./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_swap_contents_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_swap_contents_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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 08:55:07,570 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 08:55:07,635 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 08:55:07,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 08:55:07,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 08:55:07,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 08:55:07,685 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 08:55:07,685 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 08:55:07,685 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 08:55:07,685 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 08:55:07,686 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 08:55:07,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 08:55:07,686 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 08:55:07,686 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 08:55:07,687 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 08:55:07,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 08:55:07,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 08:55:07,687 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 08:55:07,688 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 08:55:07,688 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 08:55:07,688 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 08:55:07,689 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 08:55:07,689 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 08:55:07,689 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 08:55:07,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 08:55:07,690 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 08:55:07,690 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 08:55:07,690 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 08:55:07,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 08:55:07,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 08:55:07,695 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 08:55:07,695 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 08:55:07,695 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 08:55:07,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 08:55:07,696 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 08:55:07,696 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 08:55:07,696 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 08:55:07,696 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 08:55:07,697 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 08:55:07,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-23 08:55:07,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 08:55:07,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 08:55:07,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 08:55:07,923 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 08:55:07,923 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 08:55:07,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_swap_contents_harness.i [2023-11-23 08:55:08,997 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 08:55:09,296 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 08:55:09,297 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_swap_contents_harness.i [2023-11-23 08:55:09,324 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0060dc6a6/8a0f3d539e384efab5f9c25b1cedfddf/FLAG51212d410 [2023-11-23 08:55:09,340 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0060dc6a6/8a0f3d539e384efab5f9c25b1cedfddf [2023-11-23 08:55:09,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 08:55:09,346 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 08:55:09,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 08:55:09,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 08:55:09,350 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 08:55:09,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:55:09" (1/1) ... [2023-11-23 08:55:09,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66c2f7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:09, skipping insertion in model container [2023-11-23 08:55:09,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:55:09" (1/1) ... [2023-11-23 08:55:09,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 08:55:09,613 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_swap_contents_harness.i[4503,4516] [2023-11-23 08:55:09,619 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_swap_contents_harness.i[4563,4576] [2023-11-23 08:55:10,130 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,130 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,131 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,132 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,133 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,139 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,141 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,143 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,144 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,146 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,147 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,147 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,148 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,354 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 08:55:10,355 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 08:55:10,356 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 08:55:10,356 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 08:55:10,360 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 08:55:10,360 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 08:55:10,361 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 08:55:10,361 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 08:55:10,362 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 08:55:10,362 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 08:55:10,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 08:55:10,481 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 08:55:10,492 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_swap_contents_harness.i[4503,4516] [2023-11-23 08:55:10,492 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_swap_contents_harness.i[4563,4576] [2023-11-23 08:55:10,515 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,520 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,520 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,521 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,521 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,528 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,528 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,529 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,529 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,530 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:55:10,557 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 08:55:10,558 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 08:55:10,559 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 08:55:10,560 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 08:55:10,564 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 08:55:10,566 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 08:55:10,566 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 08:55:10,567 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 08:55:10,568 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 08:55:10,569 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 08:55:10,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 08:55:10,746 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,746 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,746 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,746 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,747 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,747 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,747 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,747 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,748 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,748 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,748 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,748 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,749 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,749 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,749 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,749 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:55:10,755 INFO L206 MainTranslator]: Completed translation [2023-11-23 08:55:10,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10 WrapperNode [2023-11-23 08:55:10,755 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 08:55:10,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 08:55:10,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 08:55:10,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 08:55:10,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,826 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,864 INFO L138 Inliner]: procedures = 678, calls = 1080, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 212 [2023-11-23 08:55:10,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 08:55:10,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 08:55:10,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 08:55:10,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 08:55:10,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,897 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,900 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,904 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 08:55:10,909 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 08:55:10,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 08:55:10,909 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 08:55:10,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (1/1) ... [2023-11-23 08:55:10,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 08:55:10,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:10,973 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 08:55:10,980 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 08:55:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2023-11-23 08:55:11,018 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2023-11-23 08:55:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 08:55:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 08:55:11,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 08:55:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-23 08:55:11,019 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-23 08:55:11,019 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2023-11-23 08:55:11,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2023-11-23 08:55:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 08:55:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-11-23 08:55:11,020 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-11-23 08:55:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 08:55:11,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 08:55:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 08:55:11,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 08:55:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2023-11-23 08:55:11,021 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2023-11-23 08:55:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 08:55:11,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 08:55:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 08:55:11,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 08:55:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 08:55:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 08:55:11,022 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 08:55:11,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 08:55:11,255 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 08:55:11,257 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 08:55:11,501 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 08:55:11,525 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 08:55:11,526 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 08:55:11,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:55:11 BoogieIcfgContainer [2023-11-23 08:55:11,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 08:55:11,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 08:55:11,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 08:55:11,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 08:55:11,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:55:09" (1/3) ... [2023-11-23 08:55:11,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eac39dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:55:11, skipping insertion in model container [2023-11-23 08:55:11,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:55:10" (2/3) ... [2023-11-23 08:55:11,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eac39dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:55:11, skipping insertion in model container [2023-11-23 08:55:11,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:55:11" (3/3) ... [2023-11-23 08:55:11,538 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2023-11-23 08:55:11,551 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 08:55:11,551 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 08:55:11,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 08:55:11,606 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;@6ab73c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 08:55:11,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 08:55:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 62 states have internal predecessors, (80), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 08:55:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 08:55:11,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:11,623 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:11,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:11,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:11,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1480360910, now seen corresponding path program 1 times [2023-11-23 08:55:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:11,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511737286] [2023-11-23 08:55:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 08:55:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-23 08:55:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 08:55:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 08:55:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-23 08:55:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 08:55:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-23 08:55:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 08:55:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:12,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511737286] [2023-11-23 08:55:12,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511737286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:12,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523319649] [2023-11-23 08:55:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:12,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:12,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:12,328 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 08:55:12,330 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 08:55:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:12,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 08:55:12,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-23 08:55:12,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:12,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523319649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:12,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-11-23 08:55:12,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193462362] [2023-11-23 08:55:12,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:12,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 08:55:12,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 08:55:12,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 08:55:12,672 INFO L87 Difference]: Start difference. First operand has 103 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 62 states have internal predecessors, (80), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 08:55:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:12,727 INFO L93 Difference]: Finished difference Result 204 states and 325 transitions. [2023-11-23 08:55:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 08:55:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 95 [2023-11-23 08:55:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:12,736 INFO L225 Difference]: With dead ends: 204 [2023-11-23 08:55:12,736 INFO L226 Difference]: Without dead ends: 99 [2023-11-23 08:55:12,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 08:55:12,746 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:12,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 08:55:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-23 08:55:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-23 08:55:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 60 states have internal predecessors, (73), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-23 08:55:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 139 transitions. [2023-11-23 08:55:12,777 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 139 transitions. Word has length 95 [2023-11-23 08:55:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:12,778 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 139 transitions. [2023-11-23 08:55:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 08:55:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 139 transitions. [2023-11-23 08:55:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 08:55:12,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:12,781 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:12,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 08:55:12,995 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,SelfDestructingSolverStorable0 [2023-11-23 08:55:12,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:12,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash 678232916, now seen corresponding path program 1 times [2023-11-23 08:55:12,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:12,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134370903] [2023-11-23 08:55:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:12,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 08:55:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-23 08:55:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 08:55:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 08:55:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-23 08:55:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 08:55:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-23 08:55:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 08:55:13,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:13,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134370903] [2023-11-23 08:55:13,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134370903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:13,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780739631] [2023-11-23 08:55:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:13,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:13,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:13,416 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 08:55:13,477 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 08:55:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:13,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 08:55:13,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-23 08:55:13,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:13,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780739631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:13,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:13,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2023-11-23 08:55:13,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471679181] [2023-11-23 08:55:13,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:13,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 08:55:13,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:13,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 08:55:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 08:55:13,699 INFO L87 Difference]: Start difference. First operand 99 states and 139 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 08:55:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:13,743 INFO L93 Difference]: Finished difference Result 195 states and 287 transitions. [2023-11-23 08:55:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:55:13,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 95 [2023-11-23 08:55:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:13,745 INFO L225 Difference]: With dead ends: 195 [2023-11-23 08:55:13,745 INFO L226 Difference]: Without dead ends: 111 [2023-11-23 08:55:13,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 08:55:13,747 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 21 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:13,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 383 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 08:55:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-23 08:55:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2023-11-23 08:55:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 58 states have (on average 1.293103448275862) internal successors, (75), 62 states have internal predecessors, (75), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-23 08:55:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2023-11-23 08:55:13,755 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 95 [2023-11-23 08:55:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:13,756 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2023-11-23 08:55:13,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 08:55:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2023-11-23 08:55:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 08:55:13,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:13,758 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:13,782 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 08:55:13,971 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,SelfDestructingSolverStorable1 [2023-11-23 08:55:13,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:13,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1920744854, now seen corresponding path program 1 times [2023-11-23 08:55:13,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:13,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141029401] [2023-11-23 08:55:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:13,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 08:55:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-23 08:55:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 08:55:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 08:55:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-23 08:55:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 08:55:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-23 08:55:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-23 08:55:14,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:14,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141029401] [2023-11-23 08:55:14,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141029401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:14,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160707781] [2023-11-23 08:55:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:14,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:14,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:14,236 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 08:55:14,263 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 08:55:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 08:55:14,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-23 08:55:14,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160707781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:14,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:14,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2023-11-23 08:55:14,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076089687] [2023-11-23 08:55:14,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:14,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 08:55:14,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 08:55:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 08:55:14,478 INFO L87 Difference]: Start difference. First operand 101 states and 141 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 08:55:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:14,518 INFO L93 Difference]: Finished difference Result 195 states and 285 transitions. [2023-11-23 08:55:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:55:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 95 [2023-11-23 08:55:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:14,519 INFO L225 Difference]: With dead ends: 195 [2023-11-23 08:55:14,520 INFO L226 Difference]: Without dead ends: 109 [2023-11-23 08:55:14,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 08:55:14,521 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 12 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:14,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 380 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 08:55:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-23 08:55:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2023-11-23 08:55:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 64 states have internal predecessors, (77), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-23 08:55:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 143 transitions. [2023-11-23 08:55:14,541 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 143 transitions. Word has length 95 [2023-11-23 08:55:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:14,542 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 143 transitions. [2023-11-23 08:55:14,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 08:55:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 143 transitions. [2023-11-23 08:55:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 08:55:14,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:14,543 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:14,556 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 08:55:14,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:14,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:14,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash 943267928, now seen corresponding path program 1 times [2023-11-23 08:55:14,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:14,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636910004] [2023-11-23 08:55:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:14,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 08:55:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-23 08:55:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 08:55:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 08:55:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-23 08:55:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 08:55:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-23 08:55:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-23 08:55:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636910004] [2023-11-23 08:55:14,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636910004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209327739] [2023-11-23 08:55:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:14,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:14,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:14,994 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 08:55:15,021 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 08:55:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 08:55:15,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-23 08:55:15,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:15,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209327739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:15,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:15,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2023-11-23 08:55:15,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288372106] [2023-11-23 08:55:15,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:15,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 08:55:15,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 08:55:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 08:55:15,249 INFO L87 Difference]: Start difference. First operand 103 states and 143 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 08:55:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:15,295 INFO L93 Difference]: Finished difference Result 195 states and 283 transitions. [2023-11-23 08:55:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:55:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 95 [2023-11-23 08:55:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:15,297 INFO L225 Difference]: With dead ends: 195 [2023-11-23 08:55:15,297 INFO L226 Difference]: Without dead ends: 107 [2023-11-23 08:55:15,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 08:55:15,298 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 3 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:15,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 379 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 08:55:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-23 08:55:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2023-11-23 08:55:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 67 states have internal predecessors, (80), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-23 08:55:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 146 transitions. [2023-11-23 08:55:15,304 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 146 transitions. Word has length 95 [2023-11-23 08:55:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:15,304 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 146 transitions. [2023-11-23 08:55:15,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 08:55:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 146 transitions. [2023-11-23 08:55:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 08:55:15,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:15,306 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:15,318 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 08:55:15,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:15,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:15,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2114729062, now seen corresponding path program 1 times [2023-11-23 08:55:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:15,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581196444] [2023-11-23 08:55:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:15,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 08:55:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-23 08:55:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 08:55:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 08:55:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-23 08:55:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 08:55:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-23 08:55:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 08:55:15,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581196444] [2023-11-23 08:55:15,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581196444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390864555] [2023-11-23 08:55:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:15,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:15,793 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 08:55:15,817 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 08:55:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 08:55:16,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-23 08:55:16,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390864555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:16,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:16,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-23 08:55:16,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078240193] [2023-11-23 08:55:16,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:16,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 08:55:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:16,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 08:55:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:55:16,113 INFO L87 Difference]: Start difference. First operand 106 states and 146 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 08:55:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:16,233 INFO L93 Difference]: Finished difference Result 204 states and 286 transitions. [2023-11-23 08:55:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 08:55:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 95 [2023-11-23 08:55:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:16,236 INFO L225 Difference]: With dead ends: 204 [2023-11-23 08:55:16,236 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 08:55:16,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 08:55:16,238 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 26 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:16,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 418 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:55:16,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 08:55:16,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-23 08:55:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 74 states have internal predecessors, (86), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (36), 32 states have call predecessors, (36), 32 states have call successors, (36) [2023-11-23 08:55:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2023-11-23 08:55:16,246 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 156 transitions. Word has length 95 [2023-11-23 08:55:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:16,246 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 156 transitions. [2023-11-23 08:55:16,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 08:55:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 156 transitions. [2023-11-23 08:55:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 08:55:16,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:16,247 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:16,263 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 08:55:16,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:16,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:16,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1034413414, now seen corresponding path program 1 times [2023-11-23 08:55:16,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:16,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676107274] [2023-11-23 08:55:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:16,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 08:55:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-23 08:55:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 08:55:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 08:55:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-23 08:55:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 08:55:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-23 08:55:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 08:55:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676107274] [2023-11-23 08:55:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676107274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841103353] [2023-11-23 08:55:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:16,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:16,834 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 08:55:16,860 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 08:55:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 08:55:17,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 08:55:17,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841103353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-23 08:55:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145246007] [2023-11-23 08:55:17,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 08:55:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 08:55:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:55:17,162 INFO L87 Difference]: Start difference. First operand 113 states and 156 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 08:55:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:17,289 INFO L93 Difference]: Finished difference Result 208 states and 287 transitions. [2023-11-23 08:55:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 08:55:17,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 95 [2023-11-23 08:55:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:17,290 INFO L225 Difference]: With dead ends: 208 [2023-11-23 08:55:17,290 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 08:55:17,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-23 08:55:17,291 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 25 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:17,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 544 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 08:55:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 08:55:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-23 08:55:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 74 states have internal predecessors, (86), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2023-11-23 08:55:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2023-11-23 08:55:17,297 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 95 [2023-11-23 08:55:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:17,298 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2023-11-23 08:55:17,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 08:55:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2023-11-23 08:55:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 08:55:17,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:17,299 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:17,327 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 08:55:17,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:17,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:17,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 625168786, now seen corresponding path program 1 times [2023-11-23 08:55:17,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:17,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892324953] [2023-11-23 08:55:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:17,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 08:55:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-23 08:55:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 08:55:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 08:55:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-23 08:55:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 08:55:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-23 08:55:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-23 08:55:17,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892324953] [2023-11-23 08:55:17,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892324953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579256003] [2023-11-23 08:55:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:17,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:17,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:17,912 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 08:55:17,937 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 08:55:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:18,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 08:55:18,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:18,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 08:55:18,288 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 16 treesize of output 17 [2023-11-23 08:55:18,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-23 08:55:18,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-23 08:55:18,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-23 08:55:19,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 08:55:19,073 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 24 treesize of output 10 [2023-11-23 08:55:19,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 08:55:19,077 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 26 treesize of output 12 [2023-11-23 08:55:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 08:55:19,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:55:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579256003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:21,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:55:21,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 20 [2023-11-23 08:55:21,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467433972] [2023-11-23 08:55:21,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:55:21,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 08:55:21,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 08:55:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=433, Unknown=13, NotChecked=0, Total=506 [2023-11-23 08:55:21,294 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 20 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 9 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2023-11-23 08:55:24,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:55:26,679 WARN L539 Checker$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 08:55:29,519 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 08:55:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:30,076 INFO L93 Difference]: Finished difference Result 333 states and 471 transitions. [2023-11-23 08:55:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 08:55:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 9 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 95 [2023-11-23 08:55:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:30,078 INFO L225 Difference]: With dead ends: 333 [2023-11-23 08:55:30,078 INFO L226 Difference]: Without dead ends: 224 [2023-11-23 08:55:30,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=216, Invalid=1493, Unknown=13, NotChecked=0, Total=1722 [2023-11-23 08:55:30,080 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 191 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 148 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:30,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 712 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1921 Invalid, 3 Unknown, 0 Unchecked, 8.2s Time] [2023-11-23 08:55:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-23 08:55:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2023-11-23 08:55:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 132 states have (on average 1.2575757575757576) internal successors, (166), 140 states have internal predecessors, (166), 69 states have call successors, (69), 16 states have call predecessors, (69), 18 states have return successors, (81), 63 states have call predecessors, (81), 65 states have call successors, (81) [2023-11-23 08:55:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 316 transitions. [2023-11-23 08:55:30,098 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 316 transitions. Word has length 95 [2023-11-23 08:55:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:30,098 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 316 transitions. [2023-11-23 08:55:30,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 9 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2023-11-23 08:55:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 316 transitions. [2023-11-23 08:55:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-23 08:55:30,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:30,099 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:30,112 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 08:55:30,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:30,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:30,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2063675182, now seen corresponding path program 1 times [2023-11-23 08:55:30,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:30,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983881322] [2023-11-23 08:55:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:30,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 08:55:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-23 08:55:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-23 08:55:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 08:55:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-23 08:55:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-23 08:55:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-23 08:55:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 08:55:30,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983881322] [2023-11-23 08:55:30,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983881322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273600775] [2023-11-23 08:55:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:30,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:30,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:30,638 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 08:55:30,660 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 08:55:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:30,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 08:55:30,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 08:55:31,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273600775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:31,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:31,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-23 08:55:31,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809104129] [2023-11-23 08:55:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:31,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 08:55:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 08:55:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-23 08:55:31,049 INFO L87 Difference]: Start difference. First operand 220 states and 316 transitions. Second operand has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 08:55:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:31,340 INFO L93 Difference]: Finished difference Result 417 states and 611 transitions. [2023-11-23 08:55:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 08:55:31,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2023-11-23 08:55:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:31,343 INFO L225 Difference]: With dead ends: 417 [2023-11-23 08:55:31,343 INFO L226 Difference]: Without dead ends: 226 [2023-11-23 08:55:31,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-23 08:55:31,345 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 53 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:31,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 566 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:55:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-23 08:55:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-11-23 08:55:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 136 states have (on average 1.25) internal successors, (170), 146 states have internal predecessors, (170), 69 states have call successors, (69), 16 states have call predecessors, (69), 20 states have return successors, (89), 63 states have call predecessors, (89), 65 states have call successors, (89) [2023-11-23 08:55:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 328 transitions. [2023-11-23 08:55:31,381 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 328 transitions. Word has length 98 [2023-11-23 08:55:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:31,381 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 328 transitions. [2023-11-23 08:55:31,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 08:55:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 328 transitions. [2023-11-23 08:55:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 08:55:31,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:31,383 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:31,396 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 08:55:31,596 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,SelfDestructingSolverStorable7 [2023-11-23 08:55:31,597 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:31,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1303872517, now seen corresponding path program 1 times [2023-11-23 08:55:31,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:31,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407435028] [2023-11-23 08:55:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:31,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 08:55:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-23 08:55:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-23 08:55:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-23 08:55:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-23 08:55:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-23 08:55:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-23 08:55:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 08:55:31,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:31,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407435028] [2023-11-23 08:55:31,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407435028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:31,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034165041] [2023-11-23 08:55:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:31,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:31,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:31,928 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 08:55:31,936 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 08:55:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:32,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 08:55:32,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 08:55:32,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:32,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034165041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:32,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:32,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2023-11-23 08:55:32,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581063422] [2023-11-23 08:55:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 08:55:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 08:55:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-23 08:55:32,364 INFO L87 Difference]: Start difference. First operand 226 states and 328 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 08:55:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:32,651 INFO L93 Difference]: Finished difference Result 443 states and 657 transitions. [2023-11-23 08:55:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 08:55:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 100 [2023-11-23 08:55:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:32,653 INFO L225 Difference]: With dead ends: 443 [2023-11-23 08:55:32,653 INFO L226 Difference]: Without dead ends: 246 [2023-11-23 08:55:32,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-23 08:55:32,654 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 77 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:32,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 654 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:55:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-23 08:55:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 230. [2023-11-23 08:55:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 140 states have (on average 1.2571428571428571) internal successors, (176), 150 states have internal predecessors, (176), 69 states have call successors, (69), 16 states have call predecessors, (69), 20 states have return successors, (89), 63 states have call predecessors, (89), 65 states have call successors, (89) [2023-11-23 08:55:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 334 transitions. [2023-11-23 08:55:32,677 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 334 transitions. Word has length 100 [2023-11-23 08:55:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:32,678 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 334 transitions. [2023-11-23 08:55:32,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 08:55:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 334 transitions. [2023-11-23 08:55:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-23 08:55:32,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:32,680 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:32,695 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 08:55:32,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:32,893 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:32,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:32,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2071325539, now seen corresponding path program 1 times [2023-11-23 08:55:32,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:32,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747131826] [2023-11-23 08:55:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:32,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 08:55:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-23 08:55:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 08:55:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-23 08:55:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 08:55:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-23 08:55:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-23 08:55:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 08:55:33,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:33,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747131826] [2023-11-23 08:55:33,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747131826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:33,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162706609] [2023-11-23 08:55:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:33,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:33,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:33,218 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:55:33,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 08:55:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:33,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 08:55:33,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-23 08:55:33,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:33,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162706609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:33,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:33,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 08:55:33,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744415421] [2023-11-23 08:55:33,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:33,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 08:55:33,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 08:55:33,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 08:55:33,575 INFO L87 Difference]: Start difference. First operand 230 states and 334 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 08:55:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:33,610 INFO L93 Difference]: Finished difference Result 441 states and 664 transitions. [2023-11-23 08:55:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 08:55:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2023-11-23 08:55:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:33,611 INFO L225 Difference]: With dead ends: 441 [2023-11-23 08:55:33,611 INFO L226 Difference]: Without dead ends: 240 [2023-11-23 08:55:33,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 08:55:33,613 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 4 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:33,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 250 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 08:55:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-23 08:55:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 232. [2023-11-23 08:55:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 142 states have (on average 1.2535211267605635) internal successors, (178), 152 states have internal predecessors, (178), 69 states have call successors, (69), 16 states have call predecessors, (69), 20 states have return successors, (89), 63 states have call predecessors, (89), 65 states have call successors, (89) [2023-11-23 08:55:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 336 transitions. [2023-11-23 08:55:33,631 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 336 transitions. Word has length 101 [2023-11-23 08:55:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:33,632 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 336 transitions. [2023-11-23 08:55:33,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 08:55:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 336 transitions. [2023-11-23 08:55:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 08:55:33,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:33,633 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:33,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 08:55:33,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 08:55:33,846 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:33,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:33,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1078282009, now seen corresponding path program 1 times [2023-11-23 08:55:33,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:33,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646320019] [2023-11-23 08:55:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:33,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 08:55:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-23 08:55:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:55:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-23 08:55:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-23 08:55:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-23 08:55:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-23 08:55:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-23 08:55:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-23 08:55:34,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:34,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646320019] [2023-11-23 08:55:34,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646320019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:34,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950382480] [2023-11-23 08:55:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:34,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:34,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:34,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:55:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 08:55:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:34,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 08:55:34,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:34,724 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 16 treesize of output 17 [2023-11-23 08:55:34,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-23 08:55:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 08:55:36,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:55:36,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950382480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:55:36,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:55:36,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8] total 21 [2023-11-23 08:55:36,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101900781] [2023-11-23 08:55:36,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:55:36,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 08:55:36,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:36,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 08:55:36,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2023-11-23 08:55:36,197 INFO L87 Difference]: Start difference. First operand 232 states and 336 transitions. Second operand has 15 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 12 states have internal predecessors, (63), 7 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-23 08:55:37,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:55:37,514 INFO L93 Difference]: Finished difference Result 462 states and 640 transitions. [2023-11-23 08:55:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 08:55:37,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 12 states have internal predecessors, (63), 7 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) Word has length 108 [2023-11-23 08:55:37,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:55:37,516 INFO L225 Difference]: With dead ends: 462 [2023-11-23 08:55:37,516 INFO L226 Difference]: Without dead ends: 279 [2023-11-23 08:55:37,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-11-23 08:55:37,517 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 51 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 08:55:37,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1010 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 08:55:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-23 08:55:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 274. [2023-11-23 08:55:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 177 states have (on average 1.2542372881355932) internal successors, (222), 187 states have internal predecessors, (222), 72 states have call successors, (72), 21 states have call predecessors, (72), 24 states have return successors, (85), 65 states have call predecessors, (85), 68 states have call successors, (85) [2023-11-23 08:55:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 379 transitions. [2023-11-23 08:55:37,536 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 379 transitions. Word has length 108 [2023-11-23 08:55:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:55:37,537 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 379 transitions. [2023-11-23 08:55:37,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 12 states have internal predecessors, (63), 7 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-23 08:55:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 379 transitions. [2023-11-23 08:55:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-23 08:55:37,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:55:37,538 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:55:37,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 08:55:37,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 08:55:37,753 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:55:37,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:55:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash -884280563, now seen corresponding path program 2 times [2023-11-23 08:55:37,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:55:37,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341711182] [2023-11-23 08:55:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:55:37,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:55:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:37,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:37,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:37,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:37,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 08:55:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:37,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:37,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:55:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:37,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:55:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:38,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:55:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:38,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-23 08:55:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:38,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-23 08:55:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:38,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-23 08:55:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:38,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-23 08:55:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:38,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:55:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:38,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-23 08:55:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:55:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 08:55:38,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:55:38,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341711182] [2023-11-23 08:55:38,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341711182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:38,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468172131] [2023-11-23 08:55:38,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 08:55:38,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:55:38,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:55:38,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:55:38,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 08:55:38,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 08:55:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:55:38,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 156 conjunts are in the unsatisfiable core [2023-11-23 08:55:38,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:55:38,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 08:55:38,746 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 27 treesize of output 7 [2023-11-23 08:55:38,750 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 11 treesize of output 7 [2023-11-23 08:55:38,772 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-23 08:55:38,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2023-11-23 08:55:38,788 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-23 08:55:38,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 13 [2023-11-23 08:55:38,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 08:55:39,001 INFO L349 Elim1Store]: treesize reduction 226, result has 36.0 percent of original size [2023-11-23 08:55:39,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 183 treesize of output 205 [2023-11-23 08:55:39,059 INFO L349 Elim1Store]: treesize reduction 236, result has 14.5 percent of original size [2023-11-23 08:55:39,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 145 treesize of output 95 [2023-11-23 08:55:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,434 INFO L349 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2023-11-23 08:55:39,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 94 treesize of output 47 [2023-11-23 08:55:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,441 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 08:55:39,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 18 [2023-11-23 08:55:39,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 08:55:39,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-11-23 08:55:39,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-11-23 08:55:39,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 08:55:39,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 43 [2023-11-23 08:55:39,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,939 INFO L349 Elim1Store]: treesize reduction 57, result has 8.1 percent of original size [2023-11-23 08:55:39,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 135 treesize of output 125 [2023-11-23 08:55:39,954 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-11-23 08:55:39,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2023-11-23 08:55:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 137 [2023-11-23 08:55:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:39,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 29 [2023-11-23 08:55:40,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-23 08:55:40,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-23 08:55:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:42,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:55:42,640 INFO L349 Elim1Store]: treesize reduction 1270, result has 0.1 percent of original size [2023-11-23 08:55:42,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 3 disjoint index pairs (out of 105 index pairs), introduced 20 new quantified variables, introduced 101 case distinctions, treesize of input 328 treesize of output 1 [2023-11-23 08:55:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 08:55:42,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:55:43,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 08:55:43,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 135 [2023-11-23 08:55:43,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 08:55:43,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 141 [2023-11-23 08:55:43,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468172131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:55:43,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:55:43,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 24] total 31 [2023-11-23 08:55:43,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515046328] [2023-11-23 08:55:43,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:55:43,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 08:55:43,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:55:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 08:55:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2023-11-23 08:55:43,965 INFO L87 Difference]: Start difference. First operand 274 states and 379 transitions. Second operand has 31 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 9 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-23 08:55:49,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:56:04,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:56:11,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:56:13,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:56:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:56:18,639 INFO L93 Difference]: Finished difference Result 631 states and 895 transitions. [2023-11-23 08:56:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-23 08:56:18,639 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 9 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 109 [2023-11-23 08:56:18,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:56:18,641 INFO L225 Difference]: With dead ends: 631 [2023-11-23 08:56:18,641 INFO L226 Difference]: Without dead ends: 383 [2023-11-23 08:56:18,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=477, Invalid=4634, Unknown=1, NotChecked=0, Total=5112 [2023-11-23 08:56:18,644 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 200 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 3701 mSolverCounterSat, 117 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 3822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3701 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2023-11-23 08:56:18,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 736 Invalid, 3822 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [117 Valid, 3701 Invalid, 4 Unknown, 0 Unchecked, 24.7s Time] [2023-11-23 08:56:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-11-23 08:56:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 334. [2023-11-23 08:56:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 221 states have (on average 1.262443438914027) internal successors, (279), 233 states have internal predecessors, (279), 82 states have call successors, (82), 26 states have call predecessors, (82), 30 states have return successors, (101), 74 states have call predecessors, (101), 78 states have call successors, (101) [2023-11-23 08:56:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 462 transitions. [2023-11-23 08:56:18,680 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 462 transitions. Word has length 109 [2023-11-23 08:56:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:56:18,680 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 462 transitions. [2023-11-23 08:56:18,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 9 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-23 08:56:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 462 transitions. [2023-11-23 08:56:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-23 08:56:18,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:56:18,682 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:56:18,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 08:56:18,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 08:56:18,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:56:18,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:56:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash 830735232, now seen corresponding path program 1 times [2023-11-23 08:56:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:56:18,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422283637] [2023-11-23 08:56:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:56:18,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:56:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:56:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:56:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:56:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 08:56:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:56:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:56:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:56:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:56:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-23 08:56:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-23 08:56:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-23 08:56:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-23 08:56:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:56:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-23 08:56:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-23 08:56:19,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:56:19,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422283637] [2023-11-23 08:56:19,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422283637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:56:19,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041119534] [2023-11-23 08:56:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:56:19,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:56:19,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:56:19,794 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:56:19,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 08:56:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:56:20,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-23 08:56:20,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:56:20,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 08:56:20,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 08:56:20,686 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 08:56:20,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 08:56:20,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 08:56:21,090 INFO L349 Elim1Store]: treesize reduction 74, result has 32.1 percent of original size [2023-11-23 08:56:21,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 54 [2023-11-23 08:56:21,504 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-23 08:56:21,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 19 [2023-11-23 08:56:27,867 INFO L349 Elim1Store]: treesize reduction 397, result has 10.2 percent of original size [2023-11-23 08:56:27,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 149 treesize of output 354 [2023-11-23 08:56:29,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 08:56:30,864 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-23 08:56:30,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-23 08:56:30,965 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-23 08:56:30,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-23 08:56:31,070 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-23 08:56:31,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-23 08:56:31,152 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-23 08:56:31,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-23 08:56:31,899 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-23 08:56:31,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-23 08:56:31,984 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-23 08:56:31,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-23 08:56:32,069 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-23 08:56:32,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-23 08:56:32,169 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-23 08:56:32,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 11 [2023-11-23 08:56:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:56:32,995 INFO L349 Elim1Store]: treesize reduction 50, result has 26.5 percent of original size [2023-11-23 08:56:32,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 316 treesize of output 312 [2023-11-23 08:56:33,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 08:56:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:56:33,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:56:33,634 INFO L349 Elim1Store]: treesize reduction 92, result has 11.5 percent of original size [2023-11-23 08:56:33,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 95 [2023-11-23 08:56:33,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 08:56:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 47 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 08:56:51,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:57:00,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041119534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:57:00,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:57:00,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 21] total 28 [2023-11-23 08:57:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824546332] [2023-11-23 08:57:00,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:57:00,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 08:57:00,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:57:00,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 08:57:00,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1133, Unknown=20, NotChecked=0, Total=1260 [2023-11-23 08:57:00,547 INFO L87 Difference]: Start difference. First operand 334 states and 462 transitions. Second operand has 28 states, 23 states have (on average 4.434782608695652) internal successors, (102), 24 states have internal predecessors, (102), 9 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-23 08:57:04,254 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 08:57:08,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:12,860 WARN L539 Checker$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 08:57:15,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:17,026 WARN L539 Checker$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 08:57:19,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:21,312 WARN L539 Checker$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 08:57:23,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:25,380 WARN L539 Checker$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 08:57:27,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:32,276 WARN L539 Checker$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 08:57:34,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:36,351 WARN L539 Checker$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 08:57:38,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:42,565 WARN L539 Checker$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 08:57:44,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:46,767 WARN L539 Checker$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 08:57:48,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:56,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:57:58,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:01,050 WARN L539 Checker$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 08:58:03,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:11,174 WARN L539 Checker$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 08:58:13,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:17,790 WARN L539 Checker$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 08:58:21,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:24,093 WARN L539 Checker$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 08:58:26,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:29,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:30,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:34,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:36,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:38,889 WARN L539 Checker$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 08:58:41,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:43,532 WARN L539 Checker$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 08:58:45,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:48,152 WARN L539 Checker$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 08:58:51,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:53,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:58:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:58:56,458 INFO L93 Difference]: Finished difference Result 765 states and 1085 transitions. [2023-11-23 08:58:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-23 08:58:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 4.434782608695652) internal successors, (102), 24 states have internal predecessors, (102), 9 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 111 [2023-11-23 08:58:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:58:56,461 INFO L225 Difference]: With dead ends: 765 [2023-11-23 08:58:56,461 INFO L226 Difference]: Without dead ends: 466 [2023-11-23 08:58:56,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=402, Invalid=2997, Unknown=23, NotChecked=0, Total=3422 [2023-11-23 08:58:56,464 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 234 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 3175 mSolverCounterSat, 91 mSolverCounterUnsat, 39 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3175 IncrementalHoareTripleChecker+Invalid, 39 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.7s IncrementalHoareTripleChecker+Time [2023-11-23 08:58:56,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 778 Invalid, 3305 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [91 Valid, 3175 Invalid, 39 Unknown, 0 Unchecked, 103.7s Time] [2023-11-23 08:58:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-23 08:58:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 409. [2023-11-23 08:58:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 273 states have (on average 1.2527472527472527) internal successors, (342), 286 states have internal predecessors, (342), 98 states have call successors, (98), 34 states have call predecessors, (98), 37 states have return successors, (118), 88 states have call predecessors, (118), 94 states have call successors, (118) [2023-11-23 08:58:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 558 transitions. [2023-11-23 08:58:56,504 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 558 transitions. Word has length 111 [2023-11-23 08:58:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:58:56,505 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 558 transitions. [2023-11-23 08:58:56,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 4.434782608695652) internal successors, (102), 24 states have internal predecessors, (102), 9 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-23 08:58:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 558 transitions. [2023-11-23 08:58:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-23 08:58:56,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:58:56,506 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-23 08:58:56,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-23 08:58:56,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 08:58:56,721 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:58:56,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:58:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash 441287810, now seen corresponding path program 1 times [2023-11-23 08:58:56,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:58:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518251931] [2023-11-23 08:58:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:56,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:58:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:58:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:58:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:58:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 08:58:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:58:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:58:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 08:58:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-23 08:58:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-23 08:58:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-23 08:58:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-23 08:58:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-23 08:58:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:58:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-11-23 08:58:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 08:58:57,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:58:57,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518251931] [2023-11-23 08:58:57,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518251931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:58:57,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466686571] [2023-11-23 08:58:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:58:57,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:58:57,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:58:57,384 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:58:57,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 08:58:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:58:57,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-23 08:58:57,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:58:57,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 08:58:58,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 08:58:58,382 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 08:58:58,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 08:58:58,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 08:58:58,820 INFO L349 Elim1Store]: treesize reduction 42, result has 31.1 percent of original size [2023-11-23 08:58:58,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 101 [2023-11-23 08:58:58,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2023-11-23 08:58:58,883 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 08:58:59,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2023-11-23 08:58:59,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 08:58:59,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:58:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:58:59,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2023-11-23 08:59:00,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-11-23 08:59:05,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:59:05,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:59:06,846 INFO L349 Elim1Store]: treesize reduction 389, result has 10.4 percent of original size [2023-11-23 08:59:06,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 136 treesize of output 344 [2023-11-23 08:59:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:59:12,465 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 08:59:12,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 220 [2023-11-23 08:59:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:59:12,578 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 08:59:12,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 220 [2023-11-23 08:59:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:59:12,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:59:12,742 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 08:59:12,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 124 [2023-11-23 08:59:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:59:12,840 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 08:59:12,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 220 [2023-11-23 08:59:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 47 proven. 14 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 08:59:23,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:59:34,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466686571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:59:34,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:59:34,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21] total 26 [2023-11-23 08:59:34,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324293489] [2023-11-23 08:59:34,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:59:34,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 08:59:34,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:59:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 08:59:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1002, Unknown=18, NotChecked=0, Total=1122 [2023-11-23 08:59:34,133 INFO L87 Difference]: Start difference. First operand 409 states and 558 transitions. Second operand has 26 states, 20 states have (on average 5.1) internal successors, (102), 21 states have internal predecessors, (102), 9 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Killed by 15