./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:22:59,669 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:22:59,730 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-29 01:22:59,734 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:22:59,734 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:22:59,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:22:59,756 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:22:59,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:22:59,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:22:59,758 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:22:59,759 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:22:59,759 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:22:59,760 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:22:59,761 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:22:59,761 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:22:59,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:22:59,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:22:59,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:22:59,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:22:59,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:22:59,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:22:59,765 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:22:59,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:22:59,766 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:22:59,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:22:59,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:22:59,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:22:59,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:22:59,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:22:59,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:22:59,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:22:59,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:22:59,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:22:59,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:22:59,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:22:59,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:22:59,771 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:22:59,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:22:59,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:22:59,772 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2023-11-29 01:22:59,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:23:00,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:23:00,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:23:00,007 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:23:00,007 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:23:00,009 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2023-11-29 01:23:02,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:23:03,173 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:23:03,174 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2023-11-29 01:23:03,213 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/data/0e0bbd87c/d569bbacbd564e5b85e0facfa00cb278/FLAGecd95b8dc [2023-11-29 01:23:03,231 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/data/0e0bbd87c/d569bbacbd564e5b85e0facfa00cb278 [2023-11-29 01:23:03,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:23:03,235 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:23:03,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:23:03,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:23:03,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:23:03,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:23:03" (1/1) ... [2023-11-29 01:23:03,246 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48015bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:03, skipping insertion in model container [2023-11-29 01:23:03,246 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:23:03" (1/1) ... [2023-11-29 01:23:03,378 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:23:03,651 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_3a9d430a-f481-4314-8588-9d695401ca33/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2023-11-29 01:23:03,661 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_3a9d430a-f481-4314-8588-9d695401ca33/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2023-11-29 01:23:04,486 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,487 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,488 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,488 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,490 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,529 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,529 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,535 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,856 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 01:23:04,857 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 01:23:04,858 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 01:23:04,859 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 01:23:04,861 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 01:23:04,862 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 01:23:04,863 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 01:23:04,863 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 01:23:04,864 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 01:23:04,864 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 01:23:04,999 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:04,999 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:23:05,077 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:23:05,089 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_3a9d430a-f481-4314-8588-9d695401ca33/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2023-11-29 01:23:05,089 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_3a9d430a-f481-4314-8588-9d695401ca33/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2023-11-29 01:23:05,142 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,142 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,143 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,143 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,144 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,151 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,152 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,153 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,154 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,193 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 01:23:05,195 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 01:23:05,196 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 01:23:05,197 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 01:23:05,198 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 01:23:05,198 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 01:23:05,199 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 01:23:05,199 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 01:23:05,200 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 01:23:05,201 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 01:23:05,231 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,232 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 01:23:05,239 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-29 01:23:05,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:23:05,575 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,575 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,575 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,575 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,575 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,576 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,576 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,576 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,576 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,576 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,576 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,576 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,577 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,577 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,577 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 01:23:05,585 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:23:05,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05 WrapperNode [2023-11-29 01:23:05,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:23:05,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:23:05,586 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:23:05,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:23:05,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,660 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,721 INFO L138 Inliner]: procedures = 688, calls = 1498, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 596 [2023-11-29 01:23:05,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:23:05,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:23:05,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:23:05,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:23:05,734 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,742 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,813 INFO L175 MemorySlicer]: Split 284 memory accesses to 6 slices as follows [2, 236, 3, 34, 6, 3]. 83 percent of accesses are in the largest equivalence class. The 247 initializations are split as follows [2, 236, 1, 0, 5, 3]. The 6 writes are split as follows [0, 0, 1, 5, 0, 0]. [2023-11-29 01:23:05,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,814 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,847 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,890 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:23:05,903 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:23:05,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:23:05,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:23:05,904 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (1/1) ... [2023-11-29 01:23:05,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:23:05,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:05,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:23:05,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:23:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-29 01:23:05,970 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-29 01:23:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:23:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-29 01:23:05,971 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-29 01:23:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-29 01:23:05,971 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-29 01:23:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-29 01:23:05,971 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-29 01:23:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:23:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:23:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:23:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:23:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 01:23:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 01:23:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-29 01:23:05,972 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-29 01:23:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 01:23:05,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-29 01:23:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:23:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:23:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2023-11-29 01:23:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2023-11-29 01:23:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-29 01:23:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-29 01:23:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-29 01:23:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-29 01:23:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-29 01:23:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-29 01:23:05,974 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-29 01:23:05,974 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-29 01:23:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:23:05,975 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:23:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:23:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 01:23:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 01:23:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 01:23:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 01:23:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-29 01:23:05,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-29 01:23:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 01:23:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 01:23:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 01:23:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-29 01:23:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-29 01:23:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-29 01:23:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-29 01:23:05,976 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-29 01:23:05,976 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-29 01:23:05,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-29 01:23:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:23:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:23:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:23:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:23:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 01:23:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 01:23:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-29 01:23:05,977 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-29 01:23:05,977 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-29 01:23:05,977 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-29 01:23:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-29 01:23:05,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-29 01:23:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:23:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:23:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:23:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:23:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 01:23:05,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 01:23:06,250 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:23:06,253 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:23:06,979 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:23:07,088 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:23:07,088 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 01:23:07,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:23:07 BoogieIcfgContainer [2023-11-29 01:23:07,088 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:23:07,091 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:23:07,091 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:23:07,094 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:23:07,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:23:03" (1/3) ... [2023-11-29 01:23:07,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d03691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:23:07, skipping insertion in model container [2023-11-29 01:23:07,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:23:05" (2/3) ... [2023-11-29 01:23:07,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d03691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:23:07, skipping insertion in model container [2023-11-29 01:23:07,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:23:07" (3/3) ... [2023-11-29 01:23:07,096 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2023-11-29 01:23:07,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:23:07,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:23:07,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:23:07,162 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=PETRI_NET, 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;@69cf823e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:23:07,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:23:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 96 states have internal predecessors, (125), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 01:23:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-29 01:23:07,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:07,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:07,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:07,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash -273287374, now seen corresponding path program 1 times [2023-11-29 01:23:07,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:07,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588986760] [2023-11-29 01:23:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:07,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 01:23:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 01:23:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 01:23:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 01:23:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 01:23:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 01:23:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-29 01:23:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-29 01:23:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-29 01:23:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-29 01:23:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-29 01:23:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588986760] [2023-11-29 01:23:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588986760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:07,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:23:07,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678124846] [2023-11-29 01:23:07,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:07,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:23:07,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:23:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:23:07,995 INFO L87 Difference]: Start difference. First operand has 148 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 96 states have internal predecessors, (125), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-29 01:23:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:09,232 INFO L93 Difference]: Finished difference Result 335 states and 481 transitions. [2023-11-29 01:23:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:23:09,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 98 [2023-11-29 01:23:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:09,247 INFO L225 Difference]: With dead ends: 335 [2023-11-29 01:23:09,247 INFO L226 Difference]: Without dead ends: 193 [2023-11-29 01:23:09,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:23:09,255 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 174 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:09,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 162 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:23:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-29 01:23:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2023-11-29 01:23:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 95 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-29 01:23:09,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2023-11-29 01:23:09,319 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 98 [2023-11-29 01:23:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:09,320 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2023-11-29 01:23:09,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-29 01:23:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2023-11-29 01:23:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 01:23:09,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:09,327 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:23:09,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:09,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1304949155, now seen corresponding path program 1 times [2023-11-29 01:23:09,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:09,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931517191] [2023-11-29 01:23:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 01:23:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 01:23:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 01:23:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 01:23:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 01:23:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 01:23:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-29 01:23:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-29 01:23:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 01:23:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-29 01:23:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 01:23:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 01:23:09,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:09,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931517191] [2023-11-29 01:23:09,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931517191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:23:09,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991444060] [2023-11-29 01:23:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:09,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:09,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:09,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:09,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:23:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:10,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:23:10,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-29 01:23:10,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:10,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991444060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:10,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:23:10,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-11-29 01:23:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289033334] [2023-11-29 01:23:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:10,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:23:10,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:23:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:23:10,454 INFO L87 Difference]: Start difference. First operand 146 states and 187 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-29 01:23:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:10,648 INFO L93 Difference]: Finished difference Result 283 states and 365 transitions. [2023-11-29 01:23:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:23:10,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 113 [2023-11-29 01:23:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:10,651 INFO L225 Difference]: With dead ends: 283 [2023-11-29 01:23:10,651 INFO L226 Difference]: Without dead ends: 147 [2023-11-29 01:23:10,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:23:10,654 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:10,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 340 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:23:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-29 01:23:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-11-29 01:23:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 96 states have internal predecessors, (119), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-29 01:23:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2023-11-29 01:23:10,688 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 113 [2023-11-29 01:23:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:10,688 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2023-11-29 01:23:10,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-29 01:23:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2023-11-29 01:23:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 01:23:10,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:10,692 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:10,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:23:10,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:10,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:10,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash -790784473, now seen corresponding path program 1 times [2023-11-29 01:23:10,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:10,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295129259] [2023-11-29 01:23:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:10,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 01:23:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 01:23:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 01:23:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 01:23:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 01:23:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 01:23:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-29 01:23:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-29 01:23:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 01:23:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-29 01:23:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 01:23:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-29 01:23:11,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:11,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295129259] [2023-11-29 01:23:11,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295129259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:11,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:11,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:23:11,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461679436] [2023-11-29 01:23:11,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:11,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:23:11,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:23:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:23:11,570 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-29 01:23:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:13,113 INFO L93 Difference]: Finished difference Result 287 states and 373 transitions. [2023-11-29 01:23:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:23:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 113 [2023-11-29 01:23:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:13,117 INFO L225 Difference]: With dead ends: 287 [2023-11-29 01:23:13,117 INFO L226 Difference]: Without dead ends: 198 [2023-11-29 01:23:13,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:23:13,119 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 361 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:13,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 149 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:23:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-29 01:23:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2023-11-29 01:23:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 96 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-29 01:23:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2023-11-29 01:23:13,144 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 113 [2023-11-29 01:23:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:13,144 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2023-11-29 01:23:13,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-29 01:23:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2023-11-29 01:23:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 01:23:13,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:13,147 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:13,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:23:13,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:13,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1815710381, now seen corresponding path program 1 times [2023-11-29 01:23:13,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:13,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831602183] [2023-11-29 01:23:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:13,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 01:23:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 01:23:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 01:23:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 01:23:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 01:23:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 01:23:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 01:23:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-29 01:23:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-29 01:23:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 01:23:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 01:23:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:23:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 01:23:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:13,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 01:23:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-29 01:23:14,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:14,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831602183] [2023-11-29 01:23:14,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831602183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:14,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:14,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:23:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499246850] [2023-11-29 01:23:14,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:14,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:23:14,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:14,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:23:14,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:23:14,009 INFO L87 Difference]: Start difference. First operand 147 states and 187 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-29 01:23:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:16,186 INFO L93 Difference]: Finished difference Result 301 states and 392 transitions. [2023-11-29 01:23:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:23:16,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2023-11-29 01:23:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:16,189 INFO L225 Difference]: With dead ends: 301 [2023-11-29 01:23:16,189 INFO L226 Difference]: Without dead ends: 179 [2023-11-29 01:23:16,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:23:16,191 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 307 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:16,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 207 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 01:23:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-29 01:23:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 149. [2023-11-29 01:23:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 98 states have internal predecessors, (119), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-11-29 01:23:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 190 transitions. [2023-11-29 01:23:16,214 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 190 transitions. Word has length 121 [2023-11-29 01:23:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:16,214 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 190 transitions. [2023-11-29 01:23:16,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-29 01:23:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 190 transitions. [2023-11-29 01:23:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-29 01:23:16,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:16,217 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:16,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:23:16,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:16,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:16,218 INFO L85 PathProgramCache]: Analyzing trace with hash -161022385, now seen corresponding path program 1 times [2023-11-29 01:23:16,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:16,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056725621] [2023-11-29 01:23:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:16,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:16,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:16,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017614658] [2023-11-29 01:23:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:16,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:16,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:23:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:16,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 2433 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:23:16,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:23:16,901 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:16,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:16,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056725621] [2023-11-29 01:23:16,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:16,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017614658] [2023-11-29 01:23:16,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017614658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:16,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:16,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:23:16,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895824322] [2023-11-29 01:23:16,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:16,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:23:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:23:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:23:16,904 INFO L87 Difference]: Start difference. First operand 149 states and 190 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-29 01:23:17,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:17,268 INFO L93 Difference]: Finished difference Result 241 states and 304 transitions. [2023-11-29 01:23:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:23:17,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 134 [2023-11-29 01:23:17,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:17,270 INFO L225 Difference]: With dead ends: 241 [2023-11-29 01:23:17,271 INFO L226 Difference]: Without dead ends: 149 [2023-11-29 01:23:17,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:23:17,272 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 48 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:17,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 741 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:23:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-29 01:23:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-29 01:23:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 98 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-11-29 01:23:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 189 transitions. [2023-11-29 01:23:17,291 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 189 transitions. Word has length 134 [2023-11-29 01:23:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:17,291 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 189 transitions. [2023-11-29 01:23:17,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-29 01:23:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 189 transitions. [2023-11-29 01:23:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-29 01:23:17,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:17,294 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:17,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:23:17,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:17,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:17,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:17,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1410615974, now seen corresponding path program 1 times [2023-11-29 01:23:17,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:17,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738411390] [2023-11-29 01:23:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:17,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:17,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351862132] [2023-11-29 01:23:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:17,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:17,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:17,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:23:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:18,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:23:18,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 01:23:18,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:18,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738411390] [2023-11-29 01:23:18,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351862132] [2023-11-29 01:23:18,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351862132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:18,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:18,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:23:18,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782137402] [2023-11-29 01:23:18,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:18,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:23:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:23:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:23:18,181 INFO L87 Difference]: Start difference. First operand 149 states and 189 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-29 01:23:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:18,640 INFO L93 Difference]: Finished difference Result 254 states and 322 transitions. [2023-11-29 01:23:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:23:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 150 [2023-11-29 01:23:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:18,642 INFO L225 Difference]: With dead ends: 254 [2023-11-29 01:23:18,642 INFO L226 Difference]: Without dead ends: 149 [2023-11-29 01:23:18,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:23:18,643 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 99 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:18,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 981 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:23:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-29 01:23:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-29 01:23:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 98 states have internal predecessors, (118), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-29 01:23:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2023-11-29 01:23:18,658 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 150 [2023-11-29 01:23:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:18,659 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2023-11-29 01:23:18,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-29 01:23:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2023-11-29 01:23:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 01:23:18,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:18,662 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:18,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 01:23:18,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:18,863 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:18,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1995158902, now seen corresponding path program 1 times [2023-11-29 01:23:18,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:18,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089805531] [2023-11-29 01:23:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:18,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:18,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:18,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562826801] [2023-11-29 01:23:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:18,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:18,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:18,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:18,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:23:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:19,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 2644 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:23:19,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-29 01:23:19,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:19,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:19,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089805531] [2023-11-29 01:23:19,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:19,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562826801] [2023-11-29 01:23:19,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562826801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:19,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:19,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:23:19,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79017998] [2023-11-29 01:23:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:19,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:23:19,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:23:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:23:19,621 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:21,017 INFO L93 Difference]: Finished difference Result 261 states and 330 transitions. [2023-11-29 01:23:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:23:21,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 163 [2023-11-29 01:23:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:21,020 INFO L225 Difference]: With dead ends: 261 [2023-11-29 01:23:21,020 INFO L226 Difference]: Without dead ends: 162 [2023-11-29 01:23:21,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:23:21,021 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 18 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:21,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 751 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:23:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-29 01:23:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 153. [2023-11-29 01:23:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 102 states have internal predecessors, (123), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-29 01:23:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 193 transitions. [2023-11-29 01:23:21,037 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 193 transitions. Word has length 163 [2023-11-29 01:23:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:21,037 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 193 transitions. [2023-11-29 01:23:21,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 193 transitions. [2023-11-29 01:23:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 01:23:21,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:21,040 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:21,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 01:23:21,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:21,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:21,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:21,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1807182220, now seen corresponding path program 1 times [2023-11-29 01:23:21,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:21,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156632013] [2023-11-29 01:23:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:21,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:21,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:21,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740793528] [2023-11-29 01:23:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:21,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:21,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:21,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:21,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:23:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:21,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:23:21,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-29 01:23:21,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:21,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:21,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156632013] [2023-11-29 01:23:21,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:21,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740793528] [2023-11-29 01:23:21,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740793528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:21,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:21,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:23:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340610842] [2023-11-29 01:23:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:23:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:23:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:23:21,837 INFO L87 Difference]: Start difference. First operand 153 states and 193 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:22,073 INFO L93 Difference]: Finished difference Result 254 states and 319 transitions. [2023-11-29 01:23:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:23:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 163 [2023-11-29 01:23:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:22,075 INFO L225 Difference]: With dead ends: 254 [2023-11-29 01:23:22,075 INFO L226 Difference]: Without dead ends: 157 [2023-11-29 01:23:22,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:23:22,077 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 3 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:22,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 497 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:23:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-29 01:23:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2023-11-29 01:23:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 101 states have (on average 1.2376237623762376) internal successors, (125), 104 states have internal predecessors, (125), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-29 01:23:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 195 transitions. [2023-11-29 01:23:22,092 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 195 transitions. Word has length 163 [2023-11-29 01:23:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:22,093 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 195 transitions. [2023-11-29 01:23:22,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 195 transitions. [2023-11-29 01:23:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 01:23:22,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:22,096 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:22,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:23:22,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:22,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:22,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:22,297 INFO L85 PathProgramCache]: Analyzing trace with hash 591028494, now seen corresponding path program 1 times [2023-11-29 01:23:22,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:22,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248417359] [2023-11-29 01:23:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:22,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:22,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:22,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585525741] [2023-11-29 01:23:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:22,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:22,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:22,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:23:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:22,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:23:22,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-29 01:23:22,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:23:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-29 01:23:23,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:23,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248417359] [2023-11-29 01:23:23,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:23,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585525741] [2023-11-29 01:23:23,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585525741] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:23:23,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:23:23,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-29 01:23:23,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895253281] [2023-11-29 01:23:23,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:23,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:23:23,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:23:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:23:23,185 INFO L87 Difference]: Start difference. First operand 155 states and 195 transitions. Second operand has 6 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-29 01:23:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:23,671 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2023-11-29 01:23:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:23:23,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 163 [2023-11-29 01:23:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:23,674 INFO L225 Difference]: With dead ends: 165 [2023-11-29 01:23:23,674 INFO L226 Difference]: Without dead ends: 163 [2023-11-29 01:23:23,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:23:23,675 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 6 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:23,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 835 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:23:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-29 01:23:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2023-11-29 01:23:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 109 states have internal predecessors, (129), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-29 01:23:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2023-11-29 01:23:23,692 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 163 [2023-11-29 01:23:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:23,693 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2023-11-29 01:23:23,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-29 01:23:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2023-11-29 01:23:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 01:23:23,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:23,696 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:23,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:23:23,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:23,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:23,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2135876603, now seen corresponding path program 1 times [2023-11-29 01:23:23,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:23,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453302536] [2023-11-29 01:23:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:23,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486552584] [2023-11-29 01:23:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:23,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:23,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:23,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:23,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:23:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:24,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:23:24,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-29 01:23:24,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:24,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453302536] [2023-11-29 01:23:24,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486552584] [2023-11-29 01:23:24,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486552584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:24,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:24,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:23:24,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944034687] [2023-11-29 01:23:24,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:23:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:23:24,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:23:24,586 INFO L87 Difference]: Start difference. First operand 162 states and 206 transitions. Second operand has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-29 01:23:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:24,987 INFO L93 Difference]: Finished difference Result 259 states and 328 transitions. [2023-11-29 01:23:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:23:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 163 [2023-11-29 01:23:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:24,989 INFO L225 Difference]: With dead ends: 259 [2023-11-29 01:23:24,989 INFO L226 Difference]: Without dead ends: 162 [2023-11-29 01:23:24,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:23:24,990 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 9 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:24,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 819 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:23:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-29 01:23:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-11-29 01:23:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 109 states have internal predecessors, (128), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-29 01:23:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 205 transitions. [2023-11-29 01:23:25,001 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 205 transitions. Word has length 163 [2023-11-29 01:23:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:25,001 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 205 transitions. [2023-11-29 01:23:25,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-29 01:23:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 205 transitions. [2023-11-29 01:23:25,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-29 01:23:25,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:25,003 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:25,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:23:25,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:23:25,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:25,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash 72037725, now seen corresponding path program 1 times [2023-11-29 01:23:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:25,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26431737] [2023-11-29 01:23:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:25,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:25,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386385237] [2023-11-29 01:23:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:25,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:25,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:25,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:25,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:23:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:25,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:23:25,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-29 01:23:25,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:25,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26431737] [2023-11-29 01:23:25,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386385237] [2023-11-29 01:23:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386385237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:25,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:25,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:23:25,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160276949] [2023-11-29 01:23:25,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:25,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:23:25,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:23:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:23:25,852 INFO L87 Difference]: Start difference. First operand 162 states and 205 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-29 01:23:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:26,208 INFO L93 Difference]: Finished difference Result 261 states and 329 transitions. [2023-11-29 01:23:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:23:26,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 165 [2023-11-29 01:23:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:26,210 INFO L225 Difference]: With dead ends: 261 [2023-11-29 01:23:26,211 INFO L226 Difference]: Without dead ends: 163 [2023-11-29 01:23:26,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:23:26,212 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 11 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:26,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 819 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:23:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-29 01:23:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-11-29 01:23:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 110 states have internal predecessors, (129), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-29 01:23:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 206 transitions. [2023-11-29 01:23:26,227 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 206 transitions. Word has length 165 [2023-11-29 01:23:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:26,228 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 206 transitions. [2023-11-29 01:23:26,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 7 states have internal predecessors, (77), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-29 01:23:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 206 transitions. [2023-11-29 01:23:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-29 01:23:26,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:26,230 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:26,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:23:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:23:26,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:26,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash -913893167, now seen corresponding path program 1 times [2023-11-29 01:23:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888649927] [2023-11-29 01:23:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:26,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:26,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:26,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391953105] [2023-11-29 01:23:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:26,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:26,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:26,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:26,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:23:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:27,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 2666 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:23:27,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 01:23:27,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:27,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888649927] [2023-11-29 01:23:27,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391953105] [2023-11-29 01:23:27,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391953105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:27,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:27,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:23:27,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115381006] [2023-11-29 01:23:27,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:23:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:23:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:23:27,034 INFO L87 Difference]: Start difference. First operand 163 states and 206 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:27,248 INFO L93 Difference]: Finished difference Result 272 states and 351 transitions. [2023-11-29 01:23:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:23:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 166 [2023-11-29 01:23:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:27,250 INFO L225 Difference]: With dead ends: 272 [2023-11-29 01:23:27,250 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 01:23:27,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:23:27,252 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 6 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:27,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 478 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:23:27,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 01:23:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2023-11-29 01:23:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 111 states have internal predecessors, (130), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-29 01:23:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 207 transitions. [2023-11-29 01:23:27,266 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 207 transitions. Word has length 166 [2023-11-29 01:23:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:27,266 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 207 transitions. [2023-11-29 01:23:27,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 207 transitions. [2023-11-29 01:23:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-29 01:23:27,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:27,268 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:27,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:23:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:23:27,469 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:27,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash -248244431, now seen corresponding path program 1 times [2023-11-29 01:23:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668762997] [2023-11-29 01:23:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:27,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:27,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916909416] [2023-11-29 01:23:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:27,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:27,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:27,531 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:27,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:23:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:28,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 01:23:28,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 01:23:28,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:28,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:28,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668762997] [2023-11-29 01:23:28,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916909416] [2023-11-29 01:23:28,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916909416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:28,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:28,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 01:23:28,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941535557] [2023-11-29 01:23:28,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:28,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:23:28,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:23:28,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:23:28,319 INFO L87 Difference]: Start difference. First operand 164 states and 207 transitions. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-29 01:23:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:30,040 INFO L93 Difference]: Finished difference Result 303 states and 387 transitions. [2023-11-29 01:23:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:23:30,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 166 [2023-11-29 01:23:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:30,042 INFO L225 Difference]: With dead ends: 303 [2023-11-29 01:23:30,042 INFO L226 Difference]: Without dead ends: 189 [2023-11-29 01:23:30,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:23:30,044 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 123 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:30,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1240 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 01:23:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-29 01:23:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 175. [2023-11-29 01:23:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 121 states have internal predecessors, (143), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 36 states have call predecessors, (44), 35 states have call successors, (44) [2023-11-29 01:23:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 223 transitions. [2023-11-29 01:23:30,057 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 223 transitions. Word has length 166 [2023-11-29 01:23:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:30,057 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 223 transitions. [2023-11-29 01:23:30,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-29 01:23:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 223 transitions. [2023-11-29 01:23:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-29 01:23:30,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:30,059 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:30,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:23:30,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:30,259 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:30,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1346380173, now seen corresponding path program 1 times [2023-11-29 01:23:30,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:30,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081778266] [2023-11-29 01:23:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:30,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:30,354 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:30,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856449761] [2023-11-29 01:23:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:30,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:30,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:30,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:30,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:23:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:30,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:23:30,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 01:23:31,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081778266] [2023-11-29 01:23:31,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:31,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856449761] [2023-11-29 01:23:31,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856449761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:31,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:31,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:23:31,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629228245] [2023-11-29 01:23:31,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:31,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:23:31,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:23:31,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:23:31,079 INFO L87 Difference]: Start difference. First operand 175 states and 223 transitions. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:36,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:23:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:36,476 INFO L93 Difference]: Finished difference Result 380 states and 490 transitions. [2023-11-29 01:23:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:23:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 166 [2023-11-29 01:23:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:36,478 INFO L225 Difference]: With dead ends: 380 [2023-11-29 01:23:36,478 INFO L226 Difference]: Without dead ends: 278 [2023-11-29 01:23:36,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:23:36,479 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 112 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:36,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1200 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 349 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-11-29 01:23:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-29 01:23:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 259. [2023-11-29 01:23:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 177 states have (on average 1.2259887005649717) internal successors, (217), 181 states have internal predecessors, (217), 51 states have call successors, (51), 28 states have call predecessors, (51), 30 states have return successors, (62), 50 states have call predecessors, (62), 50 states have call successors, (62) [2023-11-29 01:23:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 330 transitions. [2023-11-29 01:23:36,500 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 330 transitions. Word has length 166 [2023-11-29 01:23:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:36,501 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 330 transitions. [2023-11-29 01:23:36,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 330 transitions. [2023-11-29 01:23:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-29 01:23:36,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:36,502 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:36,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:23:36,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:23:36,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:36,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1233711089, now seen corresponding path program 1 times [2023-11-29 01:23:36,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:36,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457815754] [2023-11-29 01:23:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:36,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:36,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:36,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755004057] [2023-11-29 01:23:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:36,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:36,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:36,763 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:36,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:23:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:37,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:23:37,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-29 01:23:37,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:37,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457815754] [2023-11-29 01:23:37,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755004057] [2023-11-29 01:23:37,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755004057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:37,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:37,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:23:37,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558271146] [2023-11-29 01:23:37,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:37,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:23:37,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:37,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:23:37,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:23:37,520 INFO L87 Difference]: Start difference. First operand 259 states and 330 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:38,408 INFO L93 Difference]: Finished difference Result 288 states and 364 transitions. [2023-11-29 01:23:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:23:38,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 168 [2023-11-29 01:23:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:38,411 INFO L225 Difference]: With dead ends: 288 [2023-11-29 01:23:38,411 INFO L226 Difference]: Without dead ends: 262 [2023-11-29 01:23:38,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:23:38,412 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 99 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:38,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1029 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:23:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-29 01:23:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2023-11-29 01:23:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 178 states have (on average 1.2247191011235956) internal successors, (218), 181 states have internal predecessors, (218), 51 states have call successors, (51), 28 states have call predecessors, (51), 30 states have return successors, (62), 51 states have call predecessors, (62), 50 states have call successors, (62) [2023-11-29 01:23:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 331 transitions. [2023-11-29 01:23:38,432 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 331 transitions. Word has length 168 [2023-11-29 01:23:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:38,433 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 331 transitions. [2023-11-29 01:23:38,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 331 transitions. [2023-11-29 01:23:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-29 01:23:38,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:38,435 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:38,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:23:38,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:23:38,635 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:38,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1459563149, now seen corresponding path program 2 times [2023-11-29 01:23:38,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:38,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231399232] [2023-11-29 01:23:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:38,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:38,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:38,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938592510] [2023-11-29 01:23:38,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:23:38,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:38,699 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:38,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:23:39,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:23:39,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:23:39,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:23:39,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 01:23:39,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:23:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-29 01:23:39,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:39,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231399232] [2023-11-29 01:23:39,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:39,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938592510] [2023-11-29 01:23:39,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938592510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:23:39,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:23:39,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-29 01:23:39,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492177552] [2023-11-29 01:23:39,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:23:39,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:23:39,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:23:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:23:39,893 INFO L87 Difference]: Start difference. First operand 260 states and 331 transitions. Second operand has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-29 01:23:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:40,782 INFO L93 Difference]: Finished difference Result 371 states and 472 transitions. [2023-11-29 01:23:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:23:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 170 [2023-11-29 01:23:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:40,787 INFO L225 Difference]: With dead ends: 371 [2023-11-29 01:23:40,787 INFO L226 Difference]: Without dead ends: 261 [2023-11-29 01:23:40,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:23:40,789 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 17 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:40,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 979 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:23:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-29 01:23:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2023-11-29 01:23:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 179 states have (on average 1.223463687150838) internal successors, (219), 182 states have internal predecessors, (219), 51 states have call successors, (51), 28 states have call predecessors, (51), 30 states have return successors, (62), 51 states have call predecessors, (62), 50 states have call successors, (62) [2023-11-29 01:23:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 332 transitions. [2023-11-29 01:23:40,818 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 332 transitions. Word has length 170 [2023-11-29 01:23:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:40,819 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 332 transitions. [2023-11-29 01:23:40,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.0) internal successors, (88), 13 states have internal predecessors, (88), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-29 01:23:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 332 transitions. [2023-11-29 01:23:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-29 01:23:40,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:40,821 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:40,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:23:41,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:23:41,022 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:41,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1320657745, now seen corresponding path program 3 times [2023-11-29 01:23:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:41,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271981144] [2023-11-29 01:23:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:41,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:41,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996742568] [2023-11-29 01:23:41,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:23:41,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:41,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:41,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:23:41,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:23:41,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:23:41,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 01:23:41,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 01:23:42,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:23:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-29 01:23:42,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:42,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271981144] [2023-11-29 01:23:42,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:42,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996742568] [2023-11-29 01:23:42,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996742568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:23:42,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:23:42,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-29 01:23:42,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346702318] [2023-11-29 01:23:42,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:23:42,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:23:42,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:23:42,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:23:42,507 INFO L87 Difference]: Start difference. First operand 261 states and 332 transitions. Second operand has 16 states, 13 states have (on average 7.0) internal successors, (91), 16 states have internal predecessors, (91), 7 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-29 01:23:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:43,247 INFO L93 Difference]: Finished difference Result 373 states and 474 transitions. [2023-11-29 01:23:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:23:43,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 7.0) internal successors, (91), 16 states have internal predecessors, (91), 7 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) Word has length 171 [2023-11-29 01:23:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:43,249 INFO L225 Difference]: With dead ends: 373 [2023-11-29 01:23:43,249 INFO L226 Difference]: Without dead ends: 262 [2023-11-29 01:23:43,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:23:43,251 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 17 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:43,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1303 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:23:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-29 01:23:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2023-11-29 01:23:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 180 states have (on average 1.2222222222222223) internal successors, (220), 183 states have internal predecessors, (220), 51 states have call successors, (51), 28 states have call predecessors, (51), 30 states have return successors, (62), 51 states have call predecessors, (62), 50 states have call successors, (62) [2023-11-29 01:23:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 333 transitions. [2023-11-29 01:23:43,279 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 333 transitions. Word has length 171 [2023-11-29 01:23:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:43,280 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 333 transitions. [2023-11-29 01:23:43,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 7.0) internal successors, (91), 16 states have internal predecessors, (91), 7 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-29 01:23:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 333 transitions. [2023-11-29 01:23:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-29 01:23:43,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:43,282 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:43,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 01:23:43,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:23:43,483 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:43,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1608159539, now seen corresponding path program 4 times [2023-11-29 01:23:43,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:43,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526831835] [2023-11-29 01:23:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:43,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:43,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551232404] [2023-11-29 01:23:43,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:23:43,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:43,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:43,545 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:43,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:23:44,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:23:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:23:44,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 2721 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:23:44,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-29 01:23:44,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:23:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 01:23:44,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526831835] [2023-11-29 01:23:44,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:44,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551232404] [2023-11-29 01:23:44,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551232404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:23:44,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:23:44,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 01:23:44,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170481722] [2023-11-29 01:23:44,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:23:44,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:23:44,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:44,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:23:44,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:23:44,309 INFO L87 Difference]: Start difference. First operand 262 states and 333 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-29 01:23:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:44,898 INFO L93 Difference]: Finished difference Result 484 states and 639 transitions. [2023-11-29 01:23:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:23:44,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 172 [2023-11-29 01:23:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:44,902 INFO L225 Difference]: With dead ends: 484 [2023-11-29 01:23:44,902 INFO L226 Difference]: Without dead ends: 286 [2023-11-29 01:23:44,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:23:44,903 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 21 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:44,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 803 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:23:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-29 01:23:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 274. [2023-11-29 01:23:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 192 states have (on average 1.2395833333333333) internal successors, (238), 195 states have internal predecessors, (238), 51 states have call successors, (51), 28 states have call predecessors, (51), 30 states have return successors, (62), 51 states have call predecessors, (62), 50 states have call successors, (62) [2023-11-29 01:23:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 351 transitions. [2023-11-29 01:23:44,924 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 351 transitions. Word has length 172 [2023-11-29 01:23:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:44,924 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 351 transitions. [2023-11-29 01:23:44,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-29 01:23:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 351 transitions. [2023-11-29 01:23:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-29 01:23:44,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:44,926 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:44,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:23:45,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:23:45,127 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:45,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash -66043640, now seen corresponding path program 1 times [2023-11-29 01:23:45,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:45,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091026692] [2023-11-29 01:23:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:45,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:45,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:45,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357742113] [2023-11-29 01:23:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:45,185 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:45,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:23:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:45,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:23:45,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-29 01:23:45,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091026692] [2023-11-29 01:23:45,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357742113] [2023-11-29 01:23:45,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357742113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:45,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:45,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:23:45,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961881068] [2023-11-29 01:23:45,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:45,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:23:45,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:23:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:23:45,733 INFO L87 Difference]: Start difference. First operand 274 states and 351 transitions. Second operand has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 8 states have internal predecessors, (83), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-29 01:23:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:46,272 INFO L93 Difference]: Finished difference Result 409 states and 525 transitions. [2023-11-29 01:23:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:23:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 8 states have internal predecessors, (83), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) Word has length 182 [2023-11-29 01:23:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:46,275 INFO L225 Difference]: With dead ends: 409 [2023-11-29 01:23:46,275 INFO L226 Difference]: Without dead ends: 272 [2023-11-29 01:23:46,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:23:46,276 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 42 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:46,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1031 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:23:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-29 01:23:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2023-11-29 01:23:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 191 states have (on average 1.2303664921465969) internal successors, (235), 193 states have internal predecessors, (235), 51 states have call successors, (51), 28 states have call predecessors, (51), 29 states have return successors, (61), 51 states have call predecessors, (61), 50 states have call successors, (61) [2023-11-29 01:23:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 347 transitions. [2023-11-29 01:23:46,296 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 347 transitions. Word has length 182 [2023-11-29 01:23:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:46,296 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 347 transitions. [2023-11-29 01:23:46,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 8 states have internal predecessors, (83), 6 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-29 01:23:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 347 transitions. [2023-11-29 01:23:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-29 01:23:46,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:46,298 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:46,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:23:46,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:46,499 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:46,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:46,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1314679443, now seen corresponding path program 5 times [2023-11-29 01:23:46,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:46,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183278977] [2023-11-29 01:23:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:46,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:46,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:46,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612031205] [2023-11-29 01:23:46,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:23:46,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:46,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:46,578 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:46,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:23:47,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 01:23:47,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:23:47,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:23:47,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-11-29 01:23:47,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183278977] [2023-11-29 01:23:47,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612031205] [2023-11-29 01:23:47,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612031205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:47,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:47,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:23:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727266721] [2023-11-29 01:23:47,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:47,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:23:47,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:47,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:23:47,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:23:47,228 INFO L87 Difference]: Start difference. First operand 272 states and 347 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:48,627 INFO L93 Difference]: Finished difference Result 459 states and 580 transitions. [2023-11-29 01:23:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:23:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 184 [2023-11-29 01:23:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:48,630 INFO L225 Difference]: With dead ends: 459 [2023-11-29 01:23:48,630 INFO L226 Difference]: Without dead ends: 272 [2023-11-29 01:23:48,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:23:48,631 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 10 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:48,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 890 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:23:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-29 01:23:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2023-11-29 01:23:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 191 states have (on average 1.225130890052356) internal successors, (234), 193 states have internal predecessors, (234), 51 states have call successors, (51), 28 states have call predecessors, (51), 29 states have return successors, (61), 51 states have call predecessors, (61), 50 states have call successors, (61) [2023-11-29 01:23:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 346 transitions. [2023-11-29 01:23:48,661 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 346 transitions. Word has length 184 [2023-11-29 01:23:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:48,661 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 346 transitions. [2023-11-29 01:23:48,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 346 transitions. [2023-11-29 01:23:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-29 01:23:48,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:48,664 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:48,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 01:23:48,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:48,864 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:48,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash -304295471, now seen corresponding path program 1 times [2023-11-29 01:23:48,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:48,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048044763] [2023-11-29 01:23:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:48,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:48,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:48,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846946697] [2023-11-29 01:23:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:48,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:48,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:48,922 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:48,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:23:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:49,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 2760 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:23:49,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 57 proven. 22 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-29 01:23:49,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:23:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-11-29 01:23:49,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:49,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048044763] [2023-11-29 01:23:49,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:49,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846946697] [2023-11-29 01:23:49,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846946697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:23:49,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:23:49,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2023-11-29 01:23:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683344395] [2023-11-29 01:23:49,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:23:49,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 01:23:49,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:49,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 01:23:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:23:49,941 INFO L87 Difference]: Start difference. First operand 272 states and 346 transitions. Second operand has 22 states, 20 states have (on average 5.2) internal successors, (104), 22 states have internal predecessors, (104), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2023-11-29 01:23:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:51,740 INFO L93 Difference]: Finished difference Result 407 states and 535 transitions. [2023-11-29 01:23:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:23:51,741 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 5.2) internal successors, (104), 22 states have internal predecessors, (104), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 184 [2023-11-29 01:23:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:51,742 INFO L225 Difference]: With dead ends: 407 [2023-11-29 01:23:51,742 INFO L226 Difference]: Without dead ends: 291 [2023-11-29 01:23:51,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 345 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:23:51,744 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 31 mSDsluCounter, 2219 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:51,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2383 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 01:23:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-29 01:23:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 273. [2023-11-29 01:23:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 192 states have (on average 1.2239583333333333) internal successors, (235), 194 states have internal predecessors, (235), 51 states have call successors, (51), 28 states have call predecessors, (51), 29 states have return successors, (61), 51 states have call predecessors, (61), 50 states have call successors, (61) [2023-11-29 01:23:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 347 transitions. [2023-11-29 01:23:51,765 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 347 transitions. Word has length 184 [2023-11-29 01:23:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:51,765 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 347 transitions. [2023-11-29 01:23:51,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 5.2) internal successors, (104), 22 states have internal predecessors, (104), 6 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2023-11-29 01:23:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 347 transitions. [2023-11-29 01:23:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-29 01:23:51,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:51,767 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:51,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:23:51,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:51,968 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1096775989, now seen corresponding path program 2 times [2023-11-29 01:23:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:51,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838194277] [2023-11-29 01:23:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:51,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:52,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:52,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532760827] [2023-11-29 01:23:52,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:23:52,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:52,027 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:52,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:23:52,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:23:52,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:23:52,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 01:23:52,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-11-29 01:23:52,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:52,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838194277] [2023-11-29 01:23:52,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532760827] [2023-11-29 01:23:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532760827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:52,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:52,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 01:23:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454095673] [2023-11-29 01:23:52,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:23:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:23:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:23:52,834 INFO L87 Difference]: Start difference. First operand 273 states and 347 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:53,133 INFO L93 Difference]: Finished difference Result 404 states and 511 transitions. [2023-11-29 01:23:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:23:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2023-11-29 01:23:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:53,138 INFO L225 Difference]: With dead ends: 404 [2023-11-29 01:23:53,138 INFO L226 Difference]: Without dead ends: 285 [2023-11-29 01:23:53,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:23:53,139 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 13 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:53,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 968 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:23:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-29 01:23:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2023-11-29 01:23:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 200 states have (on average 1.225) internal successors, (245), 202 states have internal predecessors, (245), 51 states have call successors, (51), 28 states have call predecessors, (51), 29 states have return successors, (61), 51 states have call predecessors, (61), 50 states have call successors, (61) [2023-11-29 01:23:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 357 transitions. [2023-11-29 01:23:53,158 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 357 transitions. Word has length 185 [2023-11-29 01:23:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:53,159 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 357 transitions. [2023-11-29 01:23:53,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 357 transitions. [2023-11-29 01:23:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-29 01:23:53,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:53,161 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:53,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:23:53,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:53,361 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:53,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:53,362 INFO L85 PathProgramCache]: Analyzing trace with hash 345842803, now seen corresponding path program 1 times [2023-11-29 01:23:53,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:53,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791516312] [2023-11-29 01:23:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:53,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:53,437 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:53,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015624646] [2023-11-29 01:23:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:53,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:53,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:53,439 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:53,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:23:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:54,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 2774 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:23:54,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-29 01:23:54,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:54,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:54,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791516312] [2023-11-29 01:23:54,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:54,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015624646] [2023-11-29 01:23:54,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015624646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:54,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:54,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:23:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769737362] [2023-11-29 01:23:54,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:54,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:23:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:23:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:23:54,041 INFO L87 Difference]: Start difference. First operand 281 states and 357 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:54,250 INFO L93 Difference]: Finished difference Result 526 states and 676 transitions. [2023-11-29 01:23:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:23:54,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2023-11-29 01:23:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:54,252 INFO L225 Difference]: With dead ends: 526 [2023-11-29 01:23:54,252 INFO L226 Difference]: Without dead ends: 286 [2023-11-29 01:23:54,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:23:54,254 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 7 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:54,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 499 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:23:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-29 01:23:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 283. [2023-11-29 01:23:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 202 states have (on average 1.2178217821782178) internal successors, (246), 204 states have internal predecessors, (246), 51 states have call successors, (51), 28 states have call predecessors, (51), 29 states have return successors, (61), 51 states have call predecessors, (61), 50 states have call successors, (61) [2023-11-29 01:23:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 358 transitions. [2023-11-29 01:23:54,273 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 358 transitions. Word has length 185 [2023-11-29 01:23:54,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:54,273 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 358 transitions. [2023-11-29 01:23:54,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 358 transitions. [2023-11-29 01:23:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 01:23:54,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:54,275 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:54,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:23:54,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:54,476 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:54,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash -507217075, now seen corresponding path program 1 times [2023-11-29 01:23:54,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:54,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708923406] [2023-11-29 01:23:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:54,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:54,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836748257] [2023-11-29 01:23:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:54,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:54,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:54,543 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:54,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:23:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:55,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:23:55,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-11-29 01:23:55,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:23:55,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708923406] [2023-11-29 01:23:55,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:23:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836748257] [2023-11-29 01:23:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836748257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:23:55,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:23:55,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:23:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744685566] [2023-11-29 01:23:55,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:23:55,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:23:55,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:23:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:23:55,135 INFO L87 Difference]: Start difference. First operand 283 states and 358 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:56,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:23:56,257 INFO L93 Difference]: Finished difference Result 530 states and 677 transitions. [2023-11-29 01:23:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:23:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 187 [2023-11-29 01:23:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:23:56,259 INFO L225 Difference]: With dead ends: 530 [2023-11-29 01:23:56,259 INFO L226 Difference]: Without dead ends: 288 [2023-11-29 01:23:56,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:23:56,261 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 10 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:23:56,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 625 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:23:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-29 01:23:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2023-11-29 01:23:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 203 states have (on average 1.2118226600985222) internal successors, (246), 205 states have internal predecessors, (246), 51 states have call successors, (51), 28 states have call predecessors, (51), 29 states have return successors, (61), 51 states have call predecessors, (61), 50 states have call successors, (61) [2023-11-29 01:23:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2023-11-29 01:23:56,291 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 187 [2023-11-29 01:23:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:23:56,292 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2023-11-29 01:23:56,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:23:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2023-11-29 01:23:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 01:23:56,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:23:56,294 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:23:56,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 01:23:56,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:23:56,495 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:23:56,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:23:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1814359473, now seen corresponding path program 1 times [2023-11-29 01:23:56,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:23:56,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373090643] [2023-11-29 01:23:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:56,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:23:56,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:23:56,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886654406] [2023-11-29 01:23:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:23:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:56,575 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:56,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:23:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:57,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 01:23:57,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:57,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 15 [2023-11-29 01:24:01,437 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 25 treesize of output 13 [2023-11-29 01:24:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-29 01:24:26,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:24:26,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:24:26,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373090643] [2023-11-29 01:24:26,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:24:26,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886654406] [2023-11-29 01:24:26,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886654406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:24:26,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:24:26,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-29 01:24:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876638446] [2023-11-29 01:24:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:24:26,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:24:26,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:24:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:24:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=188, Unknown=7, NotChecked=0, Total=240 [2023-11-29 01:24:26,065 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand has 16 states, 14 states have (on average 6.571428571428571) internal successors, (92), 15 states have internal predecessors, (92), 9 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2023-11-29 01:25:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:25:35,834 INFO L93 Difference]: Finished difference Result 650 states and 818 transitions. [2023-11-29 01:25:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:25:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 6.571428571428571) internal successors, (92), 15 states have internal predecessors, (92), 9 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 187 [2023-11-29 01:25:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:25:35,838 INFO L225 Difference]: With dead ends: 650 [2023-11-29 01:25:35,838 INFO L226 Difference]: Without dead ends: 523 [2023-11-29 01:25:35,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 94.9s TimeCoverageRelationStatistics Valid=141, Invalid=591, Unknown=24, NotChecked=0, Total=756 [2023-11-29 01:25:35,840 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 197 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:25:35,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1293 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 01:25:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-11-29 01:25:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 518. [2023-11-29 01:25:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 374 states have (on average 1.2165775401069518) internal successors, (455), 378 states have internal predecessors, (455), 90 states have call successors, (90), 54 states have call predecessors, (90), 53 states have return successors, (111), 86 states have call predecessors, (111), 89 states have call successors, (111) [2023-11-29 01:25:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 656 transitions. [2023-11-29 01:25:35,896 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 656 transitions. Word has length 187 [2023-11-29 01:25:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:25:35,897 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 656 transitions. [2023-11-29 01:25:35,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 6.571428571428571) internal successors, (92), 15 states have internal predecessors, (92), 9 states have call successors, (24), 4 states have call predecessors, (24), 6 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2023-11-29 01:25:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 656 transitions. [2023-11-29 01:25:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 01:25:35,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:25:35,899 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:25:35,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:25:36,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:25:36,100 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:25:36,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:25:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2046625971, now seen corresponding path program 1 times [2023-11-29 01:25:36,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:25:36,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987571103] [2023-11-29 01:25:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:36,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:25:36,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:25:36,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509175990] [2023-11-29 01:25:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:36,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:25:36,160 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:25:36,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:25:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:25:36,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 2789 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:25:36,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:25:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-29 01:25:36,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:25:36,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:25:36,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987571103] [2023-11-29 01:25:36,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:25:36,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509175990] [2023-11-29 01:25:36,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509175990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:25:36,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:25:36,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:25:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998876151] [2023-11-29 01:25:36,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:25:36,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:25:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:25:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:25:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:25:36,689 INFO L87 Difference]: Start difference. First operand 518 states and 656 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:25:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:25:37,020 INFO L93 Difference]: Finished difference Result 728 states and 917 transitions. [2023-11-29 01:25:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:25:37,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 187 [2023-11-29 01:25:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:25:37,023 INFO L225 Difference]: With dead ends: 728 [2023-11-29 01:25:37,023 INFO L226 Difference]: Without dead ends: 506 [2023-11-29 01:25:37,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:25:37,024 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 2 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:25:37,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 493 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:25:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2023-11-29 01:25:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 496. [2023-11-29 01:25:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 353 states have (on average 1.206798866855524) internal successors, (426), 357 states have internal predecessors, (426), 90 states have call successors, (90), 54 states have call predecessors, (90), 52 states have return successors, (108), 85 states have call predecessors, (108), 89 states have call successors, (108) [2023-11-29 01:25:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 624 transitions. [2023-11-29 01:25:37,064 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 624 transitions. Word has length 187 [2023-11-29 01:25:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:25:37,065 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 624 transitions. [2023-11-29 01:25:37,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 01:25:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 624 transitions. [2023-11-29 01:25:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-29 01:25:37,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:25:37,067 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:25:37,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:25:37,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 01:25:37,267 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:25:37,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:25:37,268 INFO L85 PathProgramCache]: Analyzing trace with hash -757692159, now seen corresponding path program 1 times [2023-11-29 01:25:37,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:25:37,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010355689] [2023-11-29 01:25:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:37,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:25:37,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:25:37,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372200319] [2023-11-29 01:25:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:37,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:25:37,338 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:25:37,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:25:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:25:38,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 2818 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 01:25:38,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:25:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 89 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 01:25:38,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:25:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-29 01:25:38,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:25:38,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010355689] [2023-11-29 01:25:38,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:25:38,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372200319] [2023-11-29 01:25:38,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372200319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:25:38,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:25:38,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 01:25:38,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415138453] [2023-11-29 01:25:38,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:25:38,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:25:38,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:25:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:25:38,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:25:38,852 INFO L87 Difference]: Start difference. First operand 496 states and 624 transitions. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-29 01:25:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:25:40,225 INFO L93 Difference]: Finished difference Result 1000 states and 1344 transitions. [2023-11-29 01:25:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:25:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 192 [2023-11-29 01:25:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:25:40,228 INFO L225 Difference]: With dead ends: 1000 [2023-11-29 01:25:40,228 INFO L226 Difference]: Without dead ends: 616 [2023-11-29 01:25:40,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:25:40,229 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 71 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:25:40,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1468 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:25:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-11-29 01:25:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 544. [2023-11-29 01:25:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 401 states have (on average 1.2418952618453865) internal successors, (498), 405 states have internal predecessors, (498), 90 states have call successors, (90), 54 states have call predecessors, (90), 52 states have return successors, (108), 85 states have call predecessors, (108), 89 states have call successors, (108) [2023-11-29 01:25:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 696 transitions. [2023-11-29 01:25:40,282 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 696 transitions. Word has length 192 [2023-11-29 01:25:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:25:40,282 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 696 transitions. [2023-11-29 01:25:40,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-29 01:25:40,283 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 696 transitions. [2023-11-29 01:25:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-29 01:25:40,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:25:40,285 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:25:40,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 01:25:40,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:25:40,486 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:25:40,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:25:40,486 INFO L85 PathProgramCache]: Analyzing trace with hash -940863709, now seen corresponding path program 1 times [2023-11-29 01:25:40,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:25:40,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643052178] [2023-11-29 01:25:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:40,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:25:40,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:25:40,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388256679] [2023-11-29 01:25:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:40,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:40,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:25:40,559 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:25:40,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:25:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:25:41,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 3255 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 01:25:41,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:25:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 126 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-29 01:25:41,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:25:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-29 01:25:41,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:25:41,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643052178] [2023-11-29 01:25:41,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:25:41,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388256679] [2023-11-29 01:25:41,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388256679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:25:41,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:25:41,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-29 01:25:41,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252641377] [2023-11-29 01:25:41,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:25:41,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:25:41,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:25:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:25:41,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:25:41,756 INFO L87 Difference]: Start difference. First operand 544 states and 696 transitions. Second operand has 19 states, 17 states have (on average 8.0) internal successors, (136), 19 states have internal predecessors, (136), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-29 01:25:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:25:42,975 INFO L93 Difference]: Finished difference Result 674 states and 868 transitions. [2023-11-29 01:25:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:25:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 8.0) internal successors, (136), 19 states have internal predecessors, (136), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 257 [2023-11-29 01:25:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:25:42,978 INFO L225 Difference]: With dead ends: 674 [2023-11-29 01:25:42,978 INFO L226 Difference]: Without dead ends: 545 [2023-11-29 01:25:42,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 494 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:25:42,979 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 11 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:25:42,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2104 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:25:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-11-29 01:25:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2023-11-29 01:25:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 402 states have (on average 1.2412935323383085) internal successors, (499), 406 states have internal predecessors, (499), 90 states have call successors, (90), 54 states have call predecessors, (90), 52 states have return successors, (108), 85 states have call predecessors, (108), 89 states have call successors, (108) [2023-11-29 01:25:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 697 transitions. [2023-11-29 01:25:43,048 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 697 transitions. Word has length 257 [2023-11-29 01:25:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:25:43,048 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 697 transitions. [2023-11-29 01:25:43,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 8.0) internal successors, (136), 19 states have internal predecessors, (136), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-29 01:25:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 697 transitions. [2023-11-29 01:25:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-29 01:25:43,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:25:43,051 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:25:43,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-29 01:25:43,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:25:43,251 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:25:43,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:25:43,251 INFO L85 PathProgramCache]: Analyzing trace with hash 939050751, now seen corresponding path program 2 times [2023-11-29 01:25:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:25:43,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3432400] [2023-11-29 01:25:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:43,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:25:43,336 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:25:43,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615985422] [2023-11-29 01:25:43,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:25:43,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:43,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:25:43,338 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:25:43,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:25:44,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:25:44,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:25:44,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 3293 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:25:44,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:25:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 137 proven. 15 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-29 01:25:44,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:25:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-11-29 01:25:44,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:25:44,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3432400] [2023-11-29 01:25:44,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:25:44,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615985422] [2023-11-29 01:25:44,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615985422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:25:44,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:25:44,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-29 01:25:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195272775] [2023-11-29 01:25:44,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:25:44,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:25:44,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:25:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:25:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:25:44,903 INFO L87 Difference]: Start difference. First operand 545 states and 697 transitions. Second operand has 21 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 21 states have internal predecessors, (138), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-29 01:25:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:25:45,934 INFO L93 Difference]: Finished difference Result 676 states and 870 transitions. [2023-11-29 01:25:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:25:45,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 21 states have internal predecessors, (138), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 259 [2023-11-29 01:25:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:25:45,936 INFO L225 Difference]: With dead ends: 676 [2023-11-29 01:25:45,936 INFO L226 Difference]: Without dead ends: 546 [2023-11-29 01:25:45,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:25:45,937 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 10 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:25:45,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1942 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:25:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-11-29 01:25:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2023-11-29 01:25:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 403 states have (on average 1.2406947890818858) internal successors, (500), 407 states have internal predecessors, (500), 90 states have call successors, (90), 54 states have call predecessors, (90), 52 states have return successors, (108), 85 states have call predecessors, (108), 89 states have call successors, (108) [2023-11-29 01:25:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 698 transitions. [2023-11-29 01:25:45,995 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 698 transitions. Word has length 259 [2023-11-29 01:25:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:25:45,995 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 698 transitions. [2023-11-29 01:25:45,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 21 states have internal predecessors, (138), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-29 01:25:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 698 transitions. [2023-11-29 01:25:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-29 01:25:45,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:25:45,998 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:25:46,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 01:25:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:25:46,199 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:25:46,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:25:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash 31255331, now seen corresponding path program 3 times [2023-11-29 01:25:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:25:46,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823780438] [2023-11-29 01:25:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:25:46,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:25:46,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901121963] [2023-11-29 01:25:46,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:25:46,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:25:46,300 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:25:46,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:25:47,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 01:25:47,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:25:47,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:25:47,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:25:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 94 proven. 21 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2023-11-29 01:25:47,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:25:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2023-11-29 01:25:48,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:25:48,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823780438] [2023-11-29 01:25:48,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:25:48,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901121963] [2023-11-29 01:25:48,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901121963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:25:48,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:25:48,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-29 01:25:48,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209989592] [2023-11-29 01:25:48,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:25:48,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:25:48,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:25:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:25:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:25:48,394 INFO L87 Difference]: Start difference. First operand 546 states and 698 transitions. Second operand has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 23 states have internal predecessors, (120), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2023-11-29 01:25:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:25:49,696 INFO L93 Difference]: Finished difference Result 678 states and 872 transitions. [2023-11-29 01:25:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:25:49,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 23 states have internal predecessors, (120), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 261 [2023-11-29 01:25:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:25:49,699 INFO L225 Difference]: With dead ends: 678 [2023-11-29 01:25:49,699 INFO L226 Difference]: Without dead ends: 547 [2023-11-29 01:25:49,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:25:49,700 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 16 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:25:49,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1942 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 01:25:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-29 01:25:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2023-11-29 01:25:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 404 states have (on average 1.24009900990099) internal successors, (501), 408 states have internal predecessors, (501), 90 states have call successors, (90), 54 states have call predecessors, (90), 52 states have return successors, (108), 85 states have call predecessors, (108), 89 states have call successors, (108) [2023-11-29 01:25:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 699 transitions. [2023-11-29 01:25:49,748 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 699 transitions. Word has length 261 [2023-11-29 01:25:49,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:25:49,748 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 699 transitions. [2023-11-29 01:25:49,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 23 states have internal predecessors, (120), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2023-11-29 01:25:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 699 transitions. [2023-11-29 01:25:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-29 01:25:49,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:25:49,751 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:25:49,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:25:49,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:49,952 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:25:49,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:25:49,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1011774465, now seen corresponding path program 4 times [2023-11-29 01:25:49,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:25:49,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772489443] [2023-11-29 01:25:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:25:50,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:25:50,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752868825] [2023-11-29 01:25:50,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:25:50,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:25:50,077 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:25:50,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:25:50,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:25:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:25:50,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 3369 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 01:25:50,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:25:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 165 proven. 28 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2023-11-29 01:25:50,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:25:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-29 01:25:51,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:25:51,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772489443] [2023-11-29 01:25:51,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:25:51,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752868825] [2023-11-29 01:25:51,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752868825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:25:51,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:25:51,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-29 01:25:51,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937670379] [2023-11-29 01:25:51,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:25:51,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:25:51,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:25:51,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:25:51,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:25:51,433 INFO L87 Difference]: Start difference. First operand 547 states and 699 transitions. Second operand has 25 states, 23 states have (on average 6.173913043478261) internal successors, (142), 25 states have internal predecessors, (142), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-29 01:25:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:25:53,008 INFO L93 Difference]: Finished difference Result 680 states and 874 transitions. [2023-11-29 01:25:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:25:53,009 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 6.173913043478261) internal successors, (142), 25 states have internal predecessors, (142), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 263 [2023-11-29 01:25:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:25:53,011 INFO L225 Difference]: With dead ends: 680 [2023-11-29 01:25:53,011 INFO L226 Difference]: Without dead ends: 548 [2023-11-29 01:25:53,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 500 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-11-29 01:25:53,012 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 16 mSDsluCounter, 1938 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:25:53,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2103 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 01:25:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-29 01:25:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2023-11-29 01:25:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 405 states have (on average 1.2395061728395063) internal successors, (502), 409 states have internal predecessors, (502), 90 states have call successors, (90), 54 states have call predecessors, (90), 52 states have return successors, (108), 85 states have call predecessors, (108), 89 states have call successors, (108) [2023-11-29 01:25:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 700 transitions. [2023-11-29 01:25:53,062 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 700 transitions. Word has length 263 [2023-11-29 01:25:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:25:53,063 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 700 transitions. [2023-11-29 01:25:53,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 6.173913043478261) internal successors, (142), 25 states have internal predecessors, (142), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2023-11-29 01:25:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 700 transitions. [2023-11-29 01:25:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-29 01:25:53,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:25:53,066 INFO L195 NwaCegarLoop]: trace histogram [16, 13, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:25:53,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 01:25:53,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:53,267 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:25:53,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:25:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1885919453, now seen corresponding path program 5 times [2023-11-29 01:25:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:25:53,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750823428] [2023-11-29 01:25:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:25:53,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:25:53,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:25:53,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184418822] [2023-11-29 01:25:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:25:53,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:25:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:25:53,371 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:25:53,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a9d430a-f481-4314-8588-9d695401ca33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process