./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i --full-output --preprocessor.use.memory.slicer false --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version abd6749d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 08:48:41,721 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 08:48:41,785 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 08:48:41,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 08:48:41,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 08:48:41,820 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 08:48:41,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 08:48:41,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 08:48:41,821 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 08:48:41,824 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 08:48:41,824 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 08:48:41,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 08:48:41,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 08:48:41,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 08:48:41,826 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 08:48:41,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 08:48:41,827 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 08:48:41,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 08:48:41,827 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 08:48:41,828 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 08:48:41,828 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 08:48:41,828 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 08:48:41,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 08:48:41,828 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 08:48:41,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 08:48:41,829 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 08:48:41,829 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 08:48:41,830 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 08:48:41,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 08:48:41,830 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 08:48:41,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 08:48:41,831 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 08:48:41,831 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 08:48:41,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 08:48:41,831 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 08:48:41,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 08:48:41,836 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 08:48:41,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 08:48:41,836 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 08:48:41,836 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-23 08:48:42,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 08:48:42,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 08:48:42,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 08:48:42,043 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 08:48:42,044 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 08:48:42,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i [2023-11-23 08:48:43,320 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 08:48:43,670 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 08:48:43,670 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i [2023-11-23 08:48:43,698 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c589b2f16/a1b71f111b6440c3bf3844d209bdb97f/FLAG50108d42e [2023-11-23 08:48:43,710 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c589b2f16/a1b71f111b6440c3bf3844d209bdb97f [2023-11-23 08:48:43,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 08:48:43,713 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 08:48:43,714 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 08:48:43,714 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 08:48:43,718 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 08:48:43,719 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:48:43" (1/1) ... [2023-11-23 08:48:43,720 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b905bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:43, skipping insertion in model container [2023-11-23 08:48:43,720 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:48:43" (1/1) ... [2023-11-23 08:48:43,790 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 08:48:44,090 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2023-11-23 08:48:44,098 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2023-11-23 08:48:44,604 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,609 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,610 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,610 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,611 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,620 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,621 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,622 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,623 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,623 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,624 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,624 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:44,878 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 08:48:44,879 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 08:48:44,880 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 08:48:44,881 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 08:48:44,881 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 08:48:44,882 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 08:48:44,882 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 08:48:44,883 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 08:48:44,883 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 08:48:44,884 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 08:48:44,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 08:48:44,991 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 08:48:45,002 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2023-11-23 08:48:45,003 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2023-11-23 08:48:45,029 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,029 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,029 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,030 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,030 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,046 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,047 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,049 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,049 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,050 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,051 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,058 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:48:45,096 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 08:48:45,097 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 08:48:45,098 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 08:48:45,098 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 08:48:45,099 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 08:48:45,099 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 08:48:45,100 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 08:48:45,100 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 08:48:45,101 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 08:48:45,101 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 08:48:45,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 08:48:45,300 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,301 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,301 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,301 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,301 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,301 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,301 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,302 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,302 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,302 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,302 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,302 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,302 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,302 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,302 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,303 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:48:45,308 INFO L206 MainTranslator]: Completed translation [2023-11-23 08:48:45,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45 WrapperNode [2023-11-23 08:48:45,309 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 08:48:45,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 08:48:45,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 08:48:45,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 08:48:45,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,451 INFO L138 Inliner]: procedures = 678, calls = 1036, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 91 [2023-11-23 08:48:45,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 08:48:45,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 08:48:45,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 08:48:45,452 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 08:48:45,459 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,465 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,480 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,495 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,502 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,505 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 08:48:45,507 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 08:48:45,508 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 08:48:45,508 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 08:48:45,508 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (1/1) ... [2023-11-23 08:48:45,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 08:48:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:48:45,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 08:48:45,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 08:48:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2023-11-23 08:48:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2023-11-23 08:48:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 08:48:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 08:48:45,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 08:48:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-23 08:48:45,612 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-23 08:48:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-11-23 08:48:45,612 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-11-23 08:48:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 08:48:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 08:48:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 08:48:45,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 08:48:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2023-11-23 08:48:45,614 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2023-11-23 08:48:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 08:48:45,614 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 08:48:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 08:48:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 08:48:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 08:48:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 08:48:45,783 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 08:48:45,784 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 08:48:45,947 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 08:48:45,968 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 08:48:45,969 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 08:48:45,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:48:45 BoogieIcfgContainer [2023-11-23 08:48:45,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 08:48:45,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 08:48:45,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 08:48:45,973 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 08:48:45,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:48:43" (1/3) ... [2023-11-23 08:48:45,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0034e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:48:45, skipping insertion in model container [2023-11-23 08:48:45,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:45" (2/3) ... [2023-11-23 08:48:45,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0034e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:48:45, skipping insertion in model container [2023-11-23 08:48:45,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:48:45" (3/3) ... [2023-11-23 08:48:45,977 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2023-11-23 08:48:45,990 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 08:48:45,992 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 08:48:46,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 08:48:46,080 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;@703ddf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 08:48:46,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 08:48:46,096 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 08:48:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 08:48:46,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:46,122 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 08:48:46,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:46,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash 432604891, now seen corresponding path program 1 times [2023-11-23 08:48:46,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:46,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003968180] [2023-11-23 08:48:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:46,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:46,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:46,488 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 08:48:46,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:46,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003968180] [2023-11-23 08:48:46,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003968180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:46,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:46,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 08:48:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632634038] [2023-11-23 08:48:46,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:46,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 08:48:46,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 08:48:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 08:48:46,530 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 08:48:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:46,563 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2023-11-23 08:48:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 08:48:46,566 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 08:48:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:46,572 INFO L225 Difference]: With dead ends: 104 [2023-11-23 08:48:46,572 INFO L226 Difference]: Without dead ends: 52 [2023-11-23 08:48:46,576 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 08:48:46,579 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 08:48:46,579 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 08:48:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-23 08:48:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-23 08:48:46,656 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 08:48:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2023-11-23 08:48:46,661 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 25 [2023-11-23 08:48:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:46,662 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2023-11-23 08:48:46,664 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 08:48:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2023-11-23 08:48:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 08:48:46,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:46,666 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 08:48:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 08:48:46,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:46,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:46,669 INFO L85 PathProgramCache]: Analyzing trace with hash -385043559, now seen corresponding path program 1 times [2023-11-23 08:48:46,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:46,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676680365] [2023-11-23 08:48:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:46,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:47,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:47,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:47,411 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 08:48:47,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:47,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676680365] [2023-11-23 08:48:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676680365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:47,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:47,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 08:48:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053054452] [2023-11-23 08:48:47,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:47,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 08:48:47,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 08:48:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 08:48:47,416 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 08:48:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:47,583 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2023-11-23 08:48:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 08:48:47,584 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 08:48:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:47,586 INFO L225 Difference]: With dead ends: 101 [2023-11-23 08:48:47,586 INFO L226 Difference]: Without dead ends: 55 [2023-11-23 08:48:47,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-23 08:48:47,587 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:47,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 297 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:48:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-23 08:48:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-23 08:48:47,594 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 08:48:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2023-11-23 08:48:47,595 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2023-11-23 08:48:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:47,595 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2023-11-23 08:48:47,595 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 08:48:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2023-11-23 08:48:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 08:48:47,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:47,596 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 08:48:47,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 08:48:47,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:47,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1194390185, now seen corresponding path program 1 times [2023-11-23 08:48:47,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:47,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869914789] [2023-11-23 08:48:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:47,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:47,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:47,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:48,036 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 08:48:48,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869914789] [2023-11-23 08:48:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869914789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:48,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:48,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 08:48:48,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106677009] [2023-11-23 08:48:48,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:48,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 08:48:48,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:48,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 08:48:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:48:48,039 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 08:48:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:48,228 INFO L93 Difference]: Finished difference Result 136 states and 184 transitions. [2023-11-23 08:48:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 08:48:48,229 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 08:48:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:48,230 INFO L225 Difference]: With dead ends: 136 [2023-11-23 08:48:48,230 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 08:48:48,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-23 08:48:48,231 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 97 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:48,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 401 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:48:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 08:48:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2023-11-23 08:48:48,238 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 08:48:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2023-11-23 08:48:48,238 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 25 [2023-11-23 08:48:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:48,239 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2023-11-23 08:48:48,239 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 08:48:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2023-11-23 08:48:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 08:48:48,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:48,240 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 08:48:48,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 08:48:48,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:48,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1587417195, now seen corresponding path program 1 times [2023-11-23 08:48:48,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:48,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379675380] [2023-11-23 08:48:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:48,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:48,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:48,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:48,604 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 08:48:48,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:48,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379675380] [2023-11-23 08:48:48,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379675380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:48,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:48,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 08:48:48,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047915533] [2023-11-23 08:48:48,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:48,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 08:48:48,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 08:48:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-23 08:48:48,607 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 08:48:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:48,785 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2023-11-23 08:48:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 08:48:48,786 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 08:48:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:48,787 INFO L225 Difference]: With dead ends: 158 [2023-11-23 08:48:48,788 INFO L226 Difference]: Without dead ends: 95 [2023-11-23 08:48:48,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-23 08:48:48,789 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 67 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:48,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 349 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:48:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-23 08:48:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-11-23 08:48:48,796 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 08:48:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2023-11-23 08:48:48,797 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 25 [2023-11-23 08:48:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:48,797 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2023-11-23 08:48:48,797 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 08:48:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2023-11-23 08:48:48,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 08:48:48,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:48,798 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 08:48:48,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 08:48:48,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:48,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1329251757, now seen corresponding path program 1 times [2023-11-23 08:48:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:48,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979019590] [2023-11-23 08:48:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:48,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:48,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:48,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,017 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 08:48:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:49,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979019590] [2023-11-23 08:48:49,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979019590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:49,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:49,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 08:48:49,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268853560] [2023-11-23 08:48:49,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:49,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 08:48:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:49,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 08:48:49,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-23 08:48:49,019 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 08:48:49,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:49,226 INFO L93 Difference]: Finished difference Result 173 states and 244 transitions. [2023-11-23 08:48:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 08:48:49,227 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 08:48:49,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:49,228 INFO L225 Difference]: With dead ends: 173 [2023-11-23 08:48:49,228 INFO L226 Difference]: Without dead ends: 104 [2023-11-23 08:48:49,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-23 08:48:49,229 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 48 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:49,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 410 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:48:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-23 08:48:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2023-11-23 08:48:49,236 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 08:48:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2023-11-23 08:48:49,237 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 25 [2023-11-23 08:48:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:49,252 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2023-11-23 08:48:49,252 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 08:48:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2023-11-23 08:48:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 08:48:49,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:49,253 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 08:48:49,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 08:48:49,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:49,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2089459861, now seen corresponding path program 1 times [2023-11-23 08:48:49,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:49,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331756373] [2023-11-23 08:48:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:49,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,324 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 08:48:49,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:49,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331756373] [2023-11-23 08:48:49,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331756373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:49,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:49,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 08:48:49,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785517019] [2023-11-23 08:48:49,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:49,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 08:48:49,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:49,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 08:48:49,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 08:48:49,327 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 08:48:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:49,354 INFO L93 Difference]: Finished difference Result 146 states and 203 transitions. [2023-11-23 08:48:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:48:49,354 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 08:48:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:49,357 INFO L225 Difference]: With dead ends: 146 [2023-11-23 08:48:49,357 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 08:48:49,359 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 08:48:49,359 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 08:48:49,360 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 08:48:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 08:48:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2023-11-23 08:48:49,374 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 08:48:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2023-11-23 08:48:49,376 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 25 [2023-11-23 08:48:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:49,376 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2023-11-23 08:48:49,376 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 08:48:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2023-11-23 08:48:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 08:48:49,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:49,378 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 08:48:49,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 08:48:49,379 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:49,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1947341997, now seen corresponding path program 1 times [2023-11-23 08:48:49,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:49,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113112970] [2023-11-23 08:48:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:49,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,470 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 08:48:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:49,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113112970] [2023-11-23 08:48:49,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113112970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:49,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:49,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 08:48:49,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901826781] [2023-11-23 08:48:49,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:49,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 08:48:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 08:48:49,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 08:48:49,472 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 08:48:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:49,498 INFO L93 Difference]: Finished difference Result 145 states and 200 transitions. [2023-11-23 08:48:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:48:49,499 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 08:48:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:49,501 INFO L225 Difference]: With dead ends: 145 [2023-11-23 08:48:49,501 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 08:48:49,501 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 08:48:49,502 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 08:48:49,503 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 08:48:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 08:48:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2023-11-23 08:48:49,512 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 08:48:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2023-11-23 08:48:49,513 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 25 [2023-11-23 08:48:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:49,513 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2023-11-23 08:48:49,513 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 08:48:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2023-11-23 08:48:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 08:48:49,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:49,517 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 08:48:49,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 08:48:49,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:49,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1954598289, now seen corresponding path program 1 times [2023-11-23 08:48:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:49,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409758686] [2023-11-23 08:48:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,617 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 08:48:49,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:49,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409758686] [2023-11-23 08:48:49,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409758686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:49,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:49,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 08:48:49,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212152525] [2023-11-23 08:48:49,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:49,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 08:48:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 08:48:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 08:48:49,619 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 08:48:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:49,685 INFO L93 Difference]: Finished difference Result 152 states and 203 transitions. [2023-11-23 08:48:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 08:48:49,686 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 08:48:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:49,686 INFO L225 Difference]: With dead ends: 152 [2023-11-23 08:48:49,687 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 08:48:49,687 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 08:48:49,688 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 18 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 08:48:49,688 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 08:48:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 08:48:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-23 08:48:49,694 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 08:48:49,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2023-11-23 08:48:49,695 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 25 [2023-11-23 08:48:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:49,696 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-23 08:48:49,696 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 08:48:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2023-11-23 08:48:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 08:48:49,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:49,697 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 08:48:49,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 08:48:49,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:49,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:49,698 INFO L85 PathProgramCache]: Analyzing trace with hash 133984565, now seen corresponding path program 1 times [2023-11-23 08:48:49,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:49,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371361747] [2023-11-23 08:48:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:49,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:49,824 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 08:48:49,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:49,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371361747] [2023-11-23 08:48:49,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371361747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:49,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:49,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 08:48:49,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316813246] [2023-11-23 08:48:49,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:49,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 08:48:49,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 08:48:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 08:48:49,827 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 08:48:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:49,940 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2023-11-23 08:48:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 08:48:49,940 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 08:48:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:49,941 INFO L225 Difference]: With dead ends: 132 [2023-11-23 08:48:49,941 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 08:48:49,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 08:48:49,943 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 08:48:49,943 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 08:48:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 08:48:49,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-23 08:48:49,947 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 08:48:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2023-11-23 08:48:49,948 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 27 [2023-11-23 08:48:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:49,948 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2023-11-23 08:48:49,948 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 08:48:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2023-11-23 08:48:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 08:48:49,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:49,950 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 08:48:49,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 08:48:49,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:49,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:49,951 INFO L85 PathProgramCache]: Analyzing trace with hash 652102594, now seen corresponding path program 1 times [2023-11-23 08:48:49,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:49,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100440286] [2023-11-23 08:48:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,069 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 08:48:50,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:50,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100440286] [2023-11-23 08:48:50,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100440286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 08:48:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771602761] [2023-11-23 08:48:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 08:48:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 08:48:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 08:48:50,071 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 08:48:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:50,113 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2023-11-23 08:48:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 08:48:50,114 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 08:48:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:50,115 INFO L225 Difference]: With dead ends: 132 [2023-11-23 08:48:50,115 INFO L226 Difference]: Without dead ends: 72 [2023-11-23 08:48:50,115 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 08:48:50,115 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:50,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 245 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 08:48:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-23 08:48:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2023-11-23 08:48:50,120 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 08:48:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2023-11-23 08:48:50,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 29 [2023-11-23 08:48:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:50,121 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2023-11-23 08:48:50,121 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 08:48:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2023-11-23 08:48:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 08:48:50,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:50,122 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 08:48:50,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 08:48:50,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:50,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:50,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1663723829, now seen corresponding path program 1 times [2023-11-23 08:48:50,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:50,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598410880] [2023-11-23 08:48:50,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:50,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,204 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 08:48:50,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:50,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598410880] [2023-11-23 08:48:50,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598410880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:50,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:50,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 08:48:50,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089256049] [2023-11-23 08:48:50,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:50,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 08:48:50,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 08:48:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 08:48:50,206 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 08:48:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:50,267 INFO L93 Difference]: Finished difference Result 138 states and 181 transitions. [2023-11-23 08:48:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 08:48:50,267 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 08:48:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:50,268 INFO L225 Difference]: With dead ends: 138 [2023-11-23 08:48:50,268 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 08:48:50,268 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 08:48:50,269 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:50,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 251 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 08:48:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 08:48:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2023-11-23 08:48:50,273 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 08:48:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-11-23 08:48:50,274 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 30 [2023-11-23 08:48:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:50,274 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-11-23 08:48:50,274 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 08:48:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-11-23 08:48:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 08:48:50,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:50,288 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 08:48:50,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 08:48:50,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:50,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash 853391152, now seen corresponding path program 1 times [2023-11-23 08:48:50,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:50,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359360560] [2023-11-23 08:48:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:50,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:50,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:48:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:51,152 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 08:48:51,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:51,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359360560] [2023-11-23 08:48:51,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359360560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:51,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:51,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 08:48:51,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789009472] [2023-11-23 08:48:51,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:51,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 08:48:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 08:48:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2023-11-23 08:48:51,153 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 08:48:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:51,584 INFO L93 Difference]: Finished difference Result 150 states and 194 transitions. [2023-11-23 08:48:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 08:48:51,585 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 08:48:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:51,586 INFO L225 Difference]: With dead ends: 150 [2023-11-23 08:48:51,586 INFO L226 Difference]: Without dead ends: 86 [2023-11-23 08:48:51,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-11-23 08:48:51,587 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:51,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 423 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:48:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-23 08:48:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2023-11-23 08:48:51,599 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 08:48:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2023-11-23 08:48:51,599 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 37 [2023-11-23 08:48:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:51,600 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2023-11-23 08:48:51,600 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 08:48:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2023-11-23 08:48:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 08:48:51,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:51,601 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 08:48:51,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 08:48:51,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:51,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:51,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1554455730, now seen corresponding path program 1 times [2023-11-23 08:48:51,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:51,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14365570] [2023-11-23 08:48:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:51,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:51,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:51,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:51,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:48:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:51,955 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 08:48:51,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:51,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14365570] [2023-11-23 08:48:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14365570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:51,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:51,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 08:48:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016016820] [2023-11-23 08:48:51,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 08:48:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 08:48:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-23 08:48:51,957 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 08:48:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:52,294 INFO L93 Difference]: Finished difference Result 172 states and 237 transitions. [2023-11-23 08:48:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 08:48:52,295 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 08:48:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:52,295 INFO L225 Difference]: With dead ends: 172 [2023-11-23 08:48:52,296 INFO L226 Difference]: Without dead ends: 104 [2023-11-23 08:48:52,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-11-23 08:48:52,296 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:52,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 425 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:48:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-23 08:48:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2023-11-23 08:48:52,302 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 08:48:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2023-11-23 08:48:52,303 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 37 [2023-11-23 08:48:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:52,303 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2023-11-23 08:48:52,303 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 08:48:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2023-11-23 08:48:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 08:48:52,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:52,303 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 08:48:52,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 08:48:52,304 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:52,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:52,304 INFO L85 PathProgramCache]: Analyzing trace with hash 967649716, now seen corresponding path program 1 times [2023-11-23 08:48:52,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:52,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569790197] [2023-11-23 08:48:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:52,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:52,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:52,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:52,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:48:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:52,506 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 08:48:52,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:52,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569790197] [2023-11-23 08:48:52,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569790197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:52,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:52,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 08:48:52,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517035942] [2023-11-23 08:48:52,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:52,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 08:48:52,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 08:48:52,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:48:52,509 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 08:48:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:52,670 INFO L93 Difference]: Finished difference Result 172 states and 243 transitions. [2023-11-23 08:48:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 08:48:52,670 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 08:48:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:52,671 INFO L225 Difference]: With dead ends: 172 [2023-11-23 08:48:52,671 INFO L226 Difference]: Without dead ends: 83 [2023-11-23 08:48:52,672 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 08:48:52,672 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 46 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:52,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 461 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:48:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-23 08:48:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2023-11-23 08:48:52,678 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 08:48:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2023-11-23 08:48:52,678 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 37 [2023-11-23 08:48:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:52,679 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2023-11-23 08:48:52,679 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 08:48:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2023-11-23 08:48:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 08:48:52,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:52,680 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 08:48:52,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 08:48:52,680 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:52,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash 512098045, now seen corresponding path program 1 times [2023-11-23 08:48:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169899519] [2023-11-23 08:48:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:52,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:52,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:52,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:53,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:48:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:53,147 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 08:48:53,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:53,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169899519] [2023-11-23 08:48:53,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169899519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:48:53,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027676081] [2023-11-23 08:48:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:53,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:48:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:48:53,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:48:53,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 08:48:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:53,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 08:48:53,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:48:53,368 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 32 treesize of output 7 [2023-11-23 08:48:53,610 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 08:48:53,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:48:53,839 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 08:48:53,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027676081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:48:53,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 08:48:53,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2023-11-23 08:48:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196216674] [2023-11-23 08:48:53,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 08:48:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 08:48:53,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 08:48:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-11-23 08:48:53,843 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 27 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 25 states have internal predecessors, (74), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 08:48:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:54,302 INFO L93 Difference]: Finished difference Result 178 states and 241 transitions. [2023-11-23 08:48:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 08:48:54,303 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 25 states have internal predecessors, (74), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2023-11-23 08:48:54,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:54,304 INFO L225 Difference]: With dead ends: 178 [2023-11-23 08:48:54,304 INFO L226 Difference]: Without dead ends: 105 [2023-11-23 08:48:54,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 08:48:54,306 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 143 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 08:48:54,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 566 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 08:48:54,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-23 08:48:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2023-11-23 08:48:54,316 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 08:48:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2023-11-23 08:48:54,318 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 39 [2023-11-23 08:48:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:54,319 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2023-11-23 08:48:54,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 25 states have internal predecessors, (74), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 08:48:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2023-11-23 08:48:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 08:48:54,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:54,319 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 08:48:54,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 08:48:54,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 08:48:54,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:54,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1618550106, now seen corresponding path program 1 times [2023-11-23 08:48:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:54,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080705995] [2023-11-23 08:48:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:54,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:54,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:54,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:48:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:54,669 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 08:48:54,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:54,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080705995] [2023-11-23 08:48:54,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080705995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:48:54,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:48:54,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 08:48:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905223161] [2023-11-23 08:48:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:48:54,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 08:48:54,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:48:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 08:48:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 08:48:54,671 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 08:48:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:48:54,720 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2023-11-23 08:48:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 08:48:54,720 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 08:48:54,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:48:54,721 INFO L225 Difference]: With dead ends: 100 [2023-11-23 08:48:54,721 INFO L226 Difference]: Without dead ends: 98 [2023-11-23 08:48:54,721 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 08:48:54,722 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 08:48:54,722 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 08:48:54,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-23 08:48:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2023-11-23 08:48:54,732 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 08:48:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2023-11-23 08:48:54,733 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 40 [2023-11-23 08:48:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:48:54,734 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2023-11-23 08:48:54,734 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 08:48:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2023-11-23 08:48:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 08:48:54,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:48:54,735 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 08:48:54,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 08:48:54,735 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:48:54,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:48:54,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1729626261, now seen corresponding path program 1 times [2023-11-23 08:48:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:48:54,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532475807] [2023-11-23 08:48:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:48:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:54,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:48:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:55,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:48:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:55,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:48:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:55,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-23 08:48:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:55,388 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 08:48:55,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:48:55,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532475807] [2023-11-23 08:48:55,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532475807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:48:55,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374817389] [2023-11-23 08:48:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:48:55,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:48:55,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:48:55,405 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:48:55,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 08:48:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:48:55,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-23 08:48:55,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:48:55,650 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 32 treesize of output 7 [2023-11-23 08:48:55,658 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 32 treesize of output 7 [2023-11-23 08:49:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 08:49:19,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:49:19,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374817389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:49:19,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:49:19,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21] total 31 [2023-11-23 08:49:19,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529594457] [2023-11-23 08:49:19,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:49:19,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 08:49:19,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:49:19,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 08:49:19,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=887, Unknown=11, NotChecked=0, Total=992 [2023-11-23 08:49:19,651 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand has 31 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 10 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 08:49:22,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:49:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:49:23,965 INFO L93 Difference]: Finished difference Result 220 states and 305 transitions. [2023-11-23 08:49:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 08:49:23,966 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 10 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 47 [2023-11-23 08:49:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:49:23,966 INFO L225 Difference]: With dead ends: 220 [2023-11-23 08:49:23,966 INFO L226 Difference]: Without dead ends: 137 [2023-11-23 08:49:23,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=414, Invalid=3115, Unknown=11, NotChecked=0, Total=3540 [2023-11-23 08:49:23,971 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 247 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:49:23,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 737 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1082 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 08:49:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-23 08:49:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2023-11-23 08:49:23,982 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 08:49:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2023-11-23 08:49:23,983 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 47 [2023-11-23 08:49:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:49:23,984 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2023-11-23 08:49:23,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 10 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 08:49:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2023-11-23 08:49:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 08:49:23,984 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:49:23,985 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 08:49:23,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 08:49:24,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 08:49:24,244 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:49:24,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:49:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2111806986, now seen corresponding path program 1 times [2023-11-23 08:49:24,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:49:24,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176230895] [2023-11-23 08:49:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:49:24,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:49:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:24,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 08:49:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:24,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-23 08:49:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:24,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:49:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-23 08:49:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:24,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-23 08:49:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:24,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:24,745 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 08:49:24,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:49:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176230895] [2023-11-23 08:49:24,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176230895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:49:24,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:49:24,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 08:49:24,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487823009] [2023-11-23 08:49:24,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:49:24,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 08:49:24,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:49:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 08:49:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:49:24,747 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 08:49:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:49:24,881 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2023-11-23 08:49:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 08:49:24,881 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 08:49:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:49:24,882 INFO L225 Difference]: With dead ends: 91 [2023-11-23 08:49:24,882 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 08:49:24,883 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 08:49:24,883 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 11 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:49:24,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 508 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:49:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 08:49:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-11-23 08:49:24,892 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 08:49:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2023-11-23 08:49:24,893 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 55 [2023-11-23 08:49:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:49:24,893 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2023-11-23 08:49:24,893 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 08:49:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2023-11-23 08:49:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 08:49:24,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:49:24,895 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 08:49:24,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 08:49:24,895 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:49:24,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:49:24,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1089622941, now seen corresponding path program 1 times [2023-11-23 08:49:24,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:49:24,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769332261] [2023-11-23 08:49:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:49:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:49:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:49:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:49:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:49:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:49:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:49:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:49:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 08:49:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:49:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769332261] [2023-11-23 08:49:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769332261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:49:25,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:49:25,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 08:49:25,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391862919] [2023-11-23 08:49:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:49:25,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 08:49:25,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:49:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 08:49:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-23 08:49:25,751 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 14 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 08:49:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:49:26,113 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2023-11-23 08:49:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 08:49:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 74 [2023-11-23 08:49:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:49:26,114 INFO L225 Difference]: With dead ends: 95 [2023-11-23 08:49:26,114 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 08:49:26,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-23 08:49:26,116 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 08:49:26,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 53 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 08:49:26,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 08:49:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-23 08:49:26,126 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 08:49:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2023-11-23 08:49:26,127 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 74 [2023-11-23 08:49:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:49:26,127 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2023-11-23 08:49:26,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 08:49:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2023-11-23 08:49:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 08:49:26,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:49:26,128 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 08:49:26,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 08:49:26,129 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:49:26,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:49:26,130 INFO L85 PathProgramCache]: Analyzing trace with hash 280276315, now seen corresponding path program 1 times [2023-11-23 08:49:26,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:49:26,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022601667] [2023-11-23 08:49:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:49:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:49:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:26,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:26,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:49:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:27,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:49:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:27,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:49:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:27,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:49:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:27,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:27,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:49:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:27,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:49:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:27,822 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 08:49:27,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:49:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022601667] [2023-11-23 08:49:27,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022601667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:49:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637775688] [2023-11-23 08:49:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:49:27,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:49:27,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:49:27,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:49:27,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 08:49:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:27,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 08:49:27,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:49:28,016 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 08:49:30,053 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$.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 08:49:32,152 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| 24)))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| 24))))) is different from true [2023-11-23 08:49:34,227 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$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| 24)))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| (select (select |c_#memory_$Pointer$.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 08:49:36,374 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$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| 24)))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_2| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_2| (select (select |c_#memory_$Pointer$.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 08:49:37,043 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 08:49:37,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:49:37,439 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 3130 treesize of output 3082 [2023-11-23 08:49:37,534 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 08:49:37,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637775688] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 08:49:37,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:49:37,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [24, 16] total 45 [2023-11-23 08:49:37,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986621317] [2023-11-23 08:49:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:49:37,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 08:49:37,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:49:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 08:49:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1531, Unknown=4, NotChecked=324, Total=1980 [2023-11-23 08:49:37,536 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 08:49:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:49:37,765 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2023-11-23 08:49:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 08:49:37,766 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 08:49:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:49:37,766 INFO L225 Difference]: With dead ends: 106 [2023-11-23 08:49:37,766 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 08:49:37,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=144, Invalid=1848, Unknown=4, NotChecked=356, Total=2352 [2023-11-23 08:49:37,767 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 62 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:49:37,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 311 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:49:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 08:49:37,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-23 08:49:37,779 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 08:49:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2023-11-23 08:49:37,780 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 74 [2023-11-23 08:49:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:49:37,780 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2023-11-23 08:49:37,780 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 08:49:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2023-11-23 08:49:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 08:49:37,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:49:37,781 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 08:49:37,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 08:49:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:49:37,993 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:49:37,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:49:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash -112750695, now seen corresponding path program 1 times [2023-11-23 08:49:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:49:37,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091295466] [2023-11-23 08:49:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:49:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:49:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:38,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:38,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:49:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:39,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:49:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:49:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:39,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:49:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:39,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:39,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:49:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:49:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 08:49:39,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:49:39,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091295466] [2023-11-23 08:49:39,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091295466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:49:39,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830014953] [2023-11-23 08:49:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:49:39,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:49:39,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:49:39,393 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:49:39,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 08:49:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:39,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 08:49:39,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:49:39,549 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 42 treesize of output 9 [2023-11-23 08:49:39,557 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 36 treesize of output 19 [2023-11-23 08:49:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 08:49:40,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:49:40,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830014953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:49:40,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:49:40,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 23 [2023-11-23 08:49:40,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442851349] [2023-11-23 08:49:40,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:49:40,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 08:49:40,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:49:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 08:49:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-11-23 08:49:40,489 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 11 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 08:49:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:49:41,559 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2023-11-23 08:49:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 08:49:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 74 [2023-11-23 08:49:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:49:41,560 INFO L225 Difference]: With dead ends: 109 [2023-11-23 08:49:41,560 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 08:49:41,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-11-23 08:49:41,561 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 64 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 08:49:41,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 283 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 08:49:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 08:49:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-23 08:49:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.1875) internal successors, (76), 68 states have internal predecessors, (76), 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 08:49:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2023-11-23 08:49:41,582 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 74 [2023-11-23 08:49:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:49:41,582 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2023-11-23 08:49:41,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-23 08:49:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2023-11-23 08:49:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 08:49:41,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:49:41,592 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:49:41,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 08:49:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:49:41,805 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:49:41,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:49:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash 145414743, now seen corresponding path program 1 times [2023-11-23 08:49:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:49:41,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365539571] [2023-11-23 08:49:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:49:41,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:49:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:49:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:49:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:49:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:49:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:49:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:49:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:49:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 08:49:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:49:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365539571] [2023-11-23 08:49:42,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365539571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:49:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099337449] [2023-11-23 08:49:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:49:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:49:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:49:42,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:49:42,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 08:49:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:49:42,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 08:49:42,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:49:44,670 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_18| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_18| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_18| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_18|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_18|))) is different from true [2023-11-23 08:49:46,780 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_19| Int) (|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_19| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_19| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_19|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_19|))) is different from true [2023-11-23 08:49:48,832 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_20| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_20| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_20| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_20|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_20|))) is different from true [2023-11-23 08:49:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-23 08:49:49,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:49:49,488 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 15 treesize of output 7 [2023-11-23 08:49:49,620 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-23 08:49:49,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-23 08:49:49,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 08:49:49,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2023-11-23 08:49:49,894 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 08:49:49,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099337449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:49:49,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 08:49:49,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 15] total 41 [2023-11-23 08:49:49,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040223492] [2023-11-23 08:49:49,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 08:49:49,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-23 08:49:49,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:49:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-23 08:49:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1287, Unknown=3, NotChecked=222, Total=1640 [2023-11-23 08:49:49,896 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 41 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 36 states have internal predecessors, (115), 18 states have call successors, (26), 7 states have call predecessors, (26), 13 states have return successors, (25), 14 states have call predecessors, (25), 17 states have call successors, (25) [2023-11-23 08:49:51,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:49:54,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:50:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:50:08,422 INFO L93 Difference]: Finished difference Result 191 states and 258 transitions. [2023-11-23 08:50:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-23 08:50:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 36 states have internal predecessors, (115), 18 states have call successors, (26), 7 states have call predecessors, (26), 13 states have return successors, (25), 14 states have call predecessors, (25), 17 states have call successors, (25) Word has length 74 [2023-11-23 08:50:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:50:08,424 INFO L225 Difference]: With dead ends: 191 [2023-11-23 08:50:08,424 INFO L226 Difference]: Without dead ends: 112 [2023-11-23 08:50:08,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=793, Invalid=3770, Unknown=5, NotChecked=402, Total=4970 [2023-11-23 08:50:08,425 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 616 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 124 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-23 08:50:08,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 102 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1940 Invalid, 2 Unknown, 584 Unchecked, 5.3s Time] [2023-11-23 08:50:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-23 08:50:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2023-11-23 08:50:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 73 states have internal predecessors, (77), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-23 08:50:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2023-11-23 08:50:08,437 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 74 [2023-11-23 08:50:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:50:08,437 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2023-11-23 08:50:08,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 36 states have internal predecessors, (115), 18 states have call successors, (26), 7 states have call predecessors, (26), 13 states have return successors, (25), 14 states have call predecessors, (25), 17 states have call successors, (25) [2023-11-23 08:50:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2023-11-23 08:50:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-23 08:50:08,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:50:08,438 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 08:50:08,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 08:50:08,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-23 08:50:08,650 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:50:08,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:50:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2086956748, now seen corresponding path program 1 times [2023-11-23 08:50:08,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:50:08,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501859461] [2023-11-23 08:50:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:50:08,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:50:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:50:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:50:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:50:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:50:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:50:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:50:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:50:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:50:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:50:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:09,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:50:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 08:50:10,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:50:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501859461] [2023-11-23 08:50:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501859461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:50:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79077295] [2023-11-23 08:50:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:50:10,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:50:10,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:50:10,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:50:10,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 08:50:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:50:10,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 136 conjunts are in the unsatisfiable core [2023-11-23 08:50:10,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:50:10,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:50:10,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:50:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:50:10,281 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 42 treesize of output 9 [2023-11-23 08:50:12,311 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_27| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_27| Int)) (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_27|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_27| 24)) |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_27|)) is different from true [2023-11-23 08:50:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-11-23 08:50:26,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:50:27,570 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 31 treesize of output 29 [2023-11-23 08:50:27,572 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 08:50:27,573 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 08:50:27,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:50:29,961 WARN L854 $PredicateComparison]: unable to prove that (or (= (mod |c_aws_linked_list_empty_#res| 256) 0) (and (forall ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_32| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_32| Int)) (= |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_32| (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_32|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_32|)) (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_32|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_32|) 8)))) (forall ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_32| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_32| Int)) (= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_32| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_32|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_32|)) (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_32|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_32|) 8))))) (and (= (+ 16 |c_aws_linked_list_empty_#in~list.offset|) (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_empty_#in~list.base|) |c_aws_linked_list_empty_#in~list.offset|)) (= |c_aws_linked_list_empty_#in~list.base| (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_empty_#in~list.base|) |c_aws_linked_list_empty_#in~list.offset|)))) is different from false [2023-11-23 08:50:54,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79077295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:50:54,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:50:54,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 36] total 51 [2023-11-23 08:50:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233062150] [2023-11-23 08:50:54,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:50:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-23 08:50:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:50:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-23 08:50:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=3416, Unknown=15, NotChecked=238, Total=3906 [2023-11-23 08:50:54,759 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 51 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 15 states have call successors, (19), 6 states have call predecessors, (19), 14 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2023-11-23 08:51:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:51:08,450 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2023-11-23 08:51:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-23 08:51:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 15 states have call successors, (19), 6 states have call predecessors, (19), 14 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) Word has length 86 [2023-11-23 08:51:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:51:08,451 INFO L225 Difference]: With dead ends: 130 [2023-11-23 08:51:08,451 INFO L226 Difference]: Without dead ends: 118 [2023-11-23 08:51:08,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=905, Invalid=9594, Unknown=15, NotChecked=406, Total=10920 [2023-11-23 08:51:08,453 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 283 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2825 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-11-23 08:51:08,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 128 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2825 Invalid, 0 Unknown, 120 Unchecked, 6.4s Time] [2023-11-23 08:51:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-23 08:51:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2023-11-23 08:51:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.08) internal successors, (81), 76 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2023-11-23 08:51:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2023-11-23 08:51:08,469 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 86 [2023-11-23 08:51:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:51:08,470 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2023-11-23 08:51:08,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 15 states have call successors, (19), 6 states have call predecessors, (19), 14 states have return successors, (19), 15 states have call predecessors, (19), 14 states have call successors, (19) [2023-11-23 08:51:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2023-11-23 08:51:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-23 08:51:08,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:51:08,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:08,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 08:51:08,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:51:08,684 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:51:08,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:51:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1385892170, now seen corresponding path program 1 times [2023-11-23 08:51:08,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:51:08,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850520126] [2023-11-23 08:51:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:51:08,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:51:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:51:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:51:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:51:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:51:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:51:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:51:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:51:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:51:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:51:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:51:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 08:51:09,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:51:09,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850520126] [2023-11-23 08:51:09,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850520126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:51:09,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380917790] [2023-11-23 08:51:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:51:09,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:51:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:51:09,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:51:09,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 08:51:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:51:09,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-23 08:51:09,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:51:12,283 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_35| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_35| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_35| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_35|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_35|))) is different from true [2023-11-23 08:51:14,365 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_36| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_36| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_36| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_36|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_36|))) is different from true [2023-11-23 08:51:16,453 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_37| Int) (|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_37| Int)) (<= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_37| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_37|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_37|))) is different from true [2023-11-23 08:51:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-23 08:51:17,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:51:19,111 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 15 treesize of output 7 [2023-11-23 08:51:19,363 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-23 08:51:19,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-23 08:51:19,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 08:51:19,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2023-11-23 08:51:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 08:51:20,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380917790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:51:20,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 08:51:20,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 19] total 52 [2023-11-23 08:51:20,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565062628] [2023-11-23 08:51:20,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 08:51:20,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-23 08:51:20,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:51:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-23 08:51:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2184, Unknown=3, NotChecked=288, Total=2652 [2023-11-23 08:51:20,013 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 52 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 47 states have internal predecessors, (137), 21 states have call successors, (29), 7 states have call predecessors, (29), 16 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2023-11-23 08:51:22,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:51:24,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:52:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:52:00,809 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2023-11-23 08:52:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-23 08:52:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 47 states have internal predecessors, (137), 21 states have call successors, (29), 7 states have call predecessors, (29), 16 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) Word has length 86 [2023-11-23 08:52:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:52:00,811 INFO L225 Difference]: With dead ends: 126 [2023-11-23 08:52:00,811 INFO L226 Difference]: Without dead ends: 106 [2023-11-23 08:52:00,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=627, Invalid=4927, Unknown=8, NotChecked=444, Total=6006 [2023-11-23 08:52:00,813 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 326 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 81 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-11-23 08:52:00,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 138 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2135 Invalid, 2 Unknown, 398 Unchecked, 7.8s Time] [2023-11-23 08:52:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-23 08:52:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2023-11-23 08:52:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 74 states have internal predecessors, (80), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-23 08:52:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2023-11-23 08:52:00,845 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 86 [2023-11-23 08:52:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:52:00,845 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2023-11-23 08:52:00,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 47 states have internal predecessors, (137), 21 states have call successors, (29), 7 states have call predecessors, (29), 16 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2023-11-23 08:52:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2023-11-23 08:52:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 08:52:00,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:52:00,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:52:00,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 08:52:01,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:52:01,048 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:52:01,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:52:01,048 INFO L85 PathProgramCache]: Analyzing trace with hash 364386305, now seen corresponding path program 1 times [2023-11-23 08:52:01,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:52:01,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691870269] [2023-11-23 08:52:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:52:01,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:52:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:52:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:52:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:52:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:52:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:52:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:52:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:52:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 08:52:01,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:52:01,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691870269] [2023-11-23 08:52:01,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691870269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:52:01,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133575222] [2023-11-23 08:52:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:52:01,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:52:01,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:52:01,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:52:01,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 08:52:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:02,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-23 08:52:02,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:52:02,159 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 46 treesize of output 9 [2023-11-23 08:52:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 08:52:09,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:52:14,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3350 treesize of output 3318 [2023-11-23 08:52:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 08:52:15,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133575222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:52:15,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 08:52:15,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2023-11-23 08:52:15,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272963148] [2023-11-23 08:52:15,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 08:52:15,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-23 08:52:15,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:52:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-23 08:52:15,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 08:52:15,081 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 33 states, 26 states have (on average 5.423076923076923) internal successors, (141), 29 states have internal predecessors, (141), 19 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (28), 15 states have call predecessors, (28), 18 states have call successors, (28) [2023-11-23 08:52:17,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:52:19,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:52:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:52:23,475 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2023-11-23 08:52:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 08:52:23,476 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 5.423076923076923) internal successors, (141), 29 states have internal predecessors, (141), 19 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (28), 15 states have call predecessors, (28), 18 states have call successors, (28) Word has length 88 [2023-11-23 08:52:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:52:23,477 INFO L225 Difference]: With dead ends: 113 [2023-11-23 08:52:23,477 INFO L226 Difference]: Without dead ends: 104 [2023-11-23 08:52:23,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=370, Invalid=2282, Unknown=0, NotChecked=0, Total=2652 [2023-11-23 08:52:23,478 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 163 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:52:23,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 99 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1882 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2023-11-23 08:52:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-23 08:52:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2023-11-23 08:52:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.08) internal successors, (81), 75 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-23 08:52:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2023-11-23 08:52:23,514 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 88 [2023-11-23 08:52:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:52:23,514 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2023-11-23 08:52:23,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 5.423076923076923) internal successors, (141), 29 states have internal predecessors, (141), 19 states have call successors, (29), 5 states have call predecessors, (29), 10 states have return successors, (28), 15 states have call predecessors, (28), 18 states have call successors, (28) [2023-11-23 08:52:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2023-11-23 08:52:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 08:52:23,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:52:23,517 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:52:23,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 08:52:23,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-23 08:52:23,728 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:52:23,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:52:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1048459862, now seen corresponding path program 1 times [2023-11-23 08:52:23,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:52:23,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571077135] [2023-11-23 08:52:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:52:23,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:52:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:23,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:23,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:23,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:52:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:24,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:52:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:24,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:52:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:24,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:52:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:24,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:24,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:52:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:24,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:52:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:24,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:52:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 08:52:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:52:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571077135] [2023-11-23 08:52:24,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571077135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:52:24,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:52:24,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 08:52:24,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693621599] [2023-11-23 08:52:24,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:52:24,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 08:52:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:52:24,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 08:52:24,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 08:52:24,134 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 08:52:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:52:24,821 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2023-11-23 08:52:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 08:52:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 89 [2023-11-23 08:52:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:52:24,822 INFO L225 Difference]: With dead ends: 108 [2023-11-23 08:52:24,822 INFO L226 Difference]: Without dead ends: 99 [2023-11-23 08:52:24,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-23 08:52:24,823 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 08:52:24,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 81 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 08:52:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-23 08:52:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-23 08:52:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-23 08:52:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2023-11-23 08:52:24,844 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2023-11-23 08:52:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:52:24,845 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2023-11-23 08:52:24,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 08:52:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2023-11-23 08:52:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-23 08:52:24,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:52:24,850 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 08:52:24,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-23 08:52:24,850 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:52:24,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:52:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1601858449, now seen corresponding path program 2 times [2023-11-23 08:52:24,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:52:24,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163054996] [2023-11-23 08:52:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:52:24,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:52:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:52:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:52:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:52:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:52:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:52:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:52:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:25,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:52:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:26,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:52:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:26,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-23 08:52:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:52:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 08:52:26,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:52:26,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163054996] [2023-11-23 08:52:26,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163054996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:52:26,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177891583] [2023-11-23 08:52:26,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 08:52:26,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:52:26,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:52:26,590 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:52:26,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 08:52:26,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 08:52:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:52:26,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-23 08:52:26,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:52:26,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:52:26,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:52:26,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:52:26,852 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 44 treesize of output 7 [2023-11-23 08:52:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:52:26,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:52:26,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:52:26,879 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 46 treesize of output 9 [2023-11-23 08:52:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 08:52:48,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:52:53,325 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 23594 treesize of output 23338 [2023-11-23 08:52:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:52:53,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:52:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 08:52:53,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177891583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:52:53,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 08:52:53,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 10] total 37 [2023-11-23 08:52:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816733097] [2023-11-23 08:52:53,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 08:52:53,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-23 08:52:53,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:52:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-23 08:52:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1195, Unknown=11, NotChecked=0, Total=1332 [2023-11-23 08:52:53,526 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 37 states, 32 states have (on average 4.625) internal successors, (148), 33 states have internal predecessors, (148), 20 states have call successors, (30), 5 states have call predecessors, (30), 11 states have return successors, (30), 18 states have call predecessors, (30), 19 states have call successors, (30) [2023-11-23 08:52:55,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:52:57,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:53:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:53:01,126 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2023-11-23 08:53:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 08:53:01,127 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 4.625) internal successors, (148), 33 states have internal predecessors, (148), 20 states have call successors, (30), 5 states have call predecessors, (30), 11 states have return successors, (30), 18 states have call predecessors, (30), 19 states have call successors, (30) Word has length 96 [2023-11-23 08:53:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:53:01,127 INFO L225 Difference]: With dead ends: 115 [2023-11-23 08:53:01,127 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 08:53:01,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=404, Invalid=2665, Unknown=11, NotChecked=0, Total=3080 [2023-11-23 08:53:01,128 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 273 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 81 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:53:01,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 96 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1336 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2023-11-23 08:53:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 08:53:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 08:53:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 08:53:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 08:53:01,129 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 96 [2023-11-23 08:53:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:53:01,129 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 08:53:01,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 4.625) internal successors, (148), 33 states have internal predecessors, (148), 20 states have call successors, (30), 5 states have call predecessors, (30), 11 states have return successors, (30), 18 states have call predecessors, (30), 19 states have call successors, (30) [2023-11-23 08:53:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 08:53:01,129 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 08:53:01,132 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 08:53:01,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 08:53:01,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-23 08:53:01,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-23 08:53:09,742 WARN L293 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 319 DAG size of output: 407 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15