./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/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_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/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_425a29c6-d64e-40aa-a578-7dc4b89dcf04/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 418444d45b0c7850a9989314dcd5f57e0b0ef1cb83134fc862bc4bb0b0db0821 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:09:26,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:09:26,210 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:09:26,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:09:26,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:09:26,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:09:26,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:09:26,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:09:26,263 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:09:26,268 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:09:26,268 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:09:26,270 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:09:26,270 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:09:26,272 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:09:26,273 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:09:26,273 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:09:26,274 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:09:26,274 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:09:26,274 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:09:26,275 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:09:26,276 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:09:26,276 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:09:26,278 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:09:26,278 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:09:26,279 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:09:26,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:09:26,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:09:26,280 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:09:26,280 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:09:26,281 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:09:26,282 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:09:26,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:09:26,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:09:26,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:09:26,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:26,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:09:26,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:09:26,285 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:09:26,285 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:09:26,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:09:26,286 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:09:26,286 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:09:26,287 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:09:26,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:09:26,288 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_425a29c6-d64e-40aa-a578-7dc4b89dcf04/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 418444d45b0c7850a9989314dcd5f57e0b0ef1cb83134fc862bc4bb0b0db0821 [2023-11-23 21:09:26,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:09:26,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:09:26,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:09:26,608 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:09:26,609 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:09:26,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i [2023-11-23 21:09:29,720 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:09:30,362 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:09:30,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i [2023-11-23 21:09:30,408 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/data/130d1cdea/cfd448bdbff74d509394d58754ae7c15/FLAG18d6c67ee [2023-11-23 21:09:30,426 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/data/130d1cdea/cfd448bdbff74d509394d58754ae7c15 [2023-11-23 21:09:30,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:09:30,435 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:09:30,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:30,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:09:30,442 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:09:30,442 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:30" (1/1) ... [2023-11-23 21:09:30,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45962073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:30, skipping insertion in model container [2023-11-23 21:09:30,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:30" (1/1) ... [2023-11-23 21:09:30,597 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:09:30,881 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_425a29c6-d64e-40aa-a578-7dc4b89dcf04/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i[4491,4504] [2023-11-23 21:09:30,891 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_425a29c6-d64e-40aa-a578-7dc4b89dcf04/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i[4551,4564] [2023-11-23 21:09:32,182 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,186 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,186 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,189 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,192 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,209 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,210 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,212 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,213 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,215 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,217 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,218 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,218 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:32,785 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:09:32,787 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:09:32,788 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:09:32,790 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:09:32,792 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:09:32,793 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:09:32,794 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:09:32,795 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:09:32,796 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:09:32,797 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:09:33,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,443 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,481 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,482 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,490 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,491 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,513 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,515 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,515 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,516 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,517 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,517 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:33,651 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:09:33,665 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_425a29c6-d64e-40aa-a578-7dc4b89dcf04/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i[4491,4504] [2023-11-23 21:09:33,666 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_425a29c6-d64e-40aa-a578-7dc4b89dcf04/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness_negated.i[4551,4564] [2023-11-23 21:09:33,704 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,704 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,705 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,706 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,706 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,712 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,713 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,714 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,715 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,716 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,717 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,717 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,718 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,752 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:09:33,753 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:09:33,754 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:09:33,755 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:09:33,757 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:09:33,757 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:09:33,758 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:09:33,759 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:09:33,760 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:09:33,763 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:09:33,803 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7526-7537] [2023-11-23 21:09:33,938 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,938 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,951 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,952 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,959 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,960 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,976 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,977 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,978 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,979 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,985 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,986 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:33,986 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:09:34,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:34,431 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,431 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,431 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,431 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,432 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,432 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,436 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,437 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,437 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,437 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,437 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,437 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,437 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,438 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,438 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,438 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,438 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,438 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:09:34,447 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:09:34,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34 WrapperNode [2023-11-23 21:09:34,448 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:34,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:34,450 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:09:34,451 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:09:34,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,736 INFO L138 Inliner]: procedures = 772, calls = 2456, calls flagged for inlining = 68, calls inlined = 18, statements flattened = 968 [2023-11-23 21:09:34,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:34,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:09:34,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:09:34,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:09:34,751 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,841 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,848 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,859 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,882 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:09:34,883 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:09:34,883 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:09:34,883 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:09:34,884 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (1/1) ... [2023-11-23 21:09:34,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:34,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:34,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:09:34,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:09:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-23 21:09:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_hash_table [2023-11-23 21:09:34,986 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_hash_table [2023-11-23 21:09:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:09:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 21:09:34,987 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 21:09:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:09:34,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:09:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-23 21:09:34,988 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-23 21:09:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:09:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:09:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:09:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:09:34,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:09:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:09:34,990 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:09:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 21:09:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 21:09:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:09:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-23 21:09:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-23 21:09:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:09:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:09:34,992 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:09:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:09:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2023-11-23 21:09:34,992 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2023-11-23 21:09:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-23 21:09:34,993 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-23 21:09:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2023-11-23 21:09:34,993 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2023-11-23 21:09:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-11-23 21:09:34,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-11-23 21:09:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:09:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_get_entry_count [2023-11-23 21:09:34,994 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_get_entry_count [2023-11-23 21:09:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-23 21:09:35,017 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-23 21:09:35,017 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-11-23 21:09:35,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-11-23 21:09:35,017 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2023-11-23 21:09:35,017 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2023-11-23 21:09:35,017 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2023-11-23 21:09:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2023-11-23 21:09:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:09:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:09:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-23 21:09:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-23 21:09:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:09:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_allocated_hash_table [2023-11-23 21:09:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_allocated_hash_table [2023-11-23 21:09:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 21:09:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 21:09:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-23 21:09:35,019 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-23 21:09:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure check_hash_table_unchanged [2023-11-23 21:09:35,019 INFO L138 BoogieDeclarations]: Found implementation of procedure check_hash_table_unchanged [2023-11-23 21:09:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:09:35,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:09:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:09:35,458 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:09:35,461 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:09:35,636 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2023-11-23 21:09:35,750 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-11-23 21:09:36,624 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !true; [2023-11-23 21:09:36,625 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !true; [2023-11-23 21:09:36,625 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-11-23 21:09:36,625 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##60: assume !true; [2023-11-23 21:09:36,625 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##51: assume !true; [2023-11-23 21:09:36,660 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:09:36,989 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:09:36,989 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-23 21:09:36,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:36 BoogieIcfgContainer [2023-11-23 21:09:36,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:09:36,999 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:09:36,999 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:09:37,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:09:37,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:30" (1/3) ... [2023-11-23 21:09:37,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38853d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:37, skipping insertion in model container [2023-11-23 21:09:37,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:34" (2/3) ... [2023-11-23 21:09:37,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38853d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:37, skipping insertion in model container [2023-11-23 21:09:37,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:36" (3/3) ... [2023-11-23 21:09:37,010 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_eq_harness_negated.i [2023-11-23 21:09:37,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:09:37,038 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:09:37,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:09:37,132 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;@1d368ec3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:09:37,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:09:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 248 states, 140 states have (on average 1.2214285714285715) internal successors, (171), 134 states have internal predecessors, (171), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-23 21:09:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-11-23 21:09:37,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:37,163 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:37,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:37,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1114410107, now seen corresponding path program 1 times [2023-11-23 21:09:37,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:37,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879340471] [2023-11-23 21:09:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:37,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:37,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:09:37,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58061121] [2023-11-23 21:09:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:37,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:37,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:37,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:09:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:38,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:09:38,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-11-23 21:09:39,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:39,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879340471] [2023-11-23 21:09:39,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:09:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58061121] [2023-11-23 21:09:39,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58061121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:39,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:39,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:09:39,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610560057] [2023-11-23 21:09:39,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:39,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:09:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:09:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:39,161 INFO L87 Difference]: Start difference. First operand has 248 states, 140 states have (on average 1.2214285714285715) internal successors, (171), 134 states have internal predecessors, (171), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 7 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-23 21:09:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:40,200 INFO L93 Difference]: Finished difference Result 409 states and 602 transitions. [2023-11-23 21:09:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:09:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 213 [2023-11-23 21:09:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:40,217 INFO L225 Difference]: With dead ends: 409 [2023-11-23 21:09:40,218 INFO L226 Difference]: Without dead ends: 253 [2023-11-23 21:09:40,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:09:40,227 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 47 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:40,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1561 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:09:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-23 21:09:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2023-11-23 21:09:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 135 states have (on average 1.2074074074074075) internal successors, (163), 137 states have internal predecessors, (163), 90 states have call successors, (90), 25 states have call predecessors, (90), 25 states have return successors, (89), 88 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-23 21:09:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 342 transitions. [2023-11-23 21:09:40,307 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 342 transitions. Word has length 213 [2023-11-23 21:09:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:40,309 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 342 transitions. [2023-11-23 21:09:40,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-23 21:09:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 342 transitions. [2023-11-23 21:09:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-23 21:09:40,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:40,315 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:40,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:40,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:40,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:40,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1060246561, now seen corresponding path program 1 times [2023-11-23 21:09:40,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:40,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193953151] [2023-11-23 21:09:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:40,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:40,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:09:40,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417916603] [2023-11-23 21:09:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:40,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:40,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:40,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:40,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:09:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:41,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 3167 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:09:41,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-11-23 21:09:41,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:41,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:41,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193953151] [2023-11-23 21:09:41,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:09:41,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417916603] [2023-11-23 21:09:41,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417916603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:41,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:41,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:09:41,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846408187] [2023-11-23 21:09:41,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:41,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:09:41,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:09:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:41,753 INFO L87 Difference]: Start difference. First operand 251 states and 342 transitions. Second operand has 7 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-23 21:09:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:42,669 INFO L93 Difference]: Finished difference Result 260 states and 351 transitions. [2023-11-23 21:09:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:09:42,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 217 [2023-11-23 21:09:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:42,677 INFO L225 Difference]: With dead ends: 260 [2023-11-23 21:09:42,677 INFO L226 Difference]: Without dead ends: 258 [2023-11-23 21:09:42,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:09:42,679 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 47 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:42,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1555 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:09:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-23 21:09:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2023-11-23 21:09:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 138 states have (on average 1.2028985507246377) internal successors, (166), 141 states have internal predecessors, (166), 91 states have call successors, (91), 26 states have call predecessors, (91), 26 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-23 21:09:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 347 transitions. [2023-11-23 21:09:42,730 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 347 transitions. Word has length 217 [2023-11-23 21:09:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:42,733 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 347 transitions. [2023-11-23 21:09:42,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-23 21:09:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 347 transitions. [2023-11-23 21:09:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-23 21:09:42,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:42,747 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:42,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:42,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:42,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:42,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1825960531, now seen corresponding path program 1 times [2023-11-23 21:09:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740098683] [2023-11-23 21:09:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:42,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:43,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:09:43,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835723876] [2023-11-23 21:09:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:43,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:43,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:43,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:43,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:09:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:44,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:09:44,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2023-11-23 21:09:44,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:44,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740098683] [2023-11-23 21:09:44,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:09:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835723876] [2023-11-23 21:09:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835723876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:44,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:44,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 21:09:44,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265359858] [2023-11-23 21:09:44,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:44,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:09:44,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:44,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:09:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:09:44,260 INFO L87 Difference]: Start difference. First operand 256 states and 347 transitions. Second operand has 10 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-23 21:09:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:45,270 INFO L93 Difference]: Finished difference Result 269 states and 377 transitions. [2023-11-23 21:09:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:09:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 219 [2023-11-23 21:09:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:45,275 INFO L225 Difference]: With dead ends: 269 [2023-11-23 21:09:45,275 INFO L226 Difference]: Without dead ends: 267 [2023-11-23 21:09:45,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:09:45,277 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 49 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:45,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 2401 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:09:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-23 21:09:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 259. [2023-11-23 21:09:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 140 states have (on average 1.2) internal successors, (168), 143 states have internal predecessors, (168), 91 states have call successors, (91), 26 states have call predecessors, (91), 27 states have return successors, (108), 89 states have call predecessors, (108), 90 states have call successors, (108) [2023-11-23 21:09:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 367 transitions. [2023-11-23 21:09:45,328 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 367 transitions. Word has length 219 [2023-11-23 21:09:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:45,330 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 367 transitions. [2023-11-23 21:09:45,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-23 21:09:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 367 transitions. [2023-11-23 21:09:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-23 21:09:45,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:45,338 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:45,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 21:09:45,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:45,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:45,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:45,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1732704700, now seen corresponding path program 1 times [2023-11-23 21:09:45,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:45,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263407961] [2023-11-23 21:09:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:45,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:45,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:09:45,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782789713] [2023-11-23 21:09:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:45,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:45,705 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:45,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:09:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:46,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 3199 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 21:09:46,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2023-11-23 21:09:46,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:46,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:46,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263407961] [2023-11-23 21:09:46,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:09:46,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782789713] [2023-11-23 21:09:46,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782789713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:46,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:46,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 21:09:46,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109368703] [2023-11-23 21:09:46,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:46,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:09:46,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:09:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:09:46,716 INFO L87 Difference]: Start difference. First operand 259 states and 367 transitions. Second operand has 12 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) [2023-11-23 21:09:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:47,893 INFO L93 Difference]: Finished difference Result 276 states and 405 transitions. [2023-11-23 21:09:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:09:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) Word has length 225 [2023-11-23 21:09:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:47,898 INFO L225 Difference]: With dead ends: 276 [2023-11-23 21:09:47,898 INFO L226 Difference]: Without dead ends: 274 [2023-11-23 21:09:47,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:09:47,900 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 50 mSDsluCounter, 2697 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:47,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 2982 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:09:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-23 21:09:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 262. [2023-11-23 21:09:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 142 states have (on average 1.1971830985915493) internal successors, (170), 145 states have internal predecessors, (170), 91 states have call successors, (91), 26 states have call predecessors, (91), 28 states have return successors, (112), 90 states have call predecessors, (112), 90 states have call successors, (112) [2023-11-23 21:09:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 373 transitions. [2023-11-23 21:09:47,926 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 373 transitions. Word has length 225 [2023-11-23 21:09:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:47,928 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 373 transitions. [2023-11-23 21:09:47,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) [2023-11-23 21:09:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 373 transitions. [2023-11-23 21:09:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-23 21:09:47,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:47,933 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:09:47,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:48,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:48,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:48,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1385670600, now seen corresponding path program 1 times [2023-11-23 21:09:48,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:48,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742687075] [2023-11-23 21:09:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:48,325 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:09:48,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112970941] [2023-11-23 21:09:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:48,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:48,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:48,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:48,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:09:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:49,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 3230 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:09:49,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-23 21:09:49,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:49,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:49,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742687075] [2023-11-23 21:09:49,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:09:49,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112970941] [2023-11-23 21:09:49,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112970941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:49,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:49,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:09:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055594694] [2023-11-23 21:09:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:49,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:49,271 INFO L87 Difference]: Start difference. First operand 262 states and 373 transitions. Second operand has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-23 21:09:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:49,701 INFO L93 Difference]: Finished difference Result 526 states and 754 transitions. [2023-11-23 21:09:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:49,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) Word has length 229 [2023-11-23 21:09:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:49,705 INFO L225 Difference]: With dead ends: 526 [2023-11-23 21:09:49,705 INFO L226 Difference]: Without dead ends: 266 [2023-11-23 21:09:49,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 225 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 21:09:49,708 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 1 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:49,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1208 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:09:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-23 21:09:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2023-11-23 21:09:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 145 states have (on average 1.193103448275862) internal successors, (173), 148 states have internal predecessors, (173), 91 states have call successors, (91), 26 states have call predecessors, (91), 29 states have return successors, (113), 91 states have call predecessors, (113), 90 states have call successors, (113) [2023-11-23 21:09:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 377 transitions. [2023-11-23 21:09:49,732 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 377 transitions. Word has length 229 [2023-11-23 21:09:49,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:49,732 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 377 transitions. [2023-11-23 21:09:49,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-23 21:09:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 377 transitions. [2023-11-23 21:09:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-23 21:09:49,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:49,737 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:09:49,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:49,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:49,960 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:49,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash 891852088, now seen corresponding path program 1 times [2023-11-23 21:09:49,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:49,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847253583] [2023-11-23 21:09:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:49,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-23 21:09:54,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:54,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847253583] [2023-11-23 21:09:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847253583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174683823] [2023-11-23 21:09:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:54,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:54,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:54,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_425a29c6-d64e-40aa-a578-7dc4b89dcf04/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:09:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:55,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 3226 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-23 21:09:55,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:55,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:09:55,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:09:56,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:09:56,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:09:56,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2023-11-23 21:09:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:09:56,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-23 21:09:56,123 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 5 treesize of output 3 [2023-11-23 21:09:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:09:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:09:56,143 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:09:56,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 21:10:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 94 proven. 280 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-23 21:10:07,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:10:08,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174683823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:08,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785643991] [2023-11-23 21:10:08,251 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2023-11-23 21:10:08,252 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:10:08,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:10:08,262 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:10:08,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs