./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 0e0057cc 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_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/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_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh --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 0.2.4-dev-0e0057c [2023-12-02 17:35:37,662 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:35:37,727 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:35:37,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:35:37,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:35:37,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:35:37,756 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:35:37,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:35:37,757 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:35:37,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:35:37,758 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:35:37,759 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:35:37,759 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:35:37,760 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:35:37,760 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:35:37,761 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:35:37,761 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:35:37,762 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:35:37,762 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:35:37,763 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:35:37,763 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:35:37,764 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:35:37,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:35:37,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:35:37,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:35:37,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:35:37,766 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:35:37,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:35:37,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:35:37,767 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:35:37,768 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:35:37,768 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:35:37,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:35:37,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:35:37,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:35:37,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:35:37,769 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:35:37,769 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:35:37,769 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:35:37,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:35:37,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:35:37,770 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:35:37,770 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:35:37,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:35:37,771 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_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a [2023-12-02 17:35:38,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:35:38,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:35:38,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:35:38,024 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:35:38,025 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:35:38,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2023-12-02 17:35:40,811 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:35:41,206 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:35:41,207 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2023-12-02 17:35:41,235 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/data/51f4a8d39/9c0657e976904171bd505abb1784818f/FLAG50c7f8538 [2023-12-02 17:35:41,250 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/data/51f4a8d39/9c0657e976904171bd505abb1784818f [2023-12-02 17:35:41,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:35:41,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:35:41,255 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:35:41,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:35:41,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:35:41,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:35:41" (1/1) ... [2023-12-02 17:35:41,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535c98dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:41, skipping insertion in model container [2023-12-02 17:35:41,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:35:41" (1/1) ... [2023-12-02 17:35:41,389 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:35:41,656 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_6dd4f71b-431a-4d06-866f-d1591b926818/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2023-12-02 17:35:41,664 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_6dd4f71b-431a-4d06-866f-d1591b926818/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2023-12-02 17:35:42,443 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,444 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,445 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,446 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,447 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,462 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,464 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,466 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,466 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:42,855 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 17:35:42,856 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 17:35:42,857 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 17:35:42,859 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 17:35:42,861 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 17:35:42,862 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 17:35:42,863 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 17:35:42,863 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 17:35:42,864 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 17:35:42,865 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 17:35:43,107 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,107 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:35:43,248 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:35:43,262 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_6dd4f71b-431a-4d06-866f-d1591b926818/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2023-12-02 17:35:43,263 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_6dd4f71b-431a-4d06-866f-d1591b926818/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2023-12-02 17:35:43,300 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,300 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,301 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,301 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,302 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,308 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,308 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,309 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,310 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,368 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 17:35:43,369 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 17:35:43,370 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 17:35:43,371 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 17:35:43,371 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 17:35:43,372 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 17:35:43,372 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 17:35:43,373 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 17:35:43,373 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 17:35:43,374 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 17:35:43,436 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8253] [2023-12-02 17:35:43,438 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:35:43,454 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8739-8750] [2023-12-02 17:35:43,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:35:43,745 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,745 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,745 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,745 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,745 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,746 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,746 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,746 WARN L675 CHandler]: The function s_global_handler is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,746 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,746 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,746 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,746 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,747 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,747 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,747 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,747 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,747 WARN L675 CHandler]: The function tl_thread_handler is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,747 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,747 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,747 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:35:43,755 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:35:43,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43 WrapperNode [2023-12-02 17:35:43,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:35:43,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:35:43,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:35:43,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:35:43,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,835 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,899 INFO L138 Inliner]: procedures = 692, calls = 2794, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 864 [2023-12-02 17:35:43,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:35:43,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:35:43,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:35:43,901 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:35:43,911 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,970 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,974 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:43,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:44,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:35:44,001 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:35:44,001 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:35:44,001 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:35:44,002 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (1/1) ... [2023-12-02 17:35:44,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:35:44,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:35:44,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:35:44,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:35:44,076 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-12-02 17:35:44,076 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-12-02 17:35:44,076 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2023-12-02 17:35:44,076 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2023-12-02 17:35:44,076 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-12-02 17:35:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-12-02 17:35:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-12-02 17:35:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:35:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 17:35:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 17:35:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:35:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:35:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:35:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 17:35:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:35:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 17:35:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:35:44,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:35:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 17:35:44,078 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 17:35:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 17:35:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:35:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:35:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:35:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 17:35:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2023-12-02 17:35:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2023-12-02 17:35:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 17:35:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 17:35:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 17:35:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 17:35:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 17:35:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:35:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:35:44,307 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:35:44,310 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:35:45,408 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:35:45,625 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:35:45,626 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:35:45,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:35:45 BoogieIcfgContainer [2023-12-02 17:35:45,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:35:45,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:35:45,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:35:45,634 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:35:45,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:35:41" (1/3) ... [2023-12-02 17:35:45,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd7a36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:35:45, skipping insertion in model container [2023-12-02 17:35:45,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:35:43" (2/3) ... [2023-12-02 17:35:45,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd7a36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:35:45, skipping insertion in model container [2023-12-02 17:35:45,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:35:45" (3/3) ... [2023-12-02 17:35:45,650 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_cursor_harness.i [2023-12-02 17:35:45,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:35:45,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:35:45,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:35:45,735 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;@40ed3150, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:35:45,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:35:45,741 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) [2023-12-02 17:35:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 17:35:45,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:35:45,753 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] [2023-12-02 17:35:45,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:35:45,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:35:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2028297240, now seen corresponding path program 1 times [2023-12-02 17:35:45,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:35:45,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722498445] [2023-12-02 17:35:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:35:45,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:35:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:35:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:35:46,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:35:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722498445] [2023-12-02 17:35:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722498445] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:35:46,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:35:46,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:35:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327594336] [2023-12-02 17:35:46,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:35:46,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:35:46,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:35:46,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:35:46,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:35:46,700 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) [2023-12-02 17:35:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:35:46,863 INFO L93 Difference]: Finished difference Result 156 states and 217 transitions. [2023-12-02 17:35:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:35:46,866 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 [2023-12-02 17:35:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:35:46,874 INFO L225 Difference]: With dead ends: 156 [2023-12-02 17:35:46,874 INFO L226 Difference]: Without dead ends: 119 [2023-12-02 17:35:46,877 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 [2023-12-02 17:35:46,881 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 11 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:35:46,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 312 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:35:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-02 17:35:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-12-02 17:35:46,928 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) [2023-12-02 17:35:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2023-12-02 17:35:46,933 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 42 [2023-12-02 17:35:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:35:46,933 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2023-12-02 17:35:46,934 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) [2023-12-02 17:35:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2023-12-02 17:35:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 17:35:46,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:35:46,937 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] [2023-12-02 17:35:46,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:35:46,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:35:46,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:35:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash -968409925, now seen corresponding path program 1 times [2023-12-02 17:35:46,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:35:46,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982817418] [2023-12-02 17:35:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:35:46,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:35:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:35:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:35:53,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:35:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982817418] [2023-12-02 17:35:53,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982817418] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:35:53,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132039359] [2023-12-02 17:35:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:35:53,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:35:53,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:35:53,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:35:53,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd4f71b-431a-4d06-866f-d1591b926818/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:35:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:35:54,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 17:35:54,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:35:58,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:35:58,071 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 [2023-12-02 17:35:58,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:35:58,082 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 [2023-12-02 17:35:58,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:35:58,094 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 [2023-12-02 17:35:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:35:58,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:35:58,977 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 11492 disjunctions. This might take some time... [2023-12-02 17:36:06,423 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 10816 disjunctions.