./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_hash_iter_next_harness_negated.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_hash_iter_next_harness_negated.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 60c6b7f7f10f0b58422dda68af0c160071220e1df94b065f3ff541927c670dfd --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 08:38:06,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 08:38:06,281 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 08:38:06,285 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 08:38:06,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 08:38:06,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 08:38:06,319 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 08:38:06,320 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 08:38:06,320 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 08:38:06,324 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 08:38:06,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 08:38:06,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 08:38:06,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 08:38:06,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 08:38:06,327 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 08:38:06,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 08:38:06,327 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 08:38:06,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 08:38:06,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 08:38:06,328 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 08:38:06,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 08:38:06,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 08:38:06,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 08:38:06,329 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 08:38:06,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 08:38:06,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 08:38:06,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 08:38:06,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 08:38:06,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 08:38:06,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 08:38:06,332 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 08:38:06,332 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 08:38:06,333 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 08:38:06,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 08:38:06,333 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 08:38:06,333 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 08:38:06,333 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 08:38:06,334 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 08:38:06,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 08:38:06,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60c6b7f7f10f0b58422dda68af0c160071220e1df94b065f3ff541927c670dfd Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-23 08:38:06,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 08:38:06,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 08:38:06,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 08:38:06,610 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 08:38:06,611 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 08:38:06,612 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_hash_iter_next_harness_negated.i [2023-11-23 08:38:07,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 08:38:08,255 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 08:38:08,256 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_hash_iter_next_harness_negated.i [2023-11-23 08:38:08,293 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bbf99b9/b46ef2b302f0488b8156907131b00e55/FLAG4de0c845b [2023-11-23 08:38:08,307 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bbf99b9/b46ef2b302f0488b8156907131b00e55 [2023-11-23 08:38:08,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 08:38:08,313 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 08:38:08,316 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 08:38:08,316 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 08:38:08,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 08:38:08,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:08" (1/1) ... [2023-11-23 08:38:08,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f17405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:08, skipping insertion in model container [2023-11-23 08:38:08,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:08" (1/1) ... [2023-11-23 08:38:08,418 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 08:38:08,742 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_hash_iter_next_harness_negated.i[4492,4505] [2023-11-23 08:38:08,753 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_hash_iter_next_harness_negated.i[4552,4565] [2023-11-23 08:38:09,637 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,638 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,638 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,639 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,640 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,656 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,657 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,659 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,659 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,662 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,663 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,664 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:09,664 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,137 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 08:38:10,138 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 08:38:10,139 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 08:38:10,140 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 08:38:10,141 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 08:38:10,142 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 08:38:10,142 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 08:38:10,143 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 08:38:10,143 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 08:38:10,144 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 08:38:10,533 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,533 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,555 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,556 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,561 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,562 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,578 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,581 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,582 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,583 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,583 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,584 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,584 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 08:38:10,683 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 08:38:10,718 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_hash_iter_next_harness_negated.i[4492,4505] [2023-11-23 08:38:10,718 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_hash_iter_next_harness_negated.i[4552,4565] [2023-11-23 08:38:10,822 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,824 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,824 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,825 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,825 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,837 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,839 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,840 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,840 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,841 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,842 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,842 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,842 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:10,899 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 08:38:10,900 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 08:38:10,900 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 08:38:10,901 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 08:38:10,902 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 08:38:10,902 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 08:38:10,903 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 08:38:10,903 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 08:38:10,903 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 08:38:10,904 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 08:38:10,961 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7526-7537] [2023-11-23 08:38:11,183 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,184 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,190 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,192 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,194 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,194 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,205 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,206 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,207 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,207 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,207 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,208 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,210 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 08:38:11,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 08:38:11,617 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,618 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,618 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,618 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,618 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,618 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,618 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,618 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,619 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,619 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,619 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,619 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,619 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,619 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,619 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,619 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,620 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,620 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 08:38:11,646 INFO L206 MainTranslator]: Completed translation [2023-11-23 08:38:11,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11 WrapperNode [2023-11-23 08:38:11,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 08:38:11,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 08:38:11,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 08:38:11,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 08:38:11,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,775 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,883 INFO L138 Inliner]: procedures = 772, calls = 2453, calls flagged for inlining = 67, calls inlined = 11, statements flattened = 643 [2023-11-23 08:38:11,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 08:38:11,885 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 08:38:11,886 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 08:38:11,886 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 08:38:11,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,906 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,965 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 08:38:11,966 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 08:38:11,966 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 08:38:11,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 08:38:11,970 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (1/1) ... [2023-11-23 08:38:11,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 08:38:11,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:38:12,006 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 08:38:12,036 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 08:38:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-23 08:38:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 08:38:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 08:38:12,067 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 08:38:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 08:38:12,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 08:38:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-23 08:38:12,068 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-23 08:38:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 08:38:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 08:38:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_next [2023-11-23 08:38:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_next [2023-11-23 08:38:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 08:38:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 08:38:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 08:38:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 08:38:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 08:38:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 08:38:12,070 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 08:38:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 08:38:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-23 08:38:12,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-23 08:38:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 08:38:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 08:38:12,072 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 08:38:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 08:38:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-23 08:38:12,072 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-23 08:38:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 08:38:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-23 08:38:12,072 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-23 08:38:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2023-11-23 08:38:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2023-11-23 08:38:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 08:38:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 08:38:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-23 08:38:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-23 08:38:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-23 08:38:12,074 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-23 08:38:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 08:38:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 08:38:12,074 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 08:38:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-23 08:38:12,075 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-23 08:38:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 08:38:12,429 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 08:38:12,432 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 08:38:13,189 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 08:38:13,285 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 08:38:13,286 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 08:38:13,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:13 BoogieIcfgContainer [2023-11-23 08:38:13,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 08:38:13,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 08:38:13,288 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 08:38:13,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 08:38:13,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:08" (1/3) ... [2023-11-23 08:38:13,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56dc6c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:13, skipping insertion in model container [2023-11-23 08:38:13,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:11" (2/3) ... [2023-11-23 08:38:13,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56dc6c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:13, skipping insertion in model container [2023-11-23 08:38:13,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:13" (3/3) ... [2023-11-23 08:38:13,294 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_next_harness_negated.i [2023-11-23 08:38:13,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 08:38:13,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 08:38:13,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 08:38:13,360 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;@48d4867d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 08:38:13,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 08:38:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 91 states have internal predecessors, (119), 43 states have call successors, (43), 16 states have call predecessors, (43), 16 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-23 08:38:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-23 08:38:13,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:38:13,387 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:38:13,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:38:13,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:38:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash 540065121, now seen corresponding path program 1 times [2023-11-23 08:38:13,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:38:13,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80156938] [2023-11-23 08:38:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:13,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:38:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:14,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:38:14,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80156938] [2023-11-23 08:38:14,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:38:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109012538] [2023-11-23 08:38:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:14,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:38:14,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:38:14,224 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 08:38:14,253 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 08:38:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:15,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 08:38:15,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:38:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-11-23 08:38:15,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:38:15,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109012538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:38:15,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:38:15,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 08:38:15,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148161756] [2023-11-23 08:38:15,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:38:15,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 08:38:15,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:38:15,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 08:38:15,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 08:38:15,406 INFO L87 Difference]: Start difference. First operand has 151 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 91 states have internal predecessors, (119), 43 states have call successors, (43), 16 states have call predecessors, (43), 16 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 08:38:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:38:15,706 INFO L93 Difference]: Finished difference Result 296 states and 437 transitions. [2023-11-23 08:38:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 08:38:15,709 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 144 [2023-11-23 08:38:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:38:15,723 INFO L225 Difference]: With dead ends: 296 [2023-11-23 08:38:15,725 INFO L226 Difference]: Without dead ends: 149 [2023-11-23 08:38:15,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 08:38:15,740 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:38:15,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:38:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-23 08:38:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-23 08:38:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 90 states have internal predecessors, (114), 43 states have call successors, (43), 16 states have call predecessors, (43), 16 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-23 08:38:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 199 transitions. [2023-11-23 08:38:15,809 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 199 transitions. Word has length 144 [2023-11-23 08:38:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:38:15,810 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 199 transitions. [2023-11-23 08:38:15,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 08:38:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 199 transitions. [2023-11-23 08:38:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-23 08:38:15,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:38:15,817 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:38:15,841 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 08:38:16,030 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 08:38:16,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:38:16,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:38:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash -80398441, now seen corresponding path program 1 times [2023-11-23 08:38:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:38:16,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678383455] [2023-11-23 08:38:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:16,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:38:16,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:38:16,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404342676] [2023-11-23 08:38:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:16,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:38:16,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:38:16,150 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 08:38:16,168 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 08:38:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:16,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 08:38:16,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:38:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-23 08:38:16,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:38:16,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:38:16,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678383455] [2023-11-23 08:38:16,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:38:16,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404342676] [2023-11-23 08:38:16,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404342676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:38:16,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:38:16,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 08:38:16,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038828130] [2023-11-23 08:38:16,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:38:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 08:38:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:38:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 08:38:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 08:38:16,971 INFO L87 Difference]: Start difference. First operand 149 states and 199 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-23 08:38:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:38:17,603 INFO L93 Difference]: Finished difference Result 277 states and 372 transitions. [2023-11-23 08:38:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 08:38:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) Word has length 144 [2023-11-23 08:38:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:38:17,611 INFO L225 Difference]: With dead ends: 277 [2023-11-23 08:38:17,611 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 08:38:17,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 08:38:17,618 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 166 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 08:38:17,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 569 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 08:38:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 08:38:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-11-23 08:38:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 92 states have internal predecessors, (115), 43 states have call successors, (43), 16 states have call predecessors, (43), 17 states have return successors, (45), 42 states have call predecessors, (45), 42 states have call successors, (45) [2023-11-23 08:38:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 203 transitions. [2023-11-23 08:38:17,666 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 203 transitions. Word has length 144 [2023-11-23 08:38:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:38:17,668 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 203 transitions. [2023-11-23 08:38:17,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (24), 2 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-23 08:38:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 203 transitions. [2023-11-23 08:38:17,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 08:38:17,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:38:17,692 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:38:17,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 08:38:17,912 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 08:38:17,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:38:17,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:38:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash 255649023, now seen corresponding path program 1 times [2023-11-23 08:38:17,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:38:17,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052229467] [2023-11-23 08:38:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:17,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:38:18,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:38:18,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896810752] [2023-11-23 08:38:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:18,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:38:18,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:38:18,087 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 08:38:18,136 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 08:38:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:19,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 08:38:19,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:38:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 101 proven. 53 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-23 08:38:19,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:38:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-11-23 08:38:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:38:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052229467] [2023-11-23 08:38:19,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:38:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896810752] [2023-11-23 08:38:19,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896810752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 08:38:19,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 08:38:19,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-23 08:38:19,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074868543] [2023-11-23 08:38:19,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 08:38:19,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 08:38:19,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:38:19,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 08:38:19,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-23 08:38:19,579 INFO L87 Difference]: Start difference. First operand 151 states and 203 transitions. Second operand has 13 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 8 states have call successors, (48), 5 states have call predecessors, (48), 4 states have return successors, (44), 6 states have call predecessors, (44), 8 states have call successors, (44) [2023-11-23 08:38:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:38:20,521 INFO L93 Difference]: Finished difference Result 237 states and 321 transitions. [2023-11-23 08:38:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 08:38:20,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 8 states have call successors, (48), 5 states have call predecessors, (48), 4 states have return successors, (44), 6 states have call predecessors, (44), 8 states have call successors, (44) Word has length 145 [2023-11-23 08:38:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:38:20,524 INFO L225 Difference]: With dead ends: 237 [2023-11-23 08:38:20,524 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 08:38:20,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-23 08:38:20,525 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 177 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 08:38:20,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1095 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 08:38:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 08:38:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-11-23 08:38:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 92 states have internal predecessors, (115), 43 states have call successors, (43), 16 states have call predecessors, (43), 17 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2023-11-23 08:38:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2023-11-23 08:38:20,551 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 145 [2023-11-23 08:38:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:38:20,553 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2023-11-23 08:38:20,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 8 states have call successors, (48), 5 states have call predecessors, (48), 4 states have return successors, (44), 6 states have call predecessors, (44), 8 states have call successors, (44) [2023-11-23 08:38:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2023-11-23 08:38:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 08:38:20,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:38:20,560 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:38:20,592 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 08:38:20,774 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 08:38:20,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:38:20,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:38:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash -646917597, now seen corresponding path program 2 times [2023-11-23 08:38:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:38:20,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069980967] [2023-11-23 08:38:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:38:20,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:38:20,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018345602] [2023-11-23 08:38:20,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 08:38:20,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:38:20,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:38:20,998 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 08:38:21,046 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 08:38:21,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 08:38:21,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:38:21,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 08:38:21,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:38:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-23 08:38:21,714 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:38:21,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:38:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069980967] [2023-11-23 08:38:21,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:38:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018345602] [2023-11-23 08:38:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018345602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:38:21,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:38:21,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 08:38:21,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111137854] [2023-11-23 08:38:21,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:38:21,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 08:38:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:38:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 08:38:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 08:38:21,717 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 08:38:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:38:21,998 INFO L93 Difference]: Finished difference Result 161 states and 215 transitions. [2023-11-23 08:38:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 08:38:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 146 [2023-11-23 08:38:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:38:22,000 INFO L225 Difference]: With dead ends: 161 [2023-11-23 08:38:22,001 INFO L226 Difference]: Without dead ends: 159 [2023-11-23 08:38:22,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 08:38:22,002 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 5 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 08:38:22,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 894 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 08:38:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-23 08:38:22,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2023-11-23 08:38:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 97 states have internal predecessors, (119), 44 states have call successors, (44), 17 states have call predecessors, (44), 19 states have return successors, (49), 43 states have call predecessors, (49), 43 states have call successors, (49) [2023-11-23 08:38:22,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 212 transitions. [2023-11-23 08:38:22,015 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 212 transitions. Word has length 146 [2023-11-23 08:38:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:38:22,015 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 212 transitions. [2023-11-23 08:38:22,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-23 08:38:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 212 transitions. [2023-11-23 08:38:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 08:38:22,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:38:22,017 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:38:22,040 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 08:38:22,237 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 08:38:22,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:38:22,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:38:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash -296379364, now seen corresponding path program 1 times [2023-11-23 08:38:22,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:38:22,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878557149] [2023-11-23 08:38:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:22,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:38:22,427 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:38:22,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510274233] [2023-11-23 08:38:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:22,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:38:22,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:38:22,445 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 08:38:22,455 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 08:38:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:23,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 2555 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 08:38:23,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:38:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-23 08:38:23,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:38:23,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:38:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878557149] [2023-11-23 08:38:23,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:38:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510274233] [2023-11-23 08:38:23,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510274233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:38:23,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:38:23,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 08:38:23,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798030763] [2023-11-23 08:38:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:38:23,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 08:38:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:38:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 08:38:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 08:38:23,136 INFO L87 Difference]: Start difference. First operand 158 states and 212 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 08:38:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:38:23,318 INFO L93 Difference]: Finished difference Result 310 states and 417 transitions. [2023-11-23 08:38:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:38:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 145 [2023-11-23 08:38:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:38:23,320 INFO L225 Difference]: With dead ends: 310 [2023-11-23 08:38:23,320 INFO L226 Difference]: Without dead ends: 162 [2023-11-23 08:38:23,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 08:38:23,322 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 1 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:38:23,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 720 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:38:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-23 08:38:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-11-23 08:38:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 100 states have internal predecessors, (122), 44 states have call successors, (44), 17 states have call predecessors, (44), 20 states have return successors, (50), 44 states have call predecessors, (50), 43 states have call successors, (50) [2023-11-23 08:38:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 216 transitions. [2023-11-23 08:38:23,337 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 216 transitions. Word has length 145 [2023-11-23 08:38:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:38:23,338 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 216 transitions. [2023-11-23 08:38:23,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 08:38:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 216 transitions. [2023-11-23 08:38:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-23 08:38:23,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:38:23,340 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:38:23,364 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 08:38:23,556 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 08:38:23,557 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:38:23,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:38:23,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1694621778, now seen corresponding path program 1 times [2023-11-23 08:38:23,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:38:23,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364051545] [2023-11-23 08:38:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:23,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:38:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:38:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:38:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 08:38:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 08:38:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-23 08:38:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:38:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:38:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:38:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 08:38:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-23 08:38:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:38:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-23 08:38:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-23 08:38:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-23 08:38:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-23 08:38:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-23 08:38:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:38:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:38:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 08:38:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-11-23 08:38:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-11-23 08:38:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-11-23 08:38:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-23 08:38:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-23 08:38:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-23 08:38:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-23 08:38:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-23 08:38:24,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:38:24,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364051545] [2023-11-23 08:38:24,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364051545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:38:24,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907092268] [2023-11-23 08:38:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:38:24,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:38:24,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:38:24,832 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 08:38:24,854 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 08:38:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:38:25,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-23 08:38:25,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:38:25,437 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 15 treesize of output 1 [2023-11-23 08:38:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-23 08:38:25,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:38:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907092268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:38:25,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:38:25,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2023-11-23 08:38:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354610846] [2023-11-23 08:38:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:38:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 08:38:25,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:38:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 08:38:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-11-23 08:38:25,917 INFO L87 Difference]: Start difference. First operand 162 states and 216 transitions. Second operand has 11 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 6 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (26), 5 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 08:38:28,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:38:31,156 WARN L539 Checker$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 08:38:33,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 08:38:35,317 WARN L539 Checker$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 08:38:37,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:38:39,426 WARN L539 Checker$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 08:38:41,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:38:44,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 08:38:46,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:38:48,323 WARN L539 Checker$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 08:38:50,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:38:52,423 WARN L539 Checker$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 08:38:54,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:38:56,666 WARN L539 Checker$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 08:38:58,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:39:00,851 WARN L539 Checker$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 08:39:02,960 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 08:39:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:39:03,157 INFO L93 Difference]: Finished difference Result 403 states and 535 transitions. [2023-11-23 08:39:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 08:39:03,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 6 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (26), 5 states have call predecessors, (26), 6 states have call successors, (26) Word has length 153 [2023-11-23 08:39:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:39:03,160 INFO L225 Difference]: With dead ends: 403 [2023-11-23 08:39:03,160 INFO L226 Difference]: Without dead ends: 260 [2023-11-23 08:39:03,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 186 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-11-23 08:39:03,161 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 211 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 84 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:39:03,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 541 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1195 Invalid, 17 Unknown, 0 Unchecked, 37.0s Time] [2023-11-23 08:39:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-23 08:39:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2023-11-23 08:39:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 158 states have (on average 1.2721518987341771) internal successors, (201), 163 states have internal predecessors, (201), 62 states have call successors, (62), 30 states have call predecessors, (62), 33 states have return successors, (73), 60 states have call predecessors, (73), 61 states have call successors, (73) [2023-11-23 08:39:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 336 transitions. [2023-11-23 08:39:03,222 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 336 transitions. Word has length 153 [2023-11-23 08:39:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:39:03,222 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 336 transitions. [2023-11-23 08:39:03,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 6 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (26), 5 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-23 08:39:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 336 transitions. [2023-11-23 08:39:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 08:39:03,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:39:03,237 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:03,267 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 08:39:03,452 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 08:39:03,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:39:03,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:39:03,453 INFO L85 PathProgramCache]: Analyzing trace with hash 524387170, now seen corresponding path program 1 times [2023-11-23 08:39:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:39:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692286760] [2023-11-23 08:39:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:39:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:03,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:39:03,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692286760] [2023-11-23 08:39:03,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:39:03,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394790400] [2023-11-23 08:39:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:03,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:39:03,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:39:03,644 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 08:39:03,715 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 08:39:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:04,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 2686 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 08:39:04,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:39:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-23 08:39:04,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:39:04,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394790400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:39:04,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:39:04,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 08:39:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172812416] [2023-11-23 08:39:04,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:39:04,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 08:39:04,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:39:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 08:39:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 08:39:04,559 INFO L87 Difference]: Start difference. First operand 254 states and 336 transitions. Second operand has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 08:39:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:39:05,025 INFO L93 Difference]: Finished difference Result 482 states and 638 transitions. [2023-11-23 08:39:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:39:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 167 [2023-11-23 08:39:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:39:05,028 INFO L225 Difference]: With dead ends: 482 [2023-11-23 08:39:05,028 INFO L226 Difference]: Without dead ends: 256 [2023-11-23 08:39:05,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 08:39:05,031 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 1 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 08:39:05,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 720 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 08:39:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-23 08:39:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2023-11-23 08:39:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 160 states have (on average 1.26875) internal successors, (203), 164 states have internal predecessors, (203), 62 states have call successors, (62), 30 states have call predecessors, (62), 33 states have return successors, (73), 61 states have call predecessors, (73), 61 states have call successors, (73) [2023-11-23 08:39:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 338 transitions. [2023-11-23 08:39:05,123 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 338 transitions. Word has length 167 [2023-11-23 08:39:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:39:05,123 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 338 transitions. [2023-11-23 08:39:05,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-23 08:39:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 338 transitions. [2023-11-23 08:39:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 08:39:05,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:39:05,136 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:05,164 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 08:39:05,356 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 08:39:05,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:39:05,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:39:05,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1154845795, now seen corresponding path program 1 times [2023-11-23 08:39:05,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:39:05,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638168875] [2023-11-23 08:39:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:05,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:39:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:39:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638168875] [2023-11-23 08:39:05,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:39:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108686935] [2023-11-23 08:39:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:05,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:39:05,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:39:05,496 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 08:39:05,520 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 08:39:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:06,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 2687 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-23 08:39:06,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:39:06,207 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 08:39:06,470 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-11-23 08:39:06,470 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 28 treesize of output 24 [2023-11-23 08:39:06,482 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 08:39:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 08:39:07,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:39:07,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108686935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:39:07,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:39:07,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 08:39:07,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292089323] [2023-11-23 08:39:07,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:39:07,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 08:39:07,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:39:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 08:39:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-23 08:39:07,292 INFO L87 Difference]: Start difference. First operand 256 states and 338 transitions. Second operand has 16 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 6 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2023-11-23 08:39:10,880 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=true, quantifiers [0] [2023-11-23 08:39:13,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:39:15,118 WARN L539 Checker$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 08:39:17,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:39:19,367 WARN L539 Checker$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 08:39:22,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 08:39:24,484 WARN L539 Checker$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 08:39:26,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:39:28,675 WARN L539 Checker$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 08:39:30,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:39:32,742 WARN L539 Checker$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 08:39:35,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:39:37,146 WARN L539 Checker$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 08:39:39,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:39:41,464 WARN L539 Checker$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 08:39:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:39:41,566 INFO L93 Difference]: Finished difference Result 538 states and 704 transitions. [2023-11-23 08:39:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 08:39:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 6 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 167 [2023-11-23 08:39:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:39:41,570 INFO L225 Difference]: With dead ends: 538 [2023-11-23 08:39:41,570 INFO L226 Difference]: Without dead ends: 323 [2023-11-23 08:39:41,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-11-23 08:39:41,571 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 220 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 46 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2023-11-23 08:39:41,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 2180 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1396 Invalid, 15 Unknown, 0 Unchecked, 34.0s Time] [2023-11-23 08:39:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-23 08:39:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2023-11-23 08:39:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 202 states have (on average 1.2821782178217822) internal successors, (259), 207 states have internal predecessors, (259), 69 states have call successors, (69), 38 states have call predecessors, (69), 43 states have return successors, (83), 69 states have call predecessors, (83), 68 states have call successors, (83) [2023-11-23 08:39:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 411 transitions. [2023-11-23 08:39:41,620 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 411 transitions. Word has length 167 [2023-11-23 08:39:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:39:41,622 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 411 transitions. [2023-11-23 08:39:41,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 6 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2023-11-23 08:39:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 411 transitions. [2023-11-23 08:39:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 08:39:41,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:39:41,626 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:39:41,663 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 08:39:41,844 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 08:39:41,844 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:39:41,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:39:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1126345505, now seen corresponding path program 1 times [2023-11-23 08:39:41,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:39:41,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937062792] [2023-11-23 08:39:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:41,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:39:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:42,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:39:42,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937062792] [2023-11-23 08:39:42,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:39:42,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78108411] [2023-11-23 08:39:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:42,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:39:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:39:42,089 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 08:39:42,150 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 08:39:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:42,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 2682 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 08:39:42,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:39:44,770 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((aws_hash_iter_is_valid_~iter.offset Int) (aws_hash_iter_is_valid_~iter.base Int)) (not (= (select (select |c_#memory_$Pointer$.offset| aws_hash_iter_is_valid_~iter.base) aws_hash_iter_is_valid_~iter.offset) 0))) (exists ((aws_hash_iter_is_valid_~iter.offset Int) (aws_hash_iter_is_valid_~iter.base Int)) (not (= (select (select |c_#memory_$Pointer$.base| aws_hash_iter_is_valid_~iter.base) aws_hash_iter_is_valid_~iter.offset) 0)))) is different from true [2023-11-23 08:39:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-23 08:39:44,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:39:44,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78108411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:39:44,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:39:44,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 08:39:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698302718] [2023-11-23 08:39:44,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:39:44,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 08:39:44,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:39:44,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 08:39:44,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=22, Unknown=1, NotChecked=8, Total=42 [2023-11-23 08:39:44,873 INFO L87 Difference]: Start difference. First operand 315 states and 411 transitions. Second operand has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-23 08:39:47,863 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 08:39:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:39:48,391 INFO L93 Difference]: Finished difference Result 561 states and 752 transitions. [2023-11-23 08:39:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 08:39:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) Word has length 167 [2023-11-23 08:39:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:39:48,394 INFO L225 Difference]: With dead ends: 561 [2023-11-23 08:39:48,394 INFO L226 Difference]: Without dead ends: 319 [2023-11-23 08:39:48,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=15, Invalid=30, Unknown=1, NotChecked=10, Total=56 [2023-11-23 08:39:48,396 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 7 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-23 08:39:48,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 823 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 1 Unknown, 211 Unchecked, 3.5s Time] [2023-11-23 08:39:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-23 08:39:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2023-11-23 08:39:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 206 states have (on average 1.2766990291262137) internal successors, (263), 209 states have internal predecessors, (263), 69 states have call successors, (69), 40 states have call predecessors, (69), 43 states have return successors, (83), 69 states have call predecessors, (83), 68 states have call successors, (83) [2023-11-23 08:39:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 415 transitions. [2023-11-23 08:39:48,436 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 415 transitions. Word has length 167 [2023-11-23 08:39:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:39:48,437 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 415 transitions. [2023-11-23 08:39:48,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-23 08:39:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 415 transitions. [2023-11-23 08:39:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-23 08:39:48,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:39:48,441 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:39:48,472 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 08:39:48,660 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 08:39:48,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:39:48,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:39:48,661 INFO L85 PathProgramCache]: Analyzing trace with hash -513904777, now seen corresponding path program 1 times [2023-11-23 08:39:48,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:39:48,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628752625] [2023-11-23 08:39:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:48,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:39:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:48,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:39:48,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628752625] [2023-11-23 08:39:48,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:39:48,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844542700] [2023-11-23 08:39:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:48,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:39:48,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:39:48,936 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 08:39:49,058 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 08:39:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:49,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 153 conjunts are in the unsatisfiable core [2023-11-23 08:39:49,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:39:49,981 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 08:39:49,986 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 15 treesize of output 1 [2023-11-23 08:39:49,990 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 08:39:50,368 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-23 08:39:50,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-23 08:39:50,420 INFO L349 Elim1Store]: treesize reduction 43, result has 6.5 percent of original size [2023-11-23 08:39:50,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 15 [2023-11-23 08:39:50,882 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 13 treesize of output 16 [2023-11-23 08:39:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:39:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:39:51,235 INFO L349 Elim1Store]: treesize reduction 17, result has 51.4 percent of original size [2023-11-23 08:39:51,235 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 2 case distinctions, treesize of input 26 treesize of output 40 [2023-11-23 08:39:51,285 INFO L349 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-11-23 08:39:51,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 08:39:51,316 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-23 08:39:51,317 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 1 case distinctions, treesize of input 47 treesize of output 15 [2023-11-23 08:39:51,331 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 12 treesize of output 1 [2023-11-23 08:39:51,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 3 [2023-11-23 08:39:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 66 proven. 35 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-23 08:39:52,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:39:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-11-23 08:39:53,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844542700] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 08:39:53,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:39:53,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28] total 35 [2023-11-23 08:39:53,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887522995] [2023-11-23 08:39:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:39:53,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 08:39:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:39:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 08:39:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 08:39:53,212 INFO L87 Difference]: Start difference. First operand 319 states and 415 transitions. Second operand has 12 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 6 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-23 08:39:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:39:55,000 INFO L93 Difference]: Finished difference Result 424 states and 569 transitions. [2023-11-23 08:39:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 08:39:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 6 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 173 [2023-11-23 08:39:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:39:55,003 INFO L225 Difference]: With dead ends: 424 [2023-11-23 08:39:55,003 INFO L226 Difference]: Without dead ends: 355 [2023-11-23 08:39:55,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 310 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2023-11-23 08:39:55,006 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 124 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 08:39:55,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 615 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 08:39:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-11-23 08:39:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 346. [2023-11-23 08:39:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 220 states have (on average 1.2727272727272727) internal successors, (280), 226 states have internal predecessors, (280), 78 states have call successors, (78), 40 states have call predecessors, (78), 47 states have return successors, (104), 79 states have call predecessors, (104), 77 states have call successors, (104) [2023-11-23 08:39:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 462 transitions. [2023-11-23 08:39:55,037 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 462 transitions. Word has length 173 [2023-11-23 08:39:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:39:55,037 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 462 transitions. [2023-11-23 08:39:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 6 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-23 08:39:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 462 transitions. [2023-11-23 08:39:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-23 08:39:55,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:39:55,040 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:39:55,064 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 08:39:55,262 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 08:39:55,262 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:39:55,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:39:55,263 INFO L85 PathProgramCache]: Analyzing trace with hash 150678171, now seen corresponding path program 1 times [2023-11-23 08:39:55,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:39:55,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140336315] [2023-11-23 08:39:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:55,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:39:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:55,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:39:55,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140336315] [2023-11-23 08:39:55,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:39:55,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783126933] [2023-11-23 08:39:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:39:55,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:39:55,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:39:55,424 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 08:39:55,443 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 08:39:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:39:55,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 2735 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 08:39:55,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:39:56,067 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 08:39:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 08:39:56,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:39:56,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783126933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:39:56,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:39:56,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 08:39:56,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399021836] [2023-11-23 08:39:56,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:39:56,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 08:39:56,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:39:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 08:39:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-23 08:39:56,175 INFO L87 Difference]: Start difference. First operand 346 states and 462 transitions. Second operand has 11 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-11-23 08:39:59,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 08:40:01,409 WARN L539 Checker$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 08:40:03,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:05,509 WARN L539 Checker$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 08:40:07,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:09,939 WARN L539 Checker$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 08:40:11,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:13,970 WARN L539 Checker$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 08:40:15,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:18,004 WARN L539 Checker$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 08:40:20,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:22,219 WARN L539 Checker$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 08:40:24,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:26,414 WARN L539 Checker$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 08:40:28,480 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 08:40:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:40:28,525 INFO L93 Difference]: Finished difference Result 630 states and 848 transitions. [2023-11-23 08:40:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 08:40:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 185 [2023-11-23 08:40:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:40:28,528 INFO L225 Difference]: With dead ends: 630 [2023-11-23 08:40:28,528 INFO L226 Difference]: Without dead ends: 360 [2023-11-23 08:40:28,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-23 08:40:28,530 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 127 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 20 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:40:28,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1361 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 703 Invalid, 15 Unknown, 0 Unchecked, 32.2s Time] [2023-11-23 08:40:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-11-23 08:40:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 348. [2023-11-23 08:40:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 222 states have (on average 1.2702702702702702) internal successors, (282), 228 states have internal predecessors, (282), 78 states have call successors, (78), 40 states have call predecessors, (78), 47 states have return successors, (104), 79 states have call predecessors, (104), 77 states have call successors, (104) [2023-11-23 08:40:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 464 transitions. [2023-11-23 08:40:28,610 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 464 transitions. Word has length 185 [2023-11-23 08:40:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:40:28,611 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 464 transitions. [2023-11-23 08:40:28,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-11-23 08:40:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 464 transitions. [2023-11-23 08:40:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-23 08:40:28,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:40:28,617 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:40:28,660 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 08:40:28,836 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 08:40:28,836 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:40:28,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:40:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1646126452, now seen corresponding path program 1 times [2023-11-23 08:40:28,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:40:28,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903164852] [2023-11-23 08:40:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:40:28,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:40:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:40:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:40:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903164852] [2023-11-23 08:40:28,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:40:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652770440] [2023-11-23 08:40:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:40:28,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:40:28,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:40:28,947 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 08:40:28,950 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 08:40:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:40:29,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 08:40:29,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:40:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 08:40:29,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:40:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652770440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:40:29,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:40:29,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 08:40:29,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820963052] [2023-11-23 08:40:29,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:40:29,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 08:40:29,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:40:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 08:40:29,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 08:40:29,753 INFO L87 Difference]: Start difference. First operand 348 states and 464 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-23 08:40:29,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:40:29,941 INFO L93 Difference]: Finished difference Result 620 states and 833 transitions. [2023-11-23 08:40:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 08:40:29,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 181 [2023-11-23 08:40:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:40:29,944 INFO L225 Difference]: With dead ends: 620 [2023-11-23 08:40:29,944 INFO L226 Difference]: Without dead ends: 346 [2023-11-23 08:40:29,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 08:40:29,947 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 20 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:40:29,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 500 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 08:40:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-23 08:40:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2023-11-23 08:40:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 220 states have (on average 1.2636363636363637) internal successors, (278), 226 states have internal predecessors, (278), 78 states have call successors, (78), 40 states have call predecessors, (78), 47 states have return successors, (103), 79 states have call predecessors, (103), 77 states have call successors, (103) [2023-11-23 08:40:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 459 transitions. [2023-11-23 08:40:29,979 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 459 transitions. Word has length 181 [2023-11-23 08:40:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:40:29,979 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 459 transitions. [2023-11-23 08:40:29,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-23 08:40:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 459 transitions. [2023-11-23 08:40:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-11-23 08:40:29,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:40:29,981 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:40:30,003 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 08:40:30,200 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 08:40:30,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:40:30,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:40:30,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1937686969, now seen corresponding path program 2 times [2023-11-23 08:40:30,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:40:30,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861478251] [2023-11-23 08:40:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:40:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:40:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:40:30,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:40:30,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861478251] [2023-11-23 08:40:30,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 08:40:30,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849917309] [2023-11-23 08:40:30,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 08:40:30,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:40:30,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:40:30,343 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 08:40:30,358 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 08:40:30,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 08:40:30,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 08:40:31,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 08:40:31,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:40:31,068 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 08:40:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 08:40:31,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:40:31,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849917309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:40:31,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:40:31,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 08:40:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348419479] [2023-11-23 08:40:31,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:40:31,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 08:40:31,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:40:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 08:40:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-23 08:40:31,195 INFO L87 Difference]: Start difference. First operand 346 states and 459 transitions. Second operand has 12 states, 9 states have (on average 9.666666666666666) internal successors, (87), 10 states have internal predecessors, (87), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2023-11-23 08:40:35,268 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=true, quantifiers [0] [2023-11-23 08:40:37,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:39,372 WARN L539 Checker$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 08:40:41,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:43,529 WARN L539 Checker$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 08:40:45,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:48,033 WARN L539 Checker$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 08:40:50,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:52,107 WARN L539 Checker$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 08:40:54,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:40:56,285 WARN L539 Checker$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 08:40:58,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:00,425 WARN L539 Checker$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 08:41:02,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:04,626 WARN L539 Checker$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 08:41:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:41:04,675 INFO L93 Difference]: Finished difference Result 637 states and 851 transitions. [2023-11-23 08:41:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 08:41:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 9.666666666666666) internal successors, (87), 10 states have internal predecessors, (87), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) Word has length 191 [2023-11-23 08:41:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:41:04,678 INFO L225 Difference]: With dead ends: 637 [2023-11-23 08:41:04,678 INFO L226 Difference]: Without dead ends: 364 [2023-11-23 08:41:04,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-23 08:41:04,680 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 128 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 21 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.3s IncrementalHoareTripleChecker+Time [2023-11-23 08:41:04,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1332 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 791 Invalid, 15 Unknown, 0 Unchecked, 33.3s Time] [2023-11-23 08:41:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-23 08:41:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 346. [2023-11-23 08:41:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 220 states have (on average 1.259090909090909) internal successors, (277), 226 states have internal predecessors, (277), 78 states have call successors, (78), 40 states have call predecessors, (78), 47 states have return successors, (103), 79 states have call predecessors, (103), 77 states have call successors, (103) [2023-11-23 08:41:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 458 transitions. [2023-11-23 08:41:04,749 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 458 transitions. Word has length 191 [2023-11-23 08:41:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:41:04,749 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 458 transitions. [2023-11-23 08:41:04,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 9.666666666666666) internal successors, (87), 10 states have internal predecessors, (87), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2023-11-23 08:41:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 458 transitions. [2023-11-23 08:41:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-23 08:41:04,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:41:04,751 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:41:04,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 08:41:04,973 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 08:41:04,973 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:41:04,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:41:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash -822082055, now seen corresponding path program 1 times [2023-11-23 08:41:04,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:41:04,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419715536] [2023-11-23 08:41:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:41:04,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:41:05,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:41:05,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365118054] [2023-11-23 08:41:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:41:05,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:41:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:41:05,137 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 08:41:05,200 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 08:41:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:41:05,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 2792 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 08:41:05,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:41:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-23 08:41:05,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:41:05,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:41:05,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419715536] [2023-11-23 08:41:05,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:41:05,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365118054] [2023-11-23 08:41:05,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365118054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:41:05,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:41:05,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-23 08:41:05,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381053695] [2023-11-23 08:41:05,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:41:05,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 08:41:05,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:41:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 08:41:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-23 08:41:05,923 INFO L87 Difference]: Start difference. First operand 346 states and 458 transitions. Second operand has 12 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 3 states have call successors, (33), 2 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) [2023-11-23 08:41:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:41:06,760 INFO L93 Difference]: Finished difference Result 643 states and 857 transitions. [2023-11-23 08:41:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 08:41:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 3 states have call successors, (33), 2 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) Word has length 193 [2023-11-23 08:41:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:41:06,762 INFO L225 Difference]: With dead ends: 643 [2023-11-23 08:41:06,763 INFO L226 Difference]: Without dead ends: 373 [2023-11-23 08:41:06,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-23 08:41:06,765 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 08:41:06,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1824 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 08:41:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-23 08:41:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 348. [2023-11-23 08:41:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 221 states have (on average 1.257918552036199) internal successors, (278), 228 states have internal predecessors, (278), 78 states have call successors, (78), 40 states have call predecessors, (78), 48 states have return successors, (104), 79 states have call predecessors, (104), 77 states have call successors, (104) [2023-11-23 08:41:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 460 transitions. [2023-11-23 08:41:06,795 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 460 transitions. Word has length 193 [2023-11-23 08:41:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:41:06,796 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 460 transitions. [2023-11-23 08:41:06,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 3 states have call successors, (33), 2 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) [2023-11-23 08:41:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 460 transitions. [2023-11-23 08:41:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-23 08:41:06,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:41:06,798 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:41:06,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 08:41:07,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:41:07,016 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:41:07,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:41:07,017 INFO L85 PathProgramCache]: Analyzing trace with hash -84003116, now seen corresponding path program 1 times [2023-11-23 08:41:07,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:41:07,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557027170] [2023-11-23 08:41:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:41:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:41:07,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:41:07,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615429916] [2023-11-23 08:41:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:41:07,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:41:07,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:41:07,094 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:41:07,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 08:41:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:41:07,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 2796 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-23 08:41:07,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:41:08,150 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 15 treesize of output 1 [2023-11-23 08:41:08,157 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 32 treesize of output 28 [2023-11-23 08:41:08,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:41:08,165 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 28 treesize of output 23 [2023-11-23 08:41:08,180 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 15 treesize of output 1 [2023-11-23 08:41:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-23 08:41:08,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:41:09,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:41:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557027170] [2023-11-23 08:41:09,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:41:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615429916] [2023-11-23 08:41:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615429916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:41:09,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:41:09,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-23 08:41:09,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83725548] [2023-11-23 08:41:09,301 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 08:41:09,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 08:41:09,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:41:09,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 08:41:09,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2023-11-23 08:41:09,303 INFO L87 Difference]: Start difference. First operand 348 states and 460 transitions. Second operand has 20 states, 14 states have (on average 6.5) internal successors, (91), 18 states have internal predecessors, (91), 9 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (31), 7 states have call predecessors, (31), 9 states have call successors, (31) [2023-11-23 08:41:13,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:16,035 WARN L539 Checker$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 08:41:19,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:41:19,409 INFO L93 Difference]: Finished difference Result 656 states and 871 transitions. [2023-11-23 08:41:19,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 08:41:19,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 6.5) internal successors, (91), 18 states have internal predecessors, (91), 9 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (31), 7 states have call predecessors, (31), 9 states have call successors, (31) Word has length 195 [2023-11-23 08:41:19,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:41:19,412 INFO L225 Difference]: With dead ends: 656 [2023-11-23 08:41:19,412 INFO L226 Difference]: Without dead ends: 350 [2023-11-23 08:41:19,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 08:41:19,414 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 33 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-11-23 08:41:19,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2720 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 968 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2023-11-23 08:41:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-23 08:41:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 346. [2023-11-23 08:41:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 220 states have (on average 1.2545454545454546) internal successors, (276), 226 states have internal predecessors, (276), 78 states have call successors, (78), 40 states have call predecessors, (78), 47 states have return successors, (103), 79 states have call predecessors, (103), 77 states have call successors, (103) [2023-11-23 08:41:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 457 transitions. [2023-11-23 08:41:19,487 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 457 transitions. Word has length 195 [2023-11-23 08:41:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:41:19,487 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 457 transitions. [2023-11-23 08:41:19,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 6.5) internal successors, (91), 18 states have internal predecessors, (91), 9 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (31), 7 states have call predecessors, (31), 9 states have call successors, (31) [2023-11-23 08:41:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 457 transitions. [2023-11-23 08:41:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-23 08:41:19,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:41:19,497 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:41:19,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 08:41:19,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 08:41:19,716 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:41:19,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:41:19,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1702456960, now seen corresponding path program 1 times [2023-11-23 08:41:19,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:41:19,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514207086] [2023-11-23 08:41:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:41:19,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:41:19,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:41:19,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815906120] [2023-11-23 08:41:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:41:19,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:41:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:41:19,885 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:41:19,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 08:41:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:41:20,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 2798 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-23 08:41:20,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:41:20,838 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 08:41:21,009 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 08:41:21,024 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-11-23 08:41:21,025 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 28 treesize of output 24 [2023-11-23 08:41:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-23 08:41:21,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 08:41:21,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:41:21,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514207086] [2023-11-23 08:41:21,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:41:21,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815906120] [2023-11-23 08:41:21,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815906120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 08:41:21,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 08:41:21,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 08:41:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727600923] [2023-11-23 08:41:21,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 08:41:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 08:41:21,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:41:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 08:41:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-23 08:41:21,436 INFO L87 Difference]: Start difference. First operand 346 states and 457 transitions. Second operand has 17 states, 13 states have (on average 8.23076923076923) internal successors, (107), 15 states have internal predecessors, (107), 8 states have call successors, (35), 4 states have call predecessors, (35), 7 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2023-11-23 08:41:25,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 08:41:27,695 WARN L539 Checker$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 08:41:29,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:31,832 WARN L539 Checker$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 08:41:33,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:36,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 08:41:39,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:41,267 WARN L539 Checker$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 08:41:43,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:45,355 WARN L539 Checker$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 08:41:47,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:49,756 WARN L539 Checker$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 08:41:51,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 08:41:54,054 WARN L539 Checker$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 08:41:56,172 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 08:41:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:41:56,281 INFO L93 Difference]: Finished difference Result 636 states and 855 transitions. [2023-11-23 08:41:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 08:41:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 8.23076923076923) internal successors, (107), 15 states have internal predecessors, (107), 8 states have call successors, (35), 4 states have call predecessors, (35), 7 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) Word has length 201 [2023-11-23 08:41:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:41:56,284 INFO L225 Difference]: With dead ends: 636 [2023-11-23 08:41:56,284 INFO L226 Difference]: Without dead ends: 375 [2023-11-23 08:41:56,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-11-23 08:41:56,286 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 195 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 41 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.5s IncrementalHoareTripleChecker+Time [2023-11-23 08:41:56,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 1937 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1546 Invalid, 15 Unknown, 0 Unchecked, 34.5s Time] [2023-11-23 08:41:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-23 08:41:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 349. [2023-11-23 08:41:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 222 states have (on average 1.2522522522522523) internal successors, (278), 228 states have internal predecessors, (278), 78 states have call successors, (78), 40 states have call predecessors, (78), 48 states have return successors, (105), 80 states have call predecessors, (105), 77 states have call successors, (105) [2023-11-23 08:41:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 461 transitions. [2023-11-23 08:41:56,371 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 461 transitions. Word has length 201 [2023-11-23 08:41:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:41:56,372 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 461 transitions. [2023-11-23 08:41:56,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 8.23076923076923) internal successors, (107), 15 states have internal predecessors, (107), 8 states have call successors, (35), 4 states have call predecessors, (35), 7 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2023-11-23 08:41:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 461 transitions. [2023-11-23 08:41:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-23 08:41:56,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:41:56,374 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:41:56,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 08:41:56,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 08:41:56,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:41:56,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:41:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash -708293108, now seen corresponding path program 1 times [2023-11-23 08:41:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:41:56,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927738772] [2023-11-23 08:41:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:41:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:41:56,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:41:56,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001939830] [2023-11-23 08:41:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:41:56,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:41:56,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:41:56,681 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:41:56,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 08:41:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 08:41:57,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 2831 conjuncts, 131 conjunts are in the unsatisfiable core [2023-11-23 08:41:57,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 08:41:57,915 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 30 treesize of output 24 [2023-11-23 08:41:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:41:57,936 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 0 case distinctions, treesize of input 51 treesize of output 34 [2023-11-23 08:41:57,948 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 08:41:57,954 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 08:41:58,656 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 08:41:58,656 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 19 treesize of output 18 [2023-11-23 08:41:58,682 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-23 08:41:58,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 48 [2023-11-23 08:41:58,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 08:41:58,695 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 0 case distinctions, treesize of input 33 treesize of output 22 [2023-11-23 08:42:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 163 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-23 08:42:00,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 08:42:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 08:42:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927738772] [2023-11-23 08:42:07,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 08:42:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001939830] [2023-11-23 08:42:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001939830] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 08:42:07,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 08:42:07,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-23 08:42:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023900601] [2023-11-23 08:42:07,954 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 08:42:07,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 08:42:07,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 08:42:07,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 08:42:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=730, Unknown=1, NotChecked=0, Total=812 [2023-11-23 08:42:07,955 INFO L87 Difference]: Start difference. First operand 349 states and 461 transitions. Second operand has 24 states, 18 states have (on average 6.055555555555555) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2023-11-23 08:42:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 08:42:34,177 INFO L93 Difference]: Finished difference Result 658 states and 878 transitions. [2023-11-23 08:42:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 08:42:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 6.055555555555555) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) Word has length 203 [2023-11-23 08:42:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 08:42:34,180 INFO L225 Difference]: With dead ends: 658 [2023-11-23 08:42:34,180 INFO L226 Difference]: Without dead ends: 394 [2023-11-23 08:42:34,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 275 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=274, Invalid=2481, Unknown=1, NotChecked=0, Total=2756 [2023-11-23 08:42:34,183 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 182 mSDsluCounter, 2338 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2023-11-23 08:42:34,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 2561 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2023-11-23 08:42:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-23 08:42:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 363. [2023-11-23 08:42:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 233 states have (on average 1.2446351931330473) internal successors, (290), 239 states have internal predecessors, (290), 78 states have call successors, (78), 42 states have call predecessors, (78), 51 states have return successors, (106), 81 states have call predecessors, (106), 77 states have call successors, (106) [2023-11-23 08:42:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 474 transitions. [2023-11-23 08:42:34,274 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 474 transitions. Word has length 203 [2023-11-23 08:42:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 08:42:34,274 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 474 transitions. [2023-11-23 08:42:34,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 6.055555555555555) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2023-11-23 08:42:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 474 transitions. [2023-11-23 08:42:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-23 08:42:34,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 08:42:34,304 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 08:42:34,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 08:42:34,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 08:42:34,521 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 08:42:34,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 08:42:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash 274442769, now seen corresponding path program 1 times [2023-11-23 08:42:34,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 08:42:34,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092387708] [2023-11-23 08:42:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:42:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 08:42:34,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 08:42:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349682560] [2023-11-23 08:42:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 08:42:34,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 08:42:34,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 08:42:34,700 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 08:42:34,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process Killed by 15