./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a92ce51cbe1b4477c0eaf1c9ccf00706761ad97b08d72c1e8472d77efa497e65 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:14:04,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:14:04,407 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:14:04,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:14:04,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:14:04,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:14:04,444 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:14:04,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:14:04,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:14:04,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:14:04,447 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:14:04,447 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:14:04,448 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:14:04,448 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:14:04,449 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:14:04,450 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:14:04,450 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:14:04,451 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:14:04,452 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:14:04,452 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:14:04,453 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:14:04,454 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:14:04,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:14:04,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:14:04,456 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:14:04,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:14:04,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:14:04,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:14:04,458 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:14:04,458 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:14:04,459 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:14:04,459 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:14:04,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:14:04,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:04,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:14:04,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:14:04,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:14:04,462 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:14:04,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:14:04,463 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:14:04,463 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:14:04,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:14:04,464 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_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92ce51cbe1b4477c0eaf1c9ccf00706761ad97b08d72c1e8472d77efa497e65 [2023-11-12 00:14:04,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:14:04,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:14:04,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:14:04,874 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:14:04,875 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:14:04,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness_negated.i [2023-11-12 00:14:08,166 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:14:08,827 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:14:08,829 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness_negated.i [2023-11-12 00:14:08,883 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/data/6dea8ec2a/41dc62addaf7422ab75785fd11c9e25b/FLAG95a3d481c [2023-11-12 00:14:08,904 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/data/6dea8ec2a/41dc62addaf7422ab75785fd11c9e25b [2023-11-12 00:14:08,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:14:08,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:14:08,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:08,915 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:14:08,921 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:14:08,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:08" (1/1) ... [2023-11-12 00:14:08,926 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d49e61f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:08, skipping insertion in model container [2023-11-12 00:14:08,926 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:08" (1/1) ... [2023-11-12 00:14:09,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:14:09,398 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_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness_negated.i[4496,4509] [2023-11-12 00:14:09,408 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_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness_negated.i[4556,4569] [2023-11-12 00:14:10,973 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:10,979 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:10,980 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:10,983 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,008 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,023 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,024 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,026 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,026 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,028 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,029 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,030 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,030 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:11,539 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:14:11,540 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:14:11,542 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:14:11,543 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:14:11,545 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:14:11,545 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:14:11,546 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:14:11,547 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:14:11,548 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:14:11,549 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:14:12,226 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,226 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,267 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,269 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,276 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,277 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,339 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,340 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,340 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,341 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,341 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,342 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,342 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:12,462 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:14:12,493 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_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness_negated.i[4496,4509] [2023-11-12 00:14:12,494 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_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness_negated.i[4556,4569] [2023-11-12 00:14:12,563 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,565 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,565 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,565 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,568 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,576 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,578 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,580 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,581 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,582 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,583 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,583 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,584 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,627 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:14:12,628 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:14:12,629 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:14:12,630 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:14:12,631 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:14:12,632 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:14:12,633 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:14:12,634 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:14:12,635 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:14:12,635 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:14:12,694 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7526-7537] [2023-11-12 00:14:12,847 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,848 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,857 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,858 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,864 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,865 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,881 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,882 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,882 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,883 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,884 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,885 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,886 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:14:12,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:13,190 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,190 WARN L672 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,190 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,190 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,190 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,191 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,191 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,191 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,191 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,191 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,191 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,192 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,192 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,192 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,192 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,192 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,192 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,193 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:14:13,201 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:14:13,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13 WrapperNode [2023-11-12 00:14:13,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:13,218 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:13,218 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:14:13,218 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:14:13,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,362 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,494 INFO L138 Inliner]: procedures = 773, calls = 2436, calls flagged for inlining = 69, calls inlined = 18, statements flattened = 964 [2023-11-12 00:14:13,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:13,496 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:14:13,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:14:13,497 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:14:13,507 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,603 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,620 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,643 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:14:13,644 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:14:13,644 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:14:13,644 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:14:13,645 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (1/1) ... [2023-11-12 00:14:13,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:13,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:13,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:14:13,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:14:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 00:14:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:14:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:14:13,727 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:14:13,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:14:13,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:14:13,727 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-12 00:14:13,727 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-12 00:14:13,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:14:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:14:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:14:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:14:13,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:14:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:14:13,728 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:14:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:14:13,729 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:14:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 00:14:13,729 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 00:14:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:14:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 00:14:13,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 00:14:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:14:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:14:13,730 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:14:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:14:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-12 00:14:13,730 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-12 00:14:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-11-12 00:14:13,731 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-11-12 00:14:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:14:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-12 00:14:13,731 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-12 00:14:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:14:13,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:14:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-11-12 00:14:13,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-11-12 00:14:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2023-11-12 00:14:13,732 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2023-11-12 00:14:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:14:13,732 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:14:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_int [2023-11-12 00:14:13,733 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_int [2023-11-12 00:14:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-12 00:14:13,733 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-12 00:14:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-12 00:14:13,733 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-12 00:14:13,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:14:13,734 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:14:13,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:14:13,734 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 00:14:13,734 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 00:14:13,734 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-11-12 00:14:13,734 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-11-12 00:14:13,735 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 00:14:13,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 00:14:13,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:14:14,200 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:14:14,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:14:14,456 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-11-12 00:14:14,457 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-11-12 00:14:15,680 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !true; [2023-11-12 00:14:15,710 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:14:16,065 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:14:16,065 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-12 00:14:16,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:16 BoogieIcfgContainer [2023-11-12 00:14:16,069 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:14:16,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:14:16,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:14:16,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:14:16,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:14:08" (1/3) ... [2023-11-12 00:14:16,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd79358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:16, skipping insertion in model container [2023-11-12 00:14:16,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:13" (2/3) ... [2023-11-12 00:14:16,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd79358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:16, skipping insertion in model container [2023-11-12 00:14:16,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:16" (3/3) ... [2023-11-12 00:14:16,079 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_foreach_harness_negated.i [2023-11-12 00:14:16,099 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:14:16,099 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:14:16,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:14:16,164 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;@60784fb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:14:16,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:14:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 128 states have (on average 1.2265625) internal successors, (157), 125 states have internal predecessors, (157), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-12 00:14:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 00:14:16,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:16,188 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:16,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:16,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:16,197 INFO L85 PathProgramCache]: Analyzing trace with hash -216216162, now seen corresponding path program 1 times [2023-11-12 00:14:16,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:16,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213930409] [2023-11-12 00:14:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:16,800 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:16,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615418787] [2023-11-12 00:14:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:16,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:16,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:16,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:16,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:14:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:17,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 2316 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:14:17,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:14:17,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:17,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:17,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213930409] [2023-11-12 00:14:17,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:17,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615418787] [2023-11-12 00:14:17,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615418787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:17,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:17,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:14:17,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271994790] [2023-11-12 00:14:17,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:17,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:14:17,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:14:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:17,707 INFO L87 Difference]: Start difference. First operand has 229 states, 128 states have (on average 1.2265625) internal successors, (157), 125 states have internal predecessors, (157), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-12 00:14:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:17,981 INFO L93 Difference]: Finished difference Result 405 states and 592 transitions. [2023-11-12 00:14:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:14:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 87 [2023-11-12 00:14:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:17,997 INFO L225 Difference]: With dead ends: 405 [2023-11-12 00:14:17,998 INFO L226 Difference]: Without dead ends: 227 [2023-11-12 00:14:18,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:18,008 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:18,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:14:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-12 00:14:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-11-12 00:14:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 124 states have internal predecessors, (146), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-12 00:14:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 307 transitions. [2023-11-12 00:14:18,101 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 307 transitions. Word has length 87 [2023-11-12 00:14:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:18,103 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 307 transitions. [2023-11-12 00:14:18,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-12 00:14:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 307 transitions. [2023-11-12 00:14:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-12 00:14:18,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:18,110 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:18,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:14:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:14:18,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:18,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash -805758113, now seen corresponding path program 1 times [2023-11-12 00:14:18,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:18,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762311104] [2023-11-12 00:14:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:18,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:18,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:18,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262712162] [2023-11-12 00:14:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:18,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:18,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:18,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:18,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:14:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:19,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 2344 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:14:19,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:14:19,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-12 00:14:19,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762311104] [2023-11-12 00:14:19,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262712162] [2023-11-12 00:14:19,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262712162] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:14:19,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:14:19,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-11-12 00:14:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861490960] [2023-11-12 00:14:19,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:19,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:14:19,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:14:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:14:19,754 INFO L87 Difference]: Start difference. First operand 227 states and 307 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-12 00:14:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:20,969 INFO L93 Difference]: Finished difference Result 411 states and 571 transitions. [2023-11-12 00:14:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:14:20,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 92 [2023-11-12 00:14:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:20,977 INFO L225 Difference]: With dead ends: 411 [2023-11-12 00:14:20,978 INFO L226 Difference]: Without dead ends: 242 [2023-11-12 00:14:20,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:14:20,983 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 309 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:20,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1182 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:14:20,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-12 00:14:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2023-11-12 00:14:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 133 states have internal predecessors, (156), 86 states have call successors, (86), 23 states have call predecessors, (86), 24 states have return successors, (92), 85 states have call predecessors, (92), 85 states have call successors, (92) [2023-11-12 00:14:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 334 transitions. [2023-11-12 00:14:21,054 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 334 transitions. Word has length 92 [2023-11-12 00:14:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:21,059 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 334 transitions. [2023-11-12 00:14:21,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-12 00:14:21,066 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 334 transitions. [2023-11-12 00:14:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:14:21,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:21,076 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:21,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:21,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:21,287 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:21,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:21,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2084163886, now seen corresponding path program 1 times [2023-11-12 00:14:21,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:21,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124126161] [2023-11-12 00:14:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:21,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:21,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:21,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035938905] [2023-11-12 00:14:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:21,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:21,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:21,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:14:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:22,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 2349 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:14:22,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:14:22,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:22,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:22,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124126161] [2023-11-12 00:14:22,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:22,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035938905] [2023-11-12 00:14:22,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035938905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:22,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:22,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:14:22,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691383225] [2023-11-12 00:14:22,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:22,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:14:22,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:22,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:14:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:14:22,204 INFO L87 Difference]: Start difference. First operand 242 states and 334 transitions. Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-12 00:14:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:22,817 INFO L93 Difference]: Finished difference Result 452 states and 630 transitions. [2023-11-12 00:14:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:14:22,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 93 [2023-11-12 00:14:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:22,823 INFO L225 Difference]: With dead ends: 452 [2023-11-12 00:14:22,824 INFO L226 Difference]: Without dead ends: 246 [2023-11-12 00:14:22,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:14:22,827 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:22,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1052 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:14:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-12 00:14:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2023-11-12 00:14:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 136 states have internal predecessors, (159), 86 states have call successors, (86), 23 states have call predecessors, (86), 25 states have return successors, (93), 86 states have call predecessors, (93), 85 states have call successors, (93) [2023-11-12 00:14:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 338 transitions. [2023-11-12 00:14:22,872 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 338 transitions. Word has length 93 [2023-11-12 00:14:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:22,873 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 338 transitions. [2023-11-12 00:14:22,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-12 00:14:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 338 transitions. [2023-11-12 00:14:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 00:14:22,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:22,876 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:22,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:23,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:23,088 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:23,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:23,089 INFO L85 PathProgramCache]: Analyzing trace with hash -288733836, now seen corresponding path program 1 times [2023-11-12 00:14:23,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:23,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532153348] [2023-11-12 00:14:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:23,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-12 00:14:25,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:25,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532153348] [2023-11-12 00:14:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532153348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:14:25,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866327886] [2023-11-12 00:14:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:25,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:25,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:25,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:25,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:14:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:26,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 00:14:26,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:26,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 00:14:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:14:27,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:27,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866327886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:27,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:14:27,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2023-11-12 00:14:27,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609157355] [2023-11-12 00:14:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:27,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:14:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:14:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:14:27,256 INFO L87 Difference]: Start difference. First operand 246 states and 338 transitions. Second operand has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-12 00:14:30,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:14:32,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:34,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:36,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:38,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:40,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:43,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:45,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:47,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:49,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:51,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:53,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:55,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:57,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:14:59,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:15:01,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:15:03,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:15:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:03,882 INFO L93 Difference]: Finished difference Result 488 states and 668 transitions. [2023-11-12 00:15:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:15:03,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 97 [2023-11-12 00:15:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:03,890 INFO L225 Difference]: With dead ends: 488 [2023-11-12 00:15:03,891 INFO L226 Difference]: Without dead ends: 294 [2023-11-12 00:15:03,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:15:03,893 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 70 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 17 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:03,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1276 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 506 Invalid, 17 Unknown, 0 Unchecked, 36.5s Time] [2023-11-12 00:15:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-12 00:15:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 290. [2023-11-12 00:15:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 159 states have (on average 1.1823899371069182) internal successors, (188), 163 states have internal predecessors, (188), 94 states have call successors, (94), 32 states have call predecessors, (94), 36 states have return successors, (105), 94 states have call predecessors, (105), 93 states have call successors, (105) [2023-11-12 00:15:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 387 transitions. [2023-11-12 00:15:03,935 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 387 transitions. Word has length 97 [2023-11-12 00:15:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:03,936 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 387 transitions. [2023-11-12 00:15:03,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-12 00:15:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 387 transitions. [2023-11-12 00:15:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:15:03,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:03,939 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:03,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:04,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd0483c5-7cc1-4e75-a774-00afa38d7f7c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:04,150 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:15:04,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:04,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1539627680, now seen corresponding path program 1 times [2023-11-12 00:15:04,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:04,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906186167] [2023-11-12 00:15:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat