./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh --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 7608d8aa64807891206ad38b93db31434f261f46ffbbb3a8b8a4940e4ab5ce81 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:21:44,452 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:21:44,511 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:21:44,516 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:21:44,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:21:44,537 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:21:44,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:21:44,538 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:21:44,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:21:44,539 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:21:44,540 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:21:44,540 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:21:44,541 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:21:44,541 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:21:44,542 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:21:44,542 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:21:44,543 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:21:44,543 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:21:44,544 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:21:44,544 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:21:44,545 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:21:44,548 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:21:44,549 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:21:44,549 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:21:44,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:21:44,550 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:21:44,550 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:21:44,551 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:21:44,551 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:21:44,552 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:21:44,552 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:21:44,552 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:21:44,553 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:21:44,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:21:44,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:21:44,553 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:21:44,553 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:21:44,554 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:21:44,554 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:21:44,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:21:44,554 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:21:44,554 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:21:44,555 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:21:44,555 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:21:44,555 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_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7608d8aa64807891206ad38b93db31434f261f46ffbbb3a8b8a4940e4ab5ce81 [2023-12-02 17:21:44,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:21:44,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:21:44,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:21:44,771 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:21:44,772 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:21:44,773 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i [2023-12-02 17:21:47,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:21:47,896 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:21:47,896 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i [2023-12-02 17:21:47,930 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/data/f2af17b4b/a5a8dd0228874d6d96ff11cc123d0a2b/FLAG08aa7c919 [2023-12-02 17:21:47,944 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/data/f2af17b4b/a5a8dd0228874d6d96ff11cc123d0a2b [2023-12-02 17:21:47,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:21:47,948 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:21:47,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:21:47,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:21:47,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:21:47,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:21:47" (1/1) ... [2023-12-02 17:21:47,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530122ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:47, skipping insertion in model container [2023-12-02 17:21:47,954 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:21:47" (1/1) ... [2023-12-02 17:21:48,073 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:21:48,310 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_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4494,4507] [2023-12-02 17:21:48,317 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_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4554,4567] [2023-12-02 17:21:49,419 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,419 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,420 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,421 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,422 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,435 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,436 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,438 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,438 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,440 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,441 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:49,853 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 17:21:49,854 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 17:21:49,855 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 17:21:49,856 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 17:21:49,858 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 17:21:49,859 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 17:21:49,859 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 17:21:49,860 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 17:21:49,861 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 17:21:49,861 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 17:21:50,304 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,304 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,325 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,327 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,332 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,333 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,345 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,346 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,346 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,347 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,347 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,347 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,347 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:21:50,408 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:21:50,420 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_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4494,4507] [2023-12-02 17:21:50,420 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_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4554,4567] [2023-12-02 17:21:50,488 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,488 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,489 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,489 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,489 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,495 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,496 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,497 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,497 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,498 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,499 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,499 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,499 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,524 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 17:21:50,525 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 17:21:50,525 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 17:21:50,526 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 17:21:50,527 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 17:21:50,527 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 17:21:50,528 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 17:21:50,528 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 17:21:50,528 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 17:21:50,529 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 17:21:50,557 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-12-02 17:21:50,625 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,625 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,632 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,632 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,634 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,635 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,642 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,643 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,643 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,643 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,643 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,644 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,644 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:21:50,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:21:50,960 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,960 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,960 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,961 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,961 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,961 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,961 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,975 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:21:50,981 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:21:50,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50 WrapperNode [2023-12-02 17:21:50,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:21:50,982 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:21:50,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:21:50,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:21:50,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,073 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,138 INFO L138 Inliner]: procedures = 772, calls = 2461, calls flagged for inlining = 66, calls inlined = 11, statements flattened = 749 [2023-12-02 17:21:51,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:21:51,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:21:51,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:21:51,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:21:51,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,159 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,159 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,201 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,207 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,218 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,236 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:21:51,237 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:21:51,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:21:51,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:21:51,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (1/1) ... [2023-12-02 17:21:51,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:21:51,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:51,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:21:51,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:21:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-12-02 17:21:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 17:21:51,297 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 17:21:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:21:51,297 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-12-02 17:21:51,297 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-12-02 17:21:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:21:51,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:21:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-12-02 17:21:51,298 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-12-02 17:21:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 17:21:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:21:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 17:21:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:21:51,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:21:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 17:21:51,299 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 17:21:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-12-02 17:21:51,299 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-12-02 17:21:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 17:21:51,299 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 17:21:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:21:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-12-02 17:21:51,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-12-02 17:21:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 17:21:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 17:21:51,300 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 17:21:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:21:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-12-02 17:21:51,300 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-12-02 17:21:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:21:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-12-02 17:21:51,300 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-12-02 17:21:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 17:21:51,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 17:21:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:21:51,301 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:21:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-12-02 17:21:51,301 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-12-02 17:21:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-12-02 17:21:51,301 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-12-02 17:21:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 17:21:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-12-02 17:21:51,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-12-02 17:21:51,302 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-12-02 17:21:51,302 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-12-02 17:21:51,302 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-12-02 17:21:51,302 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-12-02 17:21:51,302 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_delete [2023-12-02 17:21:51,302 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_delete [2023-12-02 17:21:51,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:21:51,573 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:21:51,575 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:21:51,768 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-12-02 17:21:51,769 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-12-02 17:21:52,537 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:21:52,842 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:21:52,842 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-02 17:21:52,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:21:52 BoogieIcfgContainer [2023-12-02 17:21:52,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:21:52,846 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:21:52,846 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:21:52,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:21:52,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:21:47" (1/3) ... [2023-12-02 17:21:52,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d14aea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:21:52, skipping insertion in model container [2023-12-02 17:21:52,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:50" (2/3) ... [2023-12-02 17:21:52,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d14aea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:21:52, skipping insertion in model container [2023-12-02 17:21:52,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:21:52" (3/3) ... [2023-12-02 17:21:52,852 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_delete_harness.i [2023-12-02 17:21:52,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:21:52,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:21:52,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:21:52,929 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;@789c2b12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:21:52,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:21:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-12-02 17:21:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 17:21:52,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:52,954 INFO L195 NwaCegarLoop]: trace histogram [19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:52,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:52,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2105179692, now seen corresponding path program 1 times [2023-12-02 17:21:52,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:52,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422909286] [2023-12-02 17:21:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:53,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:21:53,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796646098] [2023-12-02 17:21:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:53,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:53,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:53,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:53,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:21:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:53,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 2489 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:21:53,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-12-02 17:21:54,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:21:54,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:54,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422909286] [2023-12-02 17:21:54,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:21:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796646098] [2023-12-02 17:21:54,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796646098] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:54,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:54,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:21:54,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017768351] [2023-12-02 17:21:54,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:54,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:21:54,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:21:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:21:54,106 INFO L87 Difference]: Start difference. First operand has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2023-12-02 17:21:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:54,477 INFO L93 Difference]: Finished difference Result 304 states and 413 transitions. [2023-12-02 17:21:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:21:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 146 [2023-12-02 17:21:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:54,488 INFO L225 Difference]: With dead ends: 304 [2023-12-02 17:21:54,489 INFO L226 Difference]: Without dead ends: 169 [2023-12-02 17:21:54,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:21:54,496 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:54,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 736 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:21:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-02 17:21:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-12-02 17:21:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 95 states have internal predecessors, (109), 54 states have call successors, (54), 19 states have call predecessors, (54), 20 states have return successors, (54), 54 states have call predecessors, (54), 53 states have call successors, (54) [2023-12-02 17:21:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions. [2023-12-02 17:21:54,543 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 146 [2023-12-02 17:21:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:54,544 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 217 transitions. [2023-12-02 17:21:54,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2023-12-02 17:21:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions. [2023-12-02 17:21:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-02 17:21:54,548 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:54,548 INFO L195 NwaCegarLoop]: trace histogram [19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:54,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:21:54,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 17:21:54,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:54,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:54,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1419450348, now seen corresponding path program 1 times [2023-12-02 17:21:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478619739] [2023-12-02 17:21:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:54,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-12-02 17:21:56,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:56,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478619739] [2023-12-02 17:21:56,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478619739] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:56,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:56,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:21:56,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58697627] [2023-12-02 17:21:56,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:56,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:21:56,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:21:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:21:56,774 INFO L87 Difference]: Start difference. First operand 169 states and 217 transitions. Second operand has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2023-12-02 17:21:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:57,497 INFO L93 Difference]: Finished difference Result 290 states and 376 transitions. [2023-12-02 17:21:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:21:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) Word has length 150 [2023-12-02 17:21:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:57,502 INFO L225 Difference]: With dead ends: 290 [2023-12-02 17:21:57,502 INFO L226 Difference]: Without dead ends: 171 [2023-12-02 17:21:57,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:21:57,505 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 6 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:57,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 822 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:21:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-02 17:21:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-12-02 17:21:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 97 states have internal predecessors, (110), 54 states have call successors, (54), 19 states have call predecessors, (54), 21 states have return successors, (55), 54 states have call predecessors, (55), 53 states have call successors, (55) [2023-12-02 17:21:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2023-12-02 17:21:57,523 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 150 [2023-12-02 17:21:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:57,524 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2023-12-02 17:21:57,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2023-12-02 17:21:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2023-12-02 17:21:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-02 17:21:57,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:57,529 INFO L195 NwaCegarLoop]: trace histogram [19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:57,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:21:57,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:57,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:57,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1888028867, now seen corresponding path program 1 times [2023-12-02 17:21:57,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:57,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995774577] [2023-12-02 17:21:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:57,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2023-12-02 17:21:58,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:58,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995774577] [2023-12-02 17:21:58,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995774577] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:21:58,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350937477] [2023-12-02 17:21:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:58,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:58,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:58,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:21:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:59,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:21:59,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:59,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 17:21:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-12-02 17:21:59,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:21:59,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350937477] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:59,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:21:59,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2023-12-02 17:21:59,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438400745] [2023-12-02 17:21:59,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:59,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:21:59,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:21:59,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:21:59,753 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2023-12-02 17:22:03,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:22:05,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:07,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:09,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:11,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:13,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:16,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:18,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:20,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:22,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:24,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:26,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:22:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:26,985 INFO L93 Difference]: Finished difference Result 339 states and 427 transitions. [2023-12-02 17:22:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:22:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) Word has length 156 [2023-12-02 17:22:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:26,987 INFO L225 Difference]: With dead ends: 339 [2023-12-02 17:22:26,987 INFO L226 Difference]: Without dead ends: 211 [2023-12-02 17:22:26,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:22:26,989 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 63 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 20 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:26,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1573 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 821 Invalid, 12 Unknown, 0 Unchecked, 27.0s Time] [2023-12-02 17:22:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-12-02 17:22:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2023-12-02 17:22:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 118 states have internal predecessors, (132), 62 states have call successors, (62), 27 states have call predecessors, (62), 29 states have return successors, (64), 62 states have call predecessors, (64), 61 states have call successors, (64) [2023-12-02 17:22:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 258 transitions. [2023-12-02 17:22:27,017 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 258 transitions. Word has length 156 [2023-12-02 17:22:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:27,018 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 258 transitions. [2023-12-02 17:22:27,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2023-12-02 17:22:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 258 transitions. [2023-12-02 17:22:27,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 17:22:27,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:27,021 INFO L195 NwaCegarLoop]: trace histogram [19, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:27,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:22:27,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 17:22:27,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:22:27,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1219957887, now seen corresponding path program 1 times [2023-12-02 17:22:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:27,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580222219] [2023-12-02 17:22:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:27,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-12-02 17:22:28,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580222219] [2023-12-02 17:22:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580222219] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347326271] [2023-12-02 17:22:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:28,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:28,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:28,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:28,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:22:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:28,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:22:28,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-02 17:22:28,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:22:28,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347326271] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:28,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:22:28,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-12-02 17:22:28,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787661182] [2023-12-02 17:22:28,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:28,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:22:28,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:28,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:22:28,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:22:28,749 INFO L87 Difference]: Start difference. First operand 208 states and 258 transitions. Second operand has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-12-02 17:22:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:29,237 INFO L93 Difference]: Finished difference Result 310 states and 392 transitions. [2023-12-02 17:22:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:22:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 160 [2023-12-02 17:22:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:29,240 INFO L225 Difference]: With dead ends: 310 [2023-12-02 17:22:29,240 INFO L226 Difference]: Without dead ends: 210 [2023-12-02 17:22:29,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:22:29,242 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 0 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:29,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 646 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:22:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-12-02 17:22:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-12-02 17:22:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 120 states have internal predecessors, (133), 62 states have call successors, (62), 27 states have call predecessors, (62), 30 states have return successors, (67), 62 states have call predecessors, (67), 61 states have call successors, (67) [2023-12-02 17:22:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 262 transitions. [2023-12-02 17:22:29,266 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 262 transitions. Word has length 160 [2023-12-02 17:22:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:29,267 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 262 transitions. [2023-12-02 17:22:29,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-12-02 17:22:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 262 transitions. [2023-12-02 17:22:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-12-02 17:22:29,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:29,270 INFO L195 NwaCegarLoop]: trace histogram [19, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:29,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 17:22:29,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-02 17:22:29,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:22:29,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1801089832, now seen corresponding path program 1 times [2023-12-02 17:22:29,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:29,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899367997] [2023-12-02 17:22:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-12-02 17:22:29,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:29,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899367997] [2023-12-02 17:22:29,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899367997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:29,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230877836] [2023-12-02 17:22:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:29,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:29,910 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:29,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf7f16b-bbdb-40d9-b2a8-a7355d9a505a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:22:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:30,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:22:30,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 188 proven. 24 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-12-02 17:22:30,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-12-02 17:22:30,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230877836] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:30,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950456522] [2023-12-02 17:22:30,974 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2023-12-02 17:22:30,974 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:22:30,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:22:30,984 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:22:30,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:32:12,567 WARN L293 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:32:17,966 WARN L293 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:32:27,178 WARN L293 SmtUtils]: Spent 9.20s on a formula simplification. DAG size of input: 3169 DAG size of output: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:32:33,963 WARN L293 SmtUtils]: Spent 6.78s on a formula simplification that was a NOOP. DAG size: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:32:39,199 WARN L293 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:32:46,939 WARN L293 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 3169 DAG size of output: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)