./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_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_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/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_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/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_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/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 355537246d5dfb9690a92cc5d0cbf014736bcc62122f38f5559ea0fbf5331d1c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:51,460 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:51,534 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:32:51,540 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:51,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:51,571 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:51,572 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:51,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:51,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:51,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:51,575 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:51,576 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:51,577 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:51,577 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:51,578 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:51,579 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:51,579 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:51,580 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:51,581 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:51,581 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:51,582 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:51,583 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:51,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:51,584 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:51,585 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:51,586 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:51,586 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:51,587 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:51,587 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:51,588 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:51,588 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:51,589 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:51,589 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:51,590 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:51,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:51,590 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:51,591 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:51,591 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:51,591 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:51,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:51,592 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:51,593 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:51,593 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:51,593 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:51,594 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_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 355537246d5dfb9690a92cc5d0cbf014736bcc62122f38f5559ea0fbf5331d1c [2023-11-23 20:32:51,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:51,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:51,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:51,966 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:51,967 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:51,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i [2023-11-23 20:32:54,971 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:55,572 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:55,573 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i [2023-11-23 20:32:55,616 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/data/b8089252c/24fd3211749244c48b293f86ae9e7f59/FLAG4018870b5 [2023-11-23 20:32:55,635 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/data/b8089252c/24fd3211749244c48b293f86ae9e7f59 [2023-11-23 20:32:55,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:55,645 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:55,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:55,649 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:55,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:55,656 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f603bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55, skipping insertion in model container [2023-11-23 20:32:55,657 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,815 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:56,105 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_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i[4506,4519] [2023-11-23 20:32:56,115 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_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i[4566,4579] [2023-11-23 20:32:57,308 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,310 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,311 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,313 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,317 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,335 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,337 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,340 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,341 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,344 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,345 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,346 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,347 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:57,921 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:32:57,922 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:32:57,924 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:32:57,925 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:32:57,927 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:32:57,928 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:32:57,929 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:32:57,929 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:32:57,930 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:32:57,931 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:32:58,175 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,175 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,182 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,190 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,277 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,278 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,278 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,279 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,279 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,280 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,281 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,282 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,282 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,282 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,283 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,283 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,284 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,287 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,288 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,289 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,289 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,294 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,294 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,304 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,305 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,306 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:58,422 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:58,473 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_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i[4506,4519] [2023-11-23 20:32:58,476 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_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_either_harness.i[4566,4579] [2023-11-23 20:32:58,590 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,590 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,591 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,591 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,592 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,599 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,599 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,600 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,601 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,602 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,602 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,603 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,603 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,668 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:32:58,669 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:32:58,670 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:32:58,674 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:32:58,675 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:32:58,675 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:32:58,676 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:32:58,676 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:32:58,677 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:32:58,678 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:32:58,746 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,747 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,749 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,756 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,767 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7776-7787] [2023-11-23 20:32:58,803 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,807 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,807 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,808 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,808 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,808 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,809 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,810 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,810 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,810 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,811 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,811 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,811 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,812 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,813 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,813 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,813 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,816 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,816 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,827 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,828 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,830 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:58,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:59,190 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,190 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,191 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,191 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,192 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,192 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,192 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,192 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,192 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,192 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,193 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,193 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,193 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,193 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,193 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:59,202 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:59,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59 WrapperNode [2023-11-23 20:32:59,204 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:59,206 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:59,206 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:59,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:59,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,437 INFO L138 Inliner]: procedures = 696, calls = 1888, calls flagged for inlining = 60, calls inlined = 15, statements flattened = 925 [2023-11-23 20:32:59,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:59,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:59,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:59,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:59,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,539 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,548 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,602 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:59,603 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:59,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:59,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:59,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (1/1) ... [2023-11-23 20:32:59,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:59,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:59,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:59,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:59,687 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_either [2023-11-23 20:32:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_either [2023-11-23 20:32:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure s_swap [2023-11-23 20:32:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure s_swap [2023-11-23 20:32:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 20:32:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 20:32:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:32:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-23 20:32:59,689 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-23 20:32:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 20:32:59,689 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 20:32:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 20:32:59,690 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 20:32:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_up [2023-11-23 20:32:59,690 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_up [2023-11-23 20:32:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:32:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 20:32:59,691 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 20:32:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:32:59,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:32:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:32:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure my_abort [2023-11-23 20:32:59,693 INFO L138 BoogieDeclarations]: Found implementation of procedure my_abort [2023-11-23 20:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-23 20:32:59,693 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-23 20:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:59,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:59,694 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 20:32:59,694 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 20:32:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 20:32:59,698 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 20:32:59,698 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-23 20:32:59,699 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-23 20:32:59,699 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-23 20:32:59,699 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-23 20:32:59,699 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-23 20:32:59,700 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-23 20:32:59,700 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:32:59,700 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:32:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-23 20:32:59,706 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-23 20:32:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:32:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:32:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:32:59,707 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at_ptr [2023-11-23 20:32:59,707 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at_ptr [2023-11-23 20:32:59,707 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 20:32:59,707 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 20:32:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 20:32:59,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 20:32:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:32:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-23 20:32:59,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-23 20:32:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_backpointer_index_valid [2023-11-23 20:32:59,709 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_backpointer_index_valid [2023-11-23 20:32:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 20:32:59,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 20:32:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:00,095 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:00,098 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:01,300 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:01,651 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:01,651 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 20:33:01,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:01 BoogieIcfgContainer [2023-11-23 20:33:01,654 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:01,657 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:01,657 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:01,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:01,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:55" (1/3) ... [2023-11-23 20:33:01,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa91679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:01, skipping insertion in model container [2023-11-23 20:33:01,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:59" (2/3) ... [2023-11-23 20:33:01,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa91679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:01, skipping insertion in model container [2023-11-23 20:33:01,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:01" (3/3) ... [2023-11-23 20:33:01,665 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_s_sift_either_harness.i [2023-11-23 20:33:01,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:01,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:33:01,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:01,753 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;@6f19d65d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:01,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:33:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 291 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 154 states have internal predecessors, (185), 113 states have call successors, (113), 24 states have call predecessors, (113), 24 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-11-23 20:33:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 20:33:01,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:01,775 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 3, 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] [2023-11-23 20:33:01,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:01,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash 459333913, now seen corresponding path program 1 times [2023-11-23 20:33:01,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:01,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135458701] [2023-11-23 20:33:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:01,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 20:33:02,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:02,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135458701] [2023-11-23 20:33:02,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135458701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:02,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518810419] [2023-11-23 20:33:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:02,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:02,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:02,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:02,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:03,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 2130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:33:03,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-23 20:33:03,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518810419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:03,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 20:33:03,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127416669] [2023-11-23 20:33:03,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:03,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:03,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:03,534 INFO L87 Difference]: Start difference. First operand has 291 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 154 states have internal predecessors, (185), 113 states have call successors, (113), 24 states have call predecessors, (113), 24 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 20:33:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:04,001 INFO L93 Difference]: Finished difference Result 530 states and 788 transitions. [2023-11-23 20:33:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:04,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2023-11-23 20:33:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:04,027 INFO L225 Difference]: With dead ends: 530 [2023-11-23 20:33:04,027 INFO L226 Difference]: Without dead ends: 289 [2023-11-23 20:33:04,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:04,048 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 0 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:04,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 725 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:33:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-23 20:33:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-23 20:33:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 151 states have (on average 1.1986754966887416) internal successors, (181), 153 states have internal predecessors, (181), 113 states have call successors, (113), 24 states have call predecessors, (113), 23 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-23 20:33:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 405 transitions. [2023-11-23 20:33:04,160 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 405 transitions. Word has length 80 [2023-11-23 20:33:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:04,162 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 405 transitions. [2023-11-23 20:33:04,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 20:33:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 405 transitions. [2023-11-23 20:33:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 20:33:04,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:04,170 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 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] [2023-11-23 20:33:04,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:04,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 20:33:04,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:04,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1355776442, now seen corresponding path program 1 times [2023-11-23 20:33:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:04,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440026601] [2023-11-23 20:33:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:04,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-23 20:33:05,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:05,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440026601] [2023-11-23 20:33:05,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440026601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:05,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120729322] [2023-11-23 20:33:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:05,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:05,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:05,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:33:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:05,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 2236 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:33:05,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 20:33:05,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:05,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120729322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:05,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:05,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 20:33:05,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093308941] [2023-11-23 20:33:05,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:05,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:05,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:05,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:05,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:05,780 INFO L87 Difference]: Start difference. First operand 289 states and 405 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 20:33:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:06,423 INFO L93 Difference]: Finished difference Result 550 states and 781 transitions. [2023-11-23 20:33:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 95 [2023-11-23 20:33:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:06,429 INFO L225 Difference]: With dead ends: 550 [2023-11-23 20:33:06,429 INFO L226 Difference]: Without dead ends: 291 [2023-11-23 20:33:06,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:06,432 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 32 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:06,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1324 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:33:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-23 20:33:06,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2023-11-23 20:33:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 113 states have call successors, (113), 24 states have call predecessors, (113), 24 states have return successors, (119), 111 states have call predecessors, (119), 111 states have call successors, (119) [2023-11-23 20:33:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 414 transitions. [2023-11-23 20:33:06,463 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 414 transitions. Word has length 95 [2023-11-23 20:33:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:06,463 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 414 transitions. [2023-11-23 20:33:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 20:33:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 414 transitions. [2023-11-23 20:33:06,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 20:33:06,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:06,470 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 3, 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] [2023-11-23 20:33:06,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:06,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:06,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:06,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash 142489185, now seen corresponding path program 1 times [2023-11-23 20:33:06,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:06,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213467163] [2023-11-23 20:33:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:06,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-23 20:33:07,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213467163] [2023-11-23 20:33:07,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213467163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:07,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715415338] [2023-11-23 20:33:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:07,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:07,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:07,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:07,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:33:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:07,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 2286 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:33:07,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 20:33:08,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:08,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715415338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:08,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:08,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-23 20:33:08,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340703194] [2023-11-23 20:33:08,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:08,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:33:08,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:08,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:33:08,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-23 20:33:08,048 INFO L87 Difference]: Start difference. First operand 291 states and 414 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 20:33:09,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:09,363 INFO L93 Difference]: Finished difference Result 565 states and 824 transitions. [2023-11-23 20:33:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:33:09,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 103 [2023-11-23 20:33:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:09,368 INFO L225 Difference]: With dead ends: 565 [2023-11-23 20:33:09,369 INFO L226 Difference]: Without dead ends: 304 [2023-11-23 20:33:09,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-23 20:33:09,372 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 45 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:09,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1953 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 20:33:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-23 20:33:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 302. [2023-11-23 20:33:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 160 states have (on average 1.2) internal successors, (192), 163 states have internal predecessors, (192), 115 states have call successors, (115), 24 states have call predecessors, (115), 25 states have return successors, (132), 114 states have call predecessors, (132), 113 states have call successors, (132) [2023-11-23 20:33:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 439 transitions. [2023-11-23 20:33:09,412 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 439 transitions. Word has length 103 [2023-11-23 20:33:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:09,413 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 439 transitions. [2023-11-23 20:33:09,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 20:33:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 439 transitions. [2023-11-23 20:33:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-23 20:33:09,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:09,417 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:09,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:09,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:09,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:09,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1876231415, now seen corresponding path program 1 times [2023-11-23 20:33:09,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:09,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025328033] [2023-11-23 20:33:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:09,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:09,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:09,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367152655] [2023-11-23 20:33:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:09,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:09,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:09,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:09,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:33:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:10,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:33:10,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 20:33:10,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:10,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:10,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025328033] [2023-11-23 20:33:10,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:10,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367152655] [2023-11-23 20:33:10,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367152655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:10,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:10,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:33:10,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310906920] [2023-11-23 20:33:10,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:10,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:10,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:10,524 INFO L87 Difference]: Start difference. First operand 302 states and 439 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-23 20:33:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:11,311 INFO L93 Difference]: Finished difference Result 580 states and 860 transitions. [2023-11-23 20:33:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:33:11,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 112 [2023-11-23 20:33:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:11,315 INFO L225 Difference]: With dead ends: 580 [2023-11-23 20:33:11,316 INFO L226 Difference]: Without dead ends: 308 [2023-11-23 20:33:11,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:11,319 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 39 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:11,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1643 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:33:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-23 20:33:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 302. [2023-11-23 20:33:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 160 states have (on average 1.2) internal successors, (192), 163 states have internal predecessors, (192), 115 states have call successors, (115), 24 states have call predecessors, (115), 25 states have return successors, (132), 114 states have call predecessors, (132), 113 states have call successors, (132) [2023-11-23 20:33:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 439 transitions. [2023-11-23 20:33:11,348 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 439 transitions. Word has length 112 [2023-11-23 20:33:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:11,349 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 439 transitions. [2023-11-23 20:33:11,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-23 20:33:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 439 transitions. [2023-11-23 20:33:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-23 20:33:11,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:11,352 INFO L195 NwaCegarLoop]: trace histogram [9, 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] [2023-11-23 20:33:11,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:11,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:11,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:11,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash -775022291, now seen corresponding path program 1 times [2023-11-23 20:33:11,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:11,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533499217] [2023-11-23 20:33:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:11,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:11,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:11,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712960625] [2023-11-23 20:33:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:11,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:11,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:11,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:11,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:33:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:12,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 2472 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:33:12,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-23 20:33:12,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:12,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533499217] [2023-11-23 20:33:12,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:12,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712960625] [2023-11-23 20:33:12,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712960625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:12,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:12,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:33:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815237240] [2023-11-23 20:33:12,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:12,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:33:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:12,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:33:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:12,481 INFO L87 Difference]: Start difference. First operand 302 states and 439 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 20:33:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:13,870 INFO L93 Difference]: Finished difference Result 590 states and 874 transitions. [2023-11-23 20:33:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:13,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 120 [2023-11-23 20:33:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:13,875 INFO L225 Difference]: With dead ends: 590 [2023-11-23 20:33:13,875 INFO L226 Difference]: Without dead ends: 318 [2023-11-23 20:33:13,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 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 20:33:13,878 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 53 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:13,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 2237 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 20:33:13,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-23 20:33:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2023-11-23 20:33:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 160 states have (on average 1.2) internal successors, (192), 163 states have internal predecessors, (192), 115 states have call successors, (115), 24 states have call predecessors, (115), 25 states have return successors, (132), 114 states have call predecessors, (132), 113 states have call successors, (132) [2023-11-23 20:33:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 439 transitions. [2023-11-23 20:33:13,908 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 439 transitions. Word has length 120 [2023-11-23 20:33:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:13,910 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 439 transitions. [2023-11-23 20:33:13,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 20:33:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 439 transitions. [2023-11-23 20:33:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-23 20:33:13,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:13,917 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:33:13,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:14,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:14,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:14,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:14,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1165182311, now seen corresponding path program 1 times [2023-11-23 20:33:14,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:14,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889082320] [2023-11-23 20:33:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:14,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:14,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168801096] [2023-11-23 20:33:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:14,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:14,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:14,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:14,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:33:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:14,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:33:14,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-23 20:33:14,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:14,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:14,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889082320] [2023-11-23 20:33:14,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:14,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168801096] [2023-11-23 20:33:14,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168801096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:14,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:14,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:33:14,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319930923] [2023-11-23 20:33:14,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:14,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:33:14,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:33:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:33:14,972 INFO L87 Difference]: Start difference. First operand 302 states and 439 transitions. Second operand has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 20:33:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:15,801 INFO L93 Difference]: Finished difference Result 550 states and 813 transitions. [2023-11-23 20:33:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:33:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 129 [2023-11-23 20:33:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:15,805 INFO L225 Difference]: With dead ends: 550 [2023-11-23 20:33:15,805 INFO L226 Difference]: Without dead ends: 304 [2023-11-23 20:33:15,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:15,808 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 78 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:15,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1932 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:33:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-23 20:33:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2023-11-23 20:33:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 161 states have (on average 1.1987577639751552) internal successors, (193), 165 states have internal predecessors, (193), 115 states have call successors, (115), 24 states have call predecessors, (115), 26 states have return successors, (138), 114 states have call predecessors, (138), 113 states have call successors, (138) [2023-11-23 20:33:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 446 transitions. [2023-11-23 20:33:15,834 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 446 transitions. Word has length 129 [2023-11-23 20:33:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:15,835 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 446 transitions. [2023-11-23 20:33:15,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 20:33:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 446 transitions. [2023-11-23 20:33:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 20:33:15,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:15,838 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:33:15,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:16,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:33:16,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:16,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:16,058 INFO L85 PathProgramCache]: Analyzing trace with hash 363139714, now seen corresponding path program 1 times [2023-11-23 20:33:16,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:16,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452270281] [2023-11-23 20:33:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:16,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:16,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:16,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365475849] [2023-11-23 20:33:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:16,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:16,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:16,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:16,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:33:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:16,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:33:16,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 20:33:17,042 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:17,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:17,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452270281] [2023-11-23 20:33:17,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:17,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365475849] [2023-11-23 20:33:17,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365475849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:17,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:17,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 20:33:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645762616] [2023-11-23 20:33:17,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:17,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:33:17,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:33:17,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:17,046 INFO L87 Difference]: Start difference. First operand 304 states and 446 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 5 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-23 20:33:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:18,270 INFO L93 Difference]: Finished difference Result 560 states and 835 transitions. [2023-11-23 20:33:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:18,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 5 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) Word has length 137 [2023-11-23 20:33:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:18,274 INFO L225 Difference]: With dead ends: 560 [2023-11-23 20:33:18,274 INFO L226 Difference]: Without dead ends: 312 [2023-11-23 20:33:18,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:33:18,277 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 92 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:18,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 2531 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 20:33:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-23 20:33:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2023-11-23 20:33:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 169 states have internal predecessors, (199), 116 states have call successors, (116), 24 states have call predecessors, (116), 26 states have return successors, (139), 116 states have call predecessors, (139), 114 states have call successors, (139) [2023-11-23 20:33:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 454 transitions. [2023-11-23 20:33:18,307 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 454 transitions. Word has length 137 [2023-11-23 20:33:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:18,313 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 454 transitions. [2023-11-23 20:33:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 5 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-23 20:33:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 454 transitions. [2023-11-23 20:33:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 20:33:18,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:18,316 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:18,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:18,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:18,544 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:18,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 515618902, now seen corresponding path program 1 times [2023-11-23 20:33:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:18,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836866067] [2023-11-23 20:33:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:18,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:18,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165315997] [2023-11-23 20:33:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:18,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:18,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:18,707 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:18,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:33:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:19,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 2786 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:33:19,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-23 20:33:19,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:19,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:19,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836866067] [2023-11-23 20:33:19,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:19,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165315997] [2023-11-23 20:33:19,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165315997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:19,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:19,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:33:19,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049846721] [2023-11-23 20:33:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:19,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:33:19,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:33:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:19,599 INFO L87 Difference]: Start difference. First operand 310 states and 454 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-23 20:33:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:20,511 INFO L93 Difference]: Finished difference Result 570 states and 852 transitions. [2023-11-23 20:33:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:20,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) Word has length 146 [2023-11-23 20:33:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:20,516 INFO L225 Difference]: With dead ends: 570 [2023-11-23 20:33:20,517 INFO L226 Difference]: Without dead ends: 316 [2023-11-23 20:33:20,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:33:20,520 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 85 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:20,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 2243 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:33:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-23 20:33:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2023-11-23 20:33:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 169 states have internal predecessors, (199), 116 states have call successors, (116), 24 states have call predecessors, (116), 26 states have return successors, (139), 116 states have call predecessors, (139), 114 states have call successors, (139) [2023-11-23 20:33:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 454 transitions. [2023-11-23 20:33:20,545 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 454 transitions. Word has length 146 [2023-11-23 20:33:20,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:20,546 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 454 transitions. [2023-11-23 20:33:20,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (22), 4 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-23 20:33:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 454 transitions. [2023-11-23 20:33:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 20:33:20,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:20,549 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:33:20,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:20,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:20,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:20,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash 788034120, now seen corresponding path program 2 times [2023-11-23 20:33:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:20,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862358848] [2023-11-23 20:33:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:20,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:20,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542129106] [2023-11-23 20:33:20,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:33:20,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:20,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:20,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:20,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:33:22,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 20:33:22,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:33:22,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 20:33:22,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-23 20:33:22,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:22,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862358848] [2023-11-23 20:33:22,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:22,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542129106] [2023-11-23 20:33:22,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542129106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:22,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:22,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:33:22,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706518685] [2023-11-23 20:33:22,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:22,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:22,145 INFO L87 Difference]: Start difference. First operand 310 states and 454 transitions. Second operand has 5 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:33:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:22,715 INFO L93 Difference]: Finished difference Result 557 states and 826 transitions. [2023-11-23 20:33:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:22,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 163 [2023-11-23 20:33:22,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:22,719 INFO L225 Difference]: With dead ends: 557 [2023-11-23 20:33:22,719 INFO L226 Difference]: Without dead ends: 312 [2023-11-23 20:33:22,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 159 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 20:33:22,723 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 0 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:22,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1312 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:33:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-23 20:33:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2023-11-23 20:33:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 167 states have (on average 1.1976047904191616) internal successors, (200), 171 states have internal predecessors, (200), 116 states have call successors, (116), 24 states have call predecessors, (116), 27 states have return successors, (144), 116 states have call predecessors, (144), 114 states have call successors, (144) [2023-11-23 20:33:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 460 transitions. [2023-11-23 20:33:22,751 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 460 transitions. Word has length 163 [2023-11-23 20:33:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:22,751 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 460 transitions. [2023-11-23 20:33:22,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:33:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 460 transitions. [2023-11-23 20:33:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-23 20:33:22,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:22,755 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2023-11-23 20:33:22,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 20:33:22,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:22,968 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:22,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:22,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1129457533, now seen corresponding path program 2 times [2023-11-23 20:33:22,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:22,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505799492] [2023-11-23 20:33:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:22,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:23,097 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:23,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330449480] [2023-11-23 20:33:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:33:23,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:23,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:23,099 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:23,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03a7dcca-bbcb-492e-88f9-ca3c0adc6aed/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 20:33:24,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 20:33:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:33:24,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 20:33:24,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-11-23 20:33:24,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-23 20:33:24,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505799492] [2023-11-23 20:33:24,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330449480] [2023-11-23 20:33:24,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330449480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886008064] [2023-11-23 20:33:24,733 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-11-23 20:33:24,733 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:24,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:24,744 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:24,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs