./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness_negated.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_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/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_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/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_85b05266-8cee-46fd-8614-3135426f6099/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 1aff94200ac4117962e76fd53c645cd9f09d34e83ee2d9eea604e31ed1e8a72c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:16:08,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:16:08,078 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:16:08,084 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:16:08,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:16:08,110 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:16:08,110 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:16:08,111 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:16:08,112 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:16:08,112 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:16:08,113 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:16:08,113 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:16:08,114 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:16:08,114 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:16:08,115 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:16:08,115 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:16:08,116 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:16:08,116 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:16:08,117 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:16:08,117 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:16:08,118 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:16:08,119 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:16:08,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:16:08,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:16:08,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:16:08,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:16:08,121 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:16:08,122 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:16:08,122 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:16:08,123 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:16:08,133 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:16:08,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:16:08,134 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:16:08,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:16:08,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:08,135 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:16:08,136 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:16:08,137 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:16:08,137 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:16:08,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:16:08,138 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:16:08,139 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:16:08,139 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:16:08,140 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:16:08,140 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_85b05266-8cee-46fd-8614-3135426f6099/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aff94200ac4117962e76fd53c645cd9f09d34e83ee2d9eea604e31ed1e8a72c [2023-11-23 21:16:08,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:16:08,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:16:08,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:16:08,456 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:16:08,457 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:16:08,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness_negated.i [2023-11-23 21:16:11,550 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:16:12,237 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:16:12,237 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness_negated.i [2023-11-23 21:16:12,283 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/data/54ae1b25a/ea3b643d92cd4810b66c8ad4a1de2945/FLAG8037f13a8 [2023-11-23 21:16:12,299 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/data/54ae1b25a/ea3b643d92cd4810b66c8ad4a1de2945 [2023-11-23 21:16:12,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:16:12,306 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:16:12,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:12,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:16:12,316 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:16:12,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:12" (1/1) ... [2023-11-23 21:16:12,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f23911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:12, skipping insertion in model container [2023-11-23 21:16:12,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:12" (1/1) ... [2023-11-23 21:16:12,459 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:16:12,730 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_85b05266-8cee-46fd-8614-3135426f6099/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness_negated.i[4493,4506] [2023-11-23 21:16:12,739 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_85b05266-8cee-46fd-8614-3135426f6099/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness_negated.i[4553,4566] [2023-11-23 21:16:14,114 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,116 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,117 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,120 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,123 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,164 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,170 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,173 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,177 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,180 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,189 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,190 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,190 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:14,813 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:16:14,815 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:16:14,816 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:16:14,817 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:16:14,819 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:16:14,820 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:16:14,820 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:16:14,821 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:16:14,822 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:16:14,823 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:16:15,395 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,397 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,429 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,431 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,438 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,458 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,459 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,460 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,461 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,461 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,462 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,462 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:15,565 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:16:15,589 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_85b05266-8cee-46fd-8614-3135426f6099/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness_negated.i[4493,4506] [2023-11-23 21:16:15,589 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_85b05266-8cee-46fd-8614-3135426f6099/sv-benchmarks/c/aws-c-common/aws_hash_table_swap_harness_negated.i[4553,4566] [2023-11-23 21:16:15,702 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,703 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,703 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,704 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,704 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,710 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,710 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,711 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,711 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,712 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,713 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,713 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,714 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,743 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:16:15,744 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:16:15,744 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:16:15,745 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:16:15,746 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:16:15,746 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:16:15,747 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:16:15,747 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:16:15,748 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:16:15,748 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:16:15,779 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7526-7537] [2023-11-23 21:16:15,883 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,883 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,891 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,892 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,897 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,897 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:16:15,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:16,327 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,327 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,328 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,328 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,328 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,328 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,328 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,328 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,328 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,329 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,329 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,329 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,329 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,329 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,329 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,330 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,330 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,330 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:16,338 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:16:16,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16 WrapperNode [2023-11-23 21:16:16,339 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:16,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:16,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:16:16,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:16:16,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,630 INFO L138 Inliner]: procedures = 772, calls = 2442, calls flagged for inlining = 66, calls inlined = 9, statements flattened = 598 [2023-11-23 21:16:16,631 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:16,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:16:16,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:16:16,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:16:16,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,746 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,769 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:16:16,785 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:16:16,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:16:16,786 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:16:16,787 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (1/1) ... [2023-11-23 21:16:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:16,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:16,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:16:16,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:16:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-23 21:16:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_hash_table [2023-11-23 21:16:16,875 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_hash_table [2023-11-23 21:16:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:16:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 21:16:16,875 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 21:16:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:16:16,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:16:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-23 21:16:16,876 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-23 21:16:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:16:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:16:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:16:16,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:16:16,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:16:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:16:16,878 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:16:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 21:16:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 21:16:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:16:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-23 21:16:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-23 21:16:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:16:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:16:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:16:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:16:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-23 21:16:16,880 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-23 21:16:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:16:16,880 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-23 21:16:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-23 21:16:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:16:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:16:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-23 21:16:16,881 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-23 21:16:16,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:16:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_allocated_hash_table [2023-11-23 21:16:16,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_allocated_hash_table [2023-11-23 21:16:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 21:16:16,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 21:16:16,882 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-23 21:16:16,882 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-23 21:16:16,883 INFO L130 BoogieDeclarations]: Found specification of procedure check_hash_table_unchanged [2023-11-23 21:16:16,883 INFO L138 BoogieDeclarations]: Found implementation of procedure check_hash_table_unchanged [2023-11-23 21:16:16,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:16:17,268 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:16:17,271 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:16:18,301 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:16:18,482 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:16:18,484 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:16:18,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:18 BoogieIcfgContainer [2023-11-23 21:16:18,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:16:18,489 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:16:18,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:16:18,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:16:18,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:16:12" (1/3) ... [2023-11-23 21:16:18,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3089a81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:18, skipping insertion in model container [2023-11-23 21:16:18,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:16" (2/3) ... [2023-11-23 21:16:18,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3089a81a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:18, skipping insertion in model container [2023-11-23 21:16:18,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:18" (3/3) ... [2023-11-23 21:16:18,502 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_swap_harness_negated.i [2023-11-23 21:16:18,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:16:18,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:16:18,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:16:18,609 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;@6e2d80e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:16:18,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:16:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 64 states have internal predecessors, (71), 35 states have call successors, (35), 16 states have call predecessors, (35), 16 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-23 21:16:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:16:18,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:18,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:18,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:18,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:18,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1339488110, now seen corresponding path program 1 times [2023-11-23 21:16:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:18,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860194298] [2023-11-23 21:16:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:18,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:19,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:19,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860194298] [2023-11-23 21:16:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860194298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:19,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:19,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812795998] [2023-11-23 21:16:19,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:19,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:19,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:19,352 INFO L87 Difference]: Start difference. First operand has 112 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 64 states have internal predecessors, (71), 35 states have call successors, (35), 16 states have call predecessors, (35), 16 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:19,956 INFO L93 Difference]: Finished difference Result 163 states and 217 transitions. [2023-11-23 21:16:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:16:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-23 21:16:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:19,969 INFO L225 Difference]: With dead ends: 163 [2023-11-23 21:16:19,969 INFO L226 Difference]: Without dead ends: 125 [2023-11-23 21:16:19,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:19,976 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:19,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 237 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:16:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-23 21:16:20,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2023-11-23 21:16:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 67 states have internal predecessors, (74), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-23 21:16:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 153 transitions. [2023-11-23 21:16:20,036 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 153 transitions. Word has length 18 [2023-11-23 21:16:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:20,037 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 153 transitions. [2023-11-23 21:16:20,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 153 transitions. [2023-11-23 21:16:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:16:20,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:20,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:20,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:16:20,040 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:20,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash 468270914, now seen corresponding path program 1 times [2023-11-23 21:16:20,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:20,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528431204] [2023-11-23 21:16:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:20,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:20,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:20,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528431204] [2023-11-23 21:16:20,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528431204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:20,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:20,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313577458] [2023-11-23 21:16:20,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:20,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:20,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:20,313 INFO L87 Difference]: Start difference. First operand 120 states and 153 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:20,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:20,911 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2023-11-23 21:16:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:16:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-23 21:16:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:20,915 INFO L225 Difference]: With dead ends: 161 [2023-11-23 21:16:20,915 INFO L226 Difference]: Without dead ends: 128 [2023-11-23 21:16:20,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:20,917 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:20,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 235 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:16:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-23 21:16:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-23 21:16:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 70 states have internal predecessors, (77), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-23 21:16:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 163 transitions. [2023-11-23 21:16:20,940 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 163 transitions. Word has length 19 [2023-11-23 21:16:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:20,941 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 163 transitions. [2023-11-23 21:16:20,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:16:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 163 transitions. [2023-11-23 21:16:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 21:16:20,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:20,947 INFO L195 NwaCegarLoop]: trace histogram [7, 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] [2023-11-23 21:16:20,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:16:20,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:20,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:20,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1593682055, now seen corresponding path program 1 times [2023-11-23 21:16:20,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:20,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865724129] [2023-11-23 21:16:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:20,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:21,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:16:21,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506136928] [2023-11-23 21:16:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:21,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:21,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:21,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:21,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:16:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:21,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 2411 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:16:21,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 21:16:21,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:16:21,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:21,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865724129] [2023-11-23 21:16:21,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:16:21,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506136928] [2023-11-23 21:16:21,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506136928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:21,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:21,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:16:21,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077831951] [2023-11-23 21:16:21,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:21,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:16:21,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:16:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:16:21,928 INFO L87 Difference]: Start difference. First operand 128 states and 163 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:16:22,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:22,745 INFO L93 Difference]: Finished difference Result 255 states and 331 transitions. [2023-11-23 21:16:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:16:22,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 95 [2023-11-23 21:16:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:22,748 INFO L225 Difference]: With dead ends: 255 [2023-11-23 21:16:22,748 INFO L226 Difference]: Without dead ends: 132 [2023-11-23 21:16:22,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:16:22,755 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:22,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 464 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:16:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-23 21:16:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-23 21:16:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 73 states have internal predecessors, (80), 44 states have call successors, (44), 16 states have call predecessors, (44), 17 states have return successors, (43), 43 states have call predecessors, (43), 42 states have call successors, (43) [2023-11-23 21:16:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2023-11-23 21:16:22,788 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 95 [2023-11-23 21:16:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:22,789 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2023-11-23 21:16:22,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:16:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2023-11-23 21:16:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 21:16:22,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:22,797 INFO L195 NwaCegarLoop]: trace histogram [7, 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] [2023-11-23 21:16:22,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:23,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:23,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:23,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1304607820, now seen corresponding path program 1 times [2023-11-23 21:16:23,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:23,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412918087] [2023-11-23 21:16:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:23,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-23 21:16:27,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:27,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412918087] [2023-11-23 21:16:27,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412918087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:27,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:27,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-23 21:16:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117745058] [2023-11-23 21:16:27,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:27,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:16:27,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:27,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:16:27,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:16:27,395 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 21:16:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:31,018 INFO L93 Difference]: Finished difference Result 291 states and 380 transitions. [2023-11-23 21:16:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:16:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 104 [2023-11-23 21:16:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:31,024 INFO L225 Difference]: With dead ends: 291 [2023-11-23 21:16:31,024 INFO L226 Difference]: Without dead ends: 173 [2023-11-23 21:16:31,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:16:31,026 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 63 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:31,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 694 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-23 21:16:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-23 21:16:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2023-11-23 21:16:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 92 states have internal predecessors, (98), 52 states have call successors, (52), 16 states have call predecessors, (52), 21 states have return successors, (64), 53 states have call predecessors, (64), 50 states have call successors, (64) [2023-11-23 21:16:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 214 transitions. [2023-11-23 21:16:31,056 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 214 transitions. Word has length 104 [2023-11-23 21:16:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:31,057 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 214 transitions. [2023-11-23 21:16:31,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-23 21:16:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 214 transitions. [2023-11-23 21:16:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-23 21:16:31,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:31,060 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1] [2023-11-23 21:16:31,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:16:31,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:31,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash 464583241, now seen corresponding path program 1 times [2023-11-23 21:16:31,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:31,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928170945] [2023-11-23 21:16:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:31,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:16:32,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928170945] [2023-11-23 21:16:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928170945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674350456] [2023-11-23 21:16:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:32,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:32,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:32,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:16:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:33,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 2433 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 21:16:33,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:33,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:16:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:16:33,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:16:33,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674350456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:33,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:16:33,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2023-11-23 21:16:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615757756] [2023-11-23 21:16:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:33,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:16:33,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:16:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:16:33,433 INFO L87 Difference]: Start difference. First operand 160 states and 214 transitions. Second operand has 9 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-23 21:16:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:34,784 INFO L93 Difference]: Finished difference Result 307 states and 411 transitions. [2023-11-23 21:16:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:16:34,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 109 [2023-11-23 21:16:34,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:34,795 INFO L225 Difference]: With dead ends: 307 [2023-11-23 21:16:34,796 INFO L226 Difference]: Without dead ends: 165 [2023-11-23 21:16:34,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:16:34,798 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 13 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:34,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 731 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 21:16:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-23 21:16:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-11-23 21:16:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 96 states have internal predecessors, (101), 52 states have call successors, (52), 16 states have call predecessors, (52), 23 states have return successors, (72), 54 states have call predecessors, (72), 50 states have call successors, (72) [2023-11-23 21:16:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 225 transitions. [2023-11-23 21:16:34,829 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 225 transitions. Word has length 109 [2023-11-23 21:16:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:34,829 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 225 transitions. [2023-11-23 21:16:34,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-23 21:16:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 225 transitions. [2023-11-23 21:16:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 21:16:34,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:34,832 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:34,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:35,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b05266-8cee-46fd-8614-3135426f6099/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:35,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:35,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash -681841233, now seen corresponding path program 1 times [2023-11-23 21:16:35,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:35,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111039018] [2023-11-23 21:16:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:35,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:16:35,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111039018] [2023-11-23 21:16:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111039018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:35,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:35,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:16:35,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058028569] [2023-11-23 21:16:35,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:35,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:16:35,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:16:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:16:35,646 INFO L87 Difference]: Start difference. First operand 165 states and 225 transitions. Second operand has 7 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 21:16:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:36,636 INFO L93 Difference]: Finished difference Result 323 states and 451 transitions. [2023-11-23 21:16:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:16:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 113 [2023-11-23 21:16:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:36,643 INFO L225 Difference]: With dead ends: 323 [2023-11-23 21:16:36,643 INFO L226 Difference]: Without dead ends: 163 [2023-11-23 21:16:36,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:16:36,647 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:36,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 701 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:16:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-23 21:16:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2023-11-23 21:16:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 93 states have internal predecessors, (98), 51 states have call successors, (51), 16 states have call predecessors, (51), 22 states have return successors, (69), 53 states have call predecessors, (69), 49 states have call successors, (69) [2023-11-23 21:16:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2023-11-23 21:16:36,692 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 113 [2023-11-23 21:16:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:36,694 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2023-11-23 21:16:36,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 21:16:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2023-11-23 21:16:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 21:16:36,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:36,696 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1] [2023-11-23 21:16:36,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:16:36,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:36,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash -74135762, now seen corresponding path program 1 times [2023-11-23 21:16:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:36,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891231131] [2023-11-23 21:16:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:36,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-23 21:16:39,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:39,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891231131] [2023-11-23 21:16:39,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891231131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:39,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:39,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 21:16:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921452923] [2023-11-23 21:16:39,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:39,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:16:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:16:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:16:39,662 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2023-11-23 21:16:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:42,801 INFO L93 Difference]: Finished difference Result 296 states and 390 transitions. [2023-11-23 21:16:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 21:16:42,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 110 [2023-11-23 21:16:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:42,804 INFO L225 Difference]: With dead ends: 296 [2023-11-23 21:16:42,804 INFO L226 Difference]: Without dead ends: 176 [2023-11-23 21:16:42,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:16:42,806 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 74 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:42,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 846 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-23 21:16:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-23 21:16:42,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 161. [2023-11-23 21:16:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 93 states have internal predecessors, (98), 51 states have call successors, (51), 16 states have call predecessors, (51), 22 states have return successors, (66), 53 states have call predecessors, (66), 49 states have call successors, (66) [2023-11-23 21:16:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 215 transitions. [2023-11-23 21:16:42,827 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 215 transitions. Word has length 110 [2023-11-23 21:16:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:42,828 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 215 transitions. [2023-11-23 21:16:42,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 9 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2023-11-23 21:16:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 215 transitions. [2023-11-23 21:16:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 21:16:42,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:42,831 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:42,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:16:42,832 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:42,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:42,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1326126275, now seen corresponding path program 1 times [2023-11-23 21:16:42,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:42,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374290202] [2023-11-23 21:16:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:42,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat