./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/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_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/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_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/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 f24a61d23dc63fa137ac17d2eae1e2d1b68ccac0bb4c672bf225a31504faa393 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:25:59,055 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:25:59,124 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 12:25:59,129 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:25:59,129 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:25:59,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:25:59,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:25:59,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:25:59,154 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:25:59,155 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:25:59,155 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:25:59,156 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:25:59,157 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:25:59,157 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:25:59,158 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:25:59,158 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:25:59,159 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:25:59,159 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:25:59,160 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:25:59,160 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:25:59,161 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:25:59,162 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:25:59,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:25:59,163 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:25:59,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:25:59,164 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:25:59,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:25:59,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:25:59,165 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:25:59,166 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:25:59,166 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:25:59,167 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:25:59,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:25:59,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:25:59,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:25:59,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:25:59,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:25:59,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:25:59,168 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:25:59,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:25:59,169 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:25:59,169 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:25:59,169 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:25:59,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:25:59,170 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_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24a61d23dc63fa137ac17d2eae1e2d1b68ccac0bb4c672bf225a31504faa393 [2023-12-02 12:25:59,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:25:59,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:25:59,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:25:59,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:25:59,419 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:25:59,420 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i [2023-12-02 12:26:02,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:26:02,652 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:26:02,653 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i [2023-12-02 12:26:02,683 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/data/33b71fd5d/7e9cdbd9b198458a8d2d9d8bd8be0da8/FLAG5de39d3d7 [2023-12-02 12:26:02,697 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/data/33b71fd5d/7e9cdbd9b198458a8d2d9d8bd8be0da8 [2023-12-02 12:26:02,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:26:02,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:26:02,702 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:26:02,702 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:26:02,706 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:26:02,707 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:26:02" (1/1) ... [2023-12-02 12:26:02,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b36db85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:02, skipping insertion in model container [2023-12-02 12:26:02,708 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:26:02" (1/1) ... [2023-12-02 12:26:02,811 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:26:03,038 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_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4494,4507] [2023-12-02 12:26:03,045 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_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4554,4567] [2023-12-02 12:26:04,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,007 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,007 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,009 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,011 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,030 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,031 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,033 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,034 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,037 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,038 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,039 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,040 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,467 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 12:26:04,468 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 12:26:04,470 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 12:26:04,471 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 12:26:04,473 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 12:26:04,473 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 12:26:04,474 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 12:26:04,475 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 12:26:04,475 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 12:26:04,476 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 12:26:04,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:26:04,691 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:26:04,723 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_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4494,4507] [2023-12-02 12:26:04,724 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_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness_negated.i[4554,4567] [2023-12-02 12:26:04,784 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,784 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,785 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,786 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,787 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,799 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,800 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,802 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,802 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,804 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,805 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,806 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,806 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:26:04,858 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 12:26:04,860 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 12:26:04,861 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 12:26:04,862 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 12:26:04,864 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 12:26:04,865 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 12:26:04,866 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 12:26:04,866 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 12:26:04,867 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 12:26:04,868 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 12:26:04,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:26:05,153 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,154 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,154 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,154 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,154 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,154 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,155 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,155 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,155 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,155 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,155 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,155 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,156 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,156 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,156 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,156 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:26:05,162 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:26:05,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05 WrapperNode [2023-12-02 12:26:05,163 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:26:05,164 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:26:05,164 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:26:05,164 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:26:05,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,273 INFO L138 Inliner]: procedures = 678, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2023-12-02 12:26:05,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:26:05,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:26:05,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:26:05,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:26:05,283 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,287 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,288 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:26:05,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:26:05,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:26:05,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:26:05,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (1/1) ... [2023-12-02 12:26:05,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:26:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:05,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:26:05,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:26:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:26:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 12:26:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 12:26:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-12-02 12:26:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-12-02 12:26:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:26:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-12-02 12:26:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-12-02 12:26:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:26:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:26:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:26:05,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:26:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 12:26:05,406 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 12:26:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 12:26:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 12:26:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 12:26:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 12:26:05,407 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 12:26:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:26:05,620 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:26:05,623 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:26:05,817 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:26:05,917 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:26:05,917 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 12:26:05,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:26:05 BoogieIcfgContainer [2023-12-02 12:26:05,919 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:26:05,921 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:26:05,921 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:26:05,924 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:26:05,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:26:02" (1/3) ... [2023-12-02 12:26:05,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41527476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:26:05, skipping insertion in model container [2023-12-02 12:26:05,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:26:05" (2/3) ... [2023-12-02 12:26:05,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41527476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:26:05, skipping insertion in model container [2023-12-02 12:26:05,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:26:05" (3/3) ... [2023-12-02 12:26:05,927 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness_negated.i [2023-12-02 12:26:05,942 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:26:05,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:26:05,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:26:05,991 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;@603b02f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:26:05,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:26:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 12:26:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 12:26:06,003 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:06,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 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 12:26:06,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:06,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:06,009 INFO L85 PathProgramCache]: Analyzing trace with hash 7246546, now seen corresponding path program 1 times [2023-12-02 12:26:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:06,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336260728] [2023-12-02 12:26:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:26:06,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:06,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336260728] [2023-12-02 12:26:06,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336260728] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:06,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261471201] [2023-12-02 12:26:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:06,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:06,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:06,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:06,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:26:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:06,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:26:06,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:26:06,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:06,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261471201] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:06,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:06,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-12-02 12:26:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261154624] [2023-12-02 12:26:06,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:06,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:26:06,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:26:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:26:06,978 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 12:26:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:07,093 INFO L93 Difference]: Finished difference Result 83 states and 115 transitions. [2023-12-02 12:26:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:26:07,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2023-12-02 12:26:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:07,104 INFO L225 Difference]: With dead ends: 83 [2023-12-02 12:26:07,104 INFO L226 Difference]: Without dead ends: 45 [2023-12-02 12:26:07,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:26:07,111 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:07,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 174 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-02 12:26:07,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-12-02 12:26:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2023-12-02 12:26:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2023-12-02 12:26:07,152 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 37 [2023-12-02 12:26:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:07,153 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2023-12-02 12:26:07,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 12:26:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2023-12-02 12:26:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 12:26:07,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:07,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:26:07,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:26:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:07,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:07,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:07,359 INFO L85 PathProgramCache]: Analyzing trace with hash -458104946, now seen corresponding path program 1 times [2023-12-02 12:26:07,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:07,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940603941] [2023-12-02 12:26:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:07,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:26:07,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940603941] [2023-12-02 12:26:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940603941] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249887732] [2023-12-02 12:26:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:07,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:07,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:07,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:26:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:07,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:26:07,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:26:07,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:07,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249887732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:07,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:07,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 12:26:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487211802] [2023-12-02 12:26:07,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:07,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:26:07,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:26:07,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:26:07,927 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:26:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:08,100 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2023-12-02 12:26:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:26:08,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2023-12-02 12:26:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:08,103 INFO L225 Difference]: With dead ends: 84 [2023-12-02 12:26:08,103 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 12:26:08,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:26:08,106 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:08,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 150 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 12:26:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-12-02 12:26:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2023-12-02 12:26:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-12-02 12:26:08,120 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 39 [2023-12-02 12:26:08,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:08,121 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-12-02 12:26:08,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:26:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-12-02 12:26:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 12:26:08,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:08,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:26:08,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:26:08,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:08,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:08,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash -170515594, now seen corresponding path program 1 times [2023-12-02 12:26:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:08,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601591059] [2023-12-02 12:26:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:26:08,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:08,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601591059] [2023-12-02 12:26:08,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601591059] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:08,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9885058] [2023-12-02 12:26:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:08,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:08,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:08,600 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:08,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:26:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:08,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:26:08,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:26:08,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:08,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9885058] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:08,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:08,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-12-02 12:26:08,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761149490] [2023-12-02 12:26:08,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:08,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:26:08,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:08,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:26:08,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:26:08,895 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:26:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:09,151 INFO L93 Difference]: Finished difference Result 97 states and 133 transitions. [2023-12-02 12:26:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:26:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2023-12-02 12:26:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:09,153 INFO L225 Difference]: With dead ends: 97 [2023-12-02 12:26:09,154 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 12:26:09,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:26:09,156 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:09,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 176 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:26:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 12:26:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2023-12-02 12:26:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2023-12-02 12:26:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2023-12-02 12:26:09,169 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 41 [2023-12-02 12:26:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:09,169 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2023-12-02 12:26:09,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:26:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2023-12-02 12:26:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 12:26:09,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:09,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:26:09,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 12:26:09,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:09,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:09,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1610590433, now seen corresponding path program 1 times [2023-12-02 12:26:09,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:09,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348954510] [2023-12-02 12:26:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:09,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:26:09,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:09,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348954510] [2023-12-02 12:26:09,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348954510] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:09,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724406800] [2023-12-02 12:26:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:09,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:09,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:09,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:09,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:26:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:09,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:26:09,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 12:26:09,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:09,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724406800] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:09,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:09,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-12-02 12:26:09,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243473357] [2023-12-02 12:26:09,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:09,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:26:09,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:26:09,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:26:09,805 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:26:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:09,858 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2023-12-02 12:26:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:26:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-12-02 12:26:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:09,861 INFO L225 Difference]: With dead ends: 96 [2023-12-02 12:26:09,861 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 12:26:09,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:26:09,863 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:09,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:26:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 12:26:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-12-02 12:26:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2023-12-02 12:26:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-12-02 12:26:09,875 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 42 [2023-12-02 12:26:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:09,875 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-12-02 12:26:09,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:26:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-12-02 12:26:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 12:26:09,877 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:09,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:26:09,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:26:10,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:10,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:10,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:10,081 INFO L85 PathProgramCache]: Analyzing trace with hash 95668525, now seen corresponding path program 1 times [2023-12-02 12:26:10,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:10,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990449053] [2023-12-02 12:26:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:10,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:26:10,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:10,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990449053] [2023-12-02 12:26:10,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990449053] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:10,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453853150] [2023-12-02 12:26:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:10,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:10,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:10,322 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:10,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:26:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:10,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:26:10,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:26:10,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:10,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453853150] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:10,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:10,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 12:26:10,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926352006] [2023-12-02 12:26:10,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:10,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:26:10,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:26:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:26:10,538 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 12:26:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:10,651 INFO L93 Difference]: Finished difference Result 99 states and 134 transitions. [2023-12-02 12:26:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:26:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2023-12-02 12:26:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:10,653 INFO L225 Difference]: With dead ends: 99 [2023-12-02 12:26:10,653 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 12:26:10,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:26:10,655 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:10,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 224 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 12:26:10,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2023-12-02 12:26:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2023-12-02 12:26:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2023-12-02 12:26:10,667 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 45 [2023-12-02 12:26:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:10,667 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2023-12-02 12:26:10,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 12:26:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2023-12-02 12:26:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 12:26:10,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:10,670 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:26:10,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:26:10,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:10,873 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:10,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash -570154667, now seen corresponding path program 1 times [2023-12-02 12:26:10,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:10,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700443763] [2023-12-02 12:26:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:10,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:26:11,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:11,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700443763] [2023-12-02 12:26:11,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700443763] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:11,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213665928] [2023-12-02 12:26:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:11,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:11,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:11,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:26:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:11,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 12:26:11,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:26:11,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:11,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213665928] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:11,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:11,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 12:26:11,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625117746] [2023-12-02 12:26:11,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:11,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:26:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:26:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:26:11,968 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:26:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:12,112 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2023-12-02 12:26:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:26:12,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 47 [2023-12-02 12:26:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:12,114 INFO L225 Difference]: With dead ends: 102 [2023-12-02 12:26:12,114 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 12:26:12,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:26:12,116 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:12,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 258 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 12:26:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-12-02 12:26:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2023-12-02 12:26:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2023-12-02 12:26:12,127 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 47 [2023-12-02 12:26:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:12,127 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2023-12-02 12:26:12,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:26:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2023-12-02 12:26:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 12:26:12,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:12,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 12:26:12,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 12:26:12,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 12:26:12,337 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:12,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:12,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1114499808, now seen corresponding path program 1 times [2023-12-02 12:26:12,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:12,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019055916] [2023-12-02 12:26:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:26:12,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019055916] [2023-12-02 12:26:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019055916] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82238832] [2023-12-02 12:26:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:12,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:12,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:12,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:26:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:12,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:26:12,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:26:12,864 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:12,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82238832] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:12,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:12,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-12-02 12:26:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479183236] [2023-12-02 12:26:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:12,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:26:12,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:26:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:26:12,867 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 12:26:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:12,938 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2023-12-02 12:26:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:26:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 48 [2023-12-02 12:26:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:12,940 INFO L225 Difference]: With dead ends: 94 [2023-12-02 12:26:12,940 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 12:26:12,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:26:12,942 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:12,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 12:26:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-02 12:26:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2023-12-02 12:26:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2023-12-02 12:26:12,951 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 48 [2023-12-02 12:26:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:12,951 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2023-12-02 12:26:12,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 12:26:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2023-12-02 12:26:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 12:26:12,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:12,953 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 12:26:12,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:26:13,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:13,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:13,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1453084892, now seen corresponding path program 1 times [2023-12-02 12:26:13,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:13,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120194887] [2023-12-02 12:26:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:26:13,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:13,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120194887] [2023-12-02 12:26:13,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120194887] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:13,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614145685] [2023-12-02 12:26:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:13,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:13,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:13,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:13,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:26:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:13,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:26:13,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:26:13,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:13,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614145685] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:13,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:13,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2023-12-02 12:26:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730635949] [2023-12-02 12:26:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:13,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:26:13,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:26:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:26:13,859 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:26:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:14,018 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2023-12-02 12:26:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:26:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2023-12-02 12:26:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:14,020 INFO L225 Difference]: With dead ends: 101 [2023-12-02 12:26:14,020 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 12:26:14,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:26:14,022 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:14,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 179 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 12:26:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-02 12:26:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 37 states have internal predecessors, (40), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2023-12-02 12:26:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2023-12-02 12:26:14,031 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 50 [2023-12-02 12:26:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:14,031 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2023-12-02 12:26:14,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:26:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2023-12-02 12:26:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 12:26:14,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:14,033 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 12:26:14,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:26:14,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:14,237 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:14,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash -53231492, now seen corresponding path program 1 times [2023-12-02 12:26:14,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:14,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436215552] [2023-12-02 12:26:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:14,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:26:14,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436215552] [2023-12-02 12:26:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436215552] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293753324] [2023-12-02 12:26:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:14,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:14,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:14,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:26:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:14,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:26:14,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:26:14,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293753324] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:14,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:14,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2023-12-02 12:26:14,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260603615] [2023-12-02 12:26:14,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:14,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:26:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:26:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-12-02 12:26:14,928 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:26:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:15,125 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2023-12-02 12:26:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:26:15,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2023-12-02 12:26:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:15,127 INFO L225 Difference]: With dead ends: 101 [2023-12-02 12:26:15,127 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 12:26:15,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:26:15,128 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:15,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 201 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 12:26:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2023-12-02 12:26:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2) internal successors, (36), 33 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2023-12-02 12:26:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-12-02 12:26:15,136 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 52 [2023-12-02 12:26:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:15,136 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-12-02 12:26:15,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:26:15,136 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-12-02 12:26:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 12:26:15,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:15,137 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:26:15,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:26:15,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:15,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:15,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1504672411, now seen corresponding path program 1 times [2023-12-02 12:26:15,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:15,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359188692] [2023-12-02 12:26:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:15,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 12:26:15,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:15,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359188692] [2023-12-02 12:26:15,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359188692] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:15,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560910929] [2023-12-02 12:26:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:15,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:15,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:15,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:15,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:26:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:15,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:26:15,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 12:26:15,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:15,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560910929] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:15,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:15,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 12:26:15,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365294928] [2023-12-02 12:26:15,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:15,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:26:15,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:15,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:26:15,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:26:15,815 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 12:26:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:15,901 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2023-12-02 12:26:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:26:15,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 56 [2023-12-02 12:26:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:15,903 INFO L225 Difference]: With dead ends: 91 [2023-12-02 12:26:15,903 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 12:26:15,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:26:15,904 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:15,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 214 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 12:26:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2023-12-02 12:26:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 34 states have internal predecessors, (37), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2023-12-02 12:26:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2023-12-02 12:26:15,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 56 [2023-12-02 12:26:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:15,913 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2023-12-02 12:26:15,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 12:26:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2023-12-02 12:26:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 12:26:15,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:15,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-12-02 12:26:15,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 12:26:16,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:16,121 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:16,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:16,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1910770301, now seen corresponding path program 2 times [2023-12-02 12:26:16,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:16,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571654938] [2023-12-02 12:26:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:16,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 12:26:16,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:16,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571654938] [2023-12-02 12:26:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571654938] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:16,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977667089] [2023-12-02 12:26:16,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:26:16,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:16,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:16,794 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:16,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:26:16,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 12:26:16,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:26:16,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:26:16,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 12:26:17,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:17,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977667089] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:17,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:17,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2023-12-02 12:26:17,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074144951] [2023-12-02 12:26:17,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:17,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:26:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:26:17,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:26:17,061 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 12:26:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:17,144 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-12-02 12:26:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:26:17,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 58 [2023-12-02 12:26:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:17,145 INFO L225 Difference]: With dead ends: 62 [2023-12-02 12:26:17,145 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 12:26:17,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-12-02 12:26:17,147 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:17,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 208 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 12:26:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-12-02 12:26:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2023-12-02 12:26:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2023-12-02 12:26:17,155 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 58 [2023-12-02 12:26:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:17,155 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2023-12-02 12:26:17,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 12:26:17,156 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2023-12-02 12:26:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 12:26:17,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:17,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-12-02 12:26:17,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 12:26:17,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:17,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:17,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash 102250270, now seen corresponding path program 1 times [2023-12-02 12:26:17,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:17,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659443134] [2023-12-02 12:26:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:17,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 12:26:17,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659443134] [2023-12-02 12:26:17,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659443134] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667348211] [2023-12-02 12:26:17,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:17,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:17,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:17,893 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:17,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:26:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:18,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 12:26:18,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:26:18,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:18,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667348211] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:18,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:18,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2023-12-02 12:26:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885186340] [2023-12-02 12:26:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:18,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:26:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:26:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2023-12-02 12:26:18,243 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 12:26:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:18,363 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2023-12-02 12:26:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:26:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2023-12-02 12:26:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:18,364 INFO L225 Difference]: With dead ends: 104 [2023-12-02 12:26:18,364 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 12:26:18,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:26:18,366 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 4 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:18,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 246 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:26:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 12:26:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-12-02 12:26:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-12-02 12:26:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-12-02 12:26:18,373 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 64 [2023-12-02 12:26:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:18,373 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-12-02 12:26:18,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 12:26:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-12-02 12:26:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 12:26:18,374 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:18,374 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:26:18,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:26:18,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:18,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:18,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1277466245, now seen corresponding path program 1 times [2023-12-02 12:26:18,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:18,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163329838] [2023-12-02 12:26:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:18,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 12:26:21,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:21,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163329838] [2023-12-02 12:26:21,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163329838] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:21,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599669466] [2023-12-02 12:26:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:21,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:21,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:21,938 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:21,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:26:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:22,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-02 12:26:22,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:22,326 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 12:26:22,327 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-12-02 12:26:22,339 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 8 treesize of output 1 [2023-12-02 12:26:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:26:43,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:26:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 12:26:47,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599669466] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:26:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300251033] [2023-12-02 12:26:47,265 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 12:26:47,265 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:26:47,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:26:47,271 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:26:47,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:26:50,103 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 217 for LOIs [2023-12-02 12:26:50,541 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 178 for LOIs [2023-12-02 12:26:50,836 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-12-02 12:26:50,838 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 12:26:50,850 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2023-12-02 12:26:50,880 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:27:33,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4780#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (or (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_aws_linked_list_rend_#t~ret339#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_10| Int)) (and (exists ((|v_#memory_real_4| (Array Int (Array Int Real))) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_real_83| (Array Int (Array Int Real))) (|v_#memory_real_84| (Array Int (Array Int Real)))) (and (= (store |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 16 (select (select |v_#memory_real_84| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 16))) |v_#memory_real_84|) (= (store |v_#memory_real_84| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (select |v_#memory_real_84| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 0 (select (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 0))) |v_#memory_real_27|) (= (store |v_#memory_real_83| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (select |v_#memory_real_83| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 8 (select (select |v_#memory_real_4| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 8))) |v_#memory_real_4|) (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (select |v_#memory_real_27| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 24 (select (select |#memory_real| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 24)))))) (exists ((|v_#length_14| (Array Int Int))) (and (= (select |v_#length_14| 3) 12) (= |#length| (store |v_#length_14| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| 32)) (= 2 (select |v_#length_14| 1)) (= 31 (select |v_#length_14| 2)) (= 40 (select |v_#length_14| 4)))) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) (exists ((|v_#memory_$Pointer$.offset_61| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_$Pointer$.offset_61| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_#memory_$Pointer$.offset_61| 4) 24)) (= 0 (select (select |v_#memory_$Pointer$.offset_61| 4) 32)) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (store (store (store (select |v_#memory_$Pointer$.offset_61| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 8 0) 16 0) 0 16) 24 0))) (= (select (select |v_#memory_$Pointer$.offset_61| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= (select (select |v_#memory_$Pointer$.offset_61| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|))) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_7| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_19|) (<= |v_ULTIMATE.start_aws_linked_list_rend_#t~ret339#1_BEFORE_CALL_9| 1) (exists ((|v_#memory_$Pointer$.base_59| (Array Int (Array Int Int)))) (and (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_#memory_$Pointer$.base_59| 4) 8)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_#memory_$Pointer$.base_59| 4) 24)) (= (store |v_#memory_$Pointer$.base_59| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (store (store (store (select |v_#memory_$Pointer$.base_59| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 8 0) 16 0) 0 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 24 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|)) |#memory_$Pointer$.base|) (= (select (select |v_#memory_$Pointer$.base_59| 4) 32) 0) (= (select (select |v_#memory_$Pointer$.base_59| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_#memory_$Pointer$.base_59| 4) 16)))) (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod |v_ULTIMATE.start_aws_linked_list_rend_#t~ret339#1_BEFORE_CALL_9| 256) 0)) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_18| Int)) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_18| 18446744073709551616) 0)) (exists ((|v_#valid_28| (Array Int Int))) (and (= (select |v_#valid_28| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 0) (= (select |v_#valid_28| 3) 1) (= (select |v_#valid_28| 1) 1) (= (select |v_#valid_28| 2) 1) (= (select |v_#valid_28| 0) 0) (= (select |v_#valid_28| 4) 1) (= |#valid| (store |v_#valid_28| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| 1)))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int))) (|v_#memory_int_86| (Array Int (Array Int Int))) (|v_#memory_int_87| (Array Int (Array Int Int))) (|v_#memory_int_5| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 24 (select (select |#memory_int| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 24)))) (= 48 (select (select |v_#memory_int_86| 1) 0)) (= |v_#memory_int_87| (store |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 16 (select (select |v_#memory_int_87| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 16)))) (= (store |v_#memory_int_86| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (select |v_#memory_int_86| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 8 (select (select |v_#memory_int_5| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 8))) |v_#memory_int_5|) (= |v_#memory_int_30| (store |v_#memory_int_87| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| (store (select |v_#memory_int_87| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 0 (select (select |v_#memory_int_30| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37|) 0)))) (= (select (select |v_#memory_int_86| 1) 1) 0))) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_#t~ret339#1_BEFORE_CALL_9|) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_37| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_10|) (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_10| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_19|))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_6| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_6|) (= |__VERIFIER_assert_#in~cond| 0) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_6| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_18|)))) (= ~tl_last_error~0 0))' at error location [2023-12-02 12:27:33,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:27:33,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:27:33,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 7] total 42 [2023-12-02 12:27:33,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535364888] [2023-12-02 12:27:33,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:27:33,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 12:27:33,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:27:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 12:27:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=4823, Unknown=19, NotChecked=0, Total=5256 [2023-12-02 12:27:33,336 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 42 states, 38 states have (on average 2.763157894736842) internal successors, (105), 40 states have internal predecessors, (105), 18 states have call successors, (30), 6 states have call predecessors, (30), 14 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 12:27:35,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:27:37,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:27:41,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:27:44,479 WARN L539 Checker$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 12:27:46,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:27:55,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:28:00,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:28:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:01,019 INFO L93 Difference]: Finished difference Result 228 states and 302 transitions. [2023-12-02 12:28:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 12:28:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 2.763157894736842) internal successors, (105), 40 states have internal predecessors, (105), 18 states have call successors, (30), 6 states have call predecessors, (30), 14 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) Word has length 65 [2023-12-02 12:28:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:01,022 INFO L225 Difference]: With dead ends: 228 [2023-12-02 12:28:01,022 INFO L226 Difference]: Without dead ends: 185 [2023-12-02 12:28:01,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 151 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 68.9s TimeCoverageRelationStatistics Valid=1129, Invalid=11733, Unknown=20, NotChecked=0, Total=12882 [2023-12-02 12:28:01,028 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 382 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 170 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:01,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 870 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1918 Invalid, 5 Unknown, 0 Unchecked, 19.3s Time] [2023-12-02 12:28:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-02 12:28:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 154. [2023-12-02 12:28:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.21875) internal successors, (117), 103 states have internal predecessors, (117), 36 states have call successors, (36), 16 states have call predecessors, (36), 21 states have return successors, (47), 34 states have call predecessors, (47), 33 states have call successors, (47) [2023-12-02 12:28:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 200 transitions. [2023-12-02 12:28:01,066 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 200 transitions. Word has length 65 [2023-12-02 12:28:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:01,067 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 200 transitions. [2023-12-02 12:28:01,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 2.763157894736842) internal successors, (105), 40 states have internal predecessors, (105), 18 states have call successors, (30), 6 states have call predecessors, (30), 14 states have return successors, (29), 14 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 12:28:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 200 transitions. [2023-12-02 12:28:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 12:28:01,069 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:01,069 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 12:28:01,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:28:01,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 12:28:01,273 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:01,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash -914791617, now seen corresponding path program 1 times [2023-12-02 12:28:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:01,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557513856] [2023-12-02 12:28:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-02 12:28:01,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:01,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557513856] [2023-12-02 12:28:01,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557513856] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:28:01,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:28:01,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:28:01,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054054153] [2023-12-02 12:28:01,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:28:01,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:28:01,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:28:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:28:01,618 INFO L87 Difference]: Start difference. First operand 154 states and 200 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 12:28:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:01,756 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2023-12-02 12:28:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:28:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 67 [2023-12-02 12:28:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:01,759 INFO L225 Difference]: With dead ends: 183 [2023-12-02 12:28:01,759 INFO L226 Difference]: Without dead ends: 181 [2023-12-02 12:28:01,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:28:01,760 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:01,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 253 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:28:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-12-02 12:28:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2023-12-02 12:28:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 121 states have internal predecessors, (132), 39 states have call successors, (39), 19 states have call predecessors, (39), 27 states have return successors, (56), 37 states have call predecessors, (56), 36 states have call successors, (56) [2023-12-02 12:28:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 227 transitions. [2023-12-02 12:28:01,800 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 227 transitions. Word has length 67 [2023-12-02 12:28:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:01,800 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 227 transitions. [2023-12-02 12:28:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 12:28:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 227 transitions. [2023-12-02 12:28:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 12:28:01,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:01,802 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:01,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 12:28:01,803 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:01,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash 960231570, now seen corresponding path program 1 times [2023-12-02 12:28:01,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:01,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716295038] [2023-12-02 12:28:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:01,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:28:02,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:02,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716295038] [2023-12-02 12:28:02,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716295038] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:28:02,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966379519] [2023-12-02 12:28:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:02,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:28:02,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:28:02,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:28:02,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 12:28:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:02,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 12:28:02,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:28:02,900 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-12-02 12:28:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:28:02,906 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 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 12:28:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:28:02,951 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 47 treesize of output 22 [2023-12-02 12:28:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 12:28:03,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:28:03,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:28:03,893 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 45 [2023-12-02 12:28:03,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:28:03,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 12:28:03,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:28:03,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 255 treesize of output 267 [2023-12-02 12:28:03,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:28:03,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 191 [2023-12-02 12:28:04,060 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 6 treesize of output 4 [2023-12-02 12:28:04,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:28:04,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2023-12-02 12:28:04,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 8 treesize of output 6 [2023-12-02 12:28:04,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-12-02 12:28:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:28:04,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966379519] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:28:04,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138956980] [2023-12-02 12:28:04,304 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 12:28:04,305 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:28:04,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:28:04,305 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:28:04,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:28:07,945 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 205 for LOIs [2023-12-02 12:28:08,640 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 1 for LOIs [2023-12-02 12:28:08,736 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-12-02 12:28:08,736 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 95 for LOIs [2023-12-02 12:28:08,748 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 1 for LOIs [2023-12-02 12:28:08,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:28:28,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6389#(and (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_65| Int) (|v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.offset_BEFORE_CALL_20| Int) (|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_51| Int) (|v_ULTIMATE.start_aws_linked_list_rend_~list#1.offset_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.offset_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_aws_linked_list_rend_#t~ret339#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_20| Int)) (and (= |__VERIFIER_assert_#in~cond| 0) (or (and (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.offset_BEFORE_CALL_11| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.offset_BEFORE_CALL_27|) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_61| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_34| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_58| Int) (|v_ULTIMATE.start_aws_linked_list_rend_harness_#t~ret683#1_21| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_34| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_58| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_34|) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_#t~ret683#1_21| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_61| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_34| 16)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_60| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_63| Int) (|v_ULTIMATE.start_aws_linked_list_rend_#t~ret338#1_18| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_36| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_36| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_63| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_36| 16)) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_60| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_36|) (= |v_ULTIMATE.start_aws_linked_list_rend_#t~ret338#1_18| 1))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_20| Int) (|v_#memory_int_30| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| Int) (|v_#memory_int_103| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_11| Int) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_11| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_11| Int) (|v_#memory_$Pointer$.offset_74| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_14| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_29| Int) (|v_#memory_real_100| (Array Int (Array Int Real))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| Int)) (and (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| (store (select |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24) (select (select |#memory_real| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))))) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_65|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_$Pointer$.offset_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| (store (select (store |v_#memory_$Pointer$.offset_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_$Pointer$.offset_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))))) (= (store |v_#memory_real_100| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_real_100| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (select (select |v_#memory_real_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))))) |v_#memory_real_27|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_29|) (= (store |v_#memory_int_103| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_int_103| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (select (select |v_#memory_int_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))))) |v_#memory_int_30|) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_11|) (= (store |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| (store (select |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24) (select (select |#memory_int| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)))) |#memory_int|) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (or (and (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_11| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_11| 20) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19| 0) (= |~#s_can_fail_allocator_static~0.base| 4) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) 24) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_14| 20) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 0) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_51| 0) (= ~tl_last_error~0 0)) (and (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_11| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_11| 20) (= |~#s_can_fail_allocator_static~0.base| 4) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) 24) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_29| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_14| 20) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 0) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_51| 0) (= ~tl_last_error~0 0))) (= (store (store |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| (store (select (store |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)))) |#memory_$Pointer$.base|) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_20| 18446744073709551616) (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_29| 18446744073709551616)))) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_51| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.offset_BEFORE_CALL_20|) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_34| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_61| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_58| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_34| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_58| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_34|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_61| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_34| 16)) (= 1 |v_ULTIMATE.start_aws_linked_list_rend_#t~ret339#1_BEFORE_CALL_10|))) (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.offset_BEFORE_CALL_20| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.offset_BEFORE_CALL_27|) (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_20| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_29|) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_65| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_20|) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_29|)) (and (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.offset_BEFORE_CALL_11| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.offset_BEFORE_CALL_27|) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_62| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_35| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_35| Int) (|v_ULTIMATE.start_aws_linked_list_rend_harness_#t~ret683#1_21| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_59| Int)) (and (= |v_ULTIMATE.start_aws_linked_list_rend_harness_#t~ret683#1_21| 1) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_62| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_35| 16)) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_59| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_35|))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_61| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_34| Int) (|v_ULTIMATE.start_aws_linked_list_rend_#t~ret338#1_18| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_58| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_34| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_58| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_34|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_61| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_34| 16)) (= |v_ULTIMATE.start_aws_linked_list_rend_#t~ret338#1_18| 1))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_20| Int) (|v_#memory_int_30| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| Int) (|v_#memory_int_103| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_11| Int) (|v_#memory_real_27| (Array Int (Array Int Real))) (|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_11| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_11| Int) (|v_#memory_$Pointer$.offset_74| (Array Int (Array Int Int))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_14| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_29| Int) (|v_#memory_real_100| (Array Int (Array Int Real))) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| Int)) (and (= |#memory_real| (store |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| (store (select |v_#memory_real_27| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24) (select (select |#memory_real| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))))) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_65|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_$Pointer$.offset_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| (store (select (store |v_#memory_$Pointer$.offset_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_$Pointer$.offset_74| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19|))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))))) (= (store |v_#memory_real_100| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_real_100| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (select (select |v_#memory_real_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))))) |v_#memory_real_27|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_29|) (= (store |v_#memory_int_103| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_int_103| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (select (select |v_#memory_int_30| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))))) |v_#memory_int_30|) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.base_11|) (= (store |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| (store (select |v_#memory_int_30| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24) (select (select |#memory_int| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)))) |#memory_int|) (<= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (or (and (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_11| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_11| 20) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_19| 0) (= |~#s_can_fail_allocator_static~0.base| 4) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) 24) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_14| 20) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 0) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_51| 0) (= ~tl_last_error~0 0)) (and (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~list#1.offset_11| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_#in~max_length#1_11| 20) (= |~#s_can_fail_allocator_static~0.base| 4) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) 24) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_29| 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~max_length#1_14| 20) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 0) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_51| 0) (= ~tl_last_error~0 0))) (= (store (store |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19| (store (select (store |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) (store (select |v_#memory_$Pointer$.base_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_19|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_19| 24)))) |#memory_$Pointer$.base|) (<= (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~length~1#1_20| 18446744073709551616) (mod |v_ULTIMATE.start_ensure_linked_list_is_allocated_~i~1#1_29| 18446744073709551616)))) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset_BEFORE_CALL_51| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.offset_BEFORE_CALL_20|) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_34| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_61| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_58| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_34| Int)) (and (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_58| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.base_34|) (= |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_61| (+ |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset_34| 16)) (= 1 |v_ULTIMATE.start_aws_linked_list_rend_#t~ret339#1_BEFORE_CALL_10|))) (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.offset_BEFORE_CALL_20| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.offset_BEFORE_CALL_27|) (= |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_20| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_29|) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_65| |v_ULTIMATE.start_aws_linked_list_rend_#in~list#1.base_BEFORE_CALL_20|) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_29|))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))' at error location [2023-12-02 12:28:28,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:28:28,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:28:28,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2023-12-02 12:28:28,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478633767] [2023-12-02 12:28:28,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:28:28,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 12:28:28,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:28,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 12:28:28,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2674, Unknown=26, NotChecked=0, Total=2862 [2023-12-02 12:28:28,509 INFO L87 Difference]: Start difference. First operand 178 states and 227 transitions. Second operand has 32 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 13 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) [2023-12-02 12:28:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:31,700 INFO L93 Difference]: Finished difference Result 263 states and 338 transitions. [2023-12-02 12:28:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-02 12:28:31,700 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 13 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) Word has length 70 [2023-12-02 12:28:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:31,702 INFO L225 Difference]: With dead ends: 263 [2023-12-02 12:28:31,702 INFO L226 Difference]: Without dead ends: 207 [2023-12-02 12:28:31,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=477, Invalid=5659, Unknown=26, NotChecked=0, Total=6162 [2023-12-02 12:28:31,706 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 261 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:31,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 965 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 12:28:31,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-12-02 12:28:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2023-12-02 12:28:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 118 states have (on average 1.194915254237288) internal successors, (141), 129 states have internal predecessors, (141), 40 states have call successors, (40), 20 states have call predecessors, (40), 29 states have return successors, (59), 38 states have call predecessors, (59), 37 states have call successors, (59) [2023-12-02 12:28:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 240 transitions. [2023-12-02 12:28:31,751 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 240 transitions. Word has length 70 [2023-12-02 12:28:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:31,751 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 240 transitions. [2023-12-02 12:28:31,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 13 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (27), 11 states have call predecessors, (27), 13 states have call successors, (27) [2023-12-02 12:28:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 240 transitions. [2023-12-02 12:28:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 12:28:31,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:31,753 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 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 12:28:31,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 12:28:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 12:28:31,954 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:31,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash 568326756, now seen corresponding path program 1 times [2023-12-02 12:28:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:31,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382092740] [2023-12-02 12:28:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:31,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:28:32,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 12:28:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:28:32,133 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 12:28:32,134 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 12:28:32,134 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 12:28:32,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 12:28:32,139 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:32,142 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 12:28:32,181 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret554 could not be translated [2023-12-02 12:28:32,182 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-02 12:28:32,183 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem307 [2023-12-02 12:28:32,183 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem309 [2023-12-02 12:28:32,183 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem305 [2023-12-02 12:28:32,184 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated [2023-12-02 12:28:32,184 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem311 [2023-12-02 12:28:32,184 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated [2023-12-02 12:28:32,184 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated [2023-12-02 12:28:32,184 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated [2023-12-02 12:28:32,185 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated [2023-12-02 12:28:32,186 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret683 could not be translated [2023-12-02 12:28:32,187 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret683 could not be translated [2023-12-02 12:28:32,187 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem311 [2023-12-02 12:28:32,187 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem309 [2023-12-02 12:28:32,187 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated [2023-12-02 12:28:32,188 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem307 [2023-12-02 12:28:32,188 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem305 [2023-12-02 12:28:32,188 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated [2023-12-02 12:28:32,188 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated [2023-12-02 12:28:32,188 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated [2023-12-02 12:28:32,190 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated [2023-12-02 12:28:32,191 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret338 could not be translated [2023-12-02 12:28:32,191 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret338 could not be translated [2023-12-02 12:28:32,192 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated [2023-12-02 12:28:32,192 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated [2023-12-02 12:28:32,193 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem311 [2023-12-02 12:28:32,193 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem305 [2023-12-02 12:28:32,193 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated [2023-12-02 12:28:32,193 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem307 [2023-12-02 12:28:32,193 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem309 [2023-12-02 12:28:32,194 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated [2023-12-02 12:28:32,195 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated [2023-12-02 12:28:32,195 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret339 could not be translated [2023-12-02 12:28:32,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:28:32 BoogieIcfgContainer [2023-12-02 12:28:32,213 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 12:28:32,213 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 12:28:32,213 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 12:28:32,213 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 12:28:32,214 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:26:05" (3/4) ... [2023-12-02 12:28:32,215 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 12:28:32,226 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret554 could not be translated [2023-12-02 12:28:32,227 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-02 12:28:32,227 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem307 [2023-12-02 12:28:32,228 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem305 [2023-12-02 12:28:32,228 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated [2023-12-02 12:28:32,228 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated [2023-12-02 12:28:32,228 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated [2023-12-02 12:28:32,228 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem309 [2023-12-02 12:28:32,228 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated [2023-12-02 12:28:32,229 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem311 [2023-12-02 12:28:32,229 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated [2023-12-02 12:28:32,230 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret683 could not be translated [2023-12-02 12:28:32,230 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret683 could not be translated [2023-12-02 12:28:32,231 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated [2023-12-02 12:28:32,231 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated [2023-12-02 12:28:32,231 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem305 [2023-12-02 12:28:32,231 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated [2023-12-02 12:28:32,232 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem307 [2023-12-02 12:28:32,232 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem309 [2023-12-02 12:28:32,232 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem311 [2023-12-02 12:28:32,232 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated [2023-12-02 12:28:32,233 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated [2023-12-02 12:28:32,233 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret338 could not be translated [2023-12-02 12:28:32,234 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret338 could not be translated [2023-12-02 12:28:32,234 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem309 [2023-12-02 12:28:32,235 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem305 [2023-12-02 12:28:32,235 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated [2023-12-02 12:28:32,235 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated [2023-12-02 12:28:32,235 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem311 [2023-12-02 12:28:32,235 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated [2023-12-02 12:28:32,235 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated [2023-12-02 12:28:32,236 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem307 [2023-12-02 12:28:32,236 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated [2023-12-02 12:28:32,237 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret339 could not be translated [2023-12-02 12:28:32,291 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 12:28:32,291 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 12:28:32,292 INFO L158 Benchmark]: Toolchain (without parser) took 149590.99ms. Allocated memory was 155.2MB in the beginning and 664.8MB in the end (delta: 509.6MB). Free memory was 116.3MB in the beginning and 224.8MB in the end (delta: -108.6MB). Peak memory consumption was 402.6MB. Max. memory is 16.1GB. [2023-12-02 12:28:32,292 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 155.2MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:28:32,293 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2461.07ms. Allocated memory was 155.2MB in the beginning and 220.2MB in the end (delta: 65.0MB). Free memory was 115.8MB in the beginning and 170.7MB in the end (delta: -54.9MB). Peak memory consumption was 87.6MB. Max. memory is 16.1GB. [2023-12-02 12:28:32,293 INFO L158 Benchmark]: Boogie Procedure Inliner took 110.65ms. Allocated memory is still 220.2MB. Free memory was 170.7MB in the beginning and 165.5MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 12:28:32,294 INFO L158 Benchmark]: Boogie Preprocessor took 44.43ms. Allocated memory is still 220.2MB. Free memory was 165.5MB in the beginning and 162.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:28:32,294 INFO L158 Benchmark]: RCFGBuilder took 599.08ms. Allocated memory is still 220.2MB. Free memory was 162.3MB in the beginning and 127.7MB in the end (delta: 34.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2023-12-02 12:28:32,295 INFO L158 Benchmark]: TraceAbstraction took 146291.40ms. Allocated memory was 220.2MB in the beginning and 664.8MB in the end (delta: 444.6MB). Free memory was 127.7MB in the beginning and 232.1MB in the end (delta: -104.4MB). Peak memory consumption was 340.2MB. Max. memory is 16.1GB. [2023-12-02 12:28:32,295 INFO L158 Benchmark]: Witness Printer took 78.09ms. Allocated memory is still 664.8MB. Free memory was 232.1MB in the beginning and 224.8MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 12:28:32,298 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 155.2MB. Free memory is still 97.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2461.07ms. Allocated memory was 155.2MB in the beginning and 220.2MB in the end (delta: 65.0MB). Free memory was 115.8MB in the beginning and 170.7MB in the end (delta: -54.9MB). Peak memory consumption was 87.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 110.65ms. Allocated memory is still 220.2MB. Free memory was 170.7MB in the beginning and 165.5MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.43ms. Allocated memory is still 220.2MB. Free memory was 165.5MB in the beginning and 162.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 599.08ms. Allocated memory is still 220.2MB. Free memory was 162.3MB in the beginning and 127.7MB in the end (delta: 34.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * TraceAbstraction took 146291.40ms. Allocated memory was 220.2MB in the beginning and 664.8MB in the end (delta: 444.6MB). Free memory was 127.7MB in the beginning and 232.1MB in the end (delta: -104.4MB). Peak memory consumption was 340.2MB. Max. memory is 16.1GB. * Witness Printer took 78.09ms. Allocated memory is still 664.8MB. Free memory was 232.1MB in the beginning and 224.8MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret554 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem307 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem309 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem305 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem311 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret683 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret683 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem311 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem309 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem307 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem305 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret338 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret338 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem311 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem305 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem307 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem309 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret339 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret554 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem307 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem305 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem309 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem311 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret683 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret683 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem305 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem307 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem309 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem311 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret338 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret338 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem309 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem305 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short310 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short312 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem311 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short308 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short306 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem307 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret324 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret339 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6901-L6906] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7326] static __thread int tl_last_error = 0; [L7360] CALL aws_linked_list_rend_harness() [L7344] struct aws_linked_list list; [L7346] CALL ensure_linked_list_is_allocated(&list, 20) [L6743] CALL, EXPR nondet_uint64_t() VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L266] return __VERIFIER_nondet_ulong(); [L6743] RET, EXPR nondet_uint64_t() VAL [\old(max_length)=20, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6743] size_t length = nondet_uint64_t(); [L6744] CALL assume_abort_if_not(length <= max_length) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L6744] RET assume_abort_if_not(length <= max_length) VAL [\old(max_length)=20, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6746-L6747] list->head.prev = ((void *)0) [L6749-L6750] list->tail.next = ((void *)0) [L6753] struct aws_linked_list_node *curr = &list->head; [L6755] size_t i = 0; VAL [\old(max_length)=20, curr={6:0}, i=0, length=0, list={6:0}, list={6:0}, max_length=20, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L6755] COND FALSE !(i < length) [L6764] curr->next = &list->tail [L6765] list->tail.prev = curr [L7346] RET ensure_linked_list_is_allocated(&list, 20) [L7349] CALL, EXPR aws_linked_list_is_valid(&list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L7349] RET, EXPR aws_linked_list_is_valid(&list) VAL [list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7349] CALL assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L7349] RET assume_abort_if_not(aws_linked_list_is_valid(&list)) VAL [list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7354] CALL aws_linked_list_rend(&list) [L4824] CALL, EXPR aws_linked_list_is_valid(list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4824] RET, EXPR aws_linked_list_is_valid(list) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4824] CALL assume_abort_if_not((aws_linked_list_is_valid(list))) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L4824] RET assume_abort_if_not((aws_linked_list_is_valid(list))) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4825] const struct aws_linked_list_node *rval = &list->head; VAL [list={6:0}, list={6:0}, rval={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4826] CALL, EXPR aws_linked_list_is_valid(list) VAL [s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4826] RET, EXPR aws_linked_list_is_valid(list) VAL [list={6:0}, list={6:0}, rval={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4826] CALL __VERIFIER_assert(!((aws_linked_list_is_valid(list)))) VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] COND TRUE !cond VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] reach_error() VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 146.2s, OverallIterations: 16, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 32.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 867 SdHoareTripleChecker+Valid, 21.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 828 mSDsluCounter, 4371 SdHoareTripleChecker+Invalid, 21.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3707 mSDsCounter, 322 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4459 IncrementalHoareTripleChecker+Invalid, 4786 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 322 mSolverCounterUnsat, 664 mSDtfsCounter, 4459 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1238 GetRequests, 895 SyntacticMatches, 9 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5598 ImplicationChecksByTransitivity, 92.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=188occurred in iteration=15, InterpolantAutomatonStates: 172, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 85 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 35.9s InterpolantComputationTime, 1565 NumberOfCodeBlocks, 1525 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1599 ConstructedInterpolants, 62 QuantifiedInterpolants, 11525 SizeOfPredicates, 97 NumberOfNonLiveVariables, 4393 ConjunctsInSsa, 305 ConjunctsInUnsatCore, 31 InterpolantComputations, 13 PerfectInterpolantSequences, 697/921 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 12:28:32,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727d6b90-2ee9-4a05-9b3c-a2cd27016e60/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE