./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ --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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:28:31,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:28:31,503 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 22:28:31,520 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:28:31,522 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:28:31,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:28:31,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:28:31,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:28:31,569 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:28:31,570 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:28:31,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:28:31,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:28:31,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:28:31,594 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:28:31,595 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:28:31,595 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:28:31,597 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:28:31,597 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:28:31,598 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:28:31,598 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:28:31,599 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:28:31,599 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:28:31,600 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:28:31,600 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:28:31,601 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:28:31,601 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:28:31,602 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:28:31,602 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:28:31,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:28:31,603 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:28:31,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:28:31,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:28:31,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:28:31,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:28:31,606 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:28:31,606 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:28:31,606 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:28:31,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:28:31,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:28:31,607 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_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2023-11-23 22:28:31,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:28:31,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:28:31,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:28:31,894 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:28:31,894 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:28:31,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2023-11-23 22:28:34,932 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:28:35,474 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:28:35,475 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2023-11-23 22:28:35,516 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/data/b1f9cbd7a/6bbf007deac346599f8904f97effcd2b/FLAG51efdacb1 [2023-11-23 22:28:35,529 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/data/b1f9cbd7a/6bbf007deac346599f8904f97effcd2b [2023-11-23 22:28:35,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:28:35,533 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:28:35,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:28:35,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:28:35,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:28:35,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:35" (1/1) ... [2023-11-23 22:28:35,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@378c640c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:35, skipping insertion in model container [2023-11-23 22:28:35,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:35" (1/1) ... [2023-11-23 22:28:35,662 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:28:35,956 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_e7476562-b586-4646-b417-3afc27a25b21/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2023-11-23 22:28:35,967 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_e7476562-b586-4646-b417-3afc27a25b21/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2023-11-23 22:28:37,162 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,163 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,164 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,165 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,166 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,182 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,183 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,185 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,186 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,189 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,190 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,191 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,191 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:37,643 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 22:28:37,645 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 22:28:37,646 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 22:28:37,648 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 22:28:37,650 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 22:28:37,651 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 22:28:37,652 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 22:28:37,653 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 22:28:37,654 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 22:28:37,655 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 22:28:37,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:28:37,900 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:28:37,912 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_e7476562-b586-4646-b417-3afc27a25b21/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2023-11-23 22:28:37,913 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_e7476562-b586-4646-b417-3afc27a25b21/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2023-11-23 22:28:38,043 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,054 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,054 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,055 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,056 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,076 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,077 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,078 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,078 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,079 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,080 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,081 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,081 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 22:28:38,154 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 22:28:38,155 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 22:28:38,156 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 22:28:38,156 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 22:28:38,157 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 22:28:38,158 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 22:28:38,158 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 22:28:38,159 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 22:28:38,159 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 22:28:38,160 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 22:28:38,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:28:38,416 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,416 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,416 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,416 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,417 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,417 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,417 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,417 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,417 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,418 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,418 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,418 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,418 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,419 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,419 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,419 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:38,426 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:28:38,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38 WrapperNode [2023-11-23 22:28:38,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:28:38,428 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:28:38,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:28:38,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:28:38,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,549 INFO L138 Inliner]: procedures = 678, calls = 1036, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 91 [2023-11-23 22:28:38,550 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:28:38,551 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:28:38,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:28:38,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:28:38,563 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,568 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,590 INFO L189 HeapSplitter]: Split 20 memory accesses to 3 slices as follows [2, 13, 5] [2023-11-23 22:28:38,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,591 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,607 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,611 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,619 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,625 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:28:38,626 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:28:38,626 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:28:38,627 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:28:38,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (1/1) ... [2023-11-23 22:28:38,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:28:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:38,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:28:38,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:28:38,719 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2023-11-23 22:28:38,719 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2023-11-23 22:28:38,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:28:38,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 22:28:38,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 22:28:38,720 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-23 22:28:38,720 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-23 22:28:38,720 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-11-23 22:28:38,720 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-11-23 22:28:38,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:28:38,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 22:28:38,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 22:28:38,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 22:28:38,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:28:38,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:28:38,722 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2023-11-23 22:28:38,722 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2023-11-23 22:28:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 22:28:38,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 22:28:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:28:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 22:28:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 22:28:38,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 22:28:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 22:28:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 22:28:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 22:28:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:28:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:28:38,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:28:38,978 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:28:38,980 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:28:39,218 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:28:39,258 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:28:39,258 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:28:39,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:39 BoogieIcfgContainer [2023-11-23 22:28:39,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:28:39,262 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:28:39,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:28:39,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:28:39,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:28:35" (1/3) ... [2023-11-23 22:28:39,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ef4179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:39, skipping insertion in model container [2023-11-23 22:28:39,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:38" (2/3) ... [2023-11-23 22:28:39,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ef4179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:39, skipping insertion in model container [2023-11-23 22:28:39,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:39" (3/3) ... [2023-11-23 22:28:39,268 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2023-11-23 22:28:39,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:28:39,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:28:39,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:28:39,343 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;@4454827d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:28:39,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:28:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 37 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 22:28:39,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:28:39,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:39,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:39,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:39,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 432604891, now seen corresponding path program 1 times [2023-11-23 22:28:39,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885174890] [2023-11-23 22:28:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:39,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:39,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:39,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:39,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885174890] [2023-11-23 22:28:39,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885174890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:39,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:39,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:28:39,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811725650] [2023-11-23 22:28:39,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:39,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:28:39,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:39,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:28:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:28:39,903 INFO L87 Difference]: Start difference. First operand has 54 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 37 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:39,948 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2023-11-23 22:28:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:28:39,950 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 22:28:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:39,958 INFO L225 Difference]: With dead ends: 104 [2023-11-23 22:28:39,959 INFO L226 Difference]: Without dead ends: 52 [2023-11-23 22:28:39,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:28:39,966 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:39,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:28:39,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-23 22:28:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-23 22:28:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 22:28:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2023-11-23 22:28:40,010 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 25 [2023-11-23 22:28:40,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:40,010 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2023-11-23 22:28:40,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:40,011 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2023-11-23 22:28:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:28:40,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:40,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:40,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:28:40,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:40,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash -385043559, now seen corresponding path program 1 times [2023-11-23 22:28:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:40,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815947244] [2023-11-23 22:28:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:40,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:41,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:41,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:41,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815947244] [2023-11-23 22:28:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815947244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:41,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:41,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 22:28:41,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868212045] [2023-11-23 22:28:41,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:41,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:28:41,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:28:41,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:28:41,341 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:41,723 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2023-11-23 22:28:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:28:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 22:28:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:41,727 INFO L225 Difference]: With dead ends: 101 [2023-11-23 22:28:41,727 INFO L226 Difference]: Without dead ends: 55 [2023-11-23 22:28:41,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:28:41,730 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:41,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 297 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:28:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-23 22:28:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-23 22:28:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 39 states have internal predecessors, (50), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-23 22:28:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2023-11-23 22:28:41,761 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2023-11-23 22:28:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:41,761 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2023-11-23 22:28:41,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2023-11-23 22:28:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:28:41,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:41,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:41,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:28:41,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:41,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1194390185, now seen corresponding path program 1 times [2023-11-23 22:28:41,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:41,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770270691] [2023-11-23 22:28:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:41,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:42,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:42,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:42,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:42,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770270691] [2023-11-23 22:28:42,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770270691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:42,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:42,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:28:42,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680020078] [2023-11-23 22:28:42,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:42,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:28:42,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:28:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:28:42,628 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:42,972 INFO L93 Difference]: Finished difference Result 136 states and 184 transitions. [2023-11-23 22:28:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:28:42,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 22:28:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:42,974 INFO L225 Difference]: With dead ends: 136 [2023-11-23 22:28:42,975 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 22:28:42,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:28:42,977 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 97 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:42,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 401 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:28:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 22:28:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2023-11-23 22:28:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.42) internal successors, (71), 52 states have internal predecessors, (71), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2023-11-23 22:28:42,992 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 25 [2023-11-23 22:28:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:42,993 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2023-11-23 22:28:42,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2023-11-23 22:28:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:28:42,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:42,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:42,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:28:42,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:42,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1587417195, now seen corresponding path program 1 times [2023-11-23 22:28:42,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:42,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83325699] [2023-11-23 22:28:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:42,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:43,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:43,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:43,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83325699] [2023-11-23 22:28:43,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83325699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:43,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:43,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 22:28:43,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650841161] [2023-11-23 22:28:43,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:43,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:28:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:28:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:28:43,749 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:44,084 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2023-11-23 22:28:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:28:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 22:28:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:44,093 INFO L225 Difference]: With dead ends: 158 [2023-11-23 22:28:44,093 INFO L226 Difference]: Without dead ends: 95 [2023-11-23 22:28:44,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:28:44,099 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 67 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:44,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 349 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:28:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-23 22:28:44,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-11-23 22:28:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 58 states have internal predecessors, (80), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2023-11-23 22:28:44,120 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 25 [2023-11-23 22:28:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:44,121 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2023-11-23 22:28:44,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2023-11-23 22:28:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:28:44,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:44,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:44,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:28:44,124 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:44,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:44,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1329251757, now seen corresponding path program 1 times [2023-11-23 22:28:44,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:44,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159213849] [2023-11-23 22:28:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:44,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:44,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:44,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:44,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159213849] [2023-11-23 22:28:44,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159213849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:44,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:44,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 22:28:44,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629928899] [2023-11-23 22:28:44,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:44,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:28:44,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:28:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:28:44,627 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:44,935 INFO L93 Difference]: Finished difference Result 173 states and 244 transitions. [2023-11-23 22:28:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:28:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 22:28:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:44,937 INFO L225 Difference]: With dead ends: 173 [2023-11-23 22:28:44,938 INFO L226 Difference]: Without dead ends: 104 [2023-11-23 22:28:44,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:28:44,939 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 48 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:44,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 410 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:28:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-23 22:28:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2023-11-23 22:28:44,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 58 states have internal predecessors, (80), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2023-11-23 22:28:44,954 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 25 [2023-11-23 22:28:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:44,955 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2023-11-23 22:28:44,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:28:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2023-11-23 22:28:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:28:44,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:44,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:28:44,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:44,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2089459861, now seen corresponding path program 1 times [2023-11-23 22:28:44,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:44,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293326144] [2023-11-23 22:28:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:44,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:45,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:45,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293326144] [2023-11-23 22:28:45,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293326144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:45,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:45,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:28:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410680281] [2023-11-23 22:28:45,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:45,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:28:45,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:28:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:28:45,056 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:45,102 INFO L93 Difference]: Finished difference Result 146 states and 203 transitions. [2023-11-23 22:28:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:28:45,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-23 22:28:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:45,104 INFO L225 Difference]: With dead ends: 146 [2023-11-23 22:28:45,105 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 22:28:45,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:28:45,106 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 14 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:45,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 193 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:28:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 22:28:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2023-11-23 22:28:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 56 states have internal predecessors, (76), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2023-11-23 22:28:45,133 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 25 [2023-11-23 22:28:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:45,134 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2023-11-23 22:28:45,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2023-11-23 22:28:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:28:45,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:45,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:45,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:28:45,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:45,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1947341997, now seen corresponding path program 1 times [2023-11-23 22:28:45,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:45,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119190536] [2023-11-23 22:28:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:45,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:45,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119190536] [2023-11-23 22:28:45,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119190536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:45,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:45,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:28:45,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900375222] [2023-11-23 22:28:45,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:45,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:28:45,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:28:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:28:45,262 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:45,310 INFO L93 Difference]: Finished difference Result 145 states and 200 transitions. [2023-11-23 22:28:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:28:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-23 22:28:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:45,313 INFO L225 Difference]: With dead ends: 145 [2023-11-23 22:28:45,313 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 22:28:45,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:28:45,315 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 8 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:45,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 184 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:28:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 22:28:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2023-11-23 22:28:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 56 states have internal predecessors, (74), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2023-11-23 22:28:45,336 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 25 [2023-11-23 22:28:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:45,337 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2023-11-23 22:28:45,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2023-11-23 22:28:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:28:45,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:45,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:45,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:28:45,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:45,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:45,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1954598289, now seen corresponding path program 1 times [2023-11-23 22:28:45,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:45,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694169708] [2023-11-23 22:28:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:45,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:45,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:45,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694169708] [2023-11-23 22:28:45,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694169708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:45,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:45,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:28:45,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190404538] [2023-11-23 22:28:45,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:45,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:28:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:28:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:28:45,580 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:45,680 INFO L93 Difference]: Finished difference Result 152 states and 203 transitions. [2023-11-23 22:28:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:28:45,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-23 22:28:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:45,683 INFO L225 Difference]: With dead ends: 152 [2023-11-23 22:28:45,683 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 22:28:45,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:28:45,685 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 18 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:45,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 397 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:28:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 22:28:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-23 22:28:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 49 states have internal predecessors, (64), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2023-11-23 22:28:45,701 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 25 [2023-11-23 22:28:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:45,702 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-23 22:28:45,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2023-11-23 22:28:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 22:28:45,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:45,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:45,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:28:45,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:45,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash 133984565, now seen corresponding path program 1 times [2023-11-23 22:28:45,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:45,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497504059] [2023-11-23 22:28:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:45,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:45,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497504059] [2023-11-23 22:28:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497504059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:45,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:45,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 22:28:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224262419] [2023-11-23 22:28:45,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:45,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:28:45,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:28:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:28:45,924 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:46,108 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2023-11-23 22:28:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:28:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-23 22:28:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:46,110 INFO L225 Difference]: With dead ends: 132 [2023-11-23 22:28:46,110 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 22:28:46,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:28:46,111 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 32 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:46,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 291 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:28:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 22:28:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-23 22:28:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2023-11-23 22:28:46,122 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 27 [2023-11-23 22:28:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:46,123 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2023-11-23 22:28:46,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2023-11-23 22:28:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 22:28:46,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:46,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:46,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:28:46,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:46,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:46,125 INFO L85 PathProgramCache]: Analyzing trace with hash 652102594, now seen corresponding path program 1 times [2023-11-23 22:28:46,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:46,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969232780] [2023-11-23 22:28:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:46,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:46,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:46,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969232780] [2023-11-23 22:28:46,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969232780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:46,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:46,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:28:46,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338561079] [2023-11-23 22:28:46,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:46,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:28:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:28:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:28:46,314 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:46,424 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2023-11-23 22:28:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:28:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-11-23 22:28:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:46,426 INFO L225 Difference]: With dead ends: 132 [2023-11-23 22:28:46,426 INFO L226 Difference]: Without dead ends: 72 [2023-11-23 22:28:46,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:28:46,427 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:46,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 245 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:28:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-23 22:28:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2023-11-23 22:28:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 51 states have internal predecessors, (64), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2023-11-23 22:28:46,442 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 29 [2023-11-23 22:28:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:46,442 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2023-11-23 22:28:46,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2023-11-23 22:28:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 22:28:46,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:46,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:46,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:28:46,444 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:46,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:46,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1663723829, now seen corresponding path program 1 times [2023-11-23 22:28:46,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:46,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956596446] [2023-11-23 22:28:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:46,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:46,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:46,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:46,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956596446] [2023-11-23 22:28:46,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956596446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:46,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:46,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:28:46,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722465267] [2023-11-23 22:28:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:46,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:28:46,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:28:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:28:46,634 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:46,722 INFO L93 Difference]: Finished difference Result 138 states and 181 transitions. [2023-11-23 22:28:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:28:46,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-23 22:28:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:46,725 INFO L225 Difference]: With dead ends: 138 [2023-11-23 22:28:46,725 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 22:28:46,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:28:46,726 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:46,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 251 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:28:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 22:28:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2023-11-23 22:28:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 53 states have internal predecessors, (66), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 22:28:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-11-23 22:28:46,742 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 30 [2023-11-23 22:28:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:46,742 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-11-23 22:28:46,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:28:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-11-23 22:28:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 22:28:46,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:46,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:46,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:28:46,744 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:46,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:46,745 INFO L85 PathProgramCache]: Analyzing trace with hash 853391152, now seen corresponding path program 1 times [2023-11-23 22:28:46,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:46,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128467914] [2023-11-23 22:28:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:47,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:48,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:28:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:48,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:48,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128467914] [2023-11-23 22:28:48,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128467914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:48,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:48,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 22:28:48,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390123365] [2023-11-23 22:28:48,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:48,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:28:48,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:28:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:28:48,680 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:28:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:49,354 INFO L93 Difference]: Finished difference Result 150 states and 194 transitions. [2023-11-23 22:28:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:28:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2023-11-23 22:28:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:49,357 INFO L225 Difference]: With dead ends: 150 [2023-11-23 22:28:49,357 INFO L226 Difference]: Without dead ends: 86 [2023-11-23 22:28:49,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-11-23 22:28:49,359 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:49,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 424 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:28:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-23 22:28:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2023-11-23 22:28:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 56 states have internal predecessors, (69), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-23 22:28:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2023-11-23 22:28:49,374 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 37 [2023-11-23 22:28:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:49,375 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2023-11-23 22:28:49,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:28:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2023-11-23 22:28:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 22:28:49,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:49,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:49,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 22:28:49,376 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:49,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1554455730, now seen corresponding path program 1 times [2023-11-23 22:28:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:49,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111840947] [2023-11-23 22:28:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:49,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:49,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:49,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:49,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:28:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:50,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:50,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111840947] [2023-11-23 22:28:50,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111840947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:50,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:50,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 22:28:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387829033] [2023-11-23 22:28:50,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:50,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:28:50,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:28:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:28:50,100 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:28:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:50,597 INFO L93 Difference]: Finished difference Result 172 states and 237 transitions. [2023-11-23 22:28:50,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 22:28:50,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2023-11-23 22:28:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:50,599 INFO L225 Difference]: With dead ends: 172 [2023-11-23 22:28:50,600 INFO L226 Difference]: Without dead ends: 104 [2023-11-23 22:28:50,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:28:50,601 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 60 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:50,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 425 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:28:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-23 22:28:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2023-11-23 22:28:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 60 states have internal predecessors, (73), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2023-11-23 22:28:50,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2023-11-23 22:28:50,616 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 37 [2023-11-23 22:28:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:50,616 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2023-11-23 22:28:50,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 22:28:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2023-11-23 22:28:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 22:28:50,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:50,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:50,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:28:50,618 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:50,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 967649716, now seen corresponding path program 1 times [2023-11-23 22:28:50,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:50,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49383651] [2023-11-23 22:28:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:50,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:50,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:50,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:50,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:28:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:50,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49383651] [2023-11-23 22:28:50,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49383651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:50,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:50,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:28:50,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009035078] [2023-11-23 22:28:50,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:50,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:28:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:50,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:28:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:28:50,928 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:28:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:51,218 INFO L93 Difference]: Finished difference Result 172 states and 243 transitions. [2023-11-23 22:28:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:28:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-11-23 22:28:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:51,220 INFO L225 Difference]: With dead ends: 172 [2023-11-23 22:28:51,221 INFO L226 Difference]: Without dead ends: 83 [2023-11-23 22:28:51,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:28:51,222 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 46 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:51,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 461 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:28:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-23 22:28:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2023-11-23 22:28:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 61 states have internal predecessors, (73), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2023-11-23 22:28:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2023-11-23 22:28:51,238 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 37 [2023-11-23 22:28:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:51,238 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2023-11-23 22:28:51,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 22:28:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2023-11-23 22:28:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 22:28:51,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:51,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:51,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 22:28:51,240 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:51,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash 512098045, now seen corresponding path program 1 times [2023-11-23 22:28:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937305507] [2023-11-23 22:28:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:51,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:51,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:51,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:28:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:51,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937305507] [2023-11-23 22:28:51,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937305507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:51,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372901387] [2023-11-23 22:28:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:51,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:51,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:51,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:28:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:52,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 22:28:52,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:52,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:28:52,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2023-11-23 22:28:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:53,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:53,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372901387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:53,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:53,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2023-11-23 22:28:53,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586068770] [2023-11-23 22:28:53,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:53,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-23 22:28:53,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-23 22:28:53,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-11-23 22:28:53,777 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 30 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 22:28:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:54,928 INFO L93 Difference]: Finished difference Result 178 states and 241 transitions. [2023-11-23 22:28:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:28:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Word has length 39 [2023-11-23 22:28:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:54,930 INFO L225 Difference]: With dead ends: 178 [2023-11-23 22:28:54,930 INFO L226 Difference]: Without dead ends: 105 [2023-11-23 22:28:54,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 22:28:54,932 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 171 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:54,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 584 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:28:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-23 22:28:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2023-11-23 22:28:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.3) internal successors, (78), 65 states have internal predecessors, (78), 13 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2023-11-23 22:28:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2023-11-23 22:28:54,957 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 39 [2023-11-23 22:28:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:54,958 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2023-11-23 22:28:54,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 22:28:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2023-11-23 22:28:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 22:28:54,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:54,959 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 22:28:54,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:28:55,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:55,174 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:55,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:55,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1618550106, now seen corresponding path program 1 times [2023-11-23 22:28:55,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:55,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716601733] [2023-11-23 22:28:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:55,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:55,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:55,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:55,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:28:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:28:55,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:55,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716601733] [2023-11-23 22:28:55,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716601733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:55,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:55,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 22:28:55,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018904668] [2023-11-23 22:28:55,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:28:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:28:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:28:55,409 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:28:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:28:55,496 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2023-11-23 22:28:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:28:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-11-23 22:28:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:28:55,497 INFO L225 Difference]: With dead ends: 100 [2023-11-23 22:28:55,498 INFO L226 Difference]: Without dead ends: 98 [2023-11-23 22:28:55,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:28:55,499 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 8 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:28:55,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 397 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:28:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-23 22:28:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2023-11-23 22:28:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 72 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (22), 12 states have call predecessors, (22), 13 states have call successors, (22) [2023-11-23 22:28:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2023-11-23 22:28:55,518 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 40 [2023-11-23 22:28:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:28:55,518 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2023-11-23 22:28:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:28:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2023-11-23 22:28:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 22:28:55,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:28:55,520 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 22:28:55,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 22:28:55,520 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:28:55,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:55,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1729626261, now seen corresponding path program 1 times [2023-11-23 22:28:55,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:55,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069135778] [2023-11-23 22:28:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:55,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:56,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:28:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:56,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:28:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:28:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:56,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-23 22:28:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:28:56,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069135778] [2023-11-23 22:28:56,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069135778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:56,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100164794] [2023-11-23 22:28:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:56,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:56,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:56,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:56,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:28:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:56,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-23 22:28:56,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:56,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 7 [2023-11-23 22:28:56,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2023-11-23 22:28:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:28:58,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:28:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100164794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:59,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:59,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2023-11-23 22:28:59,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8979410] [2023-11-23 22:28:59,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:59,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 22:28:59,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:59,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 22:28:59,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-11-23 22:28:59,295 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand has 27 states, 23 states have (on average 3.652173913043478) internal successors, (84), 27 states have internal predecessors, (84), 11 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 22:29:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:01,222 INFO L93 Difference]: Finished difference Result 220 states and 305 transitions. [2023-11-23 22:29:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:29:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 3.652173913043478) internal successors, (84), 27 states have internal predecessors, (84), 11 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) Word has length 47 [2023-11-23 22:29:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:01,224 INFO L225 Difference]: With dead ends: 220 [2023-11-23 22:29:01,224 INFO L226 Difference]: Without dead ends: 137 [2023-11-23 22:29:01,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2023-11-23 22:29:01,226 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 140 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:01,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 641 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 22:29:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-23 22:29:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2023-11-23 22:29:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 66 states have internal predecessors, (77), 12 states have call successors, (12), 8 states have call predecessors, (12), 11 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-23 22:29:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2023-11-23 22:29:01,251 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 47 [2023-11-23 22:29:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:01,252 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2023-11-23 22:29:01,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 3.652173913043478) internal successors, (84), 27 states have internal predecessors, (84), 11 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 22:29:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2023-11-23 22:29:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 22:29:01,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:01,253 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 22:29:01,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:01,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:29:01,478 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:01,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2111806986, now seen corresponding path program 1 times [2023-11-23 22:29:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:01,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023824917] [2023-11-23 22:29:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:01,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:02,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 22:29:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:02,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 22:29:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:02,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:29:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:02,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-23 22:29:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:02,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-23 22:29:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:02,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 22:29:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:29:02,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:02,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023824917] [2023-11-23 22:29:02,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023824917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:02,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:02,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:29:02,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708199095] [2023-11-23 22:29:02,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:02,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:29:02,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:29:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:29:02,411 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 11 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 22:29:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:02,636 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2023-11-23 22:29:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:29:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 55 [2023-11-23 22:29:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:02,638 INFO L225 Difference]: With dead ends: 91 [2023-11-23 22:29:02,638 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 22:29:02,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:29:02,639 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:02,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 467 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:29:02,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 22:29:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-11-23 22:29:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 67 states have internal predecessors, (78), 12 states have call successors, (12), 9 states have call predecessors, (12), 11 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-23 22:29:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2023-11-23 22:29:02,659 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 55 [2023-11-23 22:29:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:02,660 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2023-11-23 22:29:02,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 22:29:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2023-11-23 22:29:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 22:29:02,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:02,662 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 22:29:02,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 22:29:02,662 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:02,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:02,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1089622941, now seen corresponding path program 1 times [2023-11-23 22:29:02,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:02,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108307276] [2023-11-23 22:29:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:02,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 22:29:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 22:29:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 22:29:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:29:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 22:29:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 22:29:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 22:29:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 22:29:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 22:29:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:29:03,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:03,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108307276] [2023-11-23 22:29:03,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108307276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:03,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:03,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:29:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169501726] [2023-11-23 22:29:03,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:29:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:29:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:29:03,985 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 22:29:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:04,630 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2023-11-23 22:29:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:29:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 74 [2023-11-23 22:29:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:04,632 INFO L225 Difference]: With dead ends: 95 [2023-11-23 22:29:04,632 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 22:29:04,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:29:04,633 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:04,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 42 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:29:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 22:29:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-23 22:29:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.21875) internal successors, (78), 68 states have internal predecessors, (78), 12 states have call successors, (12), 9 states have call predecessors, (12), 11 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-23 22:29:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2023-11-23 22:29:04,657 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 74 [2023-11-23 22:29:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:04,658 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2023-11-23 22:29:04,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 22:29:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2023-11-23 22:29:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 22:29:04,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:04,660 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 22:29:04,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 22:29:04,660 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:04,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:04,661 INFO L85 PathProgramCache]: Analyzing trace with hash 280276315, now seen corresponding path program 1 times [2023-11-23 22:29:04,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:04,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284159254] [2023-11-23 22:29:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:04,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:05,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 22:29:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:05,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 22:29:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:05,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 22:29:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:06,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 22:29:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:06,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 22:29:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:06,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 22:29:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 22:29:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:06,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 22:29:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:06,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 22:29:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 22:29:06,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:06,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284159254] [2023-11-23 22:29:06,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284159254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:29:06,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635597150] [2023-11-23 22:29:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:06,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:06,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:06,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:06,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:29:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:06,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 22:29:07,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:07,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 1 [2023-11-23 22:29:09,120 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| 24)))) is different from true [2023-11-23 22:29:11,287 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3| (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| 24)))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| 24))))) is different from true [2023-11-23 22:29:13,399 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4| (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| 24)))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| 24))))) is different from true [2023-11-23 22:29:15,565 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| 24)))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| 24))))) is different from true [2023-11-23 22:29:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 15 not checked. [2023-11-23 22:29:16,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:29:17,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50658 treesize of output 49890 [2023-11-23 22:29:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:29:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635597150] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:29:18,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:29:18,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [21, 16] total 42 [2023-11-23 22:29:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962420775] [2023-11-23 22:29:18,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:18,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:29:18,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:29:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1304, Unknown=4, NotChecked=300, Total=1722 [2023-11-23 22:29:18,447 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 10 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-23 22:29:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:29:18,905 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2023-11-23 22:29:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:29:18,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 74 [2023-11-23 22:29:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:29:18,907 INFO L225 Difference]: With dead ends: 106 [2023-11-23 22:29:18,907 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 22:29:18,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=137, Invalid=1597, Unknown=4, NotChecked=332, Total=2070 [2023-11-23 22:29:18,909 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:29:18,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 339 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:29:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 22:29:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-23 22:29:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.203125) internal successors, (77), 68 states have internal predecessors, (77), 12 states have call successors, (12), 9 states have call predecessors, (12), 11 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-23 22:29:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2023-11-23 22:29:18,935 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 74 [2023-11-23 22:29:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:29:18,935 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2023-11-23 22:29:18,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-23 22:29:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2023-11-23 22:29:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 22:29:18,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:29:18,937 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 22:29:18,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:19,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7476562-b586-4646-b417-3afc27a25b21/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-23 22:29:19,151 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:29:19,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:19,152 INFO L85 PathProgramCache]: Analyzing trace with hash -112750695, now seen corresponding path program 1 times [2023-11-23 22:29:19,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:19,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830548543] [2023-11-23 22:29:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:19,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:19,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 22:29:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat