./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/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_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V --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 --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:06:51,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:06:51,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:06:51,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:06:51,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:06:51,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:06:51,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:06:51,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:06:51,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:06:51,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:06:51,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:06:51,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:06:51,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:06:51,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:06:51,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:06:51,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:06:51,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:06:51,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:06:51,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:06:51,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:06:51,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:06:51,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:06:51,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:06:51,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:06:51,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:06:51,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:06:51,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:06:51,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:06:51,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:06:51,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:06:51,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:06:51,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:06:51,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:06:51,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:06:51,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:06:51,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:06:51,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:06:51,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:06:51,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:06:51,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:06:51,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:06:51,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:06:52,046 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:06:52,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:06:52,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:06:52,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:06:52,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:06:52,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:06:52,049 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:06:52,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:06:52,050 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:06:52,050 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:06:52,051 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:06:52,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:06:52,052 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:06:52,052 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:06:52,052 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:06:52,053 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:06:52,053 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:06:52,053 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:06:52,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:06:52,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:06:52,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:06:52,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:06:52,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:06:52,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:06:52,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:06:52,056 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:06:52,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:06:52,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:06:52,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:06:52,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:52,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:06:52,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:06:52,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:06:52,058 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:06:52,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:06:52,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:06:52,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:06:52,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:06:52,059 INFO L138 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_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce [2021-11-23 02:06:52,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:06:52,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:06:52,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:06:52,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:06:52,477 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:06:52,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2021-11-23 02:06:52,556 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/data/5853956f1/a96b39c0ab214ce182fefd75a47b4b6b/FLAGf4fca3386 [2021-11-23 02:06:53,606 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:06:53,607 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2021-11-23 02:06:53,692 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/data/5853956f1/a96b39c0ab214ce182fefd75a47b4b6b/FLAGf4fca3386 [2021-11-23 02:06:53,965 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/data/5853956f1/a96b39c0ab214ce182fefd75a47b4b6b [2021-11-23 02:06:53,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:06:53,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:06:53,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:53,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:06:53,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:06:53,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:53" (1/1) ... [2021-11-23 02:06:53,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438afa0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:53, skipping insertion in model container [2021-11-23 02:06:53,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:53" (1/1) ... [2021-11-23 02:06:53,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:06:54,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:06:54,523 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_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2021-11-23 02:06:54,535 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_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2021-11-23 02:06:56,056 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,064 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,065 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,066 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,069 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,093 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,097 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,098 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:56,593 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:06:56,595 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:06:56,597 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:06:56,599 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:06:56,601 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:06:56,602 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:06:56,603 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:06:56,604 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:06:56,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:06:56,607 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:06:56,897 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:06:57,079 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,079 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:57,368 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:06:57,398 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_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2021-11-23 02:06:57,402 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_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2021-11-23 02:06:57,489 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,494 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,495 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,496 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,497 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,513 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,514 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,515 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,578 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:06:57,579 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:06:57,580 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:06:57,581 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:06:57,582 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:06:57,583 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:06:57,584 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:06:57,585 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:06:57,585 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:06:57,586 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:06:57,656 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:06:57,804 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,805 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:06:57,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:58,253 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:06:58,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58 WrapperNode [2021-11-23 02:06:58,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:58,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:58,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:06:58,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:06:58,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,553 INFO L137 Inliner]: procedures = 693, calls = 2792, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 879 [2021-11-23 02:06:58,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:58,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:06:58,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:06:58,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:06:58,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:06:58,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:06:58,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:06:58,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:06:58,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (1/1) ... [2021-11-23 02:06:58,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:58,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:58,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:06:58,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:06:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2021-11-23 02:06:58,840 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2021-11-23 02:06:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-23 02:06:58,842 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-23 02:06:58,843 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2021-11-23 02:06:58,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2021-11-23 02:06:58,844 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 02:06:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:06:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-23 02:06:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-23 02:06:58,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:06:58,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:06:58,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:06:58,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:06:58,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:06:58,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:06:58,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:06:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:06:58,849 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-23 02:06:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-23 02:06:58,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:06:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:06:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:06:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:06:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:06:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-23 02:06:58,852 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-23 02:06:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:06:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-23 02:06:58,852 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-23 02:06:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-23 02:06:58,854 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-23 02:06:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:06:58,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:06:59,310 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:06:59,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:07:00,805 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:07:01,110 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:07:01,111 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:07:01,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:01 BoogieIcfgContainer [2021-11-23 02:07:01,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:07:01,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:07:01,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:07:01,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:07:01,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:53" (1/3) ... [2021-11-23 02:07:01,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d54c0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:01, skipping insertion in model container [2021-11-23 02:07:01,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:58" (2/3) ... [2021-11-23 02:07:01,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d54c0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:01, skipping insertion in model container [2021-11-23 02:07:01,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:01" (3/3) ... [2021-11-23 02:07:01,128 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_buf_harness.i [2021-11-23 02:07:01,136 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:07:01,136 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:07:01,229 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:07:01,238 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:07:01,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:07:01,263 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) [2021-11-23 02:07:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:07:01,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:01,274 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:07:01,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1565822056, now seen corresponding path program 1 times [2021-11-23 02:07:01,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100087350] [2021-11-23 02:07:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:01,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:07:02,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100087350] [2021-11-23 02:07:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100087350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:02,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:02,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:07:02,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423958233] [2021-11-23 02:07:02,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:02,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:07:02,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:07:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:07:02,215 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) [2021-11-23 02:07:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:02,450 INFO L93 Difference]: Finished difference Result 161 states and 221 transitions. [2021-11-23 02:07:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:07:02,455 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 [2021-11-23 02:07:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:02,474 INFO L225 Difference]: With dead ends: 161 [2021-11-23 02:07:02,475 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 02:07:02,481 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:07:02,495 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 12 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:02,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 348 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:07:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 02:07:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-11-23 02:07:02,605 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) [2021-11-23 02:07:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2021-11-23 02:07:02,623 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 51 [2021-11-23 02:07:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:02,625 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2021-11-23 02:07:02,626 INFO L471 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) [2021-11-23 02:07:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2021-11-23 02:07:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:07:02,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:02,632 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:07:02,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:07:02,633 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1246662955, now seen corresponding path program 1 times [2021-11-23 02:07:02,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:02,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892516222] [2021-11-23 02:07:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:02,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:07:08,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:08,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892516222] [2021-11-23 02:07:08,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892516222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:08,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967389385] [2021-11-23 02:07:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:08,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:08,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:08,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:08,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d82a4f-e9fd-449e-bd5d-4c9c32b5d957/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:07:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:09,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 02:07:09,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:09,824 INFO L388 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 18 treesize of output 14 [2021-11-23 02:07:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:07:19,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:22,768 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time...