722 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:14,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:21:14,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 216 treesize of output 208 [2023-11-23 21:21:15,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,190 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,215 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-23 21:21:15,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2023-11-23 21:21:15,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:21:15,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-23 21:21:15,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:21:15,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2023-11-23 21:21:15,733 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2023-11-23 21:21:15,811 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,853 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-23 21:21:15,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 127 [2023-11-23 21:21:15,971 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,972 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:21:15,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 97 [2023-11-23 21:21:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-23 21:21:16,227 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,228 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,228 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,242 INFO L349 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2023-11-23 21:21:16,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 50 [2023-11-23 21:21:16,312 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-23 21:21:16,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2023-11-23 21:21:16,382 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,387 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-23 21:21:16,488 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,493 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-23 21:21:16,593 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-11-23 21:21:16,632 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-23 21:21:16,680 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:21:16,686 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-11-23 21:21:16,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:21:16,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 533 treesize of output 519 [2023-11-23 21:21:17,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:21:17,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 312 treesize of output 348 [2023-11-23 21:21:32,747 WARN L293 SmtUtils]: Spent 14.10s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-23 21:21:32,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:21:32,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1739 treesize of output 1615 [2023-11-23 21:21:42,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928178814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:21:42,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432847674] [2023-11-23 21:21:42,277 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-11-23 21:21:42,277 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:21:42,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:21:42,289 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:21:42,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs