./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/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_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba --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-b5237d8 [2022-11-22 02:11:57,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:11:57,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:11:57,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:11:57,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:11:57,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:11:57,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:11:57,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:11:57,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:11:57,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:11:57,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:11:57,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:11:57,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:11:57,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:11:57,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:11:57,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:11:57,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:11:57,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:11:57,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:11:57,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:11:57,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:11:57,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:11:57,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:11:57,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:11:57,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:11:57,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:11:57,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:11:57,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:11:57,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:11:57,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:11:57,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:11:57,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:11:57,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:11:57,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:11:57,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:11:57,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:11:57,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:11:57,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:11:57,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:11:57,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:11:57,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:11:57,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 02:11:57,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:11:57,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:11:57,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:11:57,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:11:57,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:11:57,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:11:57,403 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:11:57,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:11:57,403 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:11:57,404 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:11:57,405 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:11:57,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:11:57,405 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:11:57,405 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:11:57,405 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:11:57,406 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:11:57,406 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:11:57,406 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:11:57,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:11:57,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:11:57,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:11:57,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:11:57,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:11:57,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:11:57,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:11:57,408 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:11:57,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:11:57,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:11:57,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:11:57,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:11:57,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:11:57,410 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:11:57,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:11:57,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:11:57,411 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:11:57,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:11:57,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:11:57,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:11:57,412 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_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a [2022-11-22 02:11:57,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:11:57,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:11:57,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:11:57,736 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:11:57,736 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:11:57,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2022-11-22 02:12:00,927 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:12:01,645 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:12:01,647 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2022-11-22 02:12:01,693 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/data/a17a36b92/d96981653fc2419da5a89c0a90dd5fca/FLAG6653f2ca4 [2022-11-22 02:12:01,718 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/data/a17a36b92/d96981653fc2419da5a89c0a90dd5fca [2022-11-22 02:12:01,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:12:01,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:12:01,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:12:01,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:12:01,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:12:01,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:12:01" (1/1) ... [2022-11-22 02:12:01,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474ff41c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:01, skipping insertion in model container [2022-11-22 02:12:01,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:12:01" (1/1) ... [2022-11-22 02:12:01,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:12:01,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:12:02,237 WARN L237 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_50277c90-dccc-4cac-999e-bbddda9bfeba/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2022-11-22 02:12:02,247 WARN L237 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_50277c90-dccc-4cac-999e-bbddda9bfeba/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2022-11-22 02:12:03,524 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:03,525 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:03,526 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:03,529 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:03,532 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:03,549 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:03,549 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:03,552 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:03,553 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,113 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 02:12:04,115 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 02:12:04,116 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 02:12:04,118 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 02:12:04,119 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 02:12:04,120 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 02:12:04,121 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 02:12:04,122 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 02:12:04,123 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 02:12:04,124 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 02:12:04,293 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 02:12:04,413 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,413 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:12:04,678 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:12:04,708 WARN L237 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_50277c90-dccc-4cac-999e-bbddda9bfeba/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2022-11-22 02:12:04,709 WARN L237 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_50277c90-dccc-4cac-999e-bbddda9bfeba/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2022-11-22 02:12:04,776 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,777 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,777 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,778 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,782 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,790 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,791 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,793 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,794 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,844 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 02:12:04,845 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 02:12:04,846 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 02:12:04,847 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 02:12:04,848 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 02:12:04,848 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 02:12:04,849 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 02:12:04,849 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 02:12:04,850 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 02:12:04,850 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 02:12:04,885 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 02:12:04,970 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:04,971 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 02:12:05,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:12:05,311 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:12:05,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05 WrapperNode [2022-11-22 02:12:05,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:12:05,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:12:05,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:12:05,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:12:05,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,540 INFO L138 Inliner]: procedures = 693, calls = 2788, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 863 [2022-11-22 02:12:05,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:12:05,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:12:05,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:12:05,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:12:05,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,655 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:12:05,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:12:05,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:12:05,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:12:05,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (1/1) ... [2022-11-22 02:12:05,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:12:05,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:05,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:12:05,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:12:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-11-22 02:12:05,766 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-11-22 02:12:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-22 02:12:05,767 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-22 02:12:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-11-22 02:12:05,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-11-22 02:12:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-22 02:12:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:12:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-22 02:12:05,769 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-22 02:12:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:12:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:12:05,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:12:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:12:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:12:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 02:12:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:12:05,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:12:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-22 02:12:05,773 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-22 02:12:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-22 02:12:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:12:05,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:12:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:12:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:12:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2022-11-22 02:12:05,774 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2022-11-22 02:12:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:12:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-22 02:12:05,775 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-22 02:12:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-22 02:12:05,775 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-22 02:12:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:12:05,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:12:06,134 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:12:06,189 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:12:07,720 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:12:08,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:12:08,041 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:12:08,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:12:08 BoogieIcfgContainer [2022-11-22 02:12:08,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:12:08,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:12:08,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:12:08,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:12:08,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:12:01" (1/3) ... [2022-11-22 02:12:08,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2115f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:12:08, skipping insertion in model container [2022-11-22 02:12:08,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:05" (2/3) ... [2022-11-22 02:12:08,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2115f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:12:08, skipping insertion in model container [2022-11-22 02:12:08,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:12:08" (3/3) ... [2022-11-22 02:12:08,062 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_cursor_harness.i [2022-11-22 02:12:08,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:12:08,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:12:08,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:12:08,158 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;@26763a53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:12:08,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:12:08,165 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) [2022-11-22 02:12:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:12:08,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:08,177 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] [2022-11-22 02:12:08,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2055834612, now seen corresponding path program 1 times [2022-11-22 02:12:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:08,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530412520] [2022-11-22 02:12:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:08,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:12:09,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:09,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530412520] [2022-11-22 02:12:09,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530412520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:09,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:12:09,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:12:09,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315917870] [2022-11-22 02:12:09,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:09,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:12:09,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:12:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:12:09,401 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) [2022-11-22 02:12:09,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:09,656 INFO L93 Difference]: Finished difference Result 157 states and 217 transitions. [2022-11-22 02:12:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:12:09,659 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 [2022-11-22 02:12:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:09,671 INFO L225 Difference]: With dead ends: 157 [2022-11-22 02:12:09,672 INFO L226 Difference]: Without dead ends: 119 [2022-11-22 02:12:09,676 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 [2022-11-22 02:12:09,690 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 12 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-22 02:12:09,691 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] [2022-11-22 02:12:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-22 02:12:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-11-22 02:12:09,761 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) [2022-11-22 02:12:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2022-11-22 02:12:09,773 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 42 [2022-11-22 02:12:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:09,774 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2022-11-22 02:12:09,774 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) [2022-11-22 02:12:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2022-11-22 02:12:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:12:09,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:09,778 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] [2022-11-22 02:12:09,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:12:09,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1179245369, now seen corresponding path program 1 times [2022-11-22 02:12:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:09,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747698103] [2022-11-22 02:12:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:09,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:12:16,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:16,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747698103] [2022-11-22 02:12:16,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747698103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:16,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623016135] [2022-11-22 02:12:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:16,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:16,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:16,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:16,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50277c90-dccc-4cac-999e-bbddda9bfeba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:12:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2465 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-22 02:12:17,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:17,722 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 02:12:17,728 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 02:12:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:12:21,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:12:23,216 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2022-11-22 02:12:36,470 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.