./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91 --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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:01:54,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:01:54,127 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:01:54,137 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:01:54,138 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:01:54,177 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:01:54,178 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:01:54,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:01:54,179 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:01:54,184 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:01:54,185 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:01:54,186 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:01:54,186 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:01:54,188 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:01:54,189 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:01:54,189 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:01:54,189 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:01:54,190 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:01:54,190 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:01:54,191 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:01:54,191 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:01:54,192 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:01:54,193 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:01:54,193 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:01:54,194 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:01:54,194 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:01:54,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:01:54,195 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:01:54,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:01:54,196 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:01:54,197 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:01:54,197 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:01:54,198 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:01:54,198 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:01:54,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:01:54,198 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:01:54,199 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:01:54,199 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:01:54,199 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:01:54,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:01:54,200 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:01:54,200 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:01:54,200 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:01:54,200 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:01:54,201 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_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2023-11-25 00:01:54,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:01:54,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:01:54,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:01:54,486 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:01:54,491 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:01:54,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2023-11-25 00:01:57,490 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:01:58,029 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:01:58,030 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2023-11-25 00:01:58,074 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/data/9ef86b856/e28551e198a14bae829b12d04ccf9918/FLAG418be05e1 [2023-11-25 00:01:58,094 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/data/9ef86b856/e28551e198a14bae829b12d04ccf9918 [2023-11-25 00:01:58,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:01:58,102 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:01:58,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:01:58,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:01:58,112 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:01:58,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:01:58" (1/1) ... [2023-11-25 00:01:58,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67cd96ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:58, skipping insertion in model container [2023-11-25 00:01:58,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:01:58" (1/1) ... [2023-11-25 00:01:58,222 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:01:58,517 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_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2023-11-25 00:01:58,527 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_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2023-11-25 00:01:59,470 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,471 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,471 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,472 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,474 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,498 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,511 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,516 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,522 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,524 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,525 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:01:59,525 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,004 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:02:00,006 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:02:00,007 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:02:00,008 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:02:00,010 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:02:00,011 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:02:00,012 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:02:00,013 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:02:00,014 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:02:00,015 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:02:00,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:00,303 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:02:00,318 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_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2023-11-25 00:02:00,318 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_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2023-11-25 00:02:00,455 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,458 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,458 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,460 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,461 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,477 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,486 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,489 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,489 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,491 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,496 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,498 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,498 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:02:00,584 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:02:00,585 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:02:00,586 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:02:00,587 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:02:00,598 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:02:00,599 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:02:00,600 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:02:00,600 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:02:00,601 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:02:00,602 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:02:00,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:00,878 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,879 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,879 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,879 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,879 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,879 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,880 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,880 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,880 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,880 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,880 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,880 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,881 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,881 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,881 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,881 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:02:00,889 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:02:00,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00 WrapperNode [2023-11-25 00:02:00,890 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:00,891 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:00,891 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:02:00,891 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:02:00,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:00,966 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,006 INFO L138 Inliner]: procedures = 678, calls = 1036, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 91 [2023-11-25 00:02:01,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:01,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:02:01,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:02:01,008 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:02:01,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,074 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,087 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,101 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:02:01,107 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:02:01,107 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:02:01,107 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:02:01,108 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (1/1) ... [2023-11-25 00:02:01,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:01,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:01,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:02:01,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:02:01,203 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2023-11-25 00:02:01,204 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2023-11-25 00:02:01,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:02:01,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:02:01,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:02:01,204 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-25 00:02:01,205 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-25 00:02:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-11-25 00:02:01,205 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-11-25 00:02:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:02:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:02:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:02:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:02:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2023-11-25 00:02:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2023-11-25 00:02:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:02:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:02:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:02:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:02:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:02:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:02:01,488 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:02:01,491 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:02:01,772 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:02:01,940 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:02:01,941 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:02:01,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:01 BoogieIcfgContainer [2023-11-25 00:02:01,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:02:01,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:02:01,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:02:01,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:02:01,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:01:58" (1/3) ... [2023-11-25 00:02:01,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65244e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:01, skipping insertion in model container [2023-11-25 00:02:01,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:00" (2/3) ... [2023-11-25 00:02:01,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65244e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:01, skipping insertion in model container [2023-11-25 00:02:01,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:01" (3/3) ... [2023-11-25 00:02:01,954 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2023-11-25 00:02:01,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:02:01,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:02:02,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:02:02,049 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;@6668e1e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:02:02,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:02:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-25 00:02:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-25 00:02:02,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:02,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:02,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:02,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1509841222, now seen corresponding path program 1 times [2023-11-25 00:02:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:02,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101382122] [2023-11-25 00:02:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:02,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:04,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:04,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101382122] [2023-11-25 00:02:04,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101382122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:04,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:04,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:02:04,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140745485] [2023-11-25 00:02:04,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:04,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:02:04,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:04,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:02:04,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:02:04,639 INFO L87 Difference]: Start difference. First operand has 41 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-25 00:02:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:04,970 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2023-11-25 00:02:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:02:04,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-25 00:02:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:04,982 INFO L225 Difference]: With dead ends: 78 [2023-11-25 00:02:04,983 INFO L226 Difference]: Without dead ends: 41 [2023-11-25 00:02:04,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:02:04,990 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:04,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 200 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:02:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-25 00:02:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-25 00:02:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-25 00:02:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-25 00:02:05,036 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 16 [2023-11-25 00:02:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:05,037 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-25 00:02:05,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-25 00:02:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-25 00:02:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-25 00:02:05,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:05,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:05,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:02:05,040 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:05,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1535189014, now seen corresponding path program 1 times [2023-11-25 00:02:05,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:05,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407914751] [2023-11-25 00:02:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:05,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:05,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:05,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407914751] [2023-11-25 00:02:05,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407914751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:05,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:05,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:02:05,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845044938] [2023-11-25 00:02:05,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:05,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:02:05,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:05,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:02:05,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:02:05,230 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:02:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:05,417 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2023-11-25 00:02:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:02:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-25 00:02:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:05,419 INFO L225 Difference]: With dead ends: 79 [2023-11-25 00:02:05,419 INFO L226 Difference]: Without dead ends: 41 [2023-11-25 00:02:05,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:02:05,421 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:05,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 183 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-25 00:02:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-25 00:02:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-25 00:02:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-11-25 00:02:05,433 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2023-11-25 00:02:05,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:05,433 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-11-25 00:02:05,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:02:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-11-25 00:02:05,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:02:05,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:05,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:05,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:02:05,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:05,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1579008408, now seen corresponding path program 1 times [2023-11-25 00:02:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:05,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560595013] [2023-11-25 00:02:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:05,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:05,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:05,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560595013] [2023-11-25 00:02:05,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560595013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:05,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:05,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-25 00:02:05,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532641602] [2023-11-25 00:02:05,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:05,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:02:05,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:05,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:02:05,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:02:05,673 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:02:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:05,893 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2023-11-25 00:02:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:02:05,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-25 00:02:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:05,898 INFO L225 Difference]: With dead ends: 86 [2023-11-25 00:02:05,899 INFO L226 Difference]: Without dead ends: 47 [2023-11-25 00:02:05,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:02:05,905 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:05,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 174 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-25 00:02:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-11-25 00:02:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-25 00:02:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-11-25 00:02:05,934 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 20 [2023-11-25 00:02:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:05,934 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-11-25 00:02:05,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:02:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-11-25 00:02:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:02:05,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:05,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:05,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:02:05,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:05,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2136653132, now seen corresponding path program 1 times [2023-11-25 00:02:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081479318] [2023-11-25 00:02:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:06,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:06,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081479318] [2023-11-25 00:02:06,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081479318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:06,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:06,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-25 00:02:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118945377] [2023-11-25 00:02:06,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:06,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:02:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:06,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:02:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:02:06,263 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:02:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:06,500 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2023-11-25 00:02:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:02:06,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-25 00:02:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:06,502 INFO L225 Difference]: With dead ends: 87 [2023-11-25 00:02:06,502 INFO L226 Difference]: Without dead ends: 47 [2023-11-25 00:02:06,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:02:06,504 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:06,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 198 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:02:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-25 00:02:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-11-25 00:02:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-25 00:02:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-11-25 00:02:06,514 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2023-11-25 00:02:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:06,514 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-11-25 00:02:06,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:02:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-11-25 00:02:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:02:06,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:06,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:06,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:02:06,516 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:06,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1894742381, now seen corresponding path program 1 times [2023-11-25 00:02:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:06,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964882757] [2023-11-25 00:02:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:07,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964882757] [2023-11-25 00:02:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964882757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:07,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:07,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-25 00:02:07,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640235916] [2023-11-25 00:02:07,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:07,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:02:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:02:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:02:07,886 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 12 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:02:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:08,418 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2023-11-25 00:02:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-25 00:02:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2023-11-25 00:02:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:08,425 INFO L225 Difference]: With dead ends: 85 [2023-11-25 00:02:08,425 INFO L226 Difference]: Without dead ends: 48 [2023-11-25 00:02:08,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:02:08,426 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:08,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 238 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:02:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-25 00:02:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-11-25 00:02:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-25 00:02:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-11-25 00:02:08,439 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 24 [2023-11-25 00:02:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:08,440 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-11-25 00:02:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:02:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-11-25 00:02:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-25 00:02:08,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:08,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:08,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:02:08,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:08,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash -345146155, now seen corresponding path program 1 times [2023-11-25 00:02:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750282725] [2023-11-25 00:02:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:09,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:09,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750282725] [2023-11-25 00:02:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750282725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:09,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83561687] [2023-11-25 00:02:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:09,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:09,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:09,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:09,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:02:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:09,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-25 00:02:09,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:15,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:16,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83561687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:16,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600220725] [2023-11-25 00:02:16,467 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-25 00:02:16,467 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:16,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:02:16,476 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:02:16,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:02:16,572 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_init with input of size 108 for LOIs [2023-11-25 00:02:17,732 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 163 for LOIs [2023-11-25 00:02:17,875 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 173 for LOIs [2023-11-25 00:02:18,335 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2023-11-25 00:02:18,360 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2023-11-25 00:02:18,418 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:02:32,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1183#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~tl_last_error~0 0) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| Int) (|v_old(#memory_real)_BEFORE_CALL_5| (Array Int (Array Int Real))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_5| (Array Int (Array Int Int))) (|v_#memory_real_6| (Array Int (Array Int Real))) (|v_#memory_real_7| (Array Int (Array Int Real))) (|v_#memory_real_8| (Array Int (Array Int Real))) (|v_#memory_int_8| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_5| (Array Int (Array Int Int))) (|v_#memory_int_7| (Array Int (Array Int Int))) (|v_#memory_int_6| (Array Int (Array Int Int))) (|v_#length_8| (Array Int Int)) (|v_#valid_18| (Array Int Int)) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_5| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_8| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (select |v_#memory_int_8| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 16 (select (select |#memory_int| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 16)))) (= (store |v_#valid_18| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| 1) |#valid|) (= (select |v_#valid_18| 2) 1) (= (select |v_#valid_18| 0) 0) (= 1 (select |v_#valid_18| 1)) (= 31 (select |v_#length_8| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_5| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_5| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (store |v_#memory_int_7| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (select |v_#memory_int_7| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 24 (select (select |v_#memory_int_8| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 24))) |v_#memory_int_8|) (= |#memory_real| (store |v_#memory_real_6| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (select |v_#memory_real_6| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 16 (select (select |#memory_real| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 16)))) (= (select |v_#length_8| 3) 12) (= |#memory_$Pointer$.base| (store |v_old(#memory_$Pointer$.base)_BEFORE_CALL_5| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (store (store (store (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_5| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 0 |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 8 0) 24 |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 16 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_5| 4) 24)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 0)) (= (store |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_5| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (store (store (store (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_5| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 0 16) 8 0) 24 0) 16 0)) |#memory_$Pointer$.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 1) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) (= (select |v_#length_8| 4) 40) (= (store |v_#memory_real_7| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (select |v_#memory_real_7| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 24 (select (select |v_#memory_real_6| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 24))) |v_#memory_real_6|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_5| 4) 16)) (= (select |v_#valid_18| 4) 1) (= (store |v_#memory_int_6| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (select |v_#memory_int_6| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 8 (select (select |v_#memory_int_7| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 8))) |v_#memory_int_7|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_5| 4) 32) 0) (= (store |v_old(#memory_int)_BEFORE_CALL_5| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (select |v_old(#memory_int)_BEFORE_CALL_5| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 0 (select (select |v_#memory_int_6| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 0))) |v_#memory_int_6|) (= (store |v_old(#memory_real)_BEFORE_CALL_5| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (select |v_old(#memory_real)_BEFORE_CALL_5| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 0 (select (select |v_#memory_real_8| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 0))) |v_#memory_real_8|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_5| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_5| 4) 32) 0) (= (select |v_#valid_18| 3) 1) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_5| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select |v_#valid_18| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_5| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#length| (store |v_#length_8| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| 32)) (= (store |v_#memory_real_8| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (store (select |v_#memory_real_8| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 8 (select (select |v_#memory_real_7| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) 8))) |v_#memory_real_7|) (= (select |v_#length_8| 1) 2) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_5| 4) 24)))))' at error location [2023-11-25 00:02:32,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:02:32,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:32,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 6] total 22 [2023-11-25 00:02:32,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079910545] [2023-11-25 00:02:32,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:32,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-25 00:02:32,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-25 00:02:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2023-11-25 00:02:32,620 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 9 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-25 00:02:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:35,626 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2023-11-25 00:02:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-25 00:02:35,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 9 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 26 [2023-11-25 00:02:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:35,628 INFO L225 Difference]: With dead ends: 98 [2023-11-25 00:02:35,628 INFO L226 Difference]: Without dead ends: 58 [2023-11-25 00:02:35,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2023-11-25 00:02:35,631 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:35,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 269 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-25 00:02:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-25 00:02:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-11-25 00:02:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-25 00:02:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-11-25 00:02:35,657 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2023-11-25 00:02:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:35,658 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-11-25 00:02:35,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 9 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-25 00:02:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-11-25 00:02:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-25 00:02:35,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:35,659 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:35,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:35,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-25 00:02:35,861 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:35,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1655902441, now seen corresponding path program 1 times [2023-11-25 00:02:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:35,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198519167] [2023-11-25 00:02:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:35,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:36,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:36,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198519167] [2023-11-25 00:02:36,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198519167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:36,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:36,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:02:36,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460697163] [2023-11-25 00:02:36,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:36,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:02:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:36,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:02:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:02:36,046 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:02:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:36,192 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2023-11-25 00:02:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:02:36,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-11-25 00:02:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:36,194 INFO L225 Difference]: With dead ends: 61 [2023-11-25 00:02:36,194 INFO L226 Difference]: Without dead ends: 59 [2023-11-25 00:02:36,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:02:36,195 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:36,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 245 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-25 00:02:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-11-25 00:02:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 38 states have internal predecessors, (41), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2023-11-25 00:02:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2023-11-25 00:02:36,229 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 27 [2023-11-25 00:02:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:36,229 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2023-11-25 00:02:36,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:02:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2023-11-25 00:02:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-25 00:02:36,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:36,231 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, 1, 1] [2023-11-25 00:02:36,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:02:36,232 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:02:36,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 728128336, now seen corresponding path program 1 times [2023-11-25 00:02:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:36,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51209453] [2023-11-25 00:02:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:37,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:37,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51209453] [2023-11-25 00:02:37,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51209453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:37,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498362545] [2023-11-25 00:02:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:37,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:37,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:37,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:37,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dc4f6a6-afcc-4e5e-a6d5-279db26ebce9/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:02:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:37,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-25 00:02:37,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:37,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2023-11-25 00:02:37,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2023-11-25 00:02:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:50,249 INFO L327 TraceCheckSpWp]: Computing backward predicates...