./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.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_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/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_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/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_a865013c-abf4-4961-b4ce-803af3f92c7f/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 c76aa584f17d1e33f139a1a167c9edf580611a597c58d41f9a3cf9cc11662c3e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:11:23,988 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:11:24,053 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-29 04:11:24,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:11:24,058 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:11:24,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:11:24,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:11:24,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:11:24,085 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:11:24,086 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:11:24,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:11:24,087 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:11:24,088 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:11:24,088 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:11:24,089 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:11:24,089 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:11:24,090 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:11:24,090 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:11:24,091 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:11:24,091 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:11:24,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:11:24,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:11:24,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:11:24,094 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:11:24,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:11:24,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:11:24,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:11:24,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:11:24,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:11:24,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:11:24,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:11:24,097 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:11:24,097 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:11:24,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:11:24,098 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:11:24,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:11:24,098 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:11:24,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:11:24,099 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:11:24,099 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_a865013c-abf4-4961-b4ce-803af3f92c7f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c76aa584f17d1e33f139a1a167c9edf580611a597c58d41f9a3cf9cc11662c3e [2023-11-29 04:11:24,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:11:24,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:11:24,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:11:24,357 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:11:24,357 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:11:24,358 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i [2023-11-29 04:11:27,226 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:11:27,603 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:11:27,604 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i [2023-11-29 04:11:27,633 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/data/5b2c6c2c4/a53a176847544acfb04e0746859a6c0b/FLAG76062a2ab [2023-11-29 04:11:27,647 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/data/5b2c6c2c4/a53a176847544acfb04e0746859a6c0b [2023-11-29 04:11:27,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:11:27,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:11:27,652 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:11:27,652 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:11:27,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:11:27,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:11:27" (1/1) ... [2023-11-29 04:11:27,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7da184fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:27, skipping insertion in model container [2023-11-29 04:11:27,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:11:27" (1/1) ... [2023-11-29 04:11:27,733 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:11:27,955 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_a865013c-abf4-4961-b4ce-803af3f92c7f/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4501,4514] [2023-11-29 04:11:27,962 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_a865013c-abf4-4961-b4ce-803af3f92c7f/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4561,4574] [2023-11-29 04:11:28,953 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:28,954 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:28,954 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:28,956 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:28,957 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:28,974 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:28,974 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:28,976 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:28,977 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,445 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 04:11:29,446 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 04:11:29,447 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 04:11:29,448 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 04:11:29,449 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 04:11:29,450 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 04:11:29,451 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 04:11:29,451 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 04:11:29,452 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 04:11:29,452 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 04:11:29,649 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,650 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:11:29,752 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:11:29,769 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_a865013c-abf4-4961-b4ce-803af3f92c7f/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4501,4514] [2023-11-29 04:11:29,770 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_a865013c-abf4-4961-b4ce-803af3f92c7f/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness_negated.i[4561,4574] [2023-11-29 04:11:29,875 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,876 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,876 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,877 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,878 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,887 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,887 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,889 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,890 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,937 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 04:11:29,938 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 04:11:29,940 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 04:11:29,941 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 04:11:29,942 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 04:11:29,943 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 04:11:29,944 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 04:11:29,944 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 04:11:29,945 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 04:11:29,946 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 04:11:29,985 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,986 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 04:11:29,995 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7671-7682] [2023-11-29 04:11:30,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:11:30,288 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,288 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,289 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,289 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,289 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,289 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,289 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,289 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,290 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,290 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,290 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,290 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,290 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,290 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,291 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:30,299 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:11:30,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30 WrapperNode [2023-11-29 04:11:30,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:11:30,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:11:30,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:11:30,302 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:11:30,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,393 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,464 INFO L138 Inliner]: procedures = 688, calls = 1515, calls flagged for inlining = 54, calls inlined = 9, statements flattened = 619 [2023-11-29 04:11:30,465 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:11:30,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:11:30,466 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:11:30,466 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:11:30,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,489 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,568 INFO L175 MemorySlicer]: Split 295 memory accesses to 6 slices as follows [2, 236, 45, 6, 3, 3]. 80 percent of accesses are in the largest equivalence class. The 258 initializations are split as follows [2, 236, 11, 5, 1, 3]. The 6 writes are split as follows [0, 0, 5, 0, 1, 0]. [2023-11-29 04:11:30,568 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,569 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,625 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:11:30,639 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:11:30,639 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:11:30,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:11:30,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (1/1) ... [2023-11-29 04:11:30,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:11:30,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:30,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:11:30,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:11:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-29 04:11:30,731 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-29 04:11:30,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:11:30,731 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-29 04:11:30,731 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-29 04:11:30,731 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-29 04:11:30,732 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-29 04:11:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-29 04:11:30,732 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-29 04:11:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:11:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:11:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:11:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 04:11:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 04:11:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 04:11:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-29 04:11:30,733 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-29 04:11:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 04:11:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 04:11:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:11:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:11:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 04:11:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 04:11:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 04:11:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 04:11:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-29 04:11:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-29 04:11:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:11:30,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:11:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2023-11-29 04:11:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2023-11-29 04:11:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-29 04:11:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-29 04:11:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-29 04:11:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-29 04:11:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-29 04:11:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-29 04:11:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-29 04:11:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-29 04:11:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-29 04:11:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-29 04:11:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 04:11:30,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 04:11:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:11:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 04:11:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 04:11:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 04:11:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 04:11:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-29 04:11:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-29 04:11:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 04:11:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 04:11:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 04:11:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-29 04:11:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-29 04:11:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-29 04:11:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-29 04:11:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-29 04:11:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-29 04:11:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-29 04:11:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:11:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:11:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:11:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:11:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 04:11:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 04:11:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-29 04:11:30,741 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-29 04:11:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-29 04:11:30,741 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-29 04:11:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-29 04:11:30,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-29 04:11:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:11:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:11:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:11:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:11:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 04:11:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 04:11:31,028 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:11:31,031 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:11:31,808 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:11:31,963 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:11:31,963 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 04:11:31,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:11:31 BoogieIcfgContainer [2023-11-29 04:11:31,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:11:31,967 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:11:31,967 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:11:31,970 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:11:31,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:11:27" (1/3) ... [2023-11-29 04:11:31,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b400b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:11:31, skipping insertion in model container [2023-11-29 04:11:31,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:30" (2/3) ... [2023-11-29 04:11:31,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b400b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:11:31, skipping insertion in model container [2023-11-29 04:11:31,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:11:31" (3/3) ... [2023-11-29 04:11:31,973 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness_negated.i [2023-11-29 04:11:31,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:11:31,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:11:32,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:11:32,057 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;@6ec71bc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:11:32,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:11:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 102 states have (on average 1.2941176470588236) internal successors, (132), 103 states have internal predecessors, (132), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-29 04:11:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 04:11:32,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:32,082 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:32,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:32,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:32,088 INFO L85 PathProgramCache]: Analyzing trace with hash -864177994, now seen corresponding path program 1 times [2023-11-29 04:11:32,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:32,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330863467] [2023-11-29 04:11:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:32,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 04:11:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 04:11:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:11:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 04:11:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 04:11:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:11:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 04:11:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-29 04:11:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 04:11:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 04:11:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 04:11:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-29 04:11:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 04:11:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-29 04:11:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-11-29 04:11:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-29 04:11:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 04:11:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:32,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330863467] [2023-11-29 04:11:32,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330863467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:32,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:32,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:11:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981851825] [2023-11-29 04:11:32,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:33,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:33,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:33,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:33,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:11:33,038 INFO L87 Difference]: Start difference. First operand has 162 states, 102 states have (on average 1.2941176470588236) internal successors, (132), 103 states have internal predecessors, (132), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-29 04:11:34,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:34,522 INFO L93 Difference]: Finished difference Result 349 states and 500 transitions. [2023-11-29 04:11:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:11:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 122 [2023-11-29 04:11:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:34,538 INFO L225 Difference]: With dead ends: 349 [2023-11-29 04:11:34,538 INFO L226 Difference]: Without dead ends: 207 [2023-11-29 04:11:34,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 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 04:11:34,547 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 258 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:34,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 172 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 04:11:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-29 04:11:34,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 160. [2023-11-29 04:11:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 100 states have (on average 1.25) internal successors, (125), 102 states have internal predecessors, (125), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:11:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 206 transitions. [2023-11-29 04:11:34,613 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 206 transitions. Word has length 122 [2023-11-29 04:11:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:34,614 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 206 transitions. [2023-11-29 04:11:34,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-29 04:11:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 206 transitions. [2023-11-29 04:11:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 04:11:34,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:34,620 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-11-29 04:11:34,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:11:34,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:34,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash -403471221, now seen corresponding path program 1 times [2023-11-29 04:11:34,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418067987] [2023-11-29 04:11:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:34,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 04:11:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 04:11:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:11:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 04:11:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 04:11:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:11:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 04:11:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-29 04:11:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 04:11:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 04:11:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 04:11:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-29 04:11:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 04:11:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-29 04:11:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:11:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 04:11:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 04:11:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-29 04:11:35,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418067987] [2023-11-29 04:11:35,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418067987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:35,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:35,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 04:11:35,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234106337] [2023-11-29 04:11:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:35,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:11:35,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:11:35,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:11:35,727 INFO L87 Difference]: Start difference. First operand 160 states and 206 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (24), 6 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-29 04:11:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:37,946 INFO L93 Difference]: Finished difference Result 300 states and 391 transitions. [2023-11-29 04:11:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:11:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (24), 6 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 137 [2023-11-29 04:11:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:37,949 INFO L225 Difference]: With dead ends: 300 [2023-11-29 04:11:37,950 INFO L226 Difference]: Without dead ends: 211 [2023-11-29 04:11:37,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 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 04:11:37,952 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 265 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:37,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 187 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 04:11:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-29 04:11:37,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 160. [2023-11-29 04:11:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 100 states have (on average 1.24) internal successors, (124), 102 states have internal predecessors, (124), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-29 04:11:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 205 transitions. [2023-11-29 04:11:37,984 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 205 transitions. Word has length 137 [2023-11-29 04:11:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:37,985 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 205 transitions. [2023-11-29 04:11:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (24), 6 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-29 04:11:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 205 transitions. [2023-11-29 04:11:37,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-29 04:11:37,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:37,990 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1] [2023-11-29 04:11:37,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:11:37,990 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:37,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:37,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1454877945, now seen corresponding path program 1 times [2023-11-29 04:11:37,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:37,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886583214] [2023-11-29 04:11:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:37,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 04:11:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 04:11:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:11:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 04:11:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 04:11:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-29 04:11:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 04:11:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-29 04:11:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 04:11:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 04:11:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 04:11:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-29 04:11:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-29 04:11:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 04:11:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-29 04:11:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:11:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:11:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:38,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:39,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:11:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 04:11:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:39,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2023-11-29 04:11:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-29 04:11:39,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:39,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886583214] [2023-11-29 04:11:39,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886583214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:39,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:39,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 04:11:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388043590] [2023-11-29 04:11:39,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:39,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:11:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:11:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:11:39,037 INFO L87 Difference]: Start difference. First operand 160 states and 205 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-11-29 04:11:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:41,314 INFO L93 Difference]: Finished difference Result 314 states and 410 transitions. [2023-11-29 04:11:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:11:41,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 145 [2023-11-29 04:11:41,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:41,317 INFO L225 Difference]: With dead ends: 314 [2023-11-29 04:11:41,317 INFO L226 Difference]: Without dead ends: 192 [2023-11-29 04:11:41,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:11:41,319 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 324 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:41,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 251 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 04:11:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-29 04:11:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2023-11-29 04:11:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 101 states have (on average 1.2376237623762376) internal successors, (125), 104 states have internal predecessors, (125), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (42), 40 states have call predecessors, (42), 40 states have call successors, (42) [2023-11-29 04:11:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 208 transitions. [2023-11-29 04:11:41,346 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 208 transitions. Word has length 145 [2023-11-29 04:11:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:41,347 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 208 transitions. [2023-11-29 04:11:41,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2023-11-29 04:11:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 208 transitions. [2023-11-29 04:11:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-29 04:11:41,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:41,351 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:41,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:11:41,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:41,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash -522120303, now seen corresponding path program 1 times [2023-11-29 04:11:41,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:41,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695286181] [2023-11-29 04:11:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:41,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:41,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:41,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883957883] [2023-11-29 04:11:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:41,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:41,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:41,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:41,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:11:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:42,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:11:42,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-29 04:11:42,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:11:42,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:42,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695286181] [2023-11-29 04:11:42,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:11:42,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883957883] [2023-11-29 04:11:42,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883957883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:42,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:42,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:11:42,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86268585] [2023-11-29 04:11:42,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:42,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:11:42,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:11:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:11:42,187 INFO L87 Difference]: Start difference. First operand 162 states and 208 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-29 04:11:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:42,545 INFO L93 Difference]: Finished difference Result 254 states and 322 transitions. [2023-11-29 04:11:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:11:42,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 158 [2023-11-29 04:11:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:42,548 INFO L225 Difference]: With dead ends: 254 [2023-11-29 04:11:42,548 INFO L226 Difference]: Without dead ends: 162 [2023-11-29 04:11:42,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 153 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 04:11:42,550 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 48 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:42,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 795 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:11:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-29 04:11:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-11-29 04:11:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 104 states have internal predecessors, (124), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (42), 40 states have call predecessors, (42), 40 states have call successors, (42) [2023-11-29 04:11:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 207 transitions. [2023-11-29 04:11:42,573 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 207 transitions. Word has length 158 [2023-11-29 04:11:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:42,573 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 207 transitions. [2023-11-29 04:11:42,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2023-11-29 04:11:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 207 transitions. [2023-11-29 04:11:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-29 04:11:42,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:42,577 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:42,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:11:42,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:42,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:42,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1309939914, now seen corresponding path program 1 times [2023-11-29 04:11:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:42,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926111593] [2023-11-29 04:11:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:42,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847684143] [2023-11-29 04:11:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:42,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:42,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:42,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:42,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:11:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:43,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:43,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-29 04:11:43,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:11:43,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:43,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926111593] [2023-11-29 04:11:43,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:11:43,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847684143] [2023-11-29 04:11:43,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847684143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:43,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:43,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 04:11:43,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698632969] [2023-11-29 04:11:43,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:43,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:11:43,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:11:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:11:43,575 INFO L87 Difference]: Start difference. First operand 162 states and 207 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-29 04:11:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:44,213 INFO L93 Difference]: Finished difference Result 267 states and 340 transitions. [2023-11-29 04:11:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:11:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 174 [2023-11-29 04:11:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:44,216 INFO L225 Difference]: With dead ends: 267 [2023-11-29 04:11:44,216 INFO L226 Difference]: Without dead ends: 162 [2023-11-29 04:11:44,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 168 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 04:11:44,218 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 99 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:44,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1059 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 04:11:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-29 04:11:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-11-29 04:11:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 104 states have internal predecessors, (124), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-29 04:11:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2023-11-29 04:11:44,235 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 174 [2023-11-29 04:11:44,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:44,235 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2023-11-29 04:11:44,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-29 04:11:44,236 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2023-11-29 04:11:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 04:11:44,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:44,238 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:44,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:11:44,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:44,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:44,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:44,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1886100256, now seen corresponding path program 1 times [2023-11-29 04:11:44,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:44,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426400708] [2023-11-29 04:11:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:44,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:44,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:44,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654390165] [2023-11-29 04:11:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:44,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:44,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:44,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:44,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:11:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:45,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:11:45,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-29 04:11:45,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:11:45,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:45,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426400708] [2023-11-29 04:11:45,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:11:45,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654390165] [2023-11-29 04:11:45,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654390165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:45,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:45,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:11:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343827823] [2023-11-29 04:11:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:45,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:45,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:11:45,138 INFO L87 Difference]: Start difference. First operand 162 states and 206 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:45,505 INFO L93 Difference]: Finished difference Result 265 states and 335 transitions. [2023-11-29 04:11:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:11:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 187 [2023-11-29 04:11:45,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:45,508 INFO L225 Difference]: With dead ends: 265 [2023-11-29 04:11:45,508 INFO L226 Difference]: Without dead ends: 172 [2023-11-29 04:11:45,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:11:45,510 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 7 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:45,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 739 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:11:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-29 04:11:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2023-11-29 04:11:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 107 states have (on average 1.233644859813084) internal successors, (132), 110 states have internal predecessors, (132), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-29 04:11:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 214 transitions. [2023-11-29 04:11:45,532 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 214 transitions. Word has length 187 [2023-11-29 04:11:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:45,533 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 214 transitions. [2023-11-29 04:11:45,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 214 transitions. [2023-11-29 04:11:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 04:11:45,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:45,537 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:45,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:11:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:11:45,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:45,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1441516386, now seen corresponding path program 1 times [2023-11-29 04:11:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945025092] [2023-11-29 04:11:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:45,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:45,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947323413] [2023-11-29 04:11:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:45,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:45,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:45,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:45,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:11:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:46,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 2712 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:11:46,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-29 04:11:46,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:11:46,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:46,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945025092] [2023-11-29 04:11:46,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:11:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947323413] [2023-11-29 04:11:46,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947323413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:46,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:46,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:11:46,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650187016] [2023-11-29 04:11:46,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:46,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:11:46,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:46,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:11:46,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:11:46,555 INFO L87 Difference]: Start difference. First operand 168 states and 214 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:47,733 INFO L93 Difference]: Finished difference Result 280 states and 356 transitions. [2023-11-29 04:11:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:11:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 187 [2023-11-29 04:11:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:47,735 INFO L225 Difference]: With dead ends: 280 [2023-11-29 04:11:47,735 INFO L226 Difference]: Without dead ends: 181 [2023-11-29 04:11:47,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 182 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 04:11:47,736 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 18 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:47,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 847 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:11:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-29 04:11:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 172. [2023-11-29 04:11:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 114 states have internal predecessors, (137), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-29 04:11:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 219 transitions. [2023-11-29 04:11:47,755 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 219 transitions. Word has length 187 [2023-11-29 04:11:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:47,756 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 219 transitions. [2023-11-29 04:11:47,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 219 transitions. [2023-11-29 04:11:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 04:11:47,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:47,759 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:47,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:11:47,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:47,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:47,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:47,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1934142560, now seen corresponding path program 1 times [2023-11-29 04:11:47,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:47,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437297968] [2023-11-29 04:11:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:47,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:48,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:48,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499316936] [2023-11-29 04:11:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:48,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:48,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:48,050 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:48,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:11:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:48,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:11:48,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-29 04:11:48,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:11:48,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437297968] [2023-11-29 04:11:48,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:11:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499316936] [2023-11-29 04:11:48,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499316936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:48,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:48,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:11:48,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625473438] [2023-11-29 04:11:48,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:48,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:11:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:11:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:11:48,670 INFO L87 Difference]: Start difference. First operand 172 states and 219 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:48,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:48,904 INFO L93 Difference]: Finished difference Result 279 states and 352 transitions. [2023-11-29 04:11:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:11:48,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 187 [2023-11-29 04:11:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:48,906 INFO L225 Difference]: With dead ends: 279 [2023-11-29 04:11:48,906 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 04:11:48,907 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 04:11:48,907 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 2 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:48,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 554 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:11:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 04:11:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2023-11-29 04:11:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 118 states have internal predecessors, (141), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-29 04:11:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2023-11-29 04:11:48,921 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 187 [2023-11-29 04:11:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:48,921 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2023-11-29 04:11:48,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2023-11-29 04:11:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 04:11:48,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:48,925 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:48,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:11:49,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:49,129 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:49,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1144671010, now seen corresponding path program 1 times [2023-11-29 04:11:49,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:49,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577215213] [2023-11-29 04:11:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:49,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:49,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:49,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317015003] [2023-11-29 04:11:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:49,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:49,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:49,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:49,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:11:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:49,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 04:11:49,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 04:11:50,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:11:50,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:50,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577215213] [2023-11-29 04:11:50,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:11:50,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317015003] [2023-11-29 04:11:50,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317015003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:50,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:50,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 04:11:50,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889180871] [2023-11-29 04:11:50,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:11:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:11:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:11:50,064 INFO L87 Difference]: Start difference. First operand 176 states and 223 transitions. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 6 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2023-11-29 04:11:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:51,849 INFO L93 Difference]: Finished difference Result 306 states and 389 transitions. [2023-11-29 04:11:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:11:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 6 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 187 [2023-11-29 04:11:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:51,852 INFO L225 Difference]: With dead ends: 306 [2023-11-29 04:11:51,852 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 04:11:51,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 179 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 04:11:51,854 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 106 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:51,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1492 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 04:11:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 04:11:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 187. [2023-11-29 04:11:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.232) internal successors, (154), 128 states have internal predecessors, (154), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2023-11-29 04:11:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 239 transitions. [2023-11-29 04:11:51,875 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 239 transitions. Word has length 187 [2023-11-29 04:11:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:51,876 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 239 transitions. [2023-11-29 04:11:51,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 6 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2023-11-29 04:11:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 239 transitions. [2023-11-29 04:11:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 04:11:51,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:51,879 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:51,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:11:52,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:52,090 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:52,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2168544, now seen corresponding path program 1 times [2023-11-29 04:11:52,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146039869] [2023-11-29 04:11:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:52,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:52,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:52,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788946265] [2023-11-29 04:11:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:52,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:52,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:52,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:52,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:11:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:52,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:11:52,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-29 04:11:52,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:11:52,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:52,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146039869] [2023-11-29 04:11:52,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:11:52,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788946265] [2023-11-29 04:11:52,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788946265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:52,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:52,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:11:52,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269611838] [2023-11-29 04:11:52,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:52,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:11:52,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:52,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:11:52,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:11:52,739 INFO L87 Difference]: Start difference. First operand 187 states and 239 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:52,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:52,997 INFO L93 Difference]: Finished difference Result 320 states and 413 transitions. [2023-11-29 04:11:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:11:52,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 187 [2023-11-29 04:11:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:53,000 INFO L225 Difference]: With dead ends: 320 [2023-11-29 04:11:53,000 INFO L226 Difference]: Without dead ends: 187 [2023-11-29 04:11:53,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 185 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 04:11:53,001 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 7 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:53,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:11:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-29 04:11:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-29 04:11:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.224) internal successors, (153), 128 states have internal predecessors, (153), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2023-11-29 04:11:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 238 transitions. [2023-11-29 04:11:53,021 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 238 transitions. Word has length 187 [2023-11-29 04:11:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:53,021 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 238 transitions. [2023-11-29 04:11:53,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 238 transitions. [2023-11-29 04:11:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-29 04:11:53,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:53,024 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:53,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:11:53,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:11:53,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:53,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:53,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1808846586, now seen corresponding path program 1 times [2023-11-29 04:11:53,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:53,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030748212] [2023-11-29 04:11:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:53,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:53,294 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:53,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614987486] [2023-11-29 04:11:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:53,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:53,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:53,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:11:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:53,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:53,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-29 04:11:53,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:11:53,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:53,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030748212] [2023-11-29 04:11:53,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:11:53,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614987486] [2023-11-29 04:11:53,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614987486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:53,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:53,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:11:53,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210755985] [2023-11-29 04:11:53,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:53,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:53,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:11:53,915 INFO L87 Difference]: Start difference. First operand 187 states and 238 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:54,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:11:54,819 INFO L93 Difference]: Finished difference Result 320 states and 411 transitions. [2023-11-29 04:11:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:11:54,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 189 [2023-11-29 04:11:54,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:11:54,822 INFO L225 Difference]: With dead ends: 320 [2023-11-29 04:11:54,822 INFO L226 Difference]: Without dead ends: 187 [2023-11-29 04:11:54,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:11:54,823 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 10 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:11:54,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 685 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:11:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-29 04:11:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-29 04:11:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.216) internal successors, (152), 128 states have internal predecessors, (152), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2023-11-29 04:11:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 237 transitions. [2023-11-29 04:11:54,842 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 237 transitions. Word has length 189 [2023-11-29 04:11:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:11:54,842 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 237 transitions. [2023-11-29 04:11:54,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:11:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 237 transitions. [2023-11-29 04:11:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-29 04:11:54,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:11:54,844 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:11:54,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:11:55,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:11:55,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:11:55,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:55,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2049086332, now seen corresponding path program 1 times [2023-11-29 04:11:55,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:55,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883823192] [2023-11-29 04:11:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:55,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:55,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:11:55,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195617095] [2023-11-29 04:11:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:55,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:55,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:55,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:11:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:55,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 04:11:55,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:55,877 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 04:11:59,961 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 04:12:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 04:12:28,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:12:28,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883823192] [2023-11-29 04:12:28,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:12:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195617095] [2023-11-29 04:12:28,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195617095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:12:28,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:12:28,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-29 04:12:28,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903501752] [2023-11-29 04:12:28,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:12:28,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:12:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:12:28,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=188, Unknown=8, NotChecked=0, Total=240 [2023-11-29 04:12:28,469 INFO L87 Difference]: Start difference. First operand 187 states and 237 transitions. Second operand has 16 states, 14 states have (on average 6.642857142857143) internal successors, (93), 15 states have internal predecessors, (93), 9 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) [2023-11-29 04:12:31,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:13:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:34,112 INFO L93 Difference]: Finished difference Result 462 states and 584 transitions. [2023-11-29 04:13:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:13:34,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 6.642857142857143) internal successors, (93), 15 states have internal predecessors, (93), 9 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) Word has length 189 [2023-11-29 04:13:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:34,115 INFO L225 Difference]: With dead ends: 462 [2023-11-29 04:13:34,115 INFO L226 Difference]: Without dead ends: 354 [2023-11-29 04:13:34,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 93.0s TimeCoverageRelationStatistics Valid=152, Invalid=637, Unknown=23, NotChecked=0, Total=812 [2023-11-29 04:13:34,117 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 230 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:34,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1952 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-29 04:13:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-29 04:13:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 346. [2023-11-29 04:13:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 235 states have (on average 1.2297872340425533) internal successors, (289), 241 states have internal predecessors, (289), 71 states have call successors, (71), 35 states have call predecessors, (71), 39 states have return successors, (84), 71 states have call predecessors, (84), 69 states have call successors, (84) [2023-11-29 04:13:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 444 transitions. [2023-11-29 04:13:34,148 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 444 transitions. Word has length 189 [2023-11-29 04:13:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:34,149 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 444 transitions. [2023-11-29 04:13:34,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 6.642857142857143) internal successors, (93), 15 states have internal predecessors, (93), 9 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) [2023-11-29 04:13:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 444 transitions. [2023-11-29 04:13:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-29 04:13:34,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:34,152 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:34,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:13:34,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:13:34,353 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:34,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1846823674, now seen corresponding path program 1 times [2023-11-29 04:13:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:34,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696644454] [2023-11-29 04:13:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:34,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:34,420 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:34,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030156549] [2023-11-29 04:13:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:34,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:34,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:34,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:13:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:34,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 2714 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:13:34,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-29 04:13:34,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:13:34,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696644454] [2023-11-29 04:13:34,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:34,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030156549] [2023-11-29 04:13:34,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030156549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:34,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:34,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:13:34,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462463409] [2023-11-29 04:13:34,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:34,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:13:34,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:34,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:13:34,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:13:34,919 INFO L87 Difference]: Start difference. First operand 346 states and 444 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, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:13:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:35,251 INFO L93 Difference]: Finished difference Result 558 states and 708 transitions. [2023-11-29 04:13:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:13:35,252 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, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 189 [2023-11-29 04:13:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:35,254 INFO L225 Difference]: With dead ends: 558 [2023-11-29 04:13:35,255 INFO L226 Difference]: Without dead ends: 340 [2023-11-29 04:13:35,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 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 04:13:35,256 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 2 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:35,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 553 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:13:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-29 04:13:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 324. [2023-11-29 04:13:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 214 states have (on average 1.2149532710280373) internal successors, (260), 220 states have internal predecessors, (260), 71 states have call successors, (71), 35 states have call predecessors, (71), 38 states have return successors, (81), 70 states have call predecessors, (81), 69 states have call successors, (81) [2023-11-29 04:13:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 412 transitions. [2023-11-29 04:13:35,316 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 412 transitions. Word has length 189 [2023-11-29 04:13:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:35,316 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 412 transitions. [2023-11-29 04:13:35,317 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, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-29 04:13:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 412 transitions. [2023-11-29 04:13:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-29 04:13:35,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:35,320 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:35,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:13:35,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:35,521 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:35,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1186224082, now seen corresponding path program 1 times [2023-11-29 04:13:35,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:35,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633854157] [2023-11-29 04:13:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:35,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:35,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:35,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121452241] [2023-11-29 04:13:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:35,609 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:35,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:13:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:36,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 2734 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:13:36,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-29 04:13:36,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:13:36,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633854157] [2023-11-29 04:13:36,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121452241] [2023-11-29 04:13:36,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121452241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:36,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:36,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:13:36,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779579618] [2023-11-29 04:13:36,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:36,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:13:36,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:13:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:13:36,258 INFO L87 Difference]: Start difference. First operand 324 states and 412 transitions. Second operand has 6 states, 5 states have (on average 16.2) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-11-29 04:13:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:36,694 INFO L93 Difference]: Finished difference Result 512 states and 648 transitions. [2023-11-29 04:13:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:13:36,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.2) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 194 [2023-11-29 04:13:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:36,698 INFO L225 Difference]: With dead ends: 512 [2023-11-29 04:13:36,698 INFO L226 Difference]: Without dead ends: 324 [2023-11-29 04:13:36,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 189 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 04:13:36,699 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 9 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:36,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 909 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:13:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-29 04:13:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2023-11-29 04:13:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 214 states have (on average 1.205607476635514) internal successors, (258), 220 states have internal predecessors, (258), 71 states have call successors, (71), 35 states have call predecessors, (71), 38 states have return successors, (81), 70 states have call predecessors, (81), 69 states have call successors, (81) [2023-11-29 04:13:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 410 transitions. [2023-11-29 04:13:36,741 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 410 transitions. Word has length 194 [2023-11-29 04:13:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:36,742 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 410 transitions. [2023-11-29 04:13:36,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.2) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-11-29 04:13:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 410 transitions. [2023-11-29 04:13:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-29 04:13:36,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:36,745 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:36,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:13:36,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:36,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:36,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:36,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1983557142, now seen corresponding path program 1 times [2023-11-29 04:13:36,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:36,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186170243] [2023-11-29 04:13:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:36,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:37,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:37,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723022294] [2023-11-29 04:13:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:37,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:37,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:13:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:37,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 2742 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:13:37,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-29 04:13:37,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:13:37,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186170243] [2023-11-29 04:13:37,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723022294] [2023-11-29 04:13:37,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723022294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:37,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:37,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:13:37,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049255275] [2023-11-29 04:13:37,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:37,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:13:37,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:13:37,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:13:37,635 INFO L87 Difference]: Start difference. First operand 324 states and 410 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-29 04:13:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:38,098 INFO L93 Difference]: Finished difference Result 534 states and 693 transitions. [2023-11-29 04:13:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:13:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 196 [2023-11-29 04:13:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:38,101 INFO L225 Difference]: With dead ends: 534 [2023-11-29 04:13:38,101 INFO L226 Difference]: Without dead ends: 332 [2023-11-29 04:13:38,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 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 04:13:38,103 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 6 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:38,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 532 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:13:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-29 04:13:38,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 326. [2023-11-29 04:13:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 216 states have (on average 1.2037037037037037) internal successors, (260), 222 states have internal predecessors, (260), 71 states have call successors, (71), 35 states have call predecessors, (71), 38 states have return successors, (81), 70 states have call predecessors, (81), 69 states have call successors, (81) [2023-11-29 04:13:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 412 transitions. [2023-11-29 04:13:38,131 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 412 transitions. Word has length 196 [2023-11-29 04:13:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:38,131 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 412 transitions. [2023-11-29 04:13:38,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-29 04:13:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 412 transitions. [2023-11-29 04:13:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-29 04:13:38,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:38,134 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:38,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 04:13:38,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:38,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:38,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash -260569224, now seen corresponding path program 1 times [2023-11-29 04:13:38,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:38,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040402969] [2023-11-29 04:13:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:38,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:38,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:38,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702491823] [2023-11-29 04:13:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:38,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:38,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:38,402 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:38,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:13:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:38,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 2754 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:13:38,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-29 04:13:39,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 04:13:39,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:39,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040402969] [2023-11-29 04:13:39,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:39,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702491823] [2023-11-29 04:13:39,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702491823] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:13:39,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:13:39,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 13 [2023-11-29 04:13:39,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682645501] [2023-11-29 04:13:39,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:39,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:13:39,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:39,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:13:39,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:13:39,446 INFO L87 Difference]: Start difference. First operand 326 states and 412 transitions. Second operand has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-11-29 04:13:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:39,999 INFO L93 Difference]: Finished difference Result 497 states and 622 transitions. [2023-11-29 04:13:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:13:40,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 196 [2023-11-29 04:13:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:40,003 INFO L225 Difference]: With dead ends: 497 [2023-11-29 04:13:40,003 INFO L226 Difference]: Without dead ends: 305 [2023-11-29 04:13:40,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 378 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:13:40,004 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 6 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:40,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 547 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:13:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-29 04:13:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2023-11-29 04:13:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 203 states have (on average 1.2019704433497538) internal successors, (244), 208 states have internal predecessors, (244), 65 states have call successors, (65), 34 states have call predecessors, (65), 34 states have return successors, (72), 61 states have call predecessors, (72), 64 states have call successors, (72) [2023-11-29 04:13:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 381 transitions. [2023-11-29 04:13:40,032 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 381 transitions. Word has length 196 [2023-11-29 04:13:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:40,033 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 381 transitions. [2023-11-29 04:13:40,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-11-29 04:13:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 381 transitions. [2023-11-29 04:13:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-11-29 04:13:40,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:40,035 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:40,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:13:40,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:40,236 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:40,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash -650129461, now seen corresponding path program 1 times [2023-11-29 04:13:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:40,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559234619] [2023-11-29 04:13:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:40,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:40,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041666928] [2023-11-29 04:13:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:40,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:40,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:40,321 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:40,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:13:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:40,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 04:13:40,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-29 04:13:40,935 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:13:40,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:40,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559234619] [2023-11-29 04:13:40,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:40,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041666928] [2023-11-29 04:13:40,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041666928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:40,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:40,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:13:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931886168] [2023-11-29 04:13:40,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:40,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:13:40,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:13:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:13:40,937 INFO L87 Difference]: Start difference. First operand 303 states and 381 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-29 04:13:41,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:41,252 INFO L93 Difference]: Finished difference Result 437 states and 559 transitions. [2023-11-29 04:13:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:13:41,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 197 [2023-11-29 04:13:41,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:41,254 INFO L225 Difference]: With dead ends: 437 [2023-11-29 04:13:41,255 INFO L226 Difference]: Without dead ends: 319 [2023-11-29 04:13:41,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:13:41,256 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 4 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:41,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 747 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:13:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-29 04:13:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 311. [2023-11-29 04:13:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 209 states have (on average 1.1961722488038278) internal successors, (250), 214 states have internal predecessors, (250), 65 states have call successors, (65), 34 states have call predecessors, (65), 36 states have return successors, (79), 63 states have call predecessors, (79), 64 states have call successors, (79) [2023-11-29 04:13:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 394 transitions. [2023-11-29 04:13:41,294 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 394 transitions. Word has length 197 [2023-11-29 04:13:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:41,294 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 394 transitions. [2023-11-29 04:13:41,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-29 04:13:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 394 transitions. [2023-11-29 04:13:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-29 04:13:41,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:41,297 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:41,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:13:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:41,498 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:41,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1242234606, now seen corresponding path program 1 times [2023-11-29 04:13:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507859496] [2023-11-29 04:13:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:41,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:41,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907699511] [2023-11-29 04:13:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:41,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:41,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:41,556 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:41,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:13:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:42,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:13:42,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-29 04:13:42,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-11-29 04:13:42,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:42,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507859496] [2023-11-29 04:13:42,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:42,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907699511] [2023-11-29 04:13:42,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907699511] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:13:42,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:13:42,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2023-11-29 04:13:42,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308019505] [2023-11-29 04:13:42,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:42,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:13:42,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:13:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:13:42,302 INFO L87 Difference]: Start difference. First operand 311 states and 394 transitions. Second operand has 6 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) [2023-11-29 04:13:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:42,684 INFO L93 Difference]: Finished difference Result 319 states and 402 transitions. [2023-11-29 04:13:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:13:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) Word has length 199 [2023-11-29 04:13:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:42,688 INFO L225 Difference]: With dead ends: 319 [2023-11-29 04:13:42,688 INFO L226 Difference]: Without dead ends: 317 [2023-11-29 04:13:42,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:13:42,689 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 6 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:42,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 920 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:13:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-29 04:13:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2023-11-29 04:13:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 212 states have (on average 1.1933962264150944) internal successors, (253), 217 states have internal predecessors, (253), 66 states have call successors, (66), 35 states have call predecessors, (66), 37 states have return successors, (80), 64 states have call predecessors, (80), 65 states have call successors, (80) [2023-11-29 04:13:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 399 transitions. [2023-11-29 04:13:42,716 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 399 transitions. Word has length 199 [2023-11-29 04:13:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:42,717 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 399 transitions. [2023-11-29 04:13:42,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 1 states have call successors, (28) [2023-11-29 04:13:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 399 transitions. [2023-11-29 04:13:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 04:13:42,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:42,719 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:13:42,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:13:42,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:42,920 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:42,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2094293973, now seen corresponding path program 2 times [2023-11-29 04:13:42,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:42,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339902179] [2023-11-29 04:13:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:42,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:42,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:42,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401464483] [2023-11-29 04:13:42,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:13:42,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:42,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:42,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:13:43,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:13:43,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:13:43,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 2781 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:13:43,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 04:13:43,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-29 04:13:43,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:43,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339902179] [2023-11-29 04:13:43,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:43,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401464483] [2023-11-29 04:13:43,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401464483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:13:43,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:13:43,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2023-11-29 04:13:43,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346812312] [2023-11-29 04:13:43,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:13:43,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:13:43,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:43,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:13:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:13:43,943 INFO L87 Difference]: Start difference. First operand 316 states and 399 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-29 04:13:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:44,402 INFO L93 Difference]: Finished difference Result 343 states and 431 transitions. [2023-11-29 04:13:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:13:44,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 201 [2023-11-29 04:13:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:44,405 INFO L225 Difference]: With dead ends: 343 [2023-11-29 04:13:44,405 INFO L226 Difference]: Without dead ends: 317 [2023-11-29 04:13:44,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:13:44,406 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 1 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:44,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1108 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:13:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-29 04:13:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2023-11-29 04:13:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 213 states have (on average 1.192488262910798) internal successors, (254), 217 states have internal predecessors, (254), 66 states have call successors, (66), 35 states have call predecessors, (66), 37 states have return successors, (80), 65 states have call predecessors, (80), 65 states have call successors, (80) [2023-11-29 04:13:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 400 transitions. [2023-11-29 04:13:44,431 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 400 transitions. Word has length 201 [2023-11-29 04:13:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:44,431 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 400 transitions. [2023-11-29 04:13:44,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-29 04:13:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 400 transitions. [2023-11-29 04:13:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 04:13:44,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:44,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 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, 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 04:13:44,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:13:44,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:44,634 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:44,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:44,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1462949656, now seen corresponding path program 3 times [2023-11-29 04:13:44,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:44,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223462316] [2023-11-29 04:13:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:44,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:44,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:44,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105947928] [2023-11-29 04:13:44,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:13:44,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:44,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:44,695 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:44,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:13:45,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:13:45,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:13:45,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 2005 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:13:45,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-29 04:13:45,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-29 04:13:46,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:46,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223462316] [2023-11-29 04:13:46,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:46,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105947928] [2023-11-29 04:13:46,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105947928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:13:46,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:13:46,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2023-11-29 04:13:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385799369] [2023-11-29 04:13:46,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:13:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:13:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:13:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:13:46,032 INFO L87 Difference]: Start difference. First operand 317 states and 400 transitions. Second operand has 12 states, 11 states have (on average 9.363636363636363) internal successors, (103), 12 states have internal predecessors, (103), 4 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) [2023-11-29 04:13:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:47,574 INFO L93 Difference]: Finished difference Result 542 states and 707 transitions. [2023-11-29 04:13:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:13:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 9.363636363636363) internal successors, (103), 12 states have internal predecessors, (103), 4 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) Word has length 203 [2023-11-29 04:13:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:47,578 INFO L225 Difference]: With dead ends: 542 [2023-11-29 04:13:47,578 INFO L226 Difference]: Without dead ends: 341 [2023-11-29 04:13:47,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:13:47,579 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 24 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:47,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1897 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 04:13:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-29 04:13:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 329. [2023-11-29 04:13:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 225 states have (on average 1.208888888888889) internal successors, (272), 229 states have internal predecessors, (272), 66 states have call successors, (66), 35 states have call predecessors, (66), 37 states have return successors, (80), 65 states have call predecessors, (80), 65 states have call successors, (80) [2023-11-29 04:13:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 418 transitions. [2023-11-29 04:13:47,616 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 418 transitions. Word has length 203 [2023-11-29 04:13:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:47,617 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 418 transitions. [2023-11-29 04:13:47,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 9.363636363636363) internal successors, (103), 12 states have internal predecessors, (103), 4 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) [2023-11-29 04:13:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 418 transitions. [2023-11-29 04:13:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-29 04:13:47,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:47,620 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 6, 6, 6, 6, 4, 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, 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 04:13:47,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:13:47,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:47,821 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:47,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:47,822 INFO L85 PathProgramCache]: Analyzing trace with hash -820489727, now seen corresponding path program 1 times [2023-11-29 04:13:47,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:47,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309940119] [2023-11-29 04:13:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:47,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:47,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:47,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083364374] [2023-11-29 04:13:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:47,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:47,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:47,908 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:47,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:13:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:48,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:13:48,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-11-29 04:13:48,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:13:48,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:48,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309940119] [2023-11-29 04:13:48,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:48,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083364374] [2023-11-29 04:13:48,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083364374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:13:48,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:13:48,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 04:13:48,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186547437] [2023-11-29 04:13:48,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:13:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:13:48,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:13:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:13:48,672 INFO L87 Difference]: Start difference. First operand 329 states and 418 transitions. Second operand has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) [2023-11-29 04:13:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:49,200 INFO L93 Difference]: Finished difference Result 460 states and 586 transitions. [2023-11-29 04:13:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:13:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) Word has length 219 [2023-11-29 04:13:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:49,204 INFO L225 Difference]: With dead ends: 460 [2023-11-29 04:13:49,204 INFO L226 Difference]: Without dead ends: 325 [2023-11-29 04:13:49,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 213 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 04:13:49,206 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 44 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:49,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1099 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:13:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-29 04:13:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-11-29 04:13:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 223 states have (on average 1.201793721973094) internal successors, (268), 225 states have internal predecessors, (268), 66 states have call successors, (66), 35 states have call predecessors, (66), 35 states have return successors, (78), 65 states have call predecessors, (78), 65 states have call successors, (78) [2023-11-29 04:13:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 412 transitions. [2023-11-29 04:13:49,254 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 412 transitions. Word has length 219 [2023-11-29 04:13:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:49,255 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 412 transitions. [2023-11-29 04:13:49,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) [2023-11-29 04:13:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 412 transitions. [2023-11-29 04:13:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-11-29 04:13:49,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:49,259 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 6, 6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:13:49,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:13:49,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:49,460 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:49,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:49,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1138044484, now seen corresponding path program 4 times [2023-11-29 04:13:49,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:49,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718357306] [2023-11-29 04:13:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:49,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:49,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:49,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007365076] [2023-11-29 04:13:49,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:13:49,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:49,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:49,568 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:49,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:13:50,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:13:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:13:50,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 2848 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:13:50,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 125 proven. 11 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-29 04:13:50,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2023-11-29 04:13:50,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718357306] [2023-11-29 04:13:50,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007365076] [2023-11-29 04:13:50,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007365076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:13:50,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:13:50,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-11-29 04:13:50,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208484659] [2023-11-29 04:13:50,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:13:50,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:13:50,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:13:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:13:50,719 INFO L87 Difference]: Start difference. First operand 325 states and 412 transitions. Second operand has 16 states, 14 states have (on average 7.428571428571429) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (33), 2 states have call predecessors, (33), 6 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2023-11-29 04:13:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:13:52,189 INFO L93 Difference]: Finished difference Result 448 states and 575 transitions. [2023-11-29 04:13:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:13:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 7.428571428571429) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (33), 2 states have call predecessors, (33), 6 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 221 [2023-11-29 04:13:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:13:52,193 INFO L225 Difference]: With dead ends: 448 [2023-11-29 04:13:52,193 INFO L226 Difference]: Without dead ends: 334 [2023-11-29 04:13:52,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 425 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:13:52,195 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 19 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:13:52,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1907 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 04:13:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-29 04:13:52,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 326. [2023-11-29 04:13:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 224 states have (on average 1.2008928571428572) internal successors, (269), 226 states have internal predecessors, (269), 66 states have call successors, (66), 35 states have call predecessors, (66), 35 states have return successors, (78), 65 states have call predecessors, (78), 65 states have call successors, (78) [2023-11-29 04:13:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 413 transitions. [2023-11-29 04:13:52,232 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 413 transitions. Word has length 221 [2023-11-29 04:13:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:13:52,232 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 413 transitions. [2023-11-29 04:13:52,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 7.428571428571429) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (33), 2 states have call predecessors, (33), 6 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2023-11-29 04:13:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 413 transitions. [2023-11-29 04:13:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-29 04:13:52,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:13:52,235 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 6, 6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:13:52,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:13:52,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 04:13:52,436 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:13:52,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash -72419421, now seen corresponding path program 5 times [2023-11-29 04:13:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:52,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375176733] [2023-11-29 04:13:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:52,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:52,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:13:52,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398228770] [2023-11-29 04:13:52,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:13:52,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:52,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:52,543 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:52,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:13:53,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 04:13:53,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:13:53,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 04:13:53,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 86 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-29 04:13:58,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2023-11-29 04:13:58,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:58,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375176733] [2023-11-29 04:13:58,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:13:58,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398228770] [2023-11-29 04:13:58,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398228770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:13:58,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:13:58,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 27 [2023-11-29 04:13:58,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293970529] [2023-11-29 04:13:58,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:13:58,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:13:58,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:58,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:13:58,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=625, Unknown=1, NotChecked=0, Total=702 [2023-11-29 04:13:58,903 INFO L87 Difference]: Start difference. First operand 326 states and 413 transitions. Second operand has 27 states, 25 states have (on average 5.64) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (40), 3 states have call predecessors, (40), 8 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2023-11-29 04:14:10,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:14:18,718 WARN L539 Checker$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 04:14:26,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:14:30,792 WARN L539 Checker$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 04:15:11,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:15:15,717 WARN L539 Checker$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 04:15:19,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:15:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:19,751 INFO L93 Difference]: Finished difference Result 772 states and 966 transitions. [2023-11-29 04:15:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 04:15:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 5.64) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (40), 3 states have call predecessors, (40), 8 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) Word has length 222 [2023-11-29 04:15:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:19,756 INFO L225 Difference]: With dead ends: 772 [2023-11-29 04:15:19,756 INFO L226 Difference]: Without dead ends: 562 [2023-11-29 04:15:19,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=208, Invalid=1850, Unknown=12, NotChecked=0, Total=2070 [2023-11-29 04:15:19,758 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 177 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 16 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2633 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:19,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 2633 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1617 Invalid, 7 Unknown, 0 Unchecked, 32.7s Time] [2023-11-29 04:15:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-11-29 04:15:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 541. [2023-11-29 04:15:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 379 states have (on average 1.2110817941952507) internal successors, (459), 385 states have internal predecessors, (459), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (122), 96 states have call predecessors, (122), 101 states have call successors, (122) [2023-11-29 04:15:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 683 transitions. [2023-11-29 04:15:19,827 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 683 transitions. Word has length 222 [2023-11-29 04:15:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:19,828 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 683 transitions. [2023-11-29 04:15:19,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 5.64) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (40), 3 states have call predecessors, (40), 8 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2023-11-29 04:15:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 683 transitions. [2023-11-29 04:15:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-29 04:15:19,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:19,832 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:19,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:15:20,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:20,040 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:20,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1755353746, now seen corresponding path program 1 times [2023-11-29 04:15:20,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:20,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350111188] [2023-11-29 04:15:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:20,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:20,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:20,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476439910] [2023-11-29 04:15:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:20,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:20,125 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:20,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:15:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:20,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 2873 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 04:15:20,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 90 proven. 17 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-11-29 04:15:20,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-29 04:15:21,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:21,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350111188] [2023-11-29 04:15:21,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:21,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476439910] [2023-11-29 04:15:21,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476439910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:21,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:21,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2023-11-29 04:15:21,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556085346] [2023-11-29 04:15:21,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:21,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:15:21,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:15:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:15:21,288 INFO L87 Difference]: Start difference. First operand 541 states and 683 transitions. Second operand has 20 states, 17 states have (on average 7.0) internal successors, (119), 20 states have internal predecessors, (119), 7 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (37), 6 states have call predecessors, (37), 7 states have call successors, (37) [2023-11-29 04:15:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:22,926 INFO L93 Difference]: Finished difference Result 684 states and 871 transitions. [2023-11-29 04:15:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:15:22,927 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 7.0) internal successors, (119), 20 states have internal predecessors, (119), 7 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (37), 6 states have call predecessors, (37), 7 states have call successors, (37) Word has length 222 [2023-11-29 04:15:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:22,929 INFO L225 Difference]: With dead ends: 684 [2023-11-29 04:15:22,929 INFO L226 Difference]: Without dead ends: 566 [2023-11-29 04:15:22,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 426 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:15:22,931 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 28 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:22,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2099 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 04:15:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-29 04:15:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 542. [2023-11-29 04:15:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 380 states have (on average 1.2105263157894737) internal successors, (460), 386 states have internal predecessors, (460), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (122), 96 states have call predecessors, (122), 101 states have call successors, (122) [2023-11-29 04:15:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 684 transitions. [2023-11-29 04:15:23,004 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 684 transitions. Word has length 222 [2023-11-29 04:15:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:23,004 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 684 transitions. [2023-11-29 04:15:23,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 7.0) internal successors, (119), 20 states have internal predecessors, (119), 7 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (37), 6 states have call predecessors, (37), 7 states have call successors, (37) [2023-11-29 04:15:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 684 transitions. [2023-11-29 04:15:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-11-29 04:15:23,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:23,007 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:15:23,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 04:15:23,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 04:15:23,208 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:23,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:23,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1884298517, now seen corresponding path program 2 times [2023-11-29 04:15:23,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:23,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355541735] [2023-11-29 04:15:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:23,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:23,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:23,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157227588] [2023-11-29 04:15:23,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:15:23,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:23,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:23,285 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:23,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:15:23,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:15:23,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:15:23,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 04:15:23,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 90 proven. 21 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-11-29 04:15:24,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-29 04:15:24,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:24,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355541735] [2023-11-29 04:15:24,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:24,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157227588] [2023-11-29 04:15:24,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157227588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:24,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:24,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-11-29 04:15:24,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614215022] [2023-11-29 04:15:24,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:24,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:15:24,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:15:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:15:24,489 INFO L87 Difference]: Start difference. First operand 542 states and 684 transitions. Second operand has 20 states, 18 states have (on average 6.444444444444445) internal successors, (116), 20 states have internal predecessors, (116), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-29 04:15:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:25,700 INFO L93 Difference]: Finished difference Result 686 states and 873 transitions. [2023-11-29 04:15:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:15:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 6.444444444444445) internal successors, (116), 20 states have internal predecessors, (116), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 223 [2023-11-29 04:15:25,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:25,703 INFO L225 Difference]: With dead ends: 686 [2023-11-29 04:15:25,703 INFO L226 Difference]: Without dead ends: 567 [2023-11-29 04:15:25,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 425 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:15:25,704 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 16 mSDsluCounter, 2284 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:25,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2478 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:15:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-11-29 04:15:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 543. [2023-11-29 04:15:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 381 states have (on average 1.20997375328084) internal successors, (461), 387 states have internal predecessors, (461), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (122), 96 states have call predecessors, (122), 101 states have call successors, (122) [2023-11-29 04:15:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 685 transitions. [2023-11-29 04:15:25,754 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 685 transitions. Word has length 223 [2023-11-29 04:15:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:25,755 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 685 transitions. [2023-11-29 04:15:25,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 6.444444444444445) internal successors, (116), 20 states have internal predecessors, (116), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-29 04:15:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 685 transitions. [2023-11-29 04:15:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-29 04:15:25,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:25,759 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:15:25,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:15:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 04:15:25,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:25,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1586619122, now seen corresponding path program 3 times [2023-11-29 04:15:25,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:25,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196369223] [2023-11-29 04:15:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:25,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:26,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:26,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330192524] [2023-11-29 04:15:26,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:15:26,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:26,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:26,032 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:26,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:15:27,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:15:27,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:15:27,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 04:15:27,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-11-29 04:15:27,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-29 04:15:27,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:27,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196369223] [2023-11-29 04:15:27,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:27,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330192524] [2023-11-29 04:15:27,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330192524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:27,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:27,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-29 04:15:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400426132] [2023-11-29 04:15:27,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:27,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:15:27,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:15:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:15:27,670 INFO L87 Difference]: Start difference. First operand 543 states and 685 transitions. Second operand has 19 states, 17 states have (on average 6.529411764705882) internal successors, (111), 19 states have internal predecessors, (111), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-29 04:15:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:28,740 INFO L93 Difference]: Finished difference Result 664 states and 842 transitions. [2023-11-29 04:15:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:15:28,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 6.529411764705882) internal successors, (111), 19 states have internal predecessors, (111), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 224 [2023-11-29 04:15:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:28,743 INFO L225 Difference]: With dead ends: 664 [2023-11-29 04:15:28,743 INFO L226 Difference]: Without dead ends: 544 [2023-11-29 04:15:28,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:15:28,744 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 11 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:28,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1979 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 04:15:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-11-29 04:15:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2023-11-29 04:15:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 382 states have (on average 1.2094240837696335) internal successors, (462), 388 states have internal predecessors, (462), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (122), 96 states have call predecessors, (122), 101 states have call successors, (122) [2023-11-29 04:15:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 686 transitions. [2023-11-29 04:15:28,792 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 686 transitions. Word has length 224 [2023-11-29 04:15:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:28,792 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 686 transitions. [2023-11-29 04:15:28,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 6.529411764705882) internal successors, (111), 19 states have internal predecessors, (111), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-29 04:15:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 686 transitions. [2023-11-29 04:15:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-29 04:15:28,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:28,795 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 5, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:15:28,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:15:28,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 04:15:28,995 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:28,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash 948492469, now seen corresponding path program 4 times [2023-11-29 04:15:28,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:28,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592497583] [2023-11-29 04:15:28,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:28,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:29,079 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:29,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219588916] [2023-11-29 04:15:29,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:15:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:29,081 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:29,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:15:29,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:15:29,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:15:29,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 2930 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 04:15:29,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 122 proven. 16 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-11-29 04:15:29,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-29 04:15:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:30,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592497583] [2023-11-29 04:15:30,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:30,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219588916] [2023-11-29 04:15:30,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219588916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:30,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:30,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 04:15:30,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652406179] [2023-11-29 04:15:30,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:15:30,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:15:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:15:30,162 INFO L87 Difference]: Start difference. First operand 544 states and 686 transitions. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2023-11-29 04:15:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:31,442 INFO L93 Difference]: Finished difference Result 1055 states and 1377 transitions. [2023-11-29 04:15:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:15:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 225 [2023-11-29 04:15:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:31,446 INFO L225 Difference]: With dead ends: 1055 [2023-11-29 04:15:31,446 INFO L226 Difference]: Without dead ends: 664 [2023-11-29 04:15:31,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 440 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 04:15:31,449 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 76 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:31,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1295 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 04:15:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2023-11-29 04:15:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 592. [2023-11-29 04:15:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 430 states have (on average 1.241860465116279) internal successors, (534), 436 states have internal predecessors, (534), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (122), 96 states have call predecessors, (122), 101 states have call successors, (122) [2023-11-29 04:15:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 758 transitions. [2023-11-29 04:15:31,541 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 758 transitions. Word has length 225 [2023-11-29 04:15:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:31,542 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 758 transitions. [2023-11-29 04:15:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 2 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2023-11-29 04:15:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 758 transitions. [2023-11-29 04:15:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 04:15:31,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:31,546 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 8, 8, 8, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:31,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 04:15:31,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 04:15:31,747 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:31,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:31,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1201332487, now seen corresponding path program 1 times [2023-11-29 04:15:31,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:31,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740937759] [2023-11-29 04:15:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:31,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:31,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:31,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589331204] [2023-11-29 04:15:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:31,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:31,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:31,830 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:31,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:15:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:32,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 3400 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 04:15:32,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 142 proven. 15 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-11-29 04:15:32,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2023-11-29 04:15:33,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:33,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740937759] [2023-11-29 04:15:33,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:33,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589331204] [2023-11-29 04:15:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589331204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:33,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:33,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-29 04:15:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143775160] [2023-11-29 04:15:33,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:33,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 04:15:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 04:15:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:15:33,134 INFO L87 Difference]: Start difference. First operand 592 states and 758 transitions. Second operand has 21 states, 19 states have (on average 7.947368421052632) internal successors, (151), 21 states have internal predecessors, (151), 6 states have call successors, (49), 2 states have call predecessors, (49), 5 states have return successors, (50), 6 states have call predecessors, (50), 6 states have call successors, (50) [2023-11-29 04:15:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:34,241 INFO L93 Difference]: Finished difference Result 726 states and 934 transitions. [2023-11-29 04:15:34,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:15:34,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 7.947368421052632) internal successors, (151), 21 states have internal predecessors, (151), 6 states have call successors, (49), 2 states have call predecessors, (49), 5 states have return successors, (50), 6 states have call predecessors, (50), 6 states have call successors, (50) Word has length 295 [2023-11-29 04:15:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:34,244 INFO L225 Difference]: With dead ends: 726 [2023-11-29 04:15:34,244 INFO L226 Difference]: Without dead ends: 593 [2023-11-29 04:15:34,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 568 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 04:15:34,246 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 11 mSDsluCounter, 1975 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:34,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2158 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 04:15:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-11-29 04:15:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2023-11-29 04:15:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 431 states have (on average 1.2412993039443156) internal successors, (535), 437 states have internal predecessors, (535), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (122), 96 states have call predecessors, (122), 101 states have call successors, (122) [2023-11-29 04:15:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 759 transitions. [2023-11-29 04:15:34,312 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 759 transitions. Word has length 295 [2023-11-29 04:15:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:34,313 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 759 transitions. [2023-11-29 04:15:34,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 7.947368421052632) internal successors, (151), 21 states have internal predecessors, (151), 6 states have call successors, (49), 2 states have call predecessors, (49), 5 states have return successors, (50), 6 states have call predecessors, (50), 6 states have call successors, (50) [2023-11-29 04:15:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 759 transitions. [2023-11-29 04:15:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-29 04:15:34,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:34,316 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 10, 8, 8, 8, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:34,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 04:15:34,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 04:15:34,517 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:34,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash -570912937, now seen corresponding path program 2 times [2023-11-29 04:15:34,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:34,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401533662] [2023-11-29 04:15:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:34,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:34,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:34,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185303641] [2023-11-29 04:15:34,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:15:34,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:34,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:34,603 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:34,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 04:15:35,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:15:35,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:15:35,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:15:35,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-11-29 04:15:35,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:15:35,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:35,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401533662] [2023-11-29 04:15:35,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:35,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185303641] [2023-11-29 04:15:35,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185303641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:15:35,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:15:35,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:15:35,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149678167] [2023-11-29 04:15:35,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:15:35,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:15:35,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:15:35,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:15:35,130 INFO L87 Difference]: Start difference. First operand 593 states and 759 transitions. Second operand has 6 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-29 04:15:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:35,525 INFO L93 Difference]: Finished difference Result 600 states and 765 transitions. [2023-11-29 04:15:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:15:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) Word has length 297 [2023-11-29 04:15:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:35,528 INFO L225 Difference]: With dead ends: 600 [2023-11-29 04:15:35,529 INFO L226 Difference]: Without dead ends: 593 [2023-11-29 04:15:35,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:15:35,529 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 5 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:35,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 930 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:15:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-11-29 04:15:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2023-11-29 04:15:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 431 states have (on average 1.2412993039443156) internal successors, (535), 437 states have internal predecessors, (535), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (121), 96 states have call predecessors, (121), 101 states have call successors, (121) [2023-11-29 04:15:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 758 transitions. [2023-11-29 04:15:35,586 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 758 transitions. Word has length 297 [2023-11-29 04:15:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:35,587 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 758 transitions. [2023-11-29 04:15:35,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-29 04:15:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 758 transitions. [2023-11-29 04:15:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-29 04:15:35,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:35,591 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 12, 8, 8, 8, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:35,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 04:15:35,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 04:15:35,793 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:35,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1809114042, now seen corresponding path program 1 times [2023-11-29 04:15:35,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:35,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744269403] [2023-11-29 04:15:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:35,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:35,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:35,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460142069] [2023-11-29 04:15:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:35,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:35,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:35,883 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:35,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 04:15:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:36,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 3466 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 04:15:36,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-11-29 04:15:36,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked. [2023-11-29 04:15:37,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744269403] [2023-11-29 04:15:37,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:37,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460142069] [2023-11-29 04:15:37,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460142069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:37,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:37,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-29 04:15:37,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203482403] [2023-11-29 04:15:37,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:15:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:15:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:15:37,300 INFO L87 Difference]: Start difference. First operand 593 states and 758 transitions. Second operand has 23 states, 21 states have (on average 7.0) internal successors, (147), 23 states have internal predecessors, (147), 6 states have call successors, (45), 2 states have call predecessors, (45), 5 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) [2023-11-29 04:15:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:38,926 INFO L93 Difference]: Finished difference Result 728 states and 934 transitions. [2023-11-29 04:15:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:15:38,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 7.0) internal successors, (147), 23 states have internal predecessors, (147), 6 states have call successors, (45), 2 states have call predecessors, (45), 5 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) Word has length 305 [2023-11-29 04:15:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:38,931 INFO L225 Difference]: With dead ends: 728 [2023-11-29 04:15:38,931 INFO L226 Difference]: Without dead ends: 594 [2023-11-29 04:15:38,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:15:38,932 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 17 mSDsluCounter, 1975 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:38,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 2158 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 04:15:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-11-29 04:15:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2023-11-29 04:15:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 432 states have (on average 1.2407407407407407) internal successors, (536), 438 states have internal predecessors, (536), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (121), 96 states have call predecessors, (121), 101 states have call successors, (121) [2023-11-29 04:15:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 759 transitions. [2023-11-29 04:15:39,021 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 759 transitions. Word has length 305 [2023-11-29 04:15:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:39,021 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 759 transitions. [2023-11-29 04:15:39,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 7.0) internal successors, (147), 23 states have internal predecessors, (147), 6 states have call successors, (45), 2 states have call predecessors, (45), 5 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) [2023-11-29 04:15:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 759 transitions. [2023-11-29 04:15:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-29 04:15:39,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:39,025 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 14, 8, 8, 8, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:39,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 04:15:39,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:39,227 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:39,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash -556381604, now seen corresponding path program 2 times [2023-11-29 04:15:39,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:39,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126776856] [2023-11-29 04:15:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:39,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:39,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:39,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089778288] [2023-11-29 04:15:39,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:15:39,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:39,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:39,326 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:39,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 04:15:40,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:15:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:15:40,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 3504 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 04:15:40,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 184 proven. 28 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2023-11-29 04:15:40,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2023-11-29 04:15:40,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:40,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126776856] [2023-11-29 04:15:40,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:40,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089778288] [2023-11-29 04:15:40,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089778288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:40,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:40,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-29 04:15:40,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642007822] [2023-11-29 04:15:40,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:40,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:15:40,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:15:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:15:40,855 INFO L87 Difference]: Start difference. First operand 594 states and 759 transitions. Second operand has 25 states, 23 states have (on average 6.478260869565218) internal successors, (149), 25 states have internal predecessors, (149), 6 states have call successors, (45), 2 states have call predecessors, (45), 5 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) [2023-11-29 04:15:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:42,065 INFO L93 Difference]: Finished difference Result 730 states and 936 transitions. [2023-11-29 04:15:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:15:42,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 6.478260869565218) internal successors, (149), 25 states have internal predecessors, (149), 6 states have call successors, (45), 2 states have call predecessors, (45), 5 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) Word has length 307 [2023-11-29 04:15:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:42,068 INFO L225 Difference]: With dead ends: 730 [2023-11-29 04:15:42,068 INFO L226 Difference]: Without dead ends: 595 [2023-11-29 04:15:42,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 588 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 04:15:42,069 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 12 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:42,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2335 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:15:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-11-29 04:15:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2023-11-29 04:15:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 433 states have (on average 1.2401847575057736) internal successors, (537), 439 states have internal predecessors, (537), 102 states have call successors, (102), 60 states have call predecessors, (102), 59 states have return successors, (121), 96 states have call predecessors, (121), 101 states have call successors, (121) [2023-11-29 04:15:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 760 transitions. [2023-11-29 04:15:42,123 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 760 transitions. Word has length 307 [2023-11-29 04:15:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:42,124 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 760 transitions. [2023-11-29 04:15:42,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 6.478260869565218) internal successors, (149), 25 states have internal predecessors, (149), 6 states have call successors, (45), 2 states have call predecessors, (45), 5 states have return successors, (46), 6 states have call predecessors, (46), 6 states have call successors, (46) [2023-11-29 04:15:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 760 transitions. [2023-11-29 04:15:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 04:15:42,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:42,127 INFO L195 NwaCegarLoop]: trace histogram [22, 20, 16, 8, 8, 8, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:42,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-29 04:15:42,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:42,328 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:42,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1210234170, now seen corresponding path program 3 times [2023-11-29 04:15:42,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:42,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468306940] [2023-11-29 04:15:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:42,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:42,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:42,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549507493] [2023-11-29 04:15:42,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:15:42,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:42,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:42,408 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:42,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 04:15:50,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 04:15:50,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:15:50,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 04:15:50,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 316 proven. 40 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-11-29 04:15:50,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:50,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:15:50,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 68 [2023-11-29 04:15:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 59 proven. 270 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2023-11-29 04:15:51,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468306940] [2023-11-29 04:15:51,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549507493] [2023-11-29 04:15:51,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549507493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:51,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:51,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2023-11-29 04:15:51,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876085516] [2023-11-29 04:15:51,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:51,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:15:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:51,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:15:51,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:15:51,227 INFO L87 Difference]: Start difference. First operand 595 states and 760 transitions. Second operand has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (43), 4 states have call predecessors, (43), 5 states have return successors, (41), 6 states have call predecessors, (41), 9 states have call successors, (41) [2023-11-29 04:15:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:53,903 INFO L93 Difference]: Finished difference Result 697 states and 909 transitions. [2023-11-29 04:15:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:15:53,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (43), 4 states have call predecessors, (43), 5 states have return successors, (41), 6 states have call predecessors, (41), 9 states have call successors, (41) Word has length 309 [2023-11-29 04:15:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:53,907 INFO L225 Difference]: With dead ends: 697 [2023-11-29 04:15:53,907 INFO L226 Difference]: Without dead ends: 653 [2023-11-29 04:15:53,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 596 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:15:53,908 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 208 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:53,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 763 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 04:15:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-11-29 04:15:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2023-11-29 04:15:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 469 states have (on average 1.2388059701492538) internal successors, (581), 479 states have internal predecessors, (581), 119 states have call successors, (119), 60 states have call predecessors, (119), 64 states have return successors, (152), 114 states have call predecessors, (152), 118 states have call successors, (152) [2023-11-29 04:15:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 852 transitions. [2023-11-29 04:15:54,012 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 852 transitions. Word has length 309 [2023-11-29 04:15:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:54,013 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 852 transitions. [2023-11-29 04:15:54,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (43), 4 states have call predecessors, (43), 5 states have return successors, (41), 6 states have call predecessors, (41), 9 states have call successors, (41) [2023-11-29 04:15:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 852 transitions. [2023-11-29 04:15:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-11-29 04:15:54,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:54,017 INFO L195 NwaCegarLoop]: trace histogram [16, 13, 10, 8, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 04:15:54,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 04:15:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:54,218 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:54,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1101329133, now seen corresponding path program 1 times [2023-11-29 04:15:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:54,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122115539] [2023-11-29 04:15:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:54,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:54,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:54,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987289485] [2023-11-29 04:15:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:54,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:54,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:54,321 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:54,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 04:15:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:55,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 3648 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 04:15:55,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 235 proven. 36 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-11-29 04:15:55,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:15:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-29 04:15:55,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:55,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122115539] [2023-11-29 04:15:55,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:15:55,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987289485] [2023-11-29 04:15:55,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987289485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:15:55,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:15:55,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-11-29 04:15:55,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221895712] [2023-11-29 04:15:55,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:15:55,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:15:55,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:15:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:15:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:15:55,882 INFO L87 Difference]: Start difference. First operand 653 states and 852 transitions. Second operand has 27 states, 25 states have (on average 6.52) internal successors, (163), 27 states have internal predecessors, (163), 6 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) [2023-11-29 04:15:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:15:58,566 INFO L93 Difference]: Finished difference Result 809 states and 1070 transitions. [2023-11-29 04:15:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:15:58,566 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 6.52) internal successors, (163), 27 states have internal predecessors, (163), 6 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) Word has length 308 [2023-11-29 04:15:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:15:58,570 INFO L225 Difference]: With dead ends: 809 [2023-11-29 04:15:58,570 INFO L226 Difference]: Without dead ends: 654 [2023-11-29 04:15:58,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 588 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:15:58,571 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 12 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:15:58,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2691 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 04:15:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2023-11-29 04:15:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2023-11-29 04:15:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 470 states have (on average 1.2382978723404254) internal successors, (582), 480 states have internal predecessors, (582), 119 states have call successors, (119), 60 states have call predecessors, (119), 64 states have return successors, (152), 114 states have call predecessors, (152), 118 states have call successors, (152) [2023-11-29 04:15:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 853 transitions. [2023-11-29 04:15:58,664 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 853 transitions. Word has length 308 [2023-11-29 04:15:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:15:58,664 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 853 transitions. [2023-11-29 04:15:58,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 6.52) internal successors, (163), 27 states have internal predecessors, (163), 6 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) [2023-11-29 04:15:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 853 transitions. [2023-11-29 04:15:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-11-29 04:15:58,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:15:58,668 INFO L195 NwaCegarLoop]: trace histogram [18, 14, 11, 8, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 04:15:58,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 04:15:58,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:58,868 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:15:58,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:15:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1838683239, now seen corresponding path program 2 times [2023-11-29 04:15:58,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:15:58,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331501859] [2023-11-29 04:15:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:15:58,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:15:58,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:15:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280088701] [2023-11-29 04:15:58,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:15:58,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:58,965 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:58,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 04:16:00,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:16:00,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:16:00,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 3693 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 04:16:00,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:16:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 279 proven. 45 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2023-11-29 04:16:00,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:16:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2023-11-29 04:16:01,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:16:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331501859] [2023-11-29 04:16:01,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:16:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280088701] [2023-11-29 04:16:01,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280088701] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:16:01,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:16:01,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-11-29 04:16:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002527385] [2023-11-29 04:16:01,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:16:01,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:16:01,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:16:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:16:01,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:16:01,228 INFO L87 Difference]: Start difference. First operand 654 states and 853 transitions. Second operand has 29 states, 27 states have (on average 6.111111111111111) internal successors, (165), 29 states have internal predecessors, (165), 6 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) [2023-11-29 04:16:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:16:02,876 INFO L93 Difference]: Finished difference Result 811 states and 1072 transitions. [2023-11-29 04:16:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 04:16:02,877 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 6.111111111111111) internal successors, (165), 29 states have internal predecessors, (165), 6 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) Word has length 312 [2023-11-29 04:16:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:16:02,881 INFO L225 Difference]: With dead ends: 811 [2023-11-29 04:16:02,881 INFO L226 Difference]: Without dead ends: 655 [2023-11-29 04:16:02,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 594 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-11-29 04:16:02,883 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 11 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:16:02,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2874 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 04:16:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-11-29 04:16:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2023-11-29 04:16:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 471 states have (on average 1.237791932059448) internal successors, (583), 481 states have internal predecessors, (583), 119 states have call successors, (119), 60 states have call predecessors, (119), 64 states have return successors, (152), 114 states have call predecessors, (152), 118 states have call successors, (152) [2023-11-29 04:16:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 854 transitions. [2023-11-29 04:16:02,964 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 854 transitions. Word has length 312 [2023-11-29 04:16:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:16:02,965 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 854 transitions. [2023-11-29 04:16:02,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 6.111111111111111) internal successors, (165), 29 states have internal predecessors, (165), 6 states have call successors, (48), 2 states have call predecessors, (48), 5 states have return successors, (49), 6 states have call predecessors, (49), 6 states have call successors, (49) [2023-11-29 04:16:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 854 transitions. [2023-11-29 04:16:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-11-29 04:16:02,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:16:02,968 INFO L195 NwaCegarLoop]: trace histogram [20, 13, 10, 8, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 04:16:02,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 04:16:03,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 04:16:03,168 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:16:03,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:16:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash -318761363, now seen corresponding path program 3 times [2023-11-29 04:16:03,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:16:03,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652091151] [2023-11-29 04:16:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:16:03,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:16:03,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:16:03,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334055316] [2023-11-29 04:16:03,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:16:03,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:16:03,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:16:03,301 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:16:03,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 04:16:54,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 04:16:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:16:54,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 3097 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 04:16:54,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:16:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 205 proven. 55 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2023-11-29 04:16:54,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:16:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 133 proven. 55 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-11-29 04:16:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:16:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652091151] [2023-11-29 04:16:55,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:16:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334055316] [2023-11-29 04:16:55,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334055316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:16:55,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:16:55,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-11-29 04:16:55,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070712908] [2023-11-29 04:16:55,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:16:55,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 04:16:55,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:16:55,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 04:16:55,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-11-29 04:16:55,488 INFO L87 Difference]: Start difference. First operand 655 states and 854 transitions. Second operand has 31 states, 29 states have (on average 4.689655172413793) internal successors, (136), 31 states have internal predecessors, (136), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (39), 6 states have call predecessors, (39), 6 states have call successors, (39) [2023-11-29 04:16:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:16:57,837 INFO L93 Difference]: Finished difference Result 813 states and 1074 transitions. [2023-11-29 04:16:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:16:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.689655172413793) internal successors, (136), 31 states have internal predecessors, (136), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (39), 6 states have call predecessors, (39), 6 states have call successors, (39) Word has length 312 [2023-11-29 04:16:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:16:57,841 INFO L225 Difference]: With dead ends: 813 [2023-11-29 04:16:57,841 INFO L226 Difference]: Without dead ends: 656 [2023-11-29 04:16:57,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 04:16:57,843 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 16 mSDsluCounter, 2689 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2872 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:16:57,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2872 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 04:16:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2023-11-29 04:16:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 656. [2023-11-29 04:16:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 472 states have (on average 1.2372881355932204) internal successors, (584), 482 states have internal predecessors, (584), 119 states have call successors, (119), 60 states have call predecessors, (119), 64 states have return successors, (152), 114 states have call predecessors, (152), 118 states have call successors, (152) [2023-11-29 04:16:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 855 transitions. [2023-11-29 04:16:57,907 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 855 transitions. Word has length 312 [2023-11-29 04:16:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:16:57,907 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 855 transitions. [2023-11-29 04:16:57,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.689655172413793) internal successors, (136), 31 states have internal predecessors, (136), 6 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (39), 6 states have call predecessors, (39), 6 states have call successors, (39) [2023-11-29 04:16:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 855 transitions. [2023-11-29 04:16:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-29 04:16:57,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:16:57,912 INFO L195 NwaCegarLoop]: trace histogram [22, 13, 10, 8, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 04:16:57,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 04:16:58,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 04:16:58,113 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:16:58,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:16:58,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1092314675, now seen corresponding path program 4 times [2023-11-29 04:16:58,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:16:58,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646119712] [2023-11-29 04:16:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:16:58,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:16:58,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:16:58,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253153572] [2023-11-29 04:16:58,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:16:58,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:16:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:16:58,227 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:16:58,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 04:16:59,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:16:59,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:16:59,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 3762 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 04:16:59,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:16:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 220 proven. 166 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2023-11-29 04:16:59,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:17:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-29 04:17:00,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:17:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646119712] [2023-11-29 04:17:00,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:17:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253153572] [2023-11-29 04:17:00,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253153572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:17:00,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:17:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14] total 41 [2023-11-29 04:17:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054066797] [2023-11-29 04:17:00,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:17:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 04:17:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:17:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 04:17:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 04:17:00,410 INFO L87 Difference]: Start difference. First operand 656 states and 855 transitions. Second operand has 41 states, 40 states have (on average 3.95) internal successors, (158), 41 states have internal predecessors, (158), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2023-11-29 04:17:20,807 WARN L293 SmtUtils]: Spent 18.36s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:17:33,509 WARN L293 SmtUtils]: Spent 12.13s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:17:40,483 WARN L293 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 04:17:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:17:51,939 INFO L93 Difference]: Finished difference Result 1415 states and 1912 transitions. [2023-11-29 04:17:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 04:17:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.95) internal successors, (158), 41 states have internal predecessors, (158), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 314 [2023-11-29 04:17:51,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:17:51,943 INFO L225 Difference]: With dead ends: 1415 [2023-11-29 04:17:51,943 INFO L226 Difference]: Without dead ends: 912 [2023-11-29 04:17:51,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=594, Invalid=3566, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 04:17:51,947 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 323 mSDsluCounter, 3836 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 4032 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:17:51,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 4032 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 04:17:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-11-29 04:17:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 752. [2023-11-29 04:17:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 568 states have (on average 1.2816901408450705) internal successors, (728), 578 states have internal predecessors, (728), 119 states have call successors, (119), 60 states have call predecessors, (119), 64 states have return successors, (152), 114 states have call predecessors, (152), 118 states have call successors, (152) [2023-11-29 04:17:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 999 transitions. [2023-11-29 04:17:52,045 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 999 transitions. Word has length 314 [2023-11-29 04:17:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:17:52,046 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 999 transitions. [2023-11-29 04:17:52,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.95) internal successors, (158), 41 states have internal predecessors, (158), 4 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2023-11-29 04:17:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 999 transitions. [2023-11-29 04:17:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-11-29 04:17:52,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:17:52,049 INFO L195 NwaCegarLoop]: trace histogram [26, 23, 22, 8, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 04:17:52,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 04:17:52,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:52,250 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:17:52,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:17:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash -70548265, now seen corresponding path program 5 times [2023-11-29 04:17:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:17:52,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095645370] [2023-11-29 04:17:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:17:52,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:17:52,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:17:52,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293985072] [2023-11-29 04:17:52,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:17:52,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:17:52,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:17:52,366 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:17:52,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a865013c-abf4-4961-b4ce-803af3f92c7f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process