./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX --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 1b920ac3045decc1a5a84e4c4a6d200f349784425219a23e0b9ddb547b7159b4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:49,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:49,847 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:48:49,855 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:49,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:49,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:49,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:49,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:49,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:49,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:49,905 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:49,905 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:49,906 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:49,908 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:49,908 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:49,909 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:49,909 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:49,910 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:49,910 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:49,911 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:49,911 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:49,912 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:49,913 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:49,913 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:48:49,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:49,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:49,915 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:48:49,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:49,916 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:48:49,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:48:49,917 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:49,918 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:49,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:49,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:49,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:49,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:49,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:48:49,920 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:49,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:49,920 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:48:49,920 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:49,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:49,921 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_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b920ac3045decc1a5a84e4c4a6d200f349784425219a23e0b9ddb547b7159b4 [2023-11-12 00:48:50,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:50,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:50,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:50,299 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:50,299 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:50,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i [2023-11-12 00:48:53,507 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:54,034 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:54,034 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i [2023-11-12 00:48:54,078 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/data/72b0f02ce/93b19e9dadfb4930a924ee17df128313/FLAG33886ac8a [2023-11-12 00:48:54,093 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/data/72b0f02ce/93b19e9dadfb4930a924ee17df128313 [2023-11-12 00:48:54,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:54,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:54,099 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:54,099 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:54,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:54,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:54" (1/1) ... [2023-11-12 00:48:54,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5cde28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:54, skipping insertion in model container [2023-11-12 00:48:54,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:54" (1/1) ... [2023-11-12 00:48:54,219 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:54,533 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_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i[4496,4509] [2023-11-12 00:48:54,543 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_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i[4556,4569] [2023-11-12 00:48:55,581 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:55,582 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:55,582 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:55,583 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:55,585 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:55,598 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:55,598 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:55,600 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:55,601 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,022 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:48:56,023 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:48:56,024 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:48:56,026 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:48:56,028 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:48:56,029 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:48:56,030 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:48:56,030 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:48:56,031 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:48:56,032 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:48:56,251 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,251 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:56,351 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:56,366 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_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i[4496,4509] [2023-11-12 00:48:56,367 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_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/sv-benchmarks/c/aws-c-common/aws_priority_queue_top_harness.i[4556,4569] [2023-11-12 00:48:56,441 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,441 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,442 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,442 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,443 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,468 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,469 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,470 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,471 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,542 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:48:56,556 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:48:56,558 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:48:56,559 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:48:56,563 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:48:56,564 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:48:56,565 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:48:56,565 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:48:56,566 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:48:56,567 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:48:56,642 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,647 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:48:56,657 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-12 00:48:56,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:57,061 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,061 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,062 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,062 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,062 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,062 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,063 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,063 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,064 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,064 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,064 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,064 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,065 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,065 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,065 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:48:57,073 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:57,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57 WrapperNode [2023-11-12 00:48:57,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:57,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:57,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:57,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:57,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,188 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,252 INFO L138 Inliner]: procedures = 688, calls = 1537, calls flagged for inlining = 55, calls inlined = 11, statements flattened = 718 [2023-11-12 00:48:57,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:57,253 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:57,253 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:57,253 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:57,263 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,271 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,324 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:57,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:57,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:57,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:57,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (1/1) ... [2023-11-12 00:48:57,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:57,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:57,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-12 00:48:57,464 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-12 00:48:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:48:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-12 00:48:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-12 00:48:57,465 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-12 00:48:57,466 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-12 00:48:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:48:57,466 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:48:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:48:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:48:57,466 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:48:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:48:57,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:48:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:48:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-11-12 00:48:57,467 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-11-12 00:48:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:48:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:57,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:48:57,468 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:48:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-12 00:48:57,468 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-12 00:48:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:48:57,468 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:48:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-12 00:48:57,469 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-12 00:48:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-12 00:48:57,469 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-12 00:48:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:48:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:48:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:48:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:48:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:48:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:48:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:48:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:48:57,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:48:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:48:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2023-11-12 00:48:57,472 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2023-11-12 00:48:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-12 00:48:57,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-12 00:48:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:57,868 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:57,872 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:59,253 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:59,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:59,565 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:48:59,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:59 BoogieIcfgContainer [2023-11-12 00:48:59,569 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:59,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:59,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:59,574 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:59,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:54" (1/3) ... [2023-11-12 00:48:59,576 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad132de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:59, skipping insertion in model container [2023-11-12 00:48:59,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:57" (2/3) ... [2023-11-12 00:48:59,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad132de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:59, skipping insertion in model container [2023-11-12 00:48:59,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:59" (3/3) ... [2023-11-12 00:48:59,579 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_top_harness.i [2023-11-12 00:48:59,598 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:59,598 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:48:59,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:59,679 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;@7ff556da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:59,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:48:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 88 states have internal predecessors, (106), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-12 00:48:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:48:59,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:59,703 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:59,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:59,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1228492728, now seen corresponding path program 1 times [2023-11-12 00:48:59,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:59,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642175460] [2023-11-12 00:48:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:59,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-12 00:49:00,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642175460] [2023-11-12 00:49:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642175460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:00,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:00,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:49:00,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898133499] [2023-11-12 00:49:00,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:00,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:49:00,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:49:01,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:01,019 INFO L87 Difference]: Start difference. First operand has 156 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 88 states have internal predecessors, (106), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:49:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:01,591 INFO L93 Difference]: Finished difference Result 282 states and 389 transitions. [2023-11-12 00:49:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:49:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 93 [2023-11-12 00:49:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:01,604 INFO L225 Difference]: With dead ends: 282 [2023-11-12 00:49:01,605 INFO L226 Difference]: Without dead ends: 154 [2023-11-12 00:49:01,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:01,613 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 31 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:01,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 634 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:49:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-12 00:49:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-11-12 00:49:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 87 states have internal predecessors, (101), 50 states have call successors, (50), 17 states have call predecessors, (50), 17 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-12 00:49:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 200 transitions. [2023-11-12 00:49:01,673 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 200 transitions. Word has length 93 [2023-11-12 00:49:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:01,675 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 200 transitions. [2023-11-12 00:49:01,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:49:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 200 transitions. [2023-11-12 00:49:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-12 00:49:01,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:01,680 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:01,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:49:01,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:01,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash 498819034, now seen corresponding path program 1 times [2023-11-12 00:49:01,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:01,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147097504] [2023-11-12 00:49:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:01,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-12 00:49:02,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:02,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147097504] [2023-11-12 00:49:02,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147097504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:02,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087754053] [2023-11-12 00:49:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:02,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:02,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:02,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:02,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:49:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:03,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 2372 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:49:03,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-12 00:49:03,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:03,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087754053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:03,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:03,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-12 00:49:03,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651045327] [2023-11-12 00:49:03,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:03,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:49:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:03,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:49:03,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:49:03,390 INFO L87 Difference]: Start difference. First operand 154 states and 200 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-12 00:49:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:04,458 INFO L93 Difference]: Finished difference Result 289 states and 384 transitions. [2023-11-12 00:49:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:49:04,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 101 [2023-11-12 00:49:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:04,469 INFO L225 Difference]: With dead ends: 289 [2023-11-12 00:49:04,469 INFO L226 Difference]: Without dead ends: 156 [2023-11-12 00:49:04,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:49:04,476 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 48 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:04,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 917 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:49:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-12 00:49:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-11-12 00:49:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 89 states have internal predecessors, (102), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2023-11-12 00:49:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 207 transitions. [2023-11-12 00:49:04,526 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 207 transitions. Word has length 101 [2023-11-12 00:49:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:04,528 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 207 transitions. [2023-11-12 00:49:04,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-12 00:49:04,530 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 207 transitions. [2023-11-12 00:49:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:49:04,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:04,539 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:04,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:04,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:04,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:04,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash -352569357, now seen corresponding path program 1 times [2023-11-12 00:49:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345678229] [2023-11-12 00:49:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:04,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:49:04,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737446668] [2023-11-12 00:49:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:04,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:04,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:04,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:04,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:49:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:05,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:49:05,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-12 00:49:05,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:05,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:05,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345678229] [2023-11-12 00:49:05,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:49:05,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737446668] [2023-11-12 00:49:05,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737446668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:05,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:05,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:49:05,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764392900] [2023-11-12 00:49:05,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:05,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:49:05,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:49:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:05,646 INFO L87 Difference]: Start difference. First operand 156 states and 207 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-12 00:49:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:06,169 INFO L93 Difference]: Finished difference Result 283 states and 377 transitions. [2023-11-12 00:49:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:49:06,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 110 [2023-11-12 00:49:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:06,172 INFO L225 Difference]: With dead ends: 283 [2023-11-12 00:49:06,172 INFO L226 Difference]: Without dead ends: 156 [2023-11-12 00:49:06,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:49:06,174 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 37 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:06,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 784 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:49:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-12 00:49:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-11-12 00:49:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.160919540229885) internal successors, (101), 89 states have internal predecessors, (101), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (55), 49 states have call predecessors, (55), 49 states have call successors, (55) [2023-11-12 00:49:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 206 transitions. [2023-11-12 00:49:06,211 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 206 transitions. Word has length 110 [2023-11-12 00:49:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:06,212 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 206 transitions. [2023-11-12 00:49:06,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-12 00:49:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 206 transitions. [2023-11-12 00:49:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-12 00:49:06,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:06,220 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-11-12 00:49:06,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:06,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:06,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:06,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1197749905, now seen corresponding path program 1 times [2023-11-12 00:49:06,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:06,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209365696] [2023-11-12 00:49:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:06,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:06,547 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:49:06,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830032661] [2023-11-12 00:49:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:06,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:06,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:06,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:06,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:49:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:07,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:49:07,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 00:49:07,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:07,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:07,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209365696] [2023-11-12 00:49:07,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:49:07,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830032661] [2023-11-12 00:49:07,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830032661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:07,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:07,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:49:07,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795605312] [2023-11-12 00:49:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:07,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:49:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:49:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:49:07,351 INFO L87 Difference]: Start difference. First operand 156 states and 206 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-12 00:49:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:07,984 INFO L93 Difference]: Finished difference Result 288 states and 382 transitions. [2023-11-12 00:49:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:49:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 118 [2023-11-12 00:49:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:07,988 INFO L225 Difference]: With dead ends: 288 [2023-11-12 00:49:07,988 INFO L226 Difference]: Without dead ends: 156 [2023-11-12 00:49:07,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:49:07,990 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 51 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:07,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1051 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:49:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-12 00:49:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-11-12 00:49:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.160919540229885) internal successors, (101), 89 states have internal predecessors, (101), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (54), 49 states have call predecessors, (54), 49 states have call successors, (54) [2023-11-12 00:49:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 205 transitions. [2023-11-12 00:49:08,006 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 205 transitions. Word has length 118 [2023-11-12 00:49:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:08,007 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 205 transitions. [2023-11-12 00:49:08,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 5 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-12 00:49:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 205 transitions. [2023-11-12 00:49:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-12 00:49:08,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:08,009 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:08,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:08,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:08,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:08,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:08,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2079056202, now seen corresponding path program 2 times [2023-11-12 00:49:08,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:08,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062496078] [2023-11-12 00:49:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:08,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:08,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:49:08,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077497787] [2023-11-12 00:49:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:49:08,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:08,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:08,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:08,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:49:09,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:49:09,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:49:09,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:49:09,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-12 00:49:09,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:09,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:09,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062496078] [2023-11-12 00:49:09,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:49:09,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077497787] [2023-11-12 00:49:09,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077497787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:09,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:09,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:49:09,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410602202] [2023-11-12 00:49:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:09,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:49:09,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:49:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:09,309 INFO L87 Difference]: Start difference. First operand 156 states and 205 transitions. Second operand has 5 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:49:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:09,759 INFO L93 Difference]: Finished difference Result 262 states and 348 transitions. [2023-11-12 00:49:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:49:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 127 [2023-11-12 00:49:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:09,762 INFO L225 Difference]: With dead ends: 262 [2023-11-12 00:49:09,762 INFO L226 Difference]: Without dead ends: 156 [2023-11-12 00:49:09,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:09,764 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 0 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:09,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 673 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:49:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-12 00:49:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-11-12 00:49:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.160919540229885) internal successors, (101), 89 states have internal predecessors, (101), 50 states have call successors, (50), 17 states have call predecessors, (50), 18 states have return successors, (53), 49 states have call predecessors, (53), 49 states have call successors, (53) [2023-11-12 00:49:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2023-11-12 00:49:09,778 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 127 [2023-11-12 00:49:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:09,779 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2023-11-12 00:49:09,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:49:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2023-11-12 00:49:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 00:49:09,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:09,782 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:09,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:09,993 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:09,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:09,996 INFO L85 PathProgramCache]: Analyzing trace with hash -346090507, now seen corresponding path program 3 times [2023-11-12 00:49:09,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:09,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786357543] [2023-11-12 00:49:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:09,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:10,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:49:10,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20913013] [2023-11-12 00:49:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:49:10,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:10,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:10,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:10,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:49:10,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:49:10,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:49:10,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 2822 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:49:10,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-12 00:49:10,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:10,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:10,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786357543] [2023-11-12 00:49:10,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:49:10,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20913013] [2023-11-12 00:49:10,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20913013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:10,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:10,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:49:10,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450873799] [2023-11-12 00:49:10,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:10,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:49:10,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:49:10,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:49:10,988 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:49:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:11,756 INFO L93 Difference]: Finished difference Result 271 states and 358 transitions. [2023-11-12 00:49:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:49:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 136 [2023-11-12 00:49:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:11,762 INFO L225 Difference]: With dead ends: 271 [2023-11-12 00:49:11,762 INFO L226 Difference]: Without dead ends: 166 [2023-11-12 00:49:11,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:49:11,764 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 37 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:11,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1068 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:49:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-12 00:49:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2023-11-12 00:49:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 55 states have call successors, (55), 18 states have call predecessors, (55), 19 states have return successors, (58), 54 states have call predecessors, (58), 54 states have call successors, (58) [2023-11-12 00:49:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2023-11-12 00:49:11,822 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 136 [2023-11-12 00:49:11,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:11,826 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2023-11-12 00:49:11,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:49:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2023-11-12 00:49:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:49:11,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:11,829 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:11,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:12,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:49:12,040 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:12,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:12,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1008200430, now seen corresponding path program 1 times [2023-11-12 00:49:12,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:12,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877241230] [2023-11-12 00:49:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:12,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:12,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:49:12,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220992041] [2023-11-12 00:49:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:12,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:12,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:12,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:12,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a2fbbc0-d9f3-4bae-bc8c-567bf86d2f4c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:49:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:13,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 2954 conjuncts, 164 conjunts are in the unsatisfiable core [2023-11-12 00:49:13,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:13,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:49:14,054 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:49:14,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 29 [2023-11-12 00:49:16,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-12 00:49:24,011 INFO L322 Elim1Store]: treesize reduction 71, result has 15.5 percent of original size [2023-11-12 00:49:24,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 82 [2023-11-12 00:49:24,088 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-12 00:49:24,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2023-11-12 00:49:47,179 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-12 00:49:47,179 INFO L351 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 33 treesize of output 13 [2023-11-12 00:49:47,193 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-12 00:49:47,194 INFO L351 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 40 treesize of output 20 [2023-11-12 00:49:47,201 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-12 00:49:47,202 INFO L351 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 36 treesize of output 16 [2023-11-12 00:49:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 00:49:47,506 INFO L327 TraceCheckSpWp]: Computing backward predicates...