./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_next_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/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_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/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_65b56422-3d24-4d87-b5ef-25fffa45f624/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 13ab51b5126028da19fd5973a25f590452a4763e1cc4e396aeee438668151298 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:01:58,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:01:58,355 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 01:01:58,370 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:01:58,371 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:01:58,416 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:01:58,417 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:01:58,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:01:58,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:01:58,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:01:58,427 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:01:58,427 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:01:58,428 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:01:58,430 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:01:58,430 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:01:58,431 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:01:58,431 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:01:58,432 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:01:58,432 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:01:58,433 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:01:58,433 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:01:58,434 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:01:58,435 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:01:58,435 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:01:58,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:01:58,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:01:58,437 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:01:58,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:01:58,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:01:58,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:01:58,439 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:01:58,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:01:58,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:01:58,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:58,440 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:01:58,440 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:01:58,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:01:58,441 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:01:58,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:01:58,441 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:01:58,442 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:01:58,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:01:58,442 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_65b56422-3d24-4d87-b5ef-25fffa45f624/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ab51b5126028da19fd5973a25f590452a4763e1cc4e396aeee438668151298 [2023-11-12 01:01:58,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:01:58,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:01:58,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:01:58,801 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:01:58,802 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:01:58,803 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_next_harness.i [2023-11-12 01:02:01,968 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:02:02,716 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:02:02,718 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/sv-benchmarks/c/aws-c-common/aws_hash_iter_next_harness.i [2023-11-12 01:02:02,763 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/data/09ab8b03f/590c646155e84f5d9b0bfd72796f4321/FLAG7cf01bb36 [2023-11-12 01:02:02,782 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/data/09ab8b03f/590c646155e84f5d9b0bfd72796f4321 [2023-11-12 01:02:02,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:02:02,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:02:02,792 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:02,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:02:02,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:02:02,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:02" (1/1) ... [2023-11-12 01:02:02,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bcf79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:02, skipping insertion in model container [2023-11-12 01:02:02,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:02" (1/1) ... [2023-11-12 01:02:02,953 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:02:03,255 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_65b56422-3d24-4d87-b5ef-25fffa45f624/sv-benchmarks/c/aws-c-common/aws_hash_iter_next_harness.i[4492,4505] [2023-11-12 01:02:03,272 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_65b56422-3d24-4d87-b5ef-25fffa45f624/sv-benchmarks/c/aws-c-common/aws_hash_iter_next_harness.i[4552,4565] [2023-11-12 01:02:04,506 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,507 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,507 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,508 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,509 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,524 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,525 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,527 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,528 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,530 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,531 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,532 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:04,532 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,053 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 01:02:05,057 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 01:02:05,060 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 01:02:05,063 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 01:02:05,066 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 01:02:05,068 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 01:02:05,070 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 01:02:05,071 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 01:02:05,072 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 01:02:05,074 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 01:02:05,673 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,673 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,704 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,706 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,713 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,713 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,735 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,738 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,738 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,739 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,740 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,741 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,741 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:05,859 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:02:05,883 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_65b56422-3d24-4d87-b5ef-25fffa45f624/sv-benchmarks/c/aws-c-common/aws_hash_iter_next_harness.i[4492,4505] [2023-11-12 01:02:05,884 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_65b56422-3d24-4d87-b5ef-25fffa45f624/sv-benchmarks/c/aws-c-common/aws_hash_iter_next_harness.i[4552,4565] [2023-11-12 01:02:05,936 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,937 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,937 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,937 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,939 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,949 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,950 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,951 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,952 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,953 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,953 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,954 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,954 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:05,988 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 01:02:05,989 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 01:02:05,990 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 01:02:05,991 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 01:02:05,992 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 01:02:05,993 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 01:02:05,993 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 01:02:05,995 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 01:02:05,995 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 01:02:05,996 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 01:02:06,052 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-12 01:02:06,226 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,226 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,234 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,235 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,239 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,240 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,256 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,257 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,257 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,258 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,258 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,259 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,259 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:02:06,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:06,610 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,610 WARN L672 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,610 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,610 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,610 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,611 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,611 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,611 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,611 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,611 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,611 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,612 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,612 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,612 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,612 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,612 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,612 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,613 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:02:06,621 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:02:06,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06 WrapperNode [2023-11-12 01:02:06,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:06,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:06,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:02:06,623 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:02:06,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:06,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:06,882 INFO L138 Inliner]: procedures = 772, calls = 2453, calls flagged for inlining = 67, calls inlined = 11, statements flattened = 643 [2023-11-12 01:02:06,883 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:06,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:02:06,884 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:02:06,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:02:06,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:06,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:06,913 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:06,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:06,976 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:06,986 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:07,003 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:07,016 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:07,026 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:02:07,027 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:02:07,027 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:02:07,027 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:02:07,028 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (1/1) ... [2023-11-12 01:02:07,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:07,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:07,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:02:07,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:02:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 01:02:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:02:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 01:02:07,109 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 01:02:07,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 01:02:07,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 01:02:07,110 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-12 01:02:07,110 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-12 01:02:07,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:02:07,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:02:07,111 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_next [2023-11-12 01:02:07,111 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_next [2023-11-12 01:02:07,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:02:07,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:02:07,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:02:07,111 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 01:02:07,112 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 01:02:07,112 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 01:02:07,113 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 01:02:07,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:02:07,114 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 01:02:07,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 01:02:07,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:02:07,114 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 01:02:07,114 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 01:02:07,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:02:07,115 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-12 01:02:07,115 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-12 01:02:07,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:02:07,115 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-12 01:02:07,115 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-12 01:02:07,115 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2023-11-12 01:02:07,116 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2023-11-12 01:02:07,116 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:02:07,116 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:02:07,116 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-12 01:02:07,116 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-12 01:02:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-12 01:02:07,117 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-12 01:02:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 01:02:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 01:02:07,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 01:02:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 01:02:07,117 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 01:02:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:02:07,541 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:02:07,543 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:02:08,906 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:02:09,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:02:09,183 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:02:09,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:09 BoogieIcfgContainer [2023-11-12 01:02:09,186 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:02:09,188 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:02:09,188 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:02:09,192 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:02:09,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:02:02" (1/3) ... [2023-11-12 01:02:09,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1614d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:09, skipping insertion in model container [2023-11-12 01:02:09,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:06" (2/3) ... [2023-11-12 01:02:09,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1614d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:09, skipping insertion in model container [2023-11-12 01:02:09,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:09" (3/3) ... [2023-11-12 01:02:09,195 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_next_harness.i [2023-11-12 01:02:09,215 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:02:09,215 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:02:09,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:02:09,274 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;@63641c50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:02:09,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:02:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 69 states have internal predecessors, (80), 43 states have call successors, (43), 16 states have call predecessors, (43), 16 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-12 01:02:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-12 01:02:09,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:09,297 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:09,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:09,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2004362198, now seen corresponding path program 1 times [2023-11-12 01:02:09,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:09,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542912336] [2023-11-12 01:02:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:09,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:09,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:09,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188619172] [2023-11-12 01:02:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:09,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:09,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:09,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:09,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:02:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:10,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 01:02:10,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 01:02:10,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:02:10,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542912336] [2023-11-12 01:02:10,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188619172] [2023-11-12 01:02:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188619172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:10,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:10,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:02:10,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494954303] [2023-11-12 01:02:10,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:10,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:02:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:10,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:02:10,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:02:10,877 INFO L87 Difference]: Start difference. First operand has 129 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 69 states have internal predecessors, (80), 43 states have call successors, (43), 16 states have call predecessors, (43), 16 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-12 01:02:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:11,780 INFO L93 Difference]: Finished difference Result 237 states and 316 transitions. [2023-11-12 01:02:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:11,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) Word has length 116 [2023-11-12 01:02:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:11,794 INFO L225 Difference]: With dead ends: 237 [2023-11-12 01:02:11,794 INFO L226 Difference]: Without dead ends: 129 [2023-11-12 01:02:11,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:02:11,802 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 119 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:11,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 448 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 01:02:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-12 01:02:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-12 01:02:11,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 43 states have call successors, (43), 16 states have call predecessors, (43), 17 states have return successors, (45), 42 states have call predecessors, (45), 42 states have call successors, (45) [2023-11-12 01:02:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2023-11-12 01:02:11,861 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 116 [2023-11-12 01:02:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:11,861 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2023-11-12 01:02:11,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-12 01:02:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2023-11-12 01:02:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-12 01:02:11,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:11,866 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:11,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 01:02:12,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 01:02:12,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:12,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:12,078 INFO L85 PathProgramCache]: Analyzing trace with hash 647864956, now seen corresponding path program 1 times [2023-11-12 01:02:12,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:12,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095815722] [2023-11-12 01:02:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:12,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:12,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:12,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686289670] [2023-11-12 01:02:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:12,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:12,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:12,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:12,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:02:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:13,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:02:13,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 49 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 01:02:13,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-12 01:02:13,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:13,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095815722] [2023-11-12 01:02:13,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:13,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686289670] [2023-11-12 01:02:13,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686289670] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:13,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:02:13,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-11-12 01:02:13,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333573034] [2023-11-12 01:02:13,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:13,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:02:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:13,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:02:13,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:02:13,616 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-12 01:02:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:14,681 INFO L93 Difference]: Finished difference Result 194 states and 251 transitions. [2023-11-12 01:02:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:02:14,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) Word has length 117 [2023-11-12 01:02:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:14,684 INFO L225 Difference]: With dead ends: 194 [2023-11-12 01:02:14,685 INFO L226 Difference]: Without dead ends: 129 [2023-11-12 01:02:14,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 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 01:02:14,687 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 143 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:14,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 643 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 01:02:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-12 01:02:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-12 01:02:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 43 states have call successors, (43), 16 states have call predecessors, (43), 17 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2023-11-12 01:02:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2023-11-12 01:02:14,711 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 117 [2023-11-12 01:02:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:14,712 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2023-11-12 01:02:14,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-12 01:02:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2023-11-12 01:02:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-12 01:02:14,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:14,716 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1] [2023-11-12 01:02:14,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:14,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:14,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:14,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -324587796, now seen corresponding path program 1 times [2023-11-12 01:02:14,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:14,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208350677] [2023-11-12 01:02:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:14,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:15,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:15,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767612487] [2023-11-12 01:02:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:15,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:15,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:15,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:15,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:02:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:15,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 2532 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:02:15,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-12 01:02:15,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:02:15,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208350677] [2023-11-12 01:02:15,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:02:15,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767612487] [2023-11-12 01:02:15,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767612487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:15,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:15,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:02:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271550296] [2023-11-12 01:02:15,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:15,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:15,820 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 5 states, 4 states have (on average 13.0) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-12 01:02:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:16,272 INFO L93 Difference]: Finished difference Result 252 states and 323 transitions. [2023-11-12 01:02:16,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:16,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 118 [2023-11-12 01:02:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:16,276 INFO L225 Difference]: With dead ends: 252 [2023-11-12 01:02:16,276 INFO L226 Difference]: Without dead ends: 133 [2023-11-12 01:02:16,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 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 01:02:16,278 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:16,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 548 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:02:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-12 01:02:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-12 01:02:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 73 states have internal predecessors, (82), 43 states have call successors, (43), 16 states have call predecessors, (43), 18 states have return successors, (44), 43 states have call predecessors, (44), 42 states have call successors, (44) [2023-11-12 01:02:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2023-11-12 01:02:16,300 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 118 [2023-11-12 01:02:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:16,300 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2023-11-12 01:02:16,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-12 01:02:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2023-11-12 01:02:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-12 01:02:16,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:16,304 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1] [2023-11-12 01:02:16,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:16,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:16,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:16,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1162274894, now seen corresponding path program 1 times [2023-11-12 01:02:16,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:16,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155190640] [2023-11-12 01:02:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:16,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-12 01:02:18,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:18,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155190640] [2023-11-12 01:02:18,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155190640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:18,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170606260] [2023-11-12 01:02:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:18,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:18,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:18,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:18,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:02:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:18,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 2530 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 01:02:18,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:19,008 INFO L351 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 15 treesize of output 1 [2023-11-12 01:02:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 01:02:19,188 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:02:19,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170606260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:19,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:02:19,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2023-11-12 01:02:19,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648864634] [2023-11-12 01:02:19,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:19,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:02:19,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:02:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:02:19,191 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-12 01:02:21,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:02:24,614 WARN L539 Checker$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 01:02:26,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 01:02:28,671 WARN L539 Checker$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 01:02:30,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:02:32,741 WARN L539 Checker$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 01:02:34,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:02:36,790 WARN L539 Checker$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 01:02:39,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 01:02:41,355 WARN L539 Checker$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 01:02:43,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:02:45,499 WARN L539 Checker$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 01:02:47,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:02:49,588 WARN L539 Checker$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 01:02:51,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:02:53,814 WARN L539 Checker$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 01:02:55,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:02:58,077 WARN L539 Checker$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 01:02:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:58,191 INFO L93 Difference]: Finished difference Result 317 states and 399 transitions. [2023-11-12 01:02:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:02:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) Word has length 126 [2023-11-12 01:02:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:58,197 INFO L225 Difference]: With dead ends: 317 [2023-11-12 01:02:58,200 INFO L226 Difference]: Without dead ends: 205 [2023-11-12 01:02:58,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-12 01:02:58,205 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 99 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 13 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:58,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 657 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 437 Invalid, 18 Unknown, 0 Unchecked, 38.8s Time] [2023-11-12 01:02:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-12 01:02:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2023-11-12 01:02:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 111 states have (on average 1.162162162162162) internal successors, (129), 114 states have internal predecessors, (129), 60 states have call successors, (60), 29 states have call predecessors, (60), 30 states have return successors, (65), 58 states have call predecessors, (65), 59 states have call successors, (65) [2023-11-12 01:02:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2023-11-12 01:02:58,250 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 126 [2023-11-12 01:02:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:58,253 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2023-11-12 01:02:58,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-12 01:02:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2023-11-12 01:02:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-12 01:02:58,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:58,263 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:58,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:58,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:58,475 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:58,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1337993926, now seen corresponding path program 1 times [2023-11-12 01:02:58,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:58,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142668004] [2023-11-12 01:02:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:58,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:02:58,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984926983] [2023-11-12 01:02:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:58,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:58,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:58,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:58,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b56422-3d24-4d87-b5ef-25fffa45f624/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:02:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:59,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 2652 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 01:02:59,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:59,564 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 01:03:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-12 01:03:00,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:03:00,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142668004] [2023-11-12 01:03:00,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:03:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984926983] [2023-11-12 01:03:00,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984926983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:00,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:00,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 01:03:00,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802984584] [2023-11-12 01:03:00,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:00,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:03:00,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:00,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:03:00,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:03:00,035 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand has 9 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28)