./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/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_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/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_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/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 66d360c8c29bda7e5219dac4b14837aec8d465009822b05f671b68702d836670 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:44:57,453 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:44:57,545 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 16:44:57,549 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:44:57,550 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:44:57,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:44:57,576 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:44:57,576 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:44:57,577 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:44:57,578 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:44:57,578 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:44:57,579 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:44:57,579 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:44:57,580 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:44:57,580 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:44:57,581 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:44:57,581 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:44:57,582 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:44:57,582 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:44:57,583 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:44:57,583 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:44:57,584 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:44:57,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:44:57,585 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:44:57,585 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:44:57,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:44:57,586 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:44:57,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:44:57,586 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:44:57,587 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:44:57,587 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:44:57,588 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:44:57,588 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:44:57,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:44:57,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:44:57,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:44:57,589 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:44:57,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:44:57,589 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:44:57,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:44:57,589 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:44:57,590 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:44:57,590 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:44:57,590 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:44:57,590 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_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66d360c8c29bda7e5219dac4b14837aec8d465009822b05f671b68702d836670 [2023-12-02 16:44:57,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:44:57,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:44:57,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:44:57,837 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:44:57,839 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:44:57,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i [2023-12-02 16:45:00,636 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:45:01,085 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:45:01,085 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i [2023-12-02 16:45:01,118 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/data/99d76a41c/e5e0f91306124b31861e8a6e0088fe51/FLAG7602d6c71 [2023-12-02 16:45:01,133 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/data/99d76a41c/e5e0f91306124b31861e8a6e0088fe51 [2023-12-02 16:45:01,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:45:01,137 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:45:01,138 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:45:01,138 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:45:01,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:45:01,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:45:01" (1/1) ... [2023-12-02 16:45:01,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1ea3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:01, skipping insertion in model container [2023-12-02 16:45:01,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:45:01" (1/1) ... [2023-12-02 16:45:01,274 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:45:01,544 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_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i[4491,4504] [2023-12-02 16:45:01,553 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_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i[4551,4564] [2023-12-02 16:45:02,509 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,510 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,511 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,512 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,513 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,529 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,530 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,532 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,533 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,535 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,536 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,537 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,537 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:02,982 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 16:45:02,983 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 16:45:02,985 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 16:45:02,986 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 16:45:02,988 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 16:45:02,989 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 16:45:02,990 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 16:45:02,991 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 16:45:02,992 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 16:45:02,993 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 16:45:03,523 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,524 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,556 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,558 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,564 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,565 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,580 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,595 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,597 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,597 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,598 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,599 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,599 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:45:03,672 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:45:03,685 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_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i[4491,4504] [2023-12-02 16:45:03,686 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_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i[4551,4564] [2023-12-02 16:45:03,721 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,721 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,721 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,722 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,722 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,728 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,729 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,730 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,730 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,731 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,731 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,732 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,732 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,764 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 16:45:03,765 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 16:45:03,766 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 16:45:03,767 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 16:45:03,768 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 16:45:03,768 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 16:45:03,769 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 16:45:03,769 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 16:45:03,770 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 16:45:03,770 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 16:45:03,807 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-12-02 16:45:03,892 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,892 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,900 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,901 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,903 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,904 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,913 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,913 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,915 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,915 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:45:03,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:45:04,185 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,185 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,185 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,186 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,186 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,186 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,186 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,186 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,186 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,186 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,186 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,187 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,187 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,187 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,187 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,187 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,187 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,187 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:45:04,194 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:45:04,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04 WrapperNode [2023-12-02 16:45:04,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:45:04,195 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:45:04,195 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:45:04,195 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:45:04,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,295 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,376 INFO L138 Inliner]: procedures = 772, calls = 2456, calls flagged for inlining = 68, calls inlined = 18, statements flattened = 968 [2023-12-02 16:45:04,376 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:45:04,377 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:45:04,377 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:45:04,377 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:45:04,387 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,397 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,397 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,435 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,442 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,475 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:45:04,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:45:04,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:45:04,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:45:04,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (1/1) ... [2023-12-02 16:45:04,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:45:04,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:04,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:45:04,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:45:04,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-12-02 16:45:04,549 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_hash_table [2023-12-02 16:45:04,550 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_hash_table [2023-12-02 16:45:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:45:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-12-02 16:45:04,550 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-12-02 16:45:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:45:04,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:45:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-12-02 16:45:04,551 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-12-02 16:45:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:45:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:45:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:45:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:45:04,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:45:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 16:45:04,551 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 16:45:04,552 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-12-02 16:45:04,552 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-12-02 16:45:04,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:45:04,552 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-12-02 16:45:04,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-12-02 16:45:04,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 16:45:04,552 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 16:45:04,552 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 16:45:04,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:45:04,553 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2023-12-02 16:45:04,553 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2023-12-02 16:45:04,553 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-12-02 16:45:04,553 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-12-02 16:45:04,553 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2023-12-02 16:45:04,553 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2023-12-02 16:45:04,553 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-12-02 16:45:04,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-12-02 16:45:04,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:45:04,554 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_get_entry_count [2023-12-02 16:45:04,554 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_get_entry_count [2023-12-02 16:45:04,554 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-12-02 16:45:04,554 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-12-02 16:45:04,554 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-12-02 16:45:04,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-12-02 16:45:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2023-12-02 16:45:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2023-12-02 16:45:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2023-12-02 16:45:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2023-12-02 16:45:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 16:45:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 16:45:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-12-02 16:45:04,555 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-12-02 16:45:04,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 16:45:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_allocated_hash_table [2023-12-02 16:45:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_allocated_hash_table [2023-12-02 16:45:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-12-02 16:45:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-12-02 16:45:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-12-02 16:45:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-12-02 16:45:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure check_hash_table_unchanged [2023-12-02 16:45:04,556 INFO L138 BoogieDeclarations]: Found implementation of procedure check_hash_table_unchanged [2023-12-02 16:45:04,556 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-12-02 16:45:04,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-12-02 16:45:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:45:04,893 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:45:04,896 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:45:05,013 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2023-12-02 16:45:05,094 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-12-02 16:45:05,889 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !true; [2023-12-02 16:45:05,889 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !true; [2023-12-02 16:45:05,889 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-12-02 16:45:05,889 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##60: assume !true; [2023-12-02 16:45:05,889 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##51: assume !true; [2023-12-02 16:45:05,922 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:45:06,159 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:45:06,159 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-02 16:45:06,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:45:06 BoogieIcfgContainer [2023-12-02 16:45:06,161 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:45:06,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:45:06,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:45:06,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:45:06,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:45:01" (1/3) ... [2023-12-02 16:45:06,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148b7d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:45:06, skipping insertion in model container [2023-12-02 16:45:06,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:45:04" (2/3) ... [2023-12-02 16:45:06,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148b7d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:45:06, skipping insertion in model container [2023-12-02 16:45:06,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:45:06" (3/3) ... [2023-12-02 16:45:06,170 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_eq_harness.i [2023-12-02 16:45:06,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:45:06,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:45:06,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:45:06,253 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;@7989a6bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:45:06,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:45:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 248 states, 140 states have (on average 1.2214285714285715) internal successors, (171), 134 states have internal predecessors, (171), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2023-12-02 16:45:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-12-02 16:45:06,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:06,281 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:06,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:06,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1053360771, now seen corresponding path program 1 times [2023-12-02 16:45:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:06,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570882385] [2023-12-02 16:45:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:06,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:06,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:45:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629035921] [2023-12-02 16:45:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:06,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:06,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:45:06,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:45:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:07,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:45:07,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:45:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2023-12-02 16:45:07,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:45:07,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:07,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570882385] [2023-12-02 16:45:07,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:45:07,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629035921] [2023-12-02 16:45:07,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629035921] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:07,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:45:07,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:45:07,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494672625] [2023-12-02 16:45:07,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:07,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:45:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:07,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:45:07,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:45:07,736 INFO L87 Difference]: Start difference. First operand has 248 states, 140 states have (on average 1.2214285714285715) internal successors, (171), 134 states have internal predecessors, (171), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2023-12-02 16:45:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:08,256 INFO L93 Difference]: Finished difference Result 498 states and 730 transitions. [2023-12-02 16:45:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:45:08,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) Word has length 213 [2023-12-02 16:45:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:08,271 INFO L225 Difference]: With dead ends: 498 [2023-12-02 16:45:08,272 INFO L226 Difference]: Without dead ends: 250 [2023-12-02 16:45:08,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 209 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 16:45:08,282 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 1 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:08,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1212 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:45:08,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-02 16:45:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2023-12-02 16:45:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 135 states have (on average 1.2074074074074075) internal successors, (163), 136 states have internal predecessors, (163), 89 states have call successors, (89), 24 states have call predecessors, (89), 25 states have return successors, (89), 89 states have call predecessors, (89), 88 states have call successors, (89) [2023-12-02 16:45:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 341 transitions. [2023-12-02 16:45:08,347 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 341 transitions. Word has length 213 [2023-12-02 16:45:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:08,348 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 341 transitions. [2023-12-02 16:45:08,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.75) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2023-12-02 16:45:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 341 transitions. [2023-12-02 16:45:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-12-02 16:45:08,354 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:08,355 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:08,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:45:08,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 16:45:08,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:08,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1515681917, now seen corresponding path program 1 times [2023-12-02 16:45:08,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:08,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687155447] [2023-12-02 16:45:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:08,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2023-12-02 16:45:11,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687155447] [2023-12-02 16:45:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687155447] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:45:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015511700] [2023-12-02 16:45:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:11,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:11,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:45:11,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:45:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:11,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 3152 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:45:11,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:45:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2023-12-02 16:45:12,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:45:12,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015511700] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:12,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:45:12,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-12-02 16:45:12,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181874485] [2023-12-02 16:45:12,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:12,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:45:12,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:45:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:45:12,022 INFO L87 Difference]: Start difference. First operand 250 states and 341 transitions. Second operand has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-02 16:45:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:12,460 INFO L93 Difference]: Finished difference Result 499 states and 696 transitions. [2023-12-02 16:45:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:45:12,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 229 [2023-12-02 16:45:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:12,465 INFO L225 Difference]: With dead ends: 499 [2023-12-02 16:45:12,465 INFO L226 Difference]: Without dead ends: 252 [2023-12-02 16:45:12,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:45:12,468 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:12,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1401 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:45:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-12-02 16:45:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-12-02 16:45:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 138 states have internal predecessors, (164), 89 states have call successors, (89), 24 states have call predecessors, (89), 26 states have return successors, (106), 89 states have call predecessors, (106), 88 states have call successors, (106) [2023-12-02 16:45:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 359 transitions. [2023-12-02 16:45:12,502 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 359 transitions. Word has length 229 [2023-12-02 16:45:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:12,502 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 359 transitions. [2023-12-02 16:45:12,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 23.0) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-02 16:45:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 359 transitions. [2023-12-02 16:45:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-12-02 16:45:12,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:12,508 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:12,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:45:12,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:12,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:12,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash 71108876, now seen corresponding path program 1 times [2023-12-02 16:45:12,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:12,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403891171] [2023-12-02 16:45:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:12,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-12-02 16:45:14,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403891171] [2023-12-02 16:45:14,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403891171] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:45:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154173818] [2023-12-02 16:45:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:14,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:14,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:45:14,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:45:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:15,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 16:45:15,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:45:15,228 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 16:45:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-12-02 16:45:15,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:45:15,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154173818] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:15,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:45:15,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2023-12-02 16:45:15,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582797989] [2023-12-02 16:45:15,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:15,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 16:45:15,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 16:45:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:45:15,609 INFO L87 Difference]: Start difference. First operand 252 states and 359 transitions. Second operand has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) [2023-12-02 16:45:19,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:45:21,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:23,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:25,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:27,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:29,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:31,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:34,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:36,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:38,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:40,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:42,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:44,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:46,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:45:48,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:50,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:52,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:54,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:56,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:45:58,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:00,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:00,990 INFO L93 Difference]: Finished difference Result 581 states and 809 transitions. [2023-12-02 16:46:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 16:46:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) Word has length 235 [2023-12-02 16:46:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:00,995 INFO L225 Difference]: With dead ends: 581 [2023-12-02 16:46:00,995 INFO L226 Difference]: Without dead ends: 325 [2023-12-02 16:46:00,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:46:00,999 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 128 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 26 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:00,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 2290 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 881 Invalid, 21 Unknown, 0 Unchecked, 45.2s Time] [2023-12-02 16:46:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-12-02 16:46:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2023-12-02 16:46:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 175 states have (on average 1.1828571428571428) internal successors, (207), 176 states have internal predecessors, (207), 108 states have call successors, (108), 38 states have call predecessors, (108), 38 states have return successors, (113), 107 states have call predecessors, (113), 107 states have call successors, (113) [2023-12-02 16:46:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 428 transitions. [2023-12-02 16:46:01,036 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 428 transitions. Word has length 235 [2023-12-02 16:46:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:01,037 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 428 transitions. [2023-12-02 16:46:01,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 8.0) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (46), 3 states have call predecessors, (46), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) [2023-12-02 16:46:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 428 transitions. [2023-12-02 16:46:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-12-02 16:46:01,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:01,042 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:01,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:46:01,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:01,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:01,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2000999171, now seen corresponding path program 1 times [2023-12-02 16:46:01,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:01,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638288162] [2023-12-02 16:46:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:01,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:46:01,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941718084] [2023-12-02 16:46:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:01,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:01,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:01,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:01,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:46:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:02,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 3311 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:46:02,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:46:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-12-02 16:46:02,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:46:02,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:02,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638288162] [2023-12-02 16:46:02,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:46:02,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941718084] [2023-12-02 16:46:02,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941718084] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:02,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:46:02,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:46:02,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331646189] [2023-12-02 16:46:02,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:02,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:46:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:02,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:46:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:46:02,126 INFO L87 Difference]: Start difference. First operand 322 states and 428 transitions. Second operand has 6 states, 3 states have (on average 26.0) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-12-02 16:46:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:02,698 INFO L93 Difference]: Finished difference Result 545 states and 747 transitions. [2023-12-02 16:46:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:46:02,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 26.0) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 244 [2023-12-02 16:46:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:02,703 INFO L225 Difference]: With dead ends: 545 [2023-12-02 16:46:02,704 INFO L226 Difference]: Without dead ends: 324 [2023-12-02 16:46:02,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 239 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 16:46:02,706 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:02,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1401 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:46:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-02 16:46:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2023-12-02 16:46:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 176 states have (on average 1.1818181818181819) internal successors, (208), 178 states have internal predecessors, (208), 108 states have call successors, (108), 38 states have call predecessors, (108), 39 states have return successors, (129), 107 states have call predecessors, (129), 107 states have call successors, (129) [2023-12-02 16:46:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 445 transitions. [2023-12-02 16:46:02,735 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 445 transitions. Word has length 244 [2023-12-02 16:46:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:02,736 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 445 transitions. [2023-12-02 16:46:02,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 26.0) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-12-02 16:46:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 445 transitions. [2023-12-02 16:46:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-02 16:46:02,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:02,740 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:02,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:46:02,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:02,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:02,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:02,941 INFO L85 PathProgramCache]: Analyzing trace with hash -587984366, now seen corresponding path program 1 times [2023-12-02 16:46:02,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:02,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927058987] [2023-12-02 16:46:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:02,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-12-02 16:46:04,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:46:04,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927058987] [2023-12-02 16:46:04,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927058987] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:46:04,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221513410] [2023-12-02 16:46:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:04,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:04,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:04,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:46:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:46:05,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 3231 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 16:46:05,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:46:05,196 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 16:46:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-12-02 16:46:05,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:46:05,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221513410] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:46:05,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:46:05,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2023-12-02 16:46:05,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923644867] [2023-12-02 16:46:05,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:46:05,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 16:46:05,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:46:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 16:46:05,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:46:05,510 INFO L87 Difference]: Start difference. First operand 324 states and 445 transitions. Second operand has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) [2023-12-02 16:46:09,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:46:11,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:13,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:15,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:17,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:19,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:21,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:24,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:26,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:28,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:30,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 16:46:32,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:34,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:36,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:38,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:40,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:43,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:45,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:47,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:49,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:51,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:53,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:56,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:58,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:46:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:46:59,020 INFO L93 Difference]: Finished difference Result 790 states and 1108 transitions. [2023-12-02 16:46:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 16:46:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) Word has length 245 [2023-12-02 16:46:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:46:59,024 INFO L225 Difference]: With dead ends: 790 [2023-12-02 16:46:59,024 INFO L226 Difference]: Without dead ends: 567 [2023-12-02 16:46:59,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:46:59,026 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 269 mSDsluCounter, 4031 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 60 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 4494 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:46:59,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 4494 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2291 Invalid, 24 Unknown, 0 Unchecked, 53.2s Time] [2023-12-02 16:46:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-12-02 16:46:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 559. [2023-12-02 16:46:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 304 states have (on average 1.194078947368421) internal successors, (363), 306 states have internal predecessors, (363), 184 states have call successors, (184), 69 states have call predecessors, (184), 70 states have return successors, (210), 183 states have call predecessors, (210), 182 states have call successors, (210) [2023-12-02 16:46:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 757 transitions. [2023-12-02 16:46:59,068 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 757 transitions. Word has length 245 [2023-12-02 16:46:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:46:59,069 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 757 transitions. [2023-12-02 16:46:59,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 9.11111111111111) internal successors, (82), 11 states have internal predecessors, (82), 6 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 6 states have call successors, (48) [2023-12-02 16:46:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 757 transitions. [2023-12-02 16:46:59,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-12-02 16:46:59,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:46:59,072 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:46:59,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 16:46:59,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:59,273 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:46:59,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:46:59,273 INFO L85 PathProgramCache]: Analyzing trace with hash 658759321, now seen corresponding path program 2 times [2023-12-02 16:46:59,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:46:59,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941297109] [2023-12-02 16:46:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:46:59,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:46:59,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:46:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051198198] [2023-12-02 16:46:59,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:46:59,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:46:59,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:46:59,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:46:59,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:47:00,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:47:00,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:47:00,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 2203 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:47:00,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-12-02 16:47:00,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:47:00,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:00,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941297109] [2023-12-02 16:47:00,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:47:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051198198] [2023-12-02 16:47:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051198198] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:00,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:00,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:47:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738017148] [2023-12-02 16:47:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:00,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:47:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:47:00,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:47:00,461 INFO L87 Difference]: Start difference. First operand 559 states and 757 transitions. Second operand has 5 states, 4 states have (on average 21.75) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2023-12-02 16:47:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:01,000 INFO L93 Difference]: Finished difference Result 1058 states and 1443 transitions. [2023-12-02 16:47:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:47:01,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 21.75) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 259 [2023-12-02 16:47:01,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:01,005 INFO L225 Difference]: With dead ends: 1058 [2023-12-02 16:47:01,005 INFO L226 Difference]: Without dead ends: 565 [2023-12-02 16:47:01,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 255 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 16:47:01,007 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 0 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:47:01,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1114 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:47:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-12-02 16:47:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2023-12-02 16:47:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 306 states have (on average 1.1895424836601307) internal successors, (364), 310 states have internal predecessors, (364), 184 states have call successors, (184), 69 states have call predecessors, (184), 72 states have return successors, (212), 183 states have call predecessors, (212), 182 states have call successors, (212) [2023-12-02 16:47:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 760 transitions. [2023-12-02 16:47:01,042 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 760 transitions. Word has length 259 [2023-12-02 16:47:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:01,043 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 760 transitions. [2023-12-02 16:47:01,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 21.75) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2023-12-02 16:47:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 760 transitions. [2023-12-02 16:47:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-12-02 16:47:01,045 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:01,045 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:47:01,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:47:01,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 16:47:01,246 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:01,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1579010207, now seen corresponding path program 3 times [2023-12-02 16:47:01,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:01,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540093449] [2023-12-02 16:47:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:01,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:01,367 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:47:01,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667128768] [2023-12-02 16:47:01,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:47:01,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:01,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:47:01,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:47:02,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:47:02,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:47:02,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 3574 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:47:02,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-12-02 16:47:02,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:47:02,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540093449] [2023-12-02 16:47:02,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:47:02,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667128768] [2023-12-02 16:47:02,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667128768] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:02,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:02,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:47:02,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751093717] [2023-12-02 16:47:02,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:02,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:47:02,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:47:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:47:02,344 INFO L87 Difference]: Start difference. First operand 563 states and 760 transitions. Second operand has 6 states, 3 states have (on average 21.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-12-02 16:47:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:02,911 INFO L93 Difference]: Finished difference Result 894 states and 1259 transitions. [2023-12-02 16:47:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:47:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 21.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 264 [2023-12-02 16:47:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:02,918 INFO L225 Difference]: With dead ends: 894 [2023-12-02 16:47:02,918 INFO L226 Difference]: Without dead ends: 567 [2023-12-02 16:47:02,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 259 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 16:47:02,921 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:47:02,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1401 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:47:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-12-02 16:47:02,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2023-12-02 16:47:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 308 states have (on average 1.1883116883116882) internal successors, (366), 314 states have internal predecessors, (366), 184 states have call successors, (184), 69 states have call predecessors, (184), 74 states have return successors, (237), 183 states have call predecessors, (237), 182 states have call successors, (237) [2023-12-02 16:47:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 787 transitions. [2023-12-02 16:47:02,971 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 787 transitions. Word has length 264 [2023-12-02 16:47:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:02,971 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 787 transitions. [2023-12-02 16:47:02,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 21.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-12-02 16:47:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 787 transitions. [2023-12-02 16:47:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-12-02 16:47:02,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:02,975 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:47:02,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 16:47:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:03,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:03,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1418153550, now seen corresponding path program 1 times [2023-12-02 16:47:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:03,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229873587] [2023-12-02 16:47:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:03,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:03,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:47:03,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805247728] [2023-12-02 16:47:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:03,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:03,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:03,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:47:03,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:47:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:04,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 3598 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 16:47:04,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-12-02 16:47:04,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:47:04,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:04,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229873587] [2023-12-02 16:47:04,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:47:04,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805247728] [2023-12-02 16:47:04,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805247728] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:04,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:04,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:47:04,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547743647] [2023-12-02 16:47:04,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:04,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:47:04,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:47:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:47:04,117 INFO L87 Difference]: Start difference. First operand 567 states and 787 transitions. Second operand has 7 states, 4 states have (on average 16.25) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-12-02 16:47:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:04,701 INFO L93 Difference]: Finished difference Result 894 states and 1276 transitions. [2023-12-02 16:47:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:47:04,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 16.25) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 270 [2023-12-02 16:47:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:04,707 INFO L225 Difference]: With dead ends: 894 [2023-12-02 16:47:04,707 INFO L226 Difference]: Without dead ends: 569 [2023-12-02 16:47:04,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:47:04,709 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 0 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:47:04,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1695 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:47:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-12-02 16:47:04,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 567. [2023-12-02 16:47:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 308 states have (on average 1.1883116883116882) internal successors, (366), 314 states have internal predecessors, (366), 184 states have call successors, (184), 69 states have call predecessors, (184), 74 states have return successors, (235), 183 states have call predecessors, (235), 182 states have call successors, (235) [2023-12-02 16:47:04,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 785 transitions. [2023-12-02 16:47:04,757 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 785 transitions. Word has length 270 [2023-12-02 16:47:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:04,758 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 785 transitions. [2023-12-02 16:47:04,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 16.25) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2023-12-02 16:47:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 785 transitions. [2023-12-02 16:47:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-02 16:47:04,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:04,761 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:47:04,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:47:04,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:04,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:04,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:04,965 INFO L85 PathProgramCache]: Analyzing trace with hash -863081215, now seen corresponding path program 2 times [2023-12-02 16:47:04,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:04,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065832256] [2023-12-02 16:47:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:04,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:05,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:47:05,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751923309] [2023-12-02 16:47:05,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:47:05,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:05,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:05,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:47:05,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:47:06,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 16:47:06,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:47:06,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 2541 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:47:06,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2023-12-02 16:47:06,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:47:06,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:06,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065832256] [2023-12-02 16:47:06,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:47:06,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751923309] [2023-12-02 16:47:06,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751923309] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:06,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:06,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:47:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052027155] [2023-12-02 16:47:06,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:47:06,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:47:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:47:06,442 INFO L87 Difference]: Start difference. First operand 567 states and 785 transitions. Second operand has 6 states, 3 states have (on average 21.666666666666668) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-12-02 16:47:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:06,931 INFO L93 Difference]: Finished difference Result 880 states and 1243 transitions. [2023-12-02 16:47:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:47:06,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 21.666666666666668) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 276 [2023-12-02 16:47:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:06,935 INFO L225 Difference]: With dead ends: 880 [2023-12-02 16:47:06,935 INFO L226 Difference]: Without dead ends: 567 [2023-12-02 16:47:06,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 271 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 16:47:06,937 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:47:06,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1399 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:47:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-12-02 16:47:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2023-12-02 16:47:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 308 states have (on average 1.1883116883116882) internal successors, (366), 314 states have internal predecessors, (366), 184 states have call successors, (184), 69 states have call predecessors, (184), 74 states have return successors, (233), 183 states have call predecessors, (233), 182 states have call successors, (233) [2023-12-02 16:47:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 783 transitions. [2023-12-02 16:47:06,982 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 783 transitions. Word has length 276 [2023-12-02 16:47:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:06,982 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 783 transitions. [2023-12-02 16:47:06,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 21.666666666666668) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-12-02 16:47:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 783 transitions. [2023-12-02 16:47:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-12-02 16:47:06,986 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:06,986 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:47:06,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:47:07,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 16:47:07,187 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:07,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1431377552, now seen corresponding path program 3 times [2023-12-02 16:47:07,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283124745] [2023-12-02 16:47:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:07,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:47:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264732203] [2023-12-02 16:47:07,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:47:07,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:07,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:07,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:47:07,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:47:07,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:47:07,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:47:07,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 16:47:07,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:10,190 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| Int)) (and (exists ((aws_hash_table_is_valid_~map.offset Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3|) aws_hash_table_is_valid_~map.offset) 0))) (not (= |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| 0)))) (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| Int) (aws_hash_table_is_valid_~map.offset Int)) (and (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3|) aws_hash_table_is_valid_~map.offset) 0)) (not (= aws_hash_table_is_valid_~map.offset 0)))) (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| Int) (aws_hash_table_is_valid_~map.offset Int)) (and (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3|) aws_hash_table_is_valid_~map.offset) 0)) (not (= aws_hash_table_is_valid_~map.offset 0)))) (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| Int)) (and (exists ((aws_hash_table_is_valid_~map.offset Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3|) aws_hash_table_is_valid_~map.offset) 0))) (not (= |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_3| 0))))) is different from true [2023-12-02 16:47:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-12-02 16:47:10,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:47:10,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283124745] [2023-12-02 16:47:10,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:47:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264732203] [2023-12-02 16:47:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264732203] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:10,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:10,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 16:47:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784366401] [2023-12-02 16:47:10,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:47:10,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:47:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=44, Unknown=1, NotChecked=12, Total=72 [2023-12-02 16:47:10,396 INFO L87 Difference]: Start difference. First operand 567 states and 783 transitions. Second operand has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 5 states have call successors, (38) [2023-12-02 16:47:14,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:47:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:14,787 INFO L93 Difference]: Finished difference Result 911 states and 1307 transitions. [2023-12-02 16:47:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:47:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 5 states have call successors, (38) Word has length 282 [2023-12-02 16:47:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:14,791 INFO L225 Difference]: With dead ends: 911 [2023-12-02 16:47:14,791 INFO L226 Difference]: Without dead ends: 576 [2023-12-02 16:47:14,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2023-12-02 16:47:14,793 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 96 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:47:14,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1806 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 396 Invalid, 1 Unknown, 350 Unchecked, 4.2s Time] [2023-12-02 16:47:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-12-02 16:47:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2023-12-02 16:47:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 313 states have (on average 1.1853035143769968) internal successors, (371), 318 states have internal predecessors, (371), 186 states have call successors, (186), 71 states have call predecessors, (186), 74 states have return successors, (220), 184 states have call predecessors, (220), 184 states have call successors, (220) [2023-12-02 16:47:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 777 transitions. [2023-12-02 16:47:14,828 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 777 transitions. Word has length 282 [2023-12-02 16:47:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:14,828 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 777 transitions. [2023-12-02 16:47:14,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 5 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 5 states have call successors, (38) [2023-12-02 16:47:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 777 transitions. [2023-12-02 16:47:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-12-02 16:47:14,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:14,831 INFO L195 NwaCegarLoop]: trace histogram [17, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:47:14,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 16:47:15,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 16:47:15,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:15,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 560026663, now seen corresponding path program 4 times [2023-12-02 16:47:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124808649] [2023-12-02 16:47:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:15,130 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:47:15,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909452511] [2023-12-02 16:47:15,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:47:15,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:15,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:15,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:47:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 16:47:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:15,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 3739 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:47:15,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2023-12-02 16:47:16,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:47:16,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124808649] [2023-12-02 16:47:16,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:47:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909452511] [2023-12-02 16:47:16,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909452511] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:16,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:16,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:47:16,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296944159] [2023-12-02 16:47:16,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:16,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:47:16,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:16,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:47:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:47:16,047 INFO L87 Difference]: Start difference. First operand 574 states and 777 transitions. Second operand has 6 states, 3 states have (on average 23.333333333333332) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2023-12-02 16:47:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:16,657 INFO L93 Difference]: Finished difference Result 900 states and 1243 transitions. [2023-12-02 16:47:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:47:16,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 23.333333333333332) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 294 [2023-12-02 16:47:16,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:16,661 INFO L225 Difference]: With dead ends: 900 [2023-12-02 16:47:16,662 INFO L226 Difference]: Without dead ends: 574 [2023-12-02 16:47:16,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 289 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 16:47:16,664 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:47:16,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1399 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:47:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-12-02 16:47:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2023-12-02 16:47:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 313 states have (on average 1.1853035143769968) internal successors, (371), 318 states have internal predecessors, (371), 186 states have call successors, (186), 71 states have call predecessors, (186), 74 states have return successors, (218), 184 states have call predecessors, (218), 184 states have call successors, (218) [2023-12-02 16:47:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 775 transitions. [2023-12-02 16:47:16,697 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 775 transitions. Word has length 294 [2023-12-02 16:47:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:16,697 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 775 transitions. [2023-12-02 16:47:16,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 23.333333333333332) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2023-12-02 16:47:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 775 transitions. [2023-12-02 16:47:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-12-02 16:47:16,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:16,701 INFO L195 NwaCegarLoop]: trace histogram [17, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:47:16,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 16:47:16,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 16:47:16,902 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:16,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash -825876255, now seen corresponding path program 5 times [2023-12-02 16:47:16,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:16,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332462584] [2023-12-02 16:47:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:16,996 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:47:16,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184397954] [2023-12-02 16:47:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:47:16,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:16,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:16,998 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:47:17,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a32d48-8b6f-4f22-98a4-8ce27f77cd2c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 16:47:19,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 16:47:19,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:47:19,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 202 conjunts are in the unsatisfiable core [2023-12-02 16:47:19,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:20,049 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 16:47:20,059 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-12-02 16:47:20,087 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-02 16:47:20,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 45 [2023-12-02 16:47:20,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 22 [2023-12-02 16:47:20,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 16:47:21,213 INFO L349 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2023-12-02 16:47:21,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 302 treesize of output 281 [2023-12-02 16:47:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:47:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:47:21,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2023-12-02 16:47:21,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 21 [2023-12-02 16:47:21,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2023-12-02 16:47:21,297 INFO L349 Elim1Store]: treesize reduction 101, result has 1.0 percent of original size [2023-12-02 16:47:21,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 389 treesize of output 339 [2023-12-02 16:47:21,316 INFO L349 Elim1Store]: treesize reduction 101, result has 1.0 percent of original size [2023-12-02 16:47:21,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 419 treesize of output 359 [2023-12-02 16:47:21,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 16:47:21,635 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 17 treesize of output 9 [2023-12-02 16:47:21,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 16:47:21,889 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 25 treesize of output 21 [2023-12-02 16:47:21,891 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 21 treesize of output 17 [2023-12-02 16:47:21,893 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 17 treesize of output 11 [2023-12-02 16:47:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 327 proven. 27 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-12-02 16:47:22,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:47:24,262 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 34 treesize of output 30 [2023-12-02 16:47:24,432 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 34 treesize of output 30 [2023-12-02 16:47:24,932 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 38 treesize of output 34 [2023-12-02 16:47:25,312 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|))) (and (forall ((v_ArrVal_3426 Int) (v_ArrVal_3421 (Array Int Int)) (v_ArrVal_3422 (Array Int Int)) (v_ArrVal_3423 (Array Int Int)) (v_ArrVal_3424 (Array Int Int)) (v_ArrVal_3425 (Array Int Int))) (or (not (= (let ((.cse1 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|) 8))) (store (select |c_#memory_int| .cse0) .cse1 (select v_ArrVal_3421 .cse1))) v_ArrVal_3421)) (< 0 (mod (+ 10 (* (let ((.cse5 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3423))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3422)) (.cse3 (select (select .cse5 |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_int| .cse0 v_ArrVal_3421))) (store .cse2 .cse3 (store (select .cse2 .cse3) (select (select .cse4 |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|) v_ArrVal_3426))) (select (select (store .cse5 .cse3 v_ArrVal_3424) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|)) (+ (select (select (store .cse4 .cse3 v_ArrVal_3425) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|) 40)))) 3)) 2305843009213693952)))) (forall ((v_ArrVal_3422 (Array Int Int)) (v_ArrVal_3423 (Array Int Int)) (v_ArrVal_3424 (Array Int Int)) (v_ArrVal_3425 (Array Int Int))) (let ((.cse7 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3423))) (let ((.cse6 (select (select .cse7 |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|))) (or (not (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_3422) .cse6 v_ArrVal_3425) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|) 0)) (not (= (select (select (store .cse7 .cse6 v_ArrVal_3424) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.base|) |c_ULTIMATE.start_aws_hash_table_eq_harness_~#map_a~0#1.offset|) 0)))))) (<= 0 |c_#StackHeapBarrier|))) is different from false [2023-12-02 16:47:25,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:25,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332462584] [2023-12-02 16:47:25,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:47:25,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184397954] [2023-12-02 16:47:25,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184397954] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:47:25,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1322818914] [2023-12-02 16:47:25,370 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2023-12-02 16:47:25,370 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:47:25,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:47:25,379 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:47:25,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:48:34,516 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 16:48:34,591 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 16:50:10,484 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_allocated_hash_table with input of size 2324 for LOIs [2023-12-02 16:51:45,338 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 136 for LOIs [2023-12-02 16:51:46,046 INFO L197 IcfgInterpreter]: Interpreting procedure aws_hash_table_get_entry_count with input of size 153 for LOIs [2023-12-02 16:51:46,323 INFO L197 IcfgInterpreter]: Interpreting procedure save_byte_from_hash_table with input of size 225 for LOIs [2023-12-02 16:51:47,407 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 2325 for LOIs [2023-12-02 16:52:01,151 INFO L197 IcfgInterpreter]: Interpreting procedure hash_table_state_required_bytes with input of size 40 for LOIs [2023-12-02 16:52:01,635 INFO L197 IcfgInterpreter]: Interpreting procedure aws_mul_size_checked with input of size 79 for LOIs [2023-12-02 16:52:02,234 INFO L197 IcfgInterpreter]: Interpreting procedure __CPROVER_overflow_mult with input of size 61 for LOIs [2023-12-02 16:52:02,246 INFO L197 IcfgInterpreter]: Interpreting procedure aws_raise_error with input of size 74 for LOIs [2023-12-02 16:52:02,257 INFO L197 IcfgInterpreter]: Interpreting procedure aws_add_size_checked with input of size 72 for LOIs [2023-12-02 16:52:02,441 INFO L197 IcfgInterpreter]: Interpreting procedure __CPROVER_overflow_plus with input of size 54 for LOIs [2023-12-02 16:52:02,455 INFO L197 IcfgInterpreter]: Interpreting procedure bounded_malloc with input of size 83 for LOIs [2023-12-02 16:52:02,777 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-12-02 16:52:02,781 INFO L197 IcfgInterpreter]: Interpreting procedure aws_hash_table_is_valid with input of size 40 for LOIs [2023-12-02 16:52:04,762 INFO L197 IcfgInterpreter]: Interpreting procedure hash_table_state_is_valid with input of size 55 for LOIs [2023-12-02 16:52:05,552 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 16:52:05,652 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 16:52:09,515 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 16:52:10,721 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_power_of_two with input of size 36 for LOIs [2023-12-02 16:52:10,765 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:53:18,544 WARN L293 SmtUtils]: Spent 59.01s on a formula simplification. DAG size of input: 2137 DAG size of output: 2135 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:59:22,517 WARN L293 SmtUtils]: Spent 5.97m on a formula simplification. DAG size of input: 2324 DAG size of output: 2298 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)