./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5 --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 bca4b7f65023d274ad237b41a825fac42415122ae61b05dbfa5b2d3344a9d32a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:45:00,401 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:45:00,479 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:45:00,486 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:45:00,487 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:45:00,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:45:00,517 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:45:00,518 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:45:00,519 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:45:00,520 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:45:00,520 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:45:00,521 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:45:00,522 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:45:00,522 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:45:00,523 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:45:00,523 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:45:00,524 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:45:00,525 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:45:00,525 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:45:00,526 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:45:00,526 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:45:00,527 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:45:00,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:45:00,528 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:45:00,529 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:45:00,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:45:00,530 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:45:00,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:45:00,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:45:00,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:45:00,532 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:45:00,532 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:45:00,533 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:45:00,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:45:00,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:45:00,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:45:00,535 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:45:00,535 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:45:00,536 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:45:00,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:45:00,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:45:00,538 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:45:00,538 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:45:00,538 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:45:00,539 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_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bca4b7f65023d274ad237b41a825fac42415122ae61b05dbfa5b2d3344a9d32a [2023-11-21 19:45:00,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:45:00,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:45:00,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:45:00,887 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:45:00,887 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:45:00,889 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i [2023-11-21 19:45:04,217 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:45:04,822 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:45:04,824 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i [2023-11-21 19:45:04,869 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/data/00e30b958/d85bf9c9c8634481a1ea7cb78fdbe2bd/FLAG2cb4f4755 [2023-11-21 19:45:04,891 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/data/00e30b958/d85bf9c9c8634481a1ea7cb78fdbe2bd [2023-11-21 19:45:04,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:45:04,899 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:45:04,903 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:45:04,903 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:45:04,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:45:04,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:45:04" (1/1) ... [2023-11-21 19:45:04,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5e6f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:04, skipping insertion in model container [2023-11-21 19:45:04,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:45:04" (1/1) ... [2023-11-21 19:45:05,056 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:45:05,426 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_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i[4501,4514] [2023-11-21 19:45:05,435 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_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i[4561,4574] [2023-11-21 19:45:06,516 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,517 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,518 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,519 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,521 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,549 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,549 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,552 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,552 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,554 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,555 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,556 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:06,557 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,035 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 19:45:07,037 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 19:45:07,038 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 19:45:07,039 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 19:45:07,041 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 19:45:07,042 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 19:45:07,043 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 19:45:07,044 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 19:45:07,044 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 19:45:07,045 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 19:45:07,281 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,289 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,415 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,417 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,417 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,418 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,420 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,420 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,421 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,422 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,422 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,422 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,423 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,423 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,424 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,428 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,429 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,429 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,431 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,455 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,456 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,456 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:45:07,530 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:45:07,560 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_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i[4501,4514] [2023-11-21 19:45:07,563 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_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/sv-benchmarks/c/aws-c-common/aws_priority_queue_push_ref_harness_negated.i[4561,4574] [2023-11-21 19:45:07,639 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,640 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,640 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,641 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,641 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,649 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,649 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,650 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,651 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,652 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,653 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,653 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,654 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,705 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 19:45:07,707 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 19:45:07,708 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 19:45:07,708 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 19:45:07,710 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 19:45:07,710 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 19:45:07,711 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 19:45:07,711 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 19:45:07,712 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 19:45:07,712 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 19:45:07,772 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,781 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,789 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7739-7750] [2023-11-21 19:45:07,890 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,891 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,891 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,892 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,892 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,893 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,893 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,895 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,895 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,895 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,901 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,901 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,902 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,902 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,905 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,925 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,926 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,926 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:45:07,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:45:08,334 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,335 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,336 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,336 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,336 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,337 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,337 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,338 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,338 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,338 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,338 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,338 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,339 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,339 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,339 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:45:08,348 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:45:08,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08 WrapperNode [2023-11-21 19:45:08,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:45:08,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:45:08,351 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:45:08,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:45:08,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,628 INFO L138 Inliner]: procedures = 696, calls = 1881, calls flagged for inlining = 58, calls inlined = 17, statements flattened = 1147 [2023-11-21 19:45:08,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:45:08,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:45:08,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:45:08,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:45:08,641 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,664 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,742 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,761 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,769 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:45:08,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:45:08,787 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:45:08,787 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:45:08,788 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (1/1) ... [2023-11-21 19:45:08,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:45:08,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:08,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:45:08,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:45:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure s_swap [2023-11-21 19:45:08,921 INFO L138 BoogieDeclarations]: Found implementation of procedure s_swap [2023-11-21 19:45:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_init_dynamic [2023-11-21 19:45:08,921 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_init_dynamic [2023-11-21 19:45:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-21 19:45:08,922 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-21 19:45:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:45:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-21 19:45:08,922 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-21 19:45:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-21 19:45:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-21 19:45:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-21 19:45:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-21 19:45:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-21 19:45:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-21 19:45:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_up [2023-11-21 19:45:08,924 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_up [2023-11-21 19:45:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:45:08,924 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-21 19:45:08,924 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-21 19:45:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:45:08,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:45:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:45:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:45:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:45:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure my_abort [2023-11-21 19:45:08,927 INFO L138 BoogieDeclarations]: Found implementation of procedure my_abort [2023-11-21 19:45:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-21 19:45:08,927 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-21 19:45:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:45:08,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:45:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-21 19:45:08,928 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-21 19:45:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-21 19:45:08,929 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-21 19:45:08,930 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-21 19:45:08,932 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-21 19:45:08,933 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-21 19:45:08,933 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-21 19:45:08,933 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-21 19:45:08,934 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-21 19:45:08,934 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-21 19:45:08,935 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-21 19:45:08,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 19:45:08,935 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 19:45:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:45:08,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:45:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-21 19:45:08,941 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-21 19:45:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_pop_back [2023-11-21 19:45:08,941 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_pop_back [2023-11-21 19:45:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2023-11-21 19:45:08,942 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2023-11-21 19:45:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:45:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-21 19:45:08,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-21 19:45:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:45:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:45:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_push_ref [2023-11-21 19:45:08,943 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_push_ref [2023-11-21 19:45:08,943 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at_ptr [2023-11-21 19:45:08,944 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at_ptr [2023-11-21 19:45:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-21 19:45:08,944 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-21 19:45:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-21 19:45:08,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-21 19:45:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-21 19:45:08,945 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-21 19:45:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:45:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-21 19:45:08,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-21 19:45:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_set_at [2023-11-21 19:45:08,945 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_set_at [2023-11-21 19:45:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_backpointer_index_valid [2023-11-21 19:45:08,946 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_backpointer_index_valid [2023-11-21 19:45:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 19:45:08,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 19:45:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:45:09,418 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:45:09,421 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:45:11,182 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:45:11,608 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:45:11,608 INFO L308 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-21 19:45:11,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:11 BoogieIcfgContainer [2023-11-21 19:45:11,611 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:45:11,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:45:11,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:45:11,617 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:45:11,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:45:04" (1/3) ... [2023-11-21 19:45:11,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30516426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:45:11, skipping insertion in model container [2023-11-21 19:45:11,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:45:08" (2/3) ... [2023-11-21 19:45:11,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30516426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:45:11, skipping insertion in model container [2023-11-21 19:45:11,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:45:11" (3/3) ... [2023-11-21 19:45:11,622 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_push_ref_harness_negated.i [2023-11-21 19:45:11,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:45:11,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:45:11,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:45:11,743 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;@15d6308f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:45:11,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:45:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 461 states, 233 states have (on average 1.201716738197425) internal successors, (280), 236 states have internal predecessors, (280), 193 states have call successors, (193), 33 states have call predecessors, (193), 33 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2023-11-21 19:45:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-21 19:45:11,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:11,778 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:11,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:11,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:11,789 INFO L85 PathProgramCache]: Analyzing trace with hash 936921, now seen corresponding path program 1 times [2023-11-21 19:45:11,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:11,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138551456] [2023-11-21 19:45:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:11,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-21 19:45:13,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:13,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138551456] [2023-11-21 19:45:13,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138551456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:45:13,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148135786] [2023-11-21 19:45:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:13,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:13,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:13,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:13,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:45:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:13,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 2368 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 19:45:13,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-21 19:45:14,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148135786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:14,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:45:14,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-21 19:45:14,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411079337] [2023-11-21 19:45:14,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:14,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:45:14,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:14,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:45:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:45:14,190 INFO L87 Difference]: Start difference. First operand has 461 states, 233 states have (on average 1.201716738197425) internal successors, (280), 236 states have internal predecessors, (280), 193 states have call successors, (193), 33 states have call predecessors, (193), 33 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-21 19:45:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:15,198 INFO L93 Difference]: Finished difference Result 895 states and 1358 transitions. [2023-11-21 19:45:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:45:15,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 123 [2023-11-21 19:45:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:15,228 INFO L225 Difference]: With dead ends: 895 [2023-11-21 19:45:15,228 INFO L226 Difference]: Without dead ends: 460 [2023-11-21 19:45:15,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:45:15,251 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 18 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:15,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2349 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:45:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-11-21 19:45:15,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2023-11-21 19:45:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 232 states have (on average 1.1896551724137931) internal successors, (276), 235 states have internal predecessors, (276), 193 states have call successors, (193), 33 states have call predecessors, (193), 33 states have return successors, (199), 191 states have call predecessors, (199), 191 states have call successors, (199) [2023-11-21 19:45:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 668 transitions. [2023-11-21 19:45:15,385 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 668 transitions. Word has length 123 [2023-11-21 19:45:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:15,386 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 668 transitions. [2023-11-21 19:45:15,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-21 19:45:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 668 transitions. [2023-11-21 19:45:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-21 19:45:15,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:15,400 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:15,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:15,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 19:45:15,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:15,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1134131298, now seen corresponding path program 1 times [2023-11-21 19:45:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:15,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955713924] [2023-11-21 19:45:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 19:45:16,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:16,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955713924] [2023-11-21 19:45:16,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955713924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:45:16,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161299204] [2023-11-21 19:45:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:16,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:16,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:16,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:45:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:17,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:45:17,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-21 19:45:17,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:17,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161299204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:17,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:45:17,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-21 19:45:17,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324523567] [2023-11-21 19:45:17,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:17,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:45:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:45:17,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:45:17,275 INFO L87 Difference]: Start difference. First operand 460 states and 668 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-11-21 19:45:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:18,547 INFO L93 Difference]: Finished difference Result 905 states and 1354 transitions. [2023-11-21 19:45:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:45:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 131 [2023-11-21 19:45:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:18,558 INFO L225 Difference]: With dead ends: 905 [2023-11-21 19:45:18,558 INFO L226 Difference]: Without dead ends: 473 [2023-11-21 19:45:18,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:45:18,563 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 32 mSDsluCounter, 2737 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3309 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:18,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3309 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-21 19:45:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-11-21 19:45:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2023-11-21 19:45:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 240 states have (on average 1.1916666666666667) internal successors, (286), 243 states have internal predecessors, (286), 195 states have call successors, (195), 33 states have call predecessors, (195), 34 states have return successors, (233), 194 states have call predecessors, (233), 193 states have call successors, (233) [2023-11-21 19:45:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 714 transitions. [2023-11-21 19:45:18,628 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 714 transitions. Word has length 131 [2023-11-21 19:45:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:18,629 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 714 transitions. [2023-11-21 19:45:18,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-11-21 19:45:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 714 transitions. [2023-11-21 19:45:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-21 19:45:18,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:18,632 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:18,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:18,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:18,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:18,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash -594398422, now seen corresponding path program 1 times [2023-11-21 19:45:18,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:18,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257124335] [2023-11-21 19:45:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:18,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:19,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:45:19,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900596191] [2023-11-21 19:45:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:19,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:19,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:19,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:45:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:19,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 2550 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:45:19,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-21 19:45:19,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:19,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:19,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257124335] [2023-11-21 19:45:19,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:45:19,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900596191] [2023-11-21 19:45:19,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900596191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:19,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:19,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:45:19,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296264512] [2023-11-21 19:45:19,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:19,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:45:19,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:19,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:45:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:45:19,742 INFO L87 Difference]: Start difference. First operand 471 states and 714 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-21 19:45:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:20,619 INFO L93 Difference]: Finished difference Result 920 states and 1411 transitions. [2023-11-21 19:45:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:45:20,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 140 [2023-11-21 19:45:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:20,626 INFO L225 Difference]: With dead ends: 920 [2023-11-21 19:45:20,627 INFO L226 Difference]: Without dead ends: 477 [2023-11-21 19:45:20,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:45:20,631 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 25 mSDsluCounter, 2321 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:20,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2918 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:45:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-11-21 19:45:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 471. [2023-11-21 19:45:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 240 states have (on average 1.1916666666666667) internal successors, (286), 243 states have internal predecessors, (286), 195 states have call successors, (195), 33 states have call predecessors, (195), 34 states have return successors, (233), 194 states have call predecessors, (233), 193 states have call successors, (233) [2023-11-21 19:45:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 714 transitions. [2023-11-21 19:45:20,680 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 714 transitions. Word has length 140 [2023-11-21 19:45:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:20,681 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 714 transitions. [2023-11-21 19:45:20,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-21 19:45:20,682 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 714 transitions. [2023-11-21 19:45:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-21 19:45:20,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:20,685 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:20,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:20,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:20,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:20,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1781899196, now seen corresponding path program 1 times [2023-11-21 19:45:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:20,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24936102] [2023-11-21 19:45:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:20,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:21,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:45:21,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716576415] [2023-11-21 19:45:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:21,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:21,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:21,063 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:21,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:45:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:21,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:45:21,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-21 19:45:21,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:21,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24936102] [2023-11-21 19:45:21,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:45:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716576415] [2023-11-21 19:45:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716576415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:21,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:45:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752374111] [2023-11-21 19:45:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:21,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:45:21,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:45:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:45:21,835 INFO L87 Difference]: Start difference. First operand 471 states and 714 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-21 19:45:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:23,210 INFO L93 Difference]: Finished difference Result 922 states and 1408 transitions. [2023-11-21 19:45:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 19:45:23,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 148 [2023-11-21 19:45:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:23,216 INFO L225 Difference]: With dead ends: 922 [2023-11-21 19:45:23,216 INFO L226 Difference]: Without dead ends: 479 [2023-11-21 19:45:23,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:45:23,219 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 48 mSDsluCounter, 3256 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3820 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:23,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3820 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 19:45:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-21 19:45:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 471. [2023-11-21 19:45:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 240 states have (on average 1.1916666666666667) internal successors, (286), 243 states have internal predecessors, (286), 195 states have call successors, (195), 33 states have call predecessors, (195), 34 states have return successors, (233), 194 states have call predecessors, (233), 193 states have call successors, (233) [2023-11-21 19:45:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 714 transitions. [2023-11-21 19:45:23,266 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 714 transitions. Word has length 148 [2023-11-21 19:45:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:23,267 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 714 transitions. [2023-11-21 19:45:23,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-21 19:45:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 714 transitions. [2023-11-21 19:45:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-21 19:45:23,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:23,270 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:23,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:23,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:23,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:23,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1103863204, now seen corresponding path program 2 times [2023-11-21 19:45:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:23,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962368825] [2023-11-21 19:45:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:23,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:45:23,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441132999] [2023-11-21 19:45:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:45:23,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:23,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:23,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:23,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:45:24,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-21 19:45:24,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:45:24,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:45:24,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-11-21 19:45:24,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:24,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962368825] [2023-11-21 19:45:24,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:45:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441132999] [2023-11-21 19:45:24,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441132999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:24,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:24,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:45:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164985560] [2023-11-21 19:45:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:24,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:45:24,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:24,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:45:24,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:45:24,235 INFO L87 Difference]: Start difference. First operand 471 states and 714 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-21 19:45:24,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:24,791 INFO L93 Difference]: Finished difference Result 479 states and 722 transitions. [2023-11-21 19:45:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:45:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 157 [2023-11-21 19:45:24,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:24,797 INFO L225 Difference]: With dead ends: 479 [2023-11-21 19:45:24,797 INFO L226 Difference]: Without dead ends: 477 [2023-11-21 19:45:24,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:45:24,798 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 5 mSDsluCounter, 2409 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3020 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:24,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3020 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:45:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-11-21 19:45:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 476. [2023-11-21 19:45:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 243 states have (on average 1.1893004115226338) internal successors, (289), 246 states have internal predecessors, (289), 196 states have call successors, (196), 34 states have call predecessors, (196), 35 states have return successors, (234), 195 states have call predecessors, (234), 194 states have call successors, (234) [2023-11-21 19:45:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 719 transitions. [2023-11-21 19:45:24,892 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 719 transitions. Word has length 157 [2023-11-21 19:45:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:24,895 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 719 transitions. [2023-11-21 19:45:24,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-21 19:45:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 719 transitions. [2023-11-21 19:45:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-21 19:45:24,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:24,900 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:24,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:25,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:25,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:25,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash -680198872, now seen corresponding path program 3 times [2023-11-21 19:45:25,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:25,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256175473] [2023-11-21 19:45:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:25,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:25,259 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:45:25,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364053823] [2023-11-21 19:45:25,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 19:45:25,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:25,261 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:25,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:45:25,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 19:45:25,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:45:25,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 19:45:25,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-21 19:45:25,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:25,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:25,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256175473] [2023-11-21 19:45:25,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:45:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364053823] [2023-11-21 19:45:25,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364053823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:25,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:25,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:45:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834326487] [2023-11-21 19:45:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:25,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:45:25,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:45:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:45:25,804 INFO L87 Difference]: Start difference. First operand 476 states and 719 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 4 states have call successors, (29) [2023-11-21 19:45:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:27,164 INFO L93 Difference]: Finished difference Result 989 states and 1513 transitions. [2023-11-21 19:45:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 19:45:27,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 4 states have call successors, (29) Word has length 166 [2023-11-21 19:45:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:27,171 INFO L225 Difference]: With dead ends: 989 [2023-11-21 19:45:27,172 INFO L226 Difference]: Without dead ends: 557 [2023-11-21 19:45:27,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:45:27,176 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 71 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 4237 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:27,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 4237 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-21 19:45:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-11-21 19:45:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 549. [2023-11-21 19:45:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 285 states have (on average 1.2035087719298245) internal successors, (343), 290 states have internal predecessors, (343), 225 states have call successors, (225), 35 states have call predecessors, (225), 37 states have return successors, (277), 223 states have call predecessors, (277), 223 states have call successors, (277) [2023-11-21 19:45:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 845 transitions. [2023-11-21 19:45:27,225 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 845 transitions. Word has length 166 [2023-11-21 19:45:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:27,226 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 845 transitions. [2023-11-21 19:45:27,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (29), 3 states have call predecessors, (29), 4 states have call successors, (29) [2023-11-21 19:45:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 845 transitions. [2023-11-21 19:45:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-21 19:45:27,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:27,230 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:27,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-21 19:45:27,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:27,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:27,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash 33571604, now seen corresponding path program 4 times [2023-11-21 19:45:27,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:27,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117685414] [2023-11-21 19:45:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:27,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:27,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:45:27,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711994741] [2023-11-21 19:45:27,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 19:45:27,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:27,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:27,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:27,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:45:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:28,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 3000 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:45:28,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-21 19:45:28,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:28,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:28,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117685414] [2023-11-21 19:45:28,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:45:28,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711994741] [2023-11-21 19:45:28,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711994741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:28,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:28,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 19:45:28,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384115761] [2023-11-21 19:45:28,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:28,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:45:28,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:45:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:45:28,595 INFO L87 Difference]: Start difference. First operand 549 states and 845 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 4 states have call successors, (29) [2023-11-21 19:45:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:29,434 INFO L93 Difference]: Finished difference Result 940 states and 1428 transitions. [2023-11-21 19:45:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:45:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 4 states have call successors, (29) Word has length 175 [2023-11-21 19:45:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:29,440 INFO L225 Difference]: With dead ends: 940 [2023-11-21 19:45:29,440 INFO L226 Difference]: Without dead ends: 478 [2023-11-21 19:45:29,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:45:29,445 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 85 mSDsluCounter, 2815 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:29,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 3408 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 19:45:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-11-21 19:45:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2023-11-21 19:45:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 244 states have (on average 1.1885245901639345) internal successors, (290), 248 states have internal predecessors, (290), 196 states have call successors, (196), 34 states have call predecessors, (196), 36 states have return successors, (238), 195 states have call predecessors, (238), 194 states have call successors, (238) [2023-11-21 19:45:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 724 transitions. [2023-11-21 19:45:29,484 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 724 transitions. Word has length 175 [2023-11-21 19:45:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:29,485 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 724 transitions. [2023-11-21 19:45:29,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 4 states have call successors, (29) [2023-11-21 19:45:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 724 transitions. [2023-11-21 19:45:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-21 19:45:29,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:29,488 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:29,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-21 19:45:29,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 19:45:29,703 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:29,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1695668401, now seen corresponding path program 1 times [2023-11-21 19:45:29,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:29,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736045351] [2023-11-21 19:45:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:29,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:29,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:45:29,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100153856] [2023-11-21 19:45:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:29,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:29,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:29,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:29,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 19:45:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:45:30,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 2918 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:45:30,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-21 19:45:30,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:45:30,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:30,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736045351] [2023-11-21 19:45:30,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:45:30,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100153856] [2023-11-21 19:45:30,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100153856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:45:30,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:45:30,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 19:45:30,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331643343] [2023-11-21 19:45:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:45:30,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 19:45:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:45:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 19:45:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:45:30,812 INFO L87 Difference]: Start difference. First operand 478 states and 724 transitions. Second operand has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) [2023-11-21 19:45:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:45:31,997 INFO L93 Difference]: Finished difference Result 925 states and 1409 transitions. [2023-11-21 19:45:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 19:45:31,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) Word has length 174 [2023-11-21 19:45:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:45:32,002 INFO L225 Difference]: With dead ends: 925 [2023-11-21 19:45:32,003 INFO L226 Difference]: Without dead ends: 486 [2023-11-21 19:45:32,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:45:32,008 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 99 mSDsluCounter, 3745 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 4311 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:45:32,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 4311 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 19:45:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-11-21 19:45:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 484. [2023-11-21 19:45:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 249 states have (on average 1.1887550200803212) internal successors, (296), 252 states have internal predecessors, (296), 197 states have call successors, (197), 34 states have call predecessors, (197), 36 states have return successors, (239), 197 states have call predecessors, (239), 195 states have call successors, (239) [2023-11-21 19:45:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 732 transitions. [2023-11-21 19:45:32,046 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 732 transitions. Word has length 174 [2023-11-21 19:45:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:45:32,049 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 732 transitions. [2023-11-21 19:45:32,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 5 states have call successors, (30) [2023-11-21 19:45:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 732 transitions. [2023-11-21 19:45:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-11-21 19:45:32,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:45:32,052 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:45:32,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 19:45:32,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:32,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:45:32,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:45:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1575847489, now seen corresponding path program 2 times [2023-11-21 19:45:32,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:45:32,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009341239] [2023-11-21 19:45:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:45:32,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:45:32,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:45:32,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297755479] [2023-11-21 19:45:32,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:45:32,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:45:32,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:45:32,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:45:32,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b74bfa-dac3-4b21-9c42-8ecae0cb2517/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 19:45:33,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 19:45:33,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:45:33,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 19:45:33,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:45:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-11-21 19:45:33,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:45:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2023-11-21 19:45:33,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:45:33,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009341239] [2023-11-21 19:45:33,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:45:33,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297755479] [2023-11-21 19:45:33,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297755479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:45:33,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777810414] [2023-11-21 19:45:33,720 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-11-21 19:45:33,720 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:45:33,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:45:33,730 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:45:33,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs