./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness_negated.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_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/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_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/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_cc731450-c491-44a8-9ca8-7b6c9170fffe/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 df53139c23d24dba7aefd5bf57ab311697cb4acaf6bb42372afc21fb0bb93adf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:41:19,589 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:41:19,655 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 18:41:19,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:41:19,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:41:19,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:41:19,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:41:19,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:41:19,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:41:19,689 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:41:19,690 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:41:19,690 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:41:19,691 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:41:19,691 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:41:19,692 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:41:19,692 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:41:19,693 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:41:19,693 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:41:19,694 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:41:19,694 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:41:19,695 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:41:19,696 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:41:19,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:41:19,697 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:41:19,697 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:41:19,698 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:41:19,698 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:41:19,699 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:41:19,699 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:41:19,699 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:41:19,700 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:41:19,700 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:41:19,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:41:19,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:41:19,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:41:19,701 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:41:19,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:41:19,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:41:19,702 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:41:19,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:41:19,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:41:19,703 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:41:19,703 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:41:19,703 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:41:19,704 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_cc731450-c491-44a8-9ca8-7b6c9170fffe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df53139c23d24dba7aefd5bf57ab311697cb4acaf6bb42372afc21fb0bb93adf [2023-12-02 18:41:19,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:41:19,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:41:19,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:41:19,973 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:41:19,974 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:41:19,975 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness_negated.i [2023-12-02 18:41:22,704 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:41:23,108 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:41:23,109 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness_negated.i [2023-12-02 18:41:23,142 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/data/b45d78f12/bc9e075d5cab4799b1aaccc27d624247/FLAG81a266b02 [2023-12-02 18:41:23,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/data/b45d78f12/bc9e075d5cab4799b1aaccc27d624247 [2023-12-02 18:41:23,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:41:23,157 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:41:23,158 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:41:23,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:41:23,163 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:41:23,164 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:41:23" (1/1) ... [2023-12-02 18:41:23,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420c23d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:23, skipping insertion in model container [2023-12-02 18:41:23,165 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:41:23" (1/1) ... [2023-12-02 18:41:23,275 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:41:23,514 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_cc731450-c491-44a8-9ca8-7b6c9170fffe/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness_negated.i[4503,4516] [2023-12-02 18:41:23,521 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_cc731450-c491-44a8-9ca8-7b6c9170fffe/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness_negated.i[4563,4576] [2023-12-02 18:41:24,568 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,569 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,570 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,570 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,571 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,607 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,607 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,609 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,610 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,611 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,612 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,613 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:24,613 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,082 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 18:41:25,084 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 18:41:25,085 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 18:41:25,086 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 18:41:25,087 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 18:41:25,088 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 18:41:25,088 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 18:41:25,089 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 18:41:25,090 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 18:41:25,090 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 18:41:25,551 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,551 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,573 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,574 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,580 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,581 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,595 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,596 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,597 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,597 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,597 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,598 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,598 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:41:25,657 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:41:25,668 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_cc731450-c491-44a8-9ca8-7b6c9170fffe/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness_negated.i[4503,4516] [2023-12-02 18:41:25,669 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_cc731450-c491-44a8-9ca8-7b6c9170fffe/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness_negated.i[4563,4576] [2023-12-02 18:41:25,700 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,700 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,701 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,701 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,702 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,708 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,708 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,709 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,709 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,710 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,711 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,711 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,711 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,789 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 18:41:25,790 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 18:41:25,791 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 18:41:25,792 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 18:41:25,792 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 18:41:25,793 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 18:41:25,793 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 18:41:25,794 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 18:41:25,794 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 18:41:25,795 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 18:41:25,829 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7544-7555] [2023-12-02 18:41:25,908 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,909 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,916 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,917 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,920 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,928 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,929 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,929 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,930 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,930 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,930 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,931 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 18:41:25,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:41:26,226 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,226 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,226 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,226 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,226 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,227 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,227 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,227 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,227 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,227 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,227 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,227 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,227 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,228 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,228 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,228 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,228 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,228 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:41:26,236 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:41:26,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26 WrapperNode [2023-12-02 18:41:26,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:41:26,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:41:26,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:41:26,238 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:41:26,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,419 INFO L138 Inliner]: procedures = 773, calls = 2431, calls flagged for inlining = 65, calls inlined = 11, statements flattened = 827 [2023-12-02 18:41:26,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:41:26,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:41:26,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:41:26,421 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:41:26,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,440 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,477 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,492 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,498 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,511 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:41:26,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:41:26,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:41:26,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:41:26,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (1/1) ... [2023-12-02 18:41:26,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:41:26,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:26,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:41:26,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:41:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-12-02 18:41:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 18:41:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 18:41:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:41:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-12-02 18:41:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-12-02 18:41:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 18:41:26,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 18:41:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-12-02 18:41:26,579 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-12-02 18:41:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:41:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:41:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:41:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:41:26,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:41:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-12-02 18:41:26,579 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-12-02 18:41:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:41:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-12-02 18:41:26,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-12-02 18:41:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:41:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:41:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-12-02 18:41:26,580 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-12-02 18:41:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure s_update_template_size [2023-12-02 18:41:26,580 INFO L138 BoogieDeclarations]: Found implementation of procedure s_update_template_size [2023-12-02 18:41:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:41:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-12-02 18:41:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-12-02 18:41:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_calloc [2023-12-02 18:41:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_calloc [2023-12-02 18:41:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-12-02 18:41:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-12-02 18:41:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-12-02 18:41:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-12-02 18:41:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-12-02 18:41:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:41:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:41:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-12-02 18:41:26,582 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-12-02 18:41:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 18:41:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 18:41:26,582 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 18:41:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-12-02 18:41:26,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-12-02 18:41:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-12-02 18:41:26,582 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-12-02 18:41:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure s_alloc_state [2023-12-02 18:41:26,583 INFO L138 BoogieDeclarations]: Found implementation of procedure s_alloc_state [2023-12-02 18:41:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:41:26,877 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:41:26,880 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:41:27,896 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume !true; [2023-12-02 18:41:27,914 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:41:28,243 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:41:28,243 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 18:41:28,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:41:28 BoogieIcfgContainer [2023-12-02 18:41:28,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:41:28,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:41:28,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:41:28,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:41:28,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:41:23" (1/3) ... [2023-12-02 18:41:28,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8202749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:41:28, skipping insertion in model container [2023-12-02 18:41:28,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:41:26" (2/3) ... [2023-12-02 18:41:28,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8202749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:41:28, skipping insertion in model container [2023-12-02 18:41:28,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:41:28" (3/3) ... [2023-12-02 18:41:28,254 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_init_unbounded_harness_negated.i [2023-12-02 18:41:28,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:41:28,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:41:28,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:41:28,333 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;@433c756e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:41:28,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:41:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-12-02 18:41:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 18:41:28,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:28,353 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:41:28,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:28,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash 453424502, now seen corresponding path program 1 times [2023-12-02 18:41:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:28,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372020354] [2023-12-02 18:41:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:28,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:41:29,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:29,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372020354] [2023-12-02 18:41:29,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372020354] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:29,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:29,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:29,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871037300] [2023-12-02 18:41:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:29,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:29,108 INFO L87 Difference]: Start difference. First operand has 129 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 18:41:31,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:33,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:35,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:36,107 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2023-12-02 18:41:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:36,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 48 [2023-12-02 18:41:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:36,117 INFO L225 Difference]: With dead ends: 161 [2023-12-02 18:41:36,117 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 18:41:36,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:36,122 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 4 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:36,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 401 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2023-12-02 18:41:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 18:41:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-02 18:41:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 18:41:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2023-12-02 18:41:36,166 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 48 [2023-12-02 18:41:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:36,167 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2023-12-02 18:41:36,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 18:41:36,168 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2023-12-02 18:41:36,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 18:41:36,171 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:36,171 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:41:36,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:41:36,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:36,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2026555826, now seen corresponding path program 1 times [2023-12-02 18:41:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:36,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207079086] [2023-12-02 18:41:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:36,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:41:36,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469752122] [2023-12-02 18:41:36,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:36,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:36,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:36,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:36,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:41:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:36,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 2316 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:41:36,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:41:37,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:37,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:37,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207079086] [2023-12-02 18:41:37,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:41:37,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469752122] [2023-12-02 18:41:37,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469752122] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:37,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:37,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:41:37,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528172868] [2023-12-02 18:41:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:37,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:41:37,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:41:37,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:37,052 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 18:41:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:39,019 INFO L93 Difference]: Finished difference Result 212 states and 255 transitions. [2023-12-02 18:41:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:41:39,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 68 [2023-12-02 18:41:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:39,024 INFO L225 Difference]: With dead ends: 212 [2023-12-02 18:41:39,024 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 18:41:39,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 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 18:41:39,026 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:39,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 516 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 18:41:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 18:41:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-12-02 18:41:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.16) internal successors, (87), 76 states have internal predecessors, (87), 35 states have call successors, (35), 18 states have call predecessors, (35), 19 states have return successors, (37), 35 states have call predecessors, (37), 34 states have call successors, (37) [2023-12-02 18:41:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2023-12-02 18:41:39,045 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 68 [2023-12-02 18:41:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:39,046 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2023-12-02 18:41:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 18:41:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2023-12-02 18:41:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 18:41:39,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:39,049 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:41:39,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:39,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:39,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -885045253, now seen corresponding path program 1 times [2023-12-02 18:41:39,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:39,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366968867] [2023-12-02 18:41:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:39,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:41:40,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:40,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366968867] [2023-12-02 18:41:40,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366968867] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:40,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:40,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:41:40,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507686725] [2023-12-02 18:41:40,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:41:40,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:41:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:40,345 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:41:42,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:44,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:46,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:48,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:49,419 INFO L93 Difference]: Finished difference Result 161 states and 193 transitions. [2023-12-02 18:41:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:41:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 72 [2023-12-02 18:41:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:49,422 INFO L225 Difference]: With dead ends: 161 [2023-12-02 18:41:49,422 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 18:41:49,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:49,423 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 0 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:49,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 518 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 4 Unknown, 0 Unchecked, 9.1s Time] [2023-12-02 18:41:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 18:41:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-12-02 18:41:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 35 states have call successors, (35), 18 states have call predecessors, (35), 19 states have return successors, (37), 35 states have call predecessors, (37), 34 states have call successors, (37) [2023-12-02 18:41:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2023-12-02 18:41:49,434 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 72 [2023-12-02 18:41:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:49,434 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2023-12-02 18:41:49,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:41:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2023-12-02 18:41:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 18:41:49,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:49,436 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:49,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:41:49,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:49,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2006277340, now seen corresponding path program 1 times [2023-12-02 18:41:49,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:49,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185153172] [2023-12-02 18:41:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:49,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:49,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:41:49,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963092686] [2023-12-02 18:41:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:49,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:49,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:41:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:50,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:41:50,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:41:50,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:50,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:50,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185153172] [2023-12-02 18:41:50,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:41:50,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963092686] [2023-12-02 18:41:50,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963092686] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:50,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:50,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:50,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861971149] [2023-12-02 18:41:50,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:50,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:50,328 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:41:52,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:53,429 INFO L93 Difference]: Finished difference Result 214 states and 255 transitions. [2023-12-02 18:41:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 98 [2023-12-02 18:41:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:53,431 INFO L225 Difference]: With dead ends: 214 [2023-12-02 18:41:53,431 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 18:41:53,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:53,433 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 0 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:53,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 394 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 18:41:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 18:41:53,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2023-12-02 18:41:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 73 states have internal predecessors, (82), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 18:41:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2023-12-02 18:41:53,442 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 98 [2023-12-02 18:41:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:53,443 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2023-12-02 18:41:53,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:41:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2023-12-02 18:41:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 18:41:53,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:53,445 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2023-12-02 18:41:53,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:53,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:53,645 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:53,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:53,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1857780092, now seen corresponding path program 1 times [2023-12-02 18:41:53,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:53,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162937880] [2023-12-02 18:41:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:53,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:53,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:41:53,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051727060] [2023-12-02 18:41:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:53,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:53,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:53,811 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:53,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:41:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:54,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 2712 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:41:54,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 18:41:54,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:54,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:54,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162937880] [2023-12-02 18:41:54,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:41:54,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051727060] [2023-12-02 18:41:54,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051727060] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:54,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:54,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:41:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018462062] [2023-12-02 18:41:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:54,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:41:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:54,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:41:54,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:54,529 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:41:56,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:58,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:00,184 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2023-12-02 18:42:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:42:00,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 103 [2023-12-02 18:42:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:00,187 INFO L225 Difference]: With dead ends: 162 [2023-12-02 18:42:00,187 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 18:42:00,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 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 18:42:00,188 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 1 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:00,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 507 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2023-12-02 18:42:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 18:42:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-12-02 18:42:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 76 states have internal predecessors, (85), 35 states have call successors, (35), 18 states have call predecessors, (35), 19 states have return successors, (37), 35 states have call predecessors, (37), 34 states have call successors, (37) [2023-12-02 18:42:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2023-12-02 18:42:00,198 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 103 [2023-12-02 18:42:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:00,198 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2023-12-02 18:42:00,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:42:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2023-12-02 18:42:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 18:42:00,200 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:00,200 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2023-12-02 18:42:00,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:42:00,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:00,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:00,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1209477459, now seen corresponding path program 1 times [2023-12-02 18:42:00,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:00,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568446614] [2023-12-02 18:42:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:00,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:00,547 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:00,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884214449] [2023-12-02 18:42:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:00,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:00,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:00,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:00,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:42:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:01,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:42:01,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 18:42:01,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:42:01,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:01,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568446614] [2023-12-02 18:42:01,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:01,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884214449] [2023-12-02 18:42:01,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884214449] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:42:01,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:42:01,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:42:01,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313312193] [2023-12-02 18:42:01,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:01,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:42:01,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:01,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:42:01,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:42:01,349 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 18:42:03,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:05,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:07,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:10,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:12,095 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2023-12-02 18:42:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:42:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 107 [2023-12-02 18:42:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:12,098 INFO L225 Difference]: With dead ends: 162 [2023-12-02 18:42:12,098 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 18:42:12,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:42:12,099 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:12,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 647 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2023-12-02 18:42:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 18:42:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2023-12-02 18:42:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.125) internal successors, (81), 73 states have internal predecessors, (81), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 18:42:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 150 transitions. [2023-12-02 18:42:12,107 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 150 transitions. Word has length 107 [2023-12-02 18:42:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:12,107 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 150 transitions. [2023-12-02 18:42:12,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 18:42:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 150 transitions. [2023-12-02 18:42:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 18:42:12,109 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:12,109 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:12,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:42:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 18:42:12,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:12,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash 522149628, now seen corresponding path program 1 times [2023-12-02 18:42:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:12,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912727925] [2023-12-02 18:42:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:12,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:12,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:12,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817224192] [2023-12-02 18:42:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:12,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:12,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:42:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:13,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 18:42:13,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 18:42:13,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:42:13,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:13,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912727925] [2023-12-02 18:42:13,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:13,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817224192] [2023-12-02 18:42:13,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817224192] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:42:13,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:42:13,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:42:13,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539634904] [2023-12-02 18:42:13,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:13,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:42:13,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:42:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:42:13,196 INFO L87 Difference]: Start difference. First operand 126 states and 150 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-12-02 18:42:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:15,235 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2023-12-02 18:42:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:42:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 114 [2023-12-02 18:42:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:15,237 INFO L225 Difference]: With dead ends: 165 [2023-12-02 18:42:15,237 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 18:42:15,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:42:15,238 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 3 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:15,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 624 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 18:42:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 18:42:15,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2023-12-02 18:42:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.12) internal successors, (84), 76 states have internal predecessors, (84), 35 states have call successors, (35), 18 states have call predecessors, (35), 19 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2023-12-02 18:42:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2023-12-02 18:42:15,248 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 114 [2023-12-02 18:42:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:15,249 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2023-12-02 18:42:15,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-12-02 18:42:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2023-12-02 18:42:15,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 18:42:15,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:15,251 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2023-12-02 18:42:15,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 18:42:15,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:15,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:15,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash -680533924, now seen corresponding path program 1 times [2023-12-02 18:42:15,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:15,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579122156] [2023-12-02 18:42:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:15,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:15,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:15,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095133900] [2023-12-02 18:42:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:15,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:15,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:15,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:15,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:42:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:16,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 18:42:16,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 18:42:16,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:42:16,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:16,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579122156] [2023-12-02 18:42:16,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:16,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095133900] [2023-12-02 18:42:16,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095133900] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:42:16,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:42:16,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:42:16,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025927002] [2023-12-02 18:42:16,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:16,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:42:16,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:42:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:42:16,401 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-12-02 18:42:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:18,417 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2023-12-02 18:42:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:42:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 118 [2023-12-02 18:42:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:18,419 INFO L225 Difference]: With dead ends: 163 [2023-12-02 18:42:18,419 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 18:42:18,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:42:18,420 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 3 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:18,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 750 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 18:42:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 18:42:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-12-02 18:42:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 72 states have internal predecessors, (78), 34 states have call successors, (34), 18 states have call predecessors, (34), 18 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-02 18:42:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2023-12-02 18:42:18,428 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 118 [2023-12-02 18:42:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:18,428 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2023-12-02 18:42:18,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-12-02 18:42:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2023-12-02 18:42:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 18:42:18,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:18,431 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:18,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:42:18,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:18,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:18,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1455860123, now seen corresponding path program 1 times [2023-12-02 18:42:18,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:18,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601397994] [2023-12-02 18:42:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:18,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:18,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:18,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66665281] [2023-12-02 18:42:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:18,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:18,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:18,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:18,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:42:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:19,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 2924 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 18:42:19,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:19,711 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 8 treesize of output 1 [2023-12-02 18:42:19,756 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 18:42:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-12-02 18:42:20,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:20,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2023-12-02 18:42:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-12-02 18:42:21,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:21,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601397994] [2023-12-02 18:42:21,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66665281] [2023-12-02 18:42:21,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66665281] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:42:21,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:42:21,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 21 [2023-12-02 18:42:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686169987] [2023-12-02 18:42:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:21,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 18:42:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 18:42:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:42:21,218 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) [2023-12-02 18:42:23,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:26,499 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2023-12-02 18:42:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:42:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) Word has length 131 [2023-12-02 18:42:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:26,501 INFO L225 Difference]: With dead ends: 152 [2023-12-02 18:42:26,501 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 18:42:26,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2023-12-02 18:42:26,503 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 132 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:26,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1182 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 18:42:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 18:42:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-02 18:42:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 74 states have internal predecessors, (79), 34 states have call successors, (34), 18 states have call predecessors, (34), 19 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2023-12-02 18:42:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2023-12-02 18:42:26,510 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 131 [2023-12-02 18:42:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:26,510 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2023-12-02 18:42:26,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 6 states have call predecessors, (26), 4 states have call successors, (26) [2023-12-02 18:42:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2023-12-02 18:42:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:42:26,512 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:26,512 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:26,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 18:42:26,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:26,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:26,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:26,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1500144244, now seen corresponding path program 1 times [2023-12-02 18:42:26,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:26,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376644147] [2023-12-02 18:42:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:26,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:26,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:26,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155233701] [2023-12-02 18:42:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:26,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:26,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:26,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:26,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:42:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:27,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 2948 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 18:42:27,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:29,940 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1| Int)) (and (not (= |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1| 0)) (exists ((aws_hash_table_is_valid_~map.offset Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1|) aws_hash_table_is_valid_~map.offset) 0))))) (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1| Int) (aws_hash_table_is_valid_~map.offset Int)) (and (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1|) aws_hash_table_is_valid_~map.offset) 0)) (not (= aws_hash_table_is_valid_~map.offset 0)))) (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1| Int)) (and (not (= |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1| 0)) (exists ((aws_hash_table_is_valid_~map.offset Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1|) aws_hash_table_is_valid_~map.offset) 0))))) (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1| Int) (aws_hash_table_is_valid_~map.offset Int)) (and (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1|) aws_hash_table_is_valid_~map.offset) 0)) (not (= aws_hash_table_is_valid_~map.offset 0))))) is different from true [2023-12-02 18:42:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-12-02 18:42:30,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-12-02 18:42:32,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:32,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376644147] [2023-12-02 18:42:32,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:32,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155233701] [2023-12-02 18:42:32,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155233701] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:42:32,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:42:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-12-02 18:42:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312537195] [2023-12-02 18:42:32,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:32,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:42:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:42:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=105, Unknown=2, NotChecked=20, Total=156 [2023-12-02 18:42:32,490 INFO L87 Difference]: Start difference. First operand 126 states and 147 transitions. Second operand has 6 states, 5 states have (on average 12.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 18:42:34,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:36,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:37,689 INFO L93 Difference]: Finished difference Result 156 states and 181 transitions. [2023-12-02 18:42:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:42:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 137 [2023-12-02 18:42:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:37,691 INFO L225 Difference]: With dead ends: 156 [2023-12-02 18:42:37,691 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 18:42:37,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=33, Invalid=125, Unknown=2, NotChecked=22, Total=182 [2023-12-02 18:42:37,692 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 6 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:37,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 460 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-12-02 18:42:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 18:42:37,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-02 18:42:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 34 states have call successors, (34), 18 states have call predecessors, (34), 19 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2023-12-02 18:42:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2023-12-02 18:42:37,701 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 137 [2023-12-02 18:42:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:37,702 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2023-12-02 18:42:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 18:42:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2023-12-02 18:42:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 18:42:37,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:37,704 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:37,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:42:37,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:37,905 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:37,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash 503629703, now seen corresponding path program 1 times [2023-12-02 18:42:37,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:37,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672918524] [2023-12-02 18:42:37,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:37,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:38,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:38,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314559608] [2023-12-02 18:42:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:38,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:38,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:38,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:38,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:42:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:38,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 2979 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:42:38,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 18:42:38,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:42:38,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:38,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672918524] [2023-12-02 18:42:38,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:42:38,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314559608] [2023-12-02 18:42:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314559608] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:42:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:42:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:42:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513043488] [2023-12-02 18:42:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:38,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:42:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:42:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:42:38,990 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-12-02 18:42:41,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:43,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:42:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:43,646 INFO L93 Difference]: Finished difference Result 231 states and 261 transitions. [2023-12-02 18:42:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:42:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 141 [2023-12-02 18:42:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:43,647 INFO L225 Difference]: With dead ends: 231 [2023-12-02 18:42:43,647 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 18:42:43,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:42:43,649 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 3 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:43,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 238 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-12-02 18:42:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 18:42:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2023-12-02 18:42:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 74 states have internal predecessors, (77), 34 states have call successors, (34), 18 states have call predecessors, (34), 19 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2023-12-02 18:42:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2023-12-02 18:42:43,658 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 141 [2023-12-02 18:42:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:43,658 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2023-12-02 18:42:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-12-02 18:42:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2023-12-02 18:42:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-02 18:42:43,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:43,659 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:43,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:42:43,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 18:42:43,860 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:43,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:43,860 INFO L85 PathProgramCache]: Analyzing trace with hash -435344645, now seen corresponding path program 1 times [2023-12-02 18:42:43,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:43,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116159729] [2023-12-02 18:42:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:43,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:43,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:42:43,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170773209] [2023-12-02 18:42:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:44,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:44,001 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:44,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc731450-c491-44a8-9ca8-7b6c9170fffe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:54:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 18:54:45,991 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.