./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 30e01a73 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_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/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_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:13:14,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:13:15,008 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:13:15,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:13:15,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:13:15,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:13:15,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:13:15,076 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:13:15,077 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:13:15,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:13:15,084 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:13:15,085 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:13:15,085 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:13:15,087 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:13:15,088 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:13:15,088 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:13:15,089 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:13:15,090 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:13:15,090 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:13:15,091 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:13:15,093 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:13:15,094 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:13:15,095 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:13:15,096 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:13:15,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:13:15,097 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:13:15,098 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:13:15,098 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:13:15,099 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:13:15,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:13:15,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:13:15,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:13:15,102 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:13:15,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:13:15,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:15,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:13:15,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:13:15,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:13:15,104 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:13:15,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:13:15,104 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:13:15,105 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:13:15,105 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:13:15,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:13:15,106 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a [2023-11-23 21:13:15,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:13:15,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:13:15,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:13:15,538 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:13:15,539 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:13:15,541 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2023-11-23 21:13:19,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:13:19,914 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:13:19,915 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2023-11-23 21:13:19,969 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/data/c23367b09/63e9cf46699c448690e5248b6bf16316/FLAGe429b4539 [2023-11-23 21:13:19,986 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/data/c23367b09/63e9cf46699c448690e5248b6bf16316 [2023-11-23 21:13:19,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:13:19,991 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:13:19,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:19,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:13:20,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:13:20,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:19" (1/1) ... [2023-11-23 21:13:20,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36eb51df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:20, skipping insertion in model container [2023-11-23 21:13:20,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:19" (1/1) ... [2023-11-23 21:13:20,163 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:13:20,498 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2023-11-23 21:13:20,508 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2023-11-23 21:13:21,925 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:21,926 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:21,929 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:21,931 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:21,933 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:21,970 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:21,979 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:21,985 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:21,986 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:22,587 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:13:22,589 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:13:22,591 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:13:22,595 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:13:22,603 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:13:22,604 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:13:22,605 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:13:22,607 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:13:22,608 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:13:22,609 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:13:23,084 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,086 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:23,290 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:13:23,307 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2023-11-23 21:13:23,308 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2023-11-23 21:13:23,393 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,394 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,394 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,395 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,396 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,402 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,403 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,404 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,404 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,444 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:13:23,445 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:13:23,446 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:13:23,447 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:13:23,449 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:13:23,449 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:13:23,450 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:13:23,451 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:13:23,451 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:13:23,452 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:13:23,555 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8253] [2023-11-23 21:13:23,558 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,558 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:13:23,585 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8739-8750] [2023-11-23 21:13:23,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:24,082 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,082 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,083 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,083 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,083 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,084 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,084 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,084 WARN L675 CHandler]: The function s_global_handler is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,085 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,085 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,085 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,085 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,085 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,085 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,085 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,085 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,086 WARN L675 CHandler]: The function tl_thread_handler is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,086 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,086 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,086 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:13:24,095 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:13:24,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24 WrapperNode [2023-11-23 21:13:24,096 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:24,098 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:24,098 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:13:24,098 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:13:24,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,416 INFO L138 Inliner]: procedures = 692, calls = 2794, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 864 [2023-11-23 21:13:24,421 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:24,422 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:13:24,422 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:13:24,422 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:13:24,434 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,444 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,496 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,500 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,509 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,516 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,529 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:13:24,530 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:13:24,530 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:13:24,530 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:13:24,531 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (1/1) ... [2023-11-23 21:13:24,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:24,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:13:24,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:13:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-23 21:13:24,638 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-23 21:13:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2023-11-23 21:13:24,639 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2023-11-23 21:13:24,639 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-11-23 21:13:24,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-11-23 21:13:24,639 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 21:13:24,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:13:24,640 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 21:13:24,640 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 21:13:24,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:13:24,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:13:24,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:13:24,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:13:24,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:13:24,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:13:24,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:13:24,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:13:24,642 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:13:24,642 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:13:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:13:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:13:24,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:13:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:13:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:13:24,645 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2023-11-23 21:13:24,645 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2023-11-23 21:13:24,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:13:24,647 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 21:13:24,647 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 21:13:24,647 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:13:24,647 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:13:24,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:13:24,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:13:25,113 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:13:25,115 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:13:26,619 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:26,998 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:26,998 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:13:27,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:27 BoogieIcfgContainer [2023-11-23 21:13:27,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:27,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:27,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:27,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:27,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:13:19" (1/3) ... [2023-11-23 21:13:27,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7fd819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:27, skipping insertion in model container [2023-11-23 21:13:27,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:24" (2/3) ... [2023-11-23 21:13:27,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7fd819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:27, skipping insertion in model container [2023-11-23 21:13:27,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:27" (3/3) ... [2023-11-23 21:13:27,021 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_cursor_harness.i [2023-11-23 21:13:27,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:27,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:13:27,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:27,136 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d68a1b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:27,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:13:27,143 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) [2023-11-23 21:13:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:13:27,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:27,158 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] [2023-11-23 21:13:27,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:27,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:27,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2028297240, now seen corresponding path program 1 times [2023-11-23 21:13:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:27,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403844688] [2023-11-23 21:13:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:27,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:13:28,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:28,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403844688] [2023-11-23 21:13:28,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403844688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:28,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:28,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:13:28,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330225399] [2023-11-23 21:13:28,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:28,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:28,825 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) [2023-11-23 21:13:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:29,129 INFO L93 Difference]: Finished difference Result 156 states and 217 transitions. [2023-11-23 21:13:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:29,133 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 [2023-11-23 21:13:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:29,146 INFO L225 Difference]: With dead ends: 156 [2023-11-23 21:13:29,146 INFO L226 Difference]: Without dead ends: 119 [2023-11-23 21:13:29,151 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 [2023-11-23 21:13:29,155 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 11 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:29,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 312 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:13:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-23 21:13:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-11-23 21:13:29,226 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) [2023-11-23 21:13:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2023-11-23 21:13:29,233 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 42 [2023-11-23 21:13:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:29,235 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2023-11-23 21:13:29,235 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) [2023-11-23 21:13:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2023-11-23 21:13:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:13:29,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:29,243 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] [2023-11-23 21:13:29,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:13:29,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:29,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -968409925, now seen corresponding path program 1 times [2023-11-23 21:13:29,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:29,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130919465] [2023-11-23 21:13:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:13:38,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130919465] [2023-11-23 21:13:38,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130919465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:38,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397543703] [2023-11-23 21:13:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:38,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:38,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:38,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:38,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0892e22-c288-45dc-87a4-3a6686b45257/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:13:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:38,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-23 21:13:38,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:44,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:13:44,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 122 [2023-11-23 21:13:44,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:13:44,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 106 [2023-11-23 21:13:44,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:13:44,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 90 [2023-11-23 21:13:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:13:44,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:46,039 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 10832 disjunctions. This might take some time... [2023-11-23 21:13:57,071 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 10816 disjunctions.