./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 04:01:20,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:20,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:20,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:20,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:20,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:20,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:20,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:20,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:20,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:20,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:20,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:20,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:20,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:20,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:20,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:20,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:20,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:20,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:20,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:20,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:20,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:20,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:20,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:20,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:20,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:20,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:20,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:20,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:20,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:20,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:20,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:20,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:20,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:20,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:20,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:20,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:20,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:20,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:20,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:20,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:20,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:01:20,714 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:20,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:20,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:20,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:20,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:20,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:20,717 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:20,717 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:20,717 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:20,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:01:20,718 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:20,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:20,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:01:20,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:01:20,719 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:20,719 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:01:20,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:01:20,719 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:01:20,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:20,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:01:20,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:20,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:20,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:20,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:20,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:20,722 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:20,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:20,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:20,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:20,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:20,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:20,723 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:01:20,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:20,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:20,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:01:20,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:01:20,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:20,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:20,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce [2022-11-03 04:01:20,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:21,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:21,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:21,013 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:21,014 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:21,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2022-11-03 04:01:21,097 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/data/107f63221/9ca16da7e5d64ad5a2493e996ad1242e/FLAG32748f9bd [2022-11-03 04:01:21,869 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:21,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2022-11-03 04:01:21,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/data/107f63221/9ca16da7e5d64ad5a2493e996ad1242e/FLAG32748f9bd [2022-11-03 04:01:22,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/data/107f63221/9ca16da7e5d64ad5a2493e996ad1242e [2022-11-03 04:01:22,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:22,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:22,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:22,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:22,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:22,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a9e28ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:22, skipping insertion in model container [2022-11-03 04:01:22,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:22" (1/1) ... [2022-11-03 04:01:22,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:22,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:22,840 WARN L230 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_f410676a-4911-4447-8ac6-c88c3ed497c0/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2022-11-03 04:01:22,849 WARN L230 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_f410676a-4911-4447-8ac6-c88c3ed497c0/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2022-11-03 04:01:23,643 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:23,644 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:23,644 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:23,645 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:23,646 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:23,660 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:23,661 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:23,663 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:23,663 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,039 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 04:01:24,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 04:01:24,042 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 04:01:24,043 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 04:01:24,045 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 04:01:24,045 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 04:01:24,046 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 04:01:24,047 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 04:01:24,047 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 04:01:24,048 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 04:01:24,314 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 04:01:24,466 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,467 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:24,663 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:24,698 WARN L230 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_f410676a-4911-4447-8ac6-c88c3ed497c0/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2022-11-03 04:01:24,698 WARN L230 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_f410676a-4911-4447-8ac6-c88c3ed497c0/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2022-11-03 04:01:24,734 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,734 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,735 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,735 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,735 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,741 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,742 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,743 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,743 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,794 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 04:01:24,794 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 04:01:24,795 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 04:01:24,796 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 04:01:24,816 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 04:01:24,816 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 04:01:24,818 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 04:01:24,819 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 04:01:24,819 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 04:01:24,820 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 04:01:24,850 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 04:01:24,899 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,899 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 04:01:24,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:25,232 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:25,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25 WrapperNode [2022-11-03 04:01:25,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:25,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:25,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:25,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:25,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,486 INFO L138 Inliner]: procedures = 693, calls = 2792, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 879 [2022-11-03 04:01:25,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:25,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:01:25,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:01:25,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:01:25,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:01:25,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:01:25,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:01:25,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:01:25,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (1/1) ... [2022-11-03 04:01:25,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:25,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:01:25,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:01:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-11-03 04:01:25,687 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-11-03 04:01:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-03 04:01:25,688 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-03 04:01:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-11-03 04:01:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-11-03 04:01:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 04:01:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:01:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-03 04:01:25,690 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-03 04:01:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 04:01:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 04:01:25,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 04:01:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:01:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:01:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 04:01:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:01:25,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:01:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-03 04:01:25,693 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-03 04:01:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 04:01:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 04:01:25,693 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 04:01:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:01:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 04:01:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2022-11-03 04:01:25,694 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2022-11-03 04:01:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 04:01:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-03 04:01:25,694 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-03 04:01:25,695 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 04:01:25,695 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 04:01:25,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 04:01:25,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:01:26,092 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:01:26,098 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:01:27,590 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:01:27,949 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:01:27,950 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 04:01:27,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:27 BoogieIcfgContainer [2022-11-03 04:01:27,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:01:27,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:01:27,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:01:27,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:01:27,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:22" (1/3) ... [2022-11-03 04:01:27,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abfe980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:27, skipping insertion in model container [2022-11-03 04:01:27,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:25" (2/3) ... [2022-11-03 04:01:27,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abfe980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:27, skipping insertion in model container [2022-11-03 04:01:27,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:27" (3/3) ... [2022-11-03 04:01:27,971 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_buf_harness.i [2022-11-03 04:01:27,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:01:27,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:01:28,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:01:28,090 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38b5bc16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:01:28,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:01:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-03 04:01:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 04:01:28,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:28,111 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:28,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1565822056, now seen corresponding path program 1 times [2022-11-03 04:01:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:28,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939880169] [2022-11-03 04:01:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:28,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 04:01:29,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939880169] [2022-11-03 04:01:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939880169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:29,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:29,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:29,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934761794] [2022-11-03 04:01:29,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:29,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:29,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:29,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:29,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:29,623 INFO L87 Difference]: Start difference. First operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 04:01:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:29,891 INFO L93 Difference]: Finished difference Result 161 states and 221 transitions. [2022-11-03 04:01:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:01:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 51 [2022-11-03 04:01:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:29,912 INFO L225 Difference]: With dead ends: 161 [2022-11-03 04:01:29,913 INFO L226 Difference]: Without dead ends: 125 [2022-11-03 04:01:29,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:29,926 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 12 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:29,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 347 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-03 04:01:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-03 04:01:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 70 states have internal predecessors, (84), 43 states have call successors, (43), 10 states have call predecessors, (43), 10 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-03 04:01:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2022-11-03 04:01:30,004 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 51 [2022-11-03 04:01:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:30,005 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2022-11-03 04:01:30,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 04:01:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2022-11-03 04:01:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 04:01:30,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:30,008 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:30,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:01:30,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1246662955, now seen corresponding path program 1 times [2022-11-03 04:01:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:30,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112838618] [2022-11-03 04:01:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:30,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 04:01:44,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112838618] [2022-11-03 04:01:44,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112838618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:44,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739210604] [2022-11-03 04:01:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:44,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:44,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:44,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:44,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f410676a-4911-4447-8ac6-c88c3ed497c0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:01:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:01:45,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:45,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 04:01:45,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 04:01:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:01:53,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:56,042 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-03 04:10:27,468 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.