./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4074842a6d6900f214884b5b0ef94aa1b36f37c81b70cefd0198f88d1e717beb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:34,184 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:34,310 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:08:34,317 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:34,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:34,346 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:34,347 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:34,348 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:34,349 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:34,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:34,354 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:34,355 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:34,355 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:34,357 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:34,358 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:34,359 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:34,359 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:34,360 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:34,360 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:34,361 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:34,361 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:34,362 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:34,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:34,364 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:08:34,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:34,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:34,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:08:34,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:34,366 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:08:34,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:08:34,368 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:34,368 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:34,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:34,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:34,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:34,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:34,370 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:34,370 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:08:34,370 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:34,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:34,371 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:34,371 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:08:34,371 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:34,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:34,372 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_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4074842a6d6900f214884b5b0ef94aa1b36f37c81b70cefd0198f88d1e717beb [2023-11-23 21:08:34,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:34,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:34,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:34,670 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:34,673 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:34,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i [2023-11-23 21:08:37,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:38,283 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:38,283 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i [2023-11-23 21:08:38,325 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/data/11a5e66ed/4787115451ce4a1fb2988044f4b4032e/FLAG3324b622a [2023-11-23 21:08:38,344 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/data/11a5e66ed/4787115451ce4a1fb2988044f4b4032e [2023-11-23 21:08:38,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:38,352 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:38,356 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:38,356 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:38,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:38,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:38" (1/1) ... [2023-11-23 21:08:38,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed79fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:38, skipping insertion in model container [2023-11-23 21:08:38,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:38" (1/1) ... [2023-11-23 21:08:38,515 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:38,849 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_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i[4495,4508] [2023-11-23 21:08:38,856 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_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i[4555,4568] [2023-11-23 21:08:39,925 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,926 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,927 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,931 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,934 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,954 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,955 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,957 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,958 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,959 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,961 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,961 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:39,962 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,343 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:08:40,345 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:08:40,346 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:08:40,347 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:08:40,349 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:08:40,349 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:08:40,350 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:08:40,351 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:08:40,351 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:08:40,352 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:08:40,536 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,553 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,643 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,644 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:40,699 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:40,711 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_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i[4495,4508] [2023-11-23 21:08:40,711 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_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/sv-benchmarks/c/aws-c-common/aws_array_list_get_at_harness.i[4555,4568] [2023-11-23 21:08:40,764 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,765 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,765 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,766 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,767 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,774 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,775 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,776 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,777 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,778 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,779 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,779 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,780 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,858 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:08:40,858 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:08:40,859 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:08:40,860 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:08:40,860 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:08:40,861 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:08:40,862 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:08:40,862 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:08:40,863 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:08:40,863 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:08:40,921 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,928 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,940 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7769-7780] [2023-11-23 21:08:40,973 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,974 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:40,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:41,289 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,290 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,292 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,292 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,292 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,293 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,293 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,293 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,293 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,293 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,293 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,294 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,294 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,295 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,295 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:41,303 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:41,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41 WrapperNode [2023-11-23 21:08:41,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:41,306 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:41,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:41,307 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:41,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,439 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,506 INFO L138 Inliner]: procedures = 690, calls = 1683, calls flagged for inlining = 53, calls inlined = 9, statements flattened = 657 [2023-11-23 21:08:41,507 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:41,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:41,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:41,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:41,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,564 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,575 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:41,593 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:41,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:41,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:41,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:41,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:41,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:08:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-23 21:08:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-23 21:08:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 21:08:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 21:08:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 21:08:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 21:08:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:08:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 21:08:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:08:41,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:08:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-23 21:08:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-23 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:08:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:08:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-23 21:08:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-23 21:08:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 21:08:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 21:08:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-23 21:08:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-23 21:08:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-23 21:08:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-23 21:08:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:08:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:08:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-23 21:08:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-23 21:08:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:08:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:08:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:08:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 21:08:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 21:08:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 21:08:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 21:08:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:08:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-23 21:08:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-23 21:08:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:08:42,028 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:42,031 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:43,077 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:43,246 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:43,246 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:08:43,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:43 BoogieIcfgContainer [2023-11-23 21:08:43,248 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:43,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:43,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:43,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:43,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:38" (1/3) ... [2023-11-23 21:08:43,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a833217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:43, skipping insertion in model container [2023-11-23 21:08:43,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41" (2/3) ... [2023-11-23 21:08:43,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a833217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:43, skipping insertion in model container [2023-11-23 21:08:43,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:43" (3/3) ... [2023-11-23 21:08:43,258 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_get_at_harness.i [2023-11-23 21:08:43,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:43,278 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:08:43,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:43,340 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;@3901d9a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:43,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:08:43,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 78 states have internal predecessors, (91), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-23 21:08:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 21:08:43,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:43,361 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:43,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:43,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:43,367 INFO L85 PathProgramCache]: Analyzing trace with hash 348985392, now seen corresponding path program 1 times [2023-11-23 21:08:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:43,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981744307] [2023-11-23 21:08:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:43,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-23 21:08:44,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981744307] [2023-11-23 21:08:44,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981744307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611744603] [2023-11-23 21:08:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:44,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:44,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:44,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:44,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:08:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:45,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 2209 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:08:45,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-23 21:08:45,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:45,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611744603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:45,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:08:45,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 21:08:45,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288652988] [2023-11-23 21:08:45,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:45,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:45,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:45,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:45,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:08:45,515 INFO L87 Difference]: Start difference. First operand has 147 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 78 states have internal predecessors, (91), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-23 21:08:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:46,037 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2023-11-23 21:08:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:46,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 95 [2023-11-23 21:08:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:46,051 INFO L225 Difference]: With dead ends: 271 [2023-11-23 21:08:46,051 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 21:08:46,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:08:46,060 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 38 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:46,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 557 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:08:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 21:08:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-23 21:08:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 74 states have (on average 1.135135135135135) internal successors, (84), 76 states have internal predecessors, (84), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (55), 50 states have call predecessors, (55), 50 states have call successors, (55) [2023-11-23 21:08:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 191 transitions. [2023-11-23 21:08:46,123 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 191 transitions. Word has length 95 [2023-11-23 21:08:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:46,123 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 191 transitions. [2023-11-23 21:08:46,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-23 21:08:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 191 transitions. [2023-11-23 21:08:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 21:08:46,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:46,130 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 3, 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] [2023-11-23 21:08:46,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:46,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:08:46,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:46,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:46,351 INFO L85 PathProgramCache]: Analyzing trace with hash -963362522, now seen corresponding path program 1 times [2023-11-23 21:08:46,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:46,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209015960] [2023-11-23 21:08:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:46,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:46,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:08:46,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305746734] [2023-11-23 21:08:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:46,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:46,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:46,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:46,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:08:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:47,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:08:47,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-23 21:08:47,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:47,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:47,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209015960] [2023-11-23 21:08:47,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:08:47,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305746734] [2023-11-23 21:08:47,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305746734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:47,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:47,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:08:47,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751345814] [2023-11-23 21:08:47,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:47,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:08:47,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:47,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:08:47,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:08:47,177 INFO L87 Difference]: Start difference. First operand 143 states and 191 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 21:08:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:47,766 INFO L93 Difference]: Finished difference Result 232 states and 309 transitions. [2023-11-23 21:08:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:08:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 113 [2023-11-23 21:08:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:47,771 INFO L225 Difference]: With dead ends: 232 [2023-11-23 21:08:47,771 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 21:08:47,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:08:47,777 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 37 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:47,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 660 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:08:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 21:08:47,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-23 21:08:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 74 states have (on average 1.135135135135135) internal successors, (84), 76 states have internal predecessors, (84), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (52), 50 states have call predecessors, (52), 50 states have call successors, (52) [2023-11-23 21:08:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 188 transitions. [2023-11-23 21:08:47,812 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 188 transitions. Word has length 113 [2023-11-23 21:08:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:47,815 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 188 transitions. [2023-11-23 21:08:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 21:08:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 188 transitions. [2023-11-23 21:08:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-23 21:08:47,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:47,826 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:47,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:48,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:48,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1453026869, now seen corresponding path program 2 times [2023-11-23 21:08:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:48,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738946041] [2023-11-23 21:08:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:48,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:48,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:08:48,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699777366] [2023-11-23 21:08:48,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:08:48,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:48,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:48,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:48,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:08:48,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:08:48,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:08:48,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:08:48,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-23 21:08:48,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:48,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:48,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738946041] [2023-11-23 21:08:48,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:08:48,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699777366] [2023-11-23 21:08:48,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699777366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:48,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:48,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:08:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487796410] [2023-11-23 21:08:48,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:48,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:48,877 INFO L87 Difference]: Start difference. First operand 143 states and 188 transitions. Second operand has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-23 21:08:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:49,383 INFO L93 Difference]: Finished difference Result 223 states and 290 transitions. [2023-11-23 21:08:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:49,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 122 [2023-11-23 21:08:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:49,387 INFO L225 Difference]: With dead ends: 223 [2023-11-23 21:08:49,387 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 21:08:49,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:49,389 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:49,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 583 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:08:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 21:08:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-23 21:08:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 74 states have (on average 1.135135135135135) internal successors, (84), 76 states have internal predecessors, (84), 52 states have call successors, (52), 16 states have call predecessors, (52), 16 states have return successors, (51), 50 states have call predecessors, (51), 50 states have call successors, (51) [2023-11-23 21:08:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2023-11-23 21:08:49,407 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 122 [2023-11-23 21:08:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:49,408 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2023-11-23 21:08:49,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-23 21:08:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2023-11-23 21:08:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-23 21:08:49,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:49,411 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:49,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:49,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 21:08:49,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:49,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1866569766, now seen corresponding path program 3 times [2023-11-23 21:08:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:49,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987799474] [2023-11-23 21:08:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:49,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:49,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:08:49,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442082716] [2023-11-23 21:08:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:08:49,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:49,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:49,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:49,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:08:50,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:08:50,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:08:50,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:08:50,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-23 21:08:50,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:50,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:50,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987799474] [2023-11-23 21:08:50,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:08:50,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442082716] [2023-11-23 21:08:50,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442082716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:50,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:50,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:08:50,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296650258] [2023-11-23 21:08:50,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:50,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:08:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:50,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:08:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:08:50,565 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 21:08:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:51,232 INFO L93 Difference]: Finished difference Result 220 states and 283 transitions. [2023-11-23 21:08:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:08:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 131 [2023-11-23 21:08:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:51,238 INFO L225 Difference]: With dead ends: 220 [2023-11-23 21:08:51,238 INFO L226 Difference]: Without dead ends: 141 [2023-11-23 21:08:51,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:08:51,240 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 40 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:51,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 935 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:08:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-23 21:08:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-11-23 21:08:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 74 states have internal predecessors, (82), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-23 21:08:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2023-11-23 21:08:51,267 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 131 [2023-11-23 21:08:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:51,270 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2023-11-23 21:08:51,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 21:08:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2023-11-23 21:08:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-23 21:08:51,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:51,276 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:51,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:51,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:51,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:51,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:51,490 INFO L85 PathProgramCache]: Analyzing trace with hash -87301905, now seen corresponding path program 1 times [2023-11-23 21:08:51,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:51,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952058823] [2023-11-23 21:08:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:51,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:51,610 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:08:51,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011555435] [2023-11-23 21:08:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:51,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:51,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:51,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:51,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:08:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:52,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 2869 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 21:08:52,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-11-23 21:08:52,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:52,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:52,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952058823] [2023-11-23 21:08:52,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:08:52,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011555435] [2023-11-23 21:08:52,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011555435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:52,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:52,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:08:52,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615967146] [2023-11-23 21:08:52,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:52,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:08:52,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:52,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:08:52,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:08:52,542 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand has 9 states, 6 states have (on average 7.833333333333333) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2023-11-23 21:08:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:53,599 INFO L93 Difference]: Finished difference Result 241 states and 315 transitions. [2023-11-23 21:08:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:08:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 7.833333333333333) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2023-11-23 21:08:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:53,602 INFO L225 Difference]: With dead ends: 241 [2023-11-23 21:08:53,603 INFO L226 Difference]: Without dead ends: 141 [2023-11-23 21:08:53,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:08:53,605 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 5 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:53,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1156 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:08:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-23 21:08:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-11-23 21:08:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 74 states have internal predecessors, (81), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-23 21:08:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 183 transitions. [2023-11-23 21:08:53,621 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 183 transitions. Word has length 140 [2023-11-23 21:08:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:53,622 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 183 transitions. [2023-11-23 21:08:53,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 7.833333333333333) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2023-11-23 21:08:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 183 transitions. [2023-11-23 21:08:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-23 21:08:53,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:53,625 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:53,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:53,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:53,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:53,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash 988377100, now seen corresponding path program 1 times [2023-11-23 21:08:53,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913622384] [2023-11-23 21:08:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:53,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:08:53,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948626041] [2023-11-23 21:08:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:53,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:53,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:53,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:53,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a5a40c0-28ad-49bc-935e-7a6ee7761e13/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:09:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:15,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 426 conjunts are in the unsatisfiable core [2023-11-23 21:09:15,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:15,563 INFO L378 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 [2023-11-23 21:09:16,343 INFO L378 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 [2023-11-23 21:09:19,079 INFO L349 Elim1Store]: treesize reduction 62, result has 18.4 percent of original size [2023-11-23 21:09:19,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 27 [2023-11-23 21:09:19,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-23 21:09:32,006 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:09:32,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 7