./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1d3eb02e894c2acef7732d0e57c112cc2c197f8f03d7c13822f169fbed4dc5e5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:24:07,904 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:24:08,028 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:24:08,036 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:24:08,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:24:08,083 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:24:08,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:24:08,084 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:24:08,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:24:08,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:24:08,091 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:24:08,093 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:24:08,093 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:24:08,095 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:24:08,095 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:24:08,096 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:24:08,096 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:24:08,097 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:24:08,097 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:24:08,099 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:24:08,100 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:24:08,101 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:24:08,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:24:08,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:24:08,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:24:08,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:24:08,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:24:08,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:24:08,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:24:08,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:24:08,114 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:24:08,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:24:08,116 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:24:08,116 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:24:08,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:24:08,117 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:24:08,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:24:08,118 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:24:08,118 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:24:08,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:24:08,119 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:24:08,120 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:24:08,120 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:24:08,121 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:24:08,121 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_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d3eb02e894c2acef7732d0e57c112cc2c197f8f03d7c13822f169fbed4dc5e5 [2023-11-23 21:24:08,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:24:08,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:24:08,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:24:08,491 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:24:08,492 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:24:08,493 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i [2023-11-23 21:24:11,801 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:24:12,541 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:24:12,545 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i [2023-11-23 21:24:12,599 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/data/15316de89/f5d7a1e617a8438585ac14de734fc1b7/FLAG1c55893b8 [2023-11-23 21:24:12,619 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/data/15316de89/f5d7a1e617a8438585ac14de734fc1b7 [2023-11-23 21:24:12,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:24:12,628 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:24:12,631 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:24:12,632 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:24:12,638 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:24:12,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:12" (1/1) ... [2023-11-23 21:24:12,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6811a83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12, skipping insertion in model container [2023-11-23 21:24:12,641 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:12" (1/1) ... [2023-11-23 21:24:12,787 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:24:13,067 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_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4504,4517] [2023-11-23 21:24:13,078 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_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4564,4577] [2023-11-23 21:24:14,342 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,347 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,348 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,351 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,354 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,388 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,390 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,395 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,397 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,407 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,409 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,410 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,410 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:14,955 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:24:14,957 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:24:14,958 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:24:14,960 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:24:14,962 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:24:14,963 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:24:14,964 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:24:14,966 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:24:14,967 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:24:14,968 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:24:15,255 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,256 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,263 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,288 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,409 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,410 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,411 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,411 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,415 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,416 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,418 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,422 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,423 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,423 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,424 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,425 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,425 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,429 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,433 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,433 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,434 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,445 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,446 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,469 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,470 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,471 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:24:15,553 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:24:15,569 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_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4504,4517] [2023-11-23 21:24:15,570 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_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4564,4577] [2023-11-23 21:24:15,649 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,649 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,650 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,651 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,652 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,674 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,674 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,675 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,676 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,677 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,678 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,678 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,679 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,750 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:24:15,751 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:24:15,752 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:24:15,753 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:24:15,757 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:24:15,758 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:24:15,759 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:24:15,760 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:24:15,762 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:24:15,763 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:24:15,843 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,843 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,846 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,854 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,862 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7776-7787] [2023-11-23 21:24:15,903 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,903 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,904 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,904 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,905 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,905 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,906 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,976 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,976 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,976 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,977 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,977 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,977 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,978 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,979 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,979 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,979 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,983 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:15,984 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:16,002 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:16,004 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:16,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:24:16,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:24:16,476 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,477 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,477 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,477 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,477 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,478 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,478 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,478 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,478 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,478 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,479 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,479 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,479 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,479 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,479 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:24:16,487 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:24:16,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16 WrapperNode [2023-11-23 21:24:16,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:24:16,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:24:16,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:24:16,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:24:16,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,657 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,788 INFO L138 Inliner]: procedures = 696, calls = 1906, calls flagged for inlining = 59, calls inlined = 14, statements flattened = 845 [2023-11-23 21:24:16,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:24:16,794 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:24:16,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:24:16,796 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:24:16,808 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,838 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,901 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,921 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:16,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:24:16,994 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:24:16,994 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:24:16,995 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:24:16,996 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (1/1) ... [2023-11-23 21:24:17,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:24:17,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:17,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:24:17,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:24:17,095 INFO L130 BoogieDeclarations]: Found specification of procedure s_swap [2023-11-23 21:24:17,095 INFO L138 BoogieDeclarations]: Found implementation of procedure s_swap [2023-11-23 21:24:17,095 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 21:24:17,096 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 21:24:17,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:24:17,096 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-23 21:24:17,096 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-23 21:24:17,097 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 21:24:17,097 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 21:24:17,097 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 21:24:17,097 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 21:24:17,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:24:17,097 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 21:24:17,098 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 21:24:17,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:24:17,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:24:17,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:24:17,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:24:17,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:24:17,099 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-23 21:24:17,100 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-23 21:24:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:24:17,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:24:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:24:17,100 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:24:17,100 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-23 21:24:17,101 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-23 21:24:17,101 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 21:24:17,101 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 21:24:17,101 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-23 21:24:17,102 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-23 21:24:17,103 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-23 21:24:17,107 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-23 21:24:17,108 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-23 21:24:17,108 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-23 21:24:17,108 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:24:17,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:24:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-23 21:24:17,110 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-23 21:24:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:24:17,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:24:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_down [2023-11-23 21:24:17,115 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_down [2023-11-23 21:24:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:24:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at_ptr [2023-11-23 21:24:17,115 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at_ptr [2023-11-23 21:24:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 21:24:17,116 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 21:24:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 21:24:17,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 21:24:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:24:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-23 21:24:17,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-23 21:24:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_backpointer_index_valid [2023-11-23 21:24:17,117 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_backpointer_index_valid [2023-11-23 21:24:17,117 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:24:17,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:24:17,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:24:17,601 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:24:17,605 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:24:19,211 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:24:19,669 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:24:19,669 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-23 21:24:19,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:19 BoogieIcfgContainer [2023-11-23 21:24:19,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:24:19,677 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:24:19,677 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:24:19,682 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:24:19,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:12" (1/3) ... [2023-11-23 21:24:19,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374fe997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:19, skipping insertion in model container [2023-11-23 21:24:19,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:16" (2/3) ... [2023-11-23 21:24:19,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374fe997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:19, skipping insertion in model container [2023-11-23 21:24:19,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:19" (3/3) ... [2023-11-23 21:24:19,688 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_s_sift_down_harness.i [2023-11-23 21:24:19,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:24:19,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:24:19,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:24:19,824 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;@2b88755, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:24:19,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:24:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 269 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 141 states have internal predecessors, (167), 104 states have call successors, (104), 23 states have call predecessors, (104), 23 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-23 21:24:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-23 21:24:19,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:19,881 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 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] [2023-11-23 21:24:19,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:19,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:19,889 INFO L85 PathProgramCache]: Analyzing trace with hash -670789109, now seen corresponding path program 1 times [2023-11-23 21:24:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:19,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457413460] [2023-11-23 21:24:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:19,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-23 21:24:21,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:21,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457413460] [2023-11-23 21:24:21,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457413460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:21,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060068701] [2023-11-23 21:24:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:21,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:21,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:21,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:24:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:22,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 2286 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:24:22,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-23 21:24:22,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:22,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060068701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:22,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:22,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 21:24:22,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49084750] [2023-11-23 21:24:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:22,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:24:22,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:24:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:24:22,596 INFO L87 Difference]: Start difference. First operand has 269 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 141 states have internal predecessors, (167), 104 states have call successors, (104), 23 states have call predecessors, (104), 23 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-23 21:24:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:23,509 INFO L93 Difference]: Finished difference Result 498 states and 725 transitions. [2023-11-23 21:24:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:23,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 121 [2023-11-23 21:24:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:23,542 INFO L225 Difference]: With dead ends: 498 [2023-11-23 21:24:23,543 INFO L226 Difference]: Without dead ends: 269 [2023-11-23 21:24:23,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:24:23,565 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 34 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:23,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1190 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:24:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-23 21:24:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-11-23 21:24:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 140 states have (on average 1.1714285714285715) internal successors, (164), 142 states have internal predecessors, (164), 104 states have call successors, (104), 23 states have call predecessors, (104), 24 states have return successors, (107), 103 states have call predecessors, (107), 103 states have call successors, (107) [2023-11-23 21:24:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2023-11-23 21:24:23,683 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 121 [2023-11-23 21:24:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:23,684 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2023-11-23 21:24:23,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-23 21:24:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2023-11-23 21:24:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-23 21:24:23,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:23,692 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 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] [2023-11-23 21:24:23,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:23,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:23,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:23,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:23,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1753230441, now seen corresponding path program 1 times [2023-11-23 21:24:23,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:23,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535644860] [2023-11-23 21:24:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:23,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2023-11-23 21:24:24,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:24,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535644860] [2023-11-23 21:24:24,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535644860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:24,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858290111] [2023-11-23 21:24:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:24,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:24,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:24,814 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:24,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:24:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:25,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 2336 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:24:25,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-23 21:24:25,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:25,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858290111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:25,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:25,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-23 21:24:25,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444765787] [2023-11-23 21:24:25,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:25,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:24:25,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:25,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:24:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:24:25,718 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-23 21:24:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:26,924 INFO L93 Difference]: Finished difference Result 509 states and 724 transitions. [2023-11-23 21:24:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:24:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 129 [2023-11-23 21:24:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:26,932 INFO L225 Difference]: With dead ends: 509 [2023-11-23 21:24:26,932 INFO L226 Difference]: Without dead ends: 282 [2023-11-23 21:24:26,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:24:26,938 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 48 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:26,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1744 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:24:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-23 21:24:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2023-11-23 21:24:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 106 states have call successors, (106), 23 states have call predecessors, (106), 25 states have return successors, (120), 106 states have call predecessors, (120), 105 states have call successors, (120) [2023-11-23 21:24:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-23 21:24:27,010 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 129 [2023-11-23 21:24:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:27,011 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-23 21:24:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-23 21:24:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-23 21:24:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:24:27,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:27,018 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:27,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:27,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:27,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:27,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1797104726, now seen corresponding path program 1 times [2023-11-23 21:24:27,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:27,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439292458] [2023-11-23 21:24:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:27,379 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:27,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914738307] [2023-11-23 21:24:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:27,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:27,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:27,382 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:27,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:24:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:28,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 2468 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:24:28,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-23 21:24:28,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:28,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439292458] [2023-11-23 21:24:28,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:28,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914738307] [2023-11-23 21:24:28,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914738307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:28,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:28,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:24:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774809934] [2023-11-23 21:24:28,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:24:28,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:24:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:24:28,245 INFO L87 Difference]: Start difference. First operand 280 states and 400 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-23 21:24:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:29,106 INFO L93 Difference]: Finished difference Result 524 states and 756 transitions. [2023-11-23 21:24:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:24:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 138 [2023-11-23 21:24:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:29,111 INFO L225 Difference]: With dead ends: 524 [2023-11-23 21:24:29,111 INFO L226 Difference]: Without dead ends: 286 [2023-11-23 21:24:29,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:24:29,114 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 41 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:29,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1476 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:24:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-23 21:24:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2023-11-23 21:24:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 106 states have call successors, (106), 23 states have call predecessors, (106), 25 states have return successors, (120), 106 states have call predecessors, (120), 105 states have call successors, (120) [2023-11-23 21:24:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-23 21:24:29,177 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 138 [2023-11-23 21:24:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:29,182 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-23 21:24:29,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-23 21:24:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-23 21:24:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 21:24:29,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:29,197 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 4, 4, 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, 1] [2023-11-23 21:24:29,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:29,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:29,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:29,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:29,426 INFO L85 PathProgramCache]: Analyzing trace with hash 371580142, now seen corresponding path program 1 times [2023-11-23 21:24:29,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:29,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301032810] [2023-11-23 21:24:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:29,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:29,565 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:29,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391318281] [2023-11-23 21:24:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:29,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:29,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:29,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:29,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:24:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:30,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:24:30,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-23 21:24:30,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:30,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301032810] [2023-11-23 21:24:30,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:30,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391318281] [2023-11-23 21:24:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391318281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:30,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:30,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:24:30,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073580534] [2023-11-23 21:24:30,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:30,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:24:30,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:24:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:24:30,522 INFO L87 Difference]: Start difference. First operand 280 states and 400 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-11-23 21:24:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:31,833 INFO L93 Difference]: Finished difference Result 526 states and 757 transitions. [2023-11-23 21:24:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:24:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) Word has length 146 [2023-11-23 21:24:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:31,839 INFO L225 Difference]: With dead ends: 526 [2023-11-23 21:24:31,840 INFO L226 Difference]: Without dead ends: 288 [2023-11-23 21:24:31,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:24:31,843 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 64 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:31,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1993 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:24:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-23 21:24:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2023-11-23 21:24:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 106 states have call successors, (106), 23 states have call predecessors, (106), 25 states have return successors, (120), 106 states have call predecessors, (120), 105 states have call successors, (120) [2023-11-23 21:24:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-23 21:24:31,894 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 146 [2023-11-23 21:24:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:31,895 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-23 21:24:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-11-23 21:24:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-23 21:24:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-23 21:24:31,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:31,903 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:31,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:32,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:32,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:32,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:32,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1493400707, now seen corresponding path program 2 times [2023-11-23 21:24:32,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:32,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847596011] [2023-11-23 21:24:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:32,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:32,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:32,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293715255] [2023-11-23 21:24:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:24:32,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:32,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:32,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:24:32,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:24:32,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:32,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:24:32,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-23 21:24:32,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:32,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:32,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847596011] [2023-11-23 21:24:32,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:32,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293715255] [2023-11-23 21:24:32,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293715255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:32,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:32,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:24:32,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465289775] [2023-11-23 21:24:32,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:32,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:24:32,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:24:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:32,986 INFO L87 Difference]: Start difference. First operand 280 states and 400 transitions. Second operand has 5 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-23 21:24:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:33,670 INFO L93 Difference]: Finished difference Result 484 states and 706 transitions. [2023-11-23 21:24:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:33,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 155 [2023-11-23 21:24:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:33,675 INFO L225 Difference]: With dead ends: 484 [2023-11-23 21:24:33,675 INFO L226 Difference]: Without dead ends: 280 [2023-11-23 21:24:33,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:33,679 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 0 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:33,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1205 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:24:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-23 21:24:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2023-11-23 21:24:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 106 states have call successors, (106), 23 states have call predecessors, (106), 25 states have return successors, (119), 106 states have call predecessors, (119), 105 states have call successors, (119) [2023-11-23 21:24:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 399 transitions. [2023-11-23 21:24:33,707 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 399 transitions. Word has length 155 [2023-11-23 21:24:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:33,708 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 399 transitions. [2023-11-23 21:24:33,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-23 21:24:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 399 transitions. [2023-11-23 21:24:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-23 21:24:33,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:33,712 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-23 21:24:33,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:33,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:33,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:33,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:33,931 INFO L85 PathProgramCache]: Analyzing trace with hash -499179154, now seen corresponding path program 3 times [2023-11-23 21:24:33,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:33,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565752578] [2023-11-23 21:24:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:33,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:34,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:24:34,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932022288] [2023-11-23 21:24:34,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:24:34,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:34,133 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:34,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d851fdcc-38bc-4d69-a8c4-6bb8d85e8748/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:24:34,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:24:34,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:24:34,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 21:24:34,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-23 21:24:35,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-23 21:24:35,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:35,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565752578] [2023-11-23 21:24:35,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:24:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932022288] [2023-11-23 21:24:35,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932022288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280350409] [2023-11-23 21:24:35,624 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2023-11-23 21:24:35,624 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:35,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:35,637 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:35,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs