./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/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_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/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_0ecdbe11-1613-4884-b616-f4a2ef9e0934/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 caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a --- 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 02:46:58,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:46:58,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:46:58,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:46:58,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:46:58,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:46:58,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:46:58,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:46:58,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:46:58,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:46:58,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:46:58,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:46:58,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:46:58,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:46:58,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:46:58,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:46:58,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:46:58,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:46:58,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:46:58,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:46:58,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:46:58,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:46:58,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:46:58,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:46:58,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:46:58,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:46:58,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:46:58,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:46:58,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:46:58,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:46:58,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:46:58,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:46:58,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:46:58,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:46:58,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:46:58,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:46:58,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:46:58,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:46:58,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:46:58,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:46:58,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:46:58,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:46:58,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:46:58,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:46:58,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:46:58,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:46:58,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:46:58,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:46:58,462 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:46:58,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:46:58,463 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:46:58,463 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:46:58,464 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:46:58,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:46:58,465 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:46:58,465 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:46:58,466 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:46:58,466 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:46:58,466 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:46:58,466 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:46:58,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:46:58,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:46:58,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:46:58,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:46:58,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:46:58,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:46:58,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:46:58,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:46:58,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:46:58,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:46:58,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:46:58,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:46:58,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:46:58,471 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:46:58,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:46:58,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:46:58,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:46:58,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:46:58,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:46:58,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:46:58,473 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_0ecdbe11-1613-4884-b616-f4a2ef9e0934/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a [2022-11-03 02:46:58,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:46:58,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:46:58,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:46:58,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:46:58,850 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:46:58,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2022-11-03 02:46:58,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/data/02699c1c2/0f2e33592f734df4ba7ae61b0feb5f11/FLAGb0f10272f [2022-11-03 02:46:59,970 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:46:59,970 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2022-11-03 02:47:00,031 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/data/02699c1c2/0f2e33592f734df4ba7ae61b0feb5f11/FLAGb0f10272f [2022-11-03 02:47:00,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/data/02699c1c2/0f2e33592f734df4ba7ae61b0feb5f11 [2022-11-03 02:47:00,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:47:00,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:47:00,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:47:00,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:47:00,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:47:00,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:47:00" (1/1) ... [2022-11-03 02:47:00,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@951a3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:00, skipping insertion in model container [2022-11-03 02:47:00,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:47:00" (1/1) ... [2022-11-03 02:47:00,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:47:00,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:47:00,929 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_0ecdbe11-1613-4884-b616-f4a2ef9e0934/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2022-11-03 02:47:00,940 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_0ecdbe11-1613-4884-b616-f4a2ef9e0934/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2022-11-03 02:47:02,045 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,046 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,047 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,048 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,050 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,066 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,067 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,069 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,070 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:02,629 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:47:02,631 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:47:02,633 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:47:02,634 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:47:02,636 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:47:02,637 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:47:02,638 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:47:02,639 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:47:02,640 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:47:02,641 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:47:02,870 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:47:03,013 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,014 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:47:03,201 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:47:03,236 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_0ecdbe11-1613-4884-b616-f4a2ef9e0934/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2022-11-03 02:47:03,241 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_0ecdbe11-1613-4884-b616-f4a2ef9e0934/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2022-11-03 02:47:03,317 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,325 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,326 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,329 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,330 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,338 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,342 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,343 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,344 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,405 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:47:03,408 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:47:03,409 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:47:03,410 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:47:03,412 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:47:03,414 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:47:03,415 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:47:03,416 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:47:03,417 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:47:03,417 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:47:03,459 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:47:03,577 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,577 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:47:03,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:47:04,037 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:47:04,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04 WrapperNode [2022-11-03 02:47:04,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:47:04,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:47:04,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:47:04,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:47:04,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,256 INFO L138 Inliner]: procedures = 693, calls = 2789, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 869 [2022-11-03 02:47:04,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:47:04,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:47:04,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:47:04,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:47:04,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:47:04,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:47:04,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:47:04,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:47:04,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (1/1) ... [2022-11-03 02:47:04,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:47:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:04,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:47:04,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:47:04,471 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-11-03 02:47:04,472 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-11-03 02:47:04,473 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-03 02:47:04,474 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-03 02:47:04,474 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-11-03 02:47:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-11-03 02:47:04,476 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:47:04,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:47:04,476 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-03 02:47:04,476 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-03 02:47:04,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:47:04,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:47:04,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:47:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:47:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:47:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:47:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:47:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:47:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-03 02:47:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-03 02:47:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:47:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:47:04,481 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:47:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:47:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:47:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2022-11-03 02:47:04,482 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2022-11-03 02:47:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:47:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-03 02:47:04,483 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-03 02:47:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 02:47:04,483 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 02:47:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:47:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:47:04,838 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:47:04,840 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:47:06,301 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:47:06,561 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:47:06,561 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:47:06,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:47:06 BoogieIcfgContainer [2022-11-03 02:47:06,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:47:06,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:47:06,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:47:06,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:47:06,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:47:00" (1/3) ... [2022-11-03 02:47:06,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ceeaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:47:06, skipping insertion in model container [2022-11-03 02:47:06,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:47:04" (2/3) ... [2022-11-03 02:47:06,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ceeaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:47:06, skipping insertion in model container [2022-11-03 02:47:06,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:47:06" (3/3) ... [2022-11-03 02:47:06,579 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_cursor_harness.i [2022-11-03 02:47:06,604 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:47:06,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:47:06,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:47:06,692 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;@5542b066, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:47:06,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:47:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-03 02:47:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:47:06,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:06,709 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:47:06,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1141148069, now seen corresponding path program 1 times [2022-11-03 02:47:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:06,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683313368] [2022-11-03 02:47:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:06,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:08,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:08,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683313368] [2022-11-03 02:47:08,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683313368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:08,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:47:08,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:47:08,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599015623] [2022-11-03 02:47:08,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:08,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:47:08,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:47:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:47:08,110 INFO L87 Difference]: Start difference. First operand has 92 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:47:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:08,389 INFO L93 Difference]: Finished difference Result 157 states and 217 transitions. [2022-11-03 02:47:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:47:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-11-03 02:47:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:08,402 INFO L225 Difference]: With dead ends: 157 [2022-11-03 02:47:08,402 INFO L226 Difference]: Without dead ends: 119 [2022-11-03 02:47:08,408 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 02:47:08,415 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 12 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:08,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 335 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:47:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-03 02:47:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-11-03 02:47:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 68 states have internal predecessors, (84), 39 states have call successors, (39), 10 states have call predecessors, (39), 10 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-03 02:47:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2022-11-03 02:47:08,479 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 42 [2022-11-03 02:47:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:08,480 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2022-11-03 02:47:08,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:47:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2022-11-03 02:47:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:47:08,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:08,484 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:47:08,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:47:08,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2093931912, now seen corresponding path program 1 times [2022-11-03 02:47:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062586288] [2022-11-03 02:47:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:08,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:47:15,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:15,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062586288] [2022-11-03 02:47:15,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062586288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133117519] [2022-11-03 02:47:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:15,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:15,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:15,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:15,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ecdbe11-1613-4884-b616-f4a2ef9e0934/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:47:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 2470 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 02:47:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:16,525 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 02:47:16,532 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 02:47:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:20,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:22,049 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2022-11-03 02:47:37,908 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.