./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl --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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:07:40,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:07:40,936 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-12 02:07:40,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:07:40,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:07:41,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:07:41,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:07:41,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:07:41,013 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:07:41,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:07:41,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:07:41,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:07:41,022 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:07:41,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:07:41,028 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:07:41,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:07:41,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:07:41,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:07:41,032 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:07:41,032 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:07:41,033 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:07:41,034 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:07:41,035 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:07:41,035 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:07:41,036 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:07:41,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:07:41,037 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:07:41,037 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:07:41,038 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:07:41,038 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:07:41,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:07:41,040 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:07:41,041 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:07:41,041 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:07:41,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:07:41,041 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:07:41,042 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2023-11-12 02:07:41,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:07:41,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:07:41,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:07:41,484 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:07:41,487 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:07:41,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2023-11-12 02:07:44,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:07:45,326 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:07:45,326 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2023-11-12 02:07:45,392 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/data/aa2de17be/bae4155aa3fb4c4abd55df406bc0f893/FLAG577ccb6d4 [2023-11-12 02:07:45,729 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/data/aa2de17be/bae4155aa3fb4c4abd55df406bc0f893 [2023-11-12 02:07:45,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:07:45,736 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:07:45,738 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:07:45,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:07:45,750 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:07:45,751 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:07:45" (1/1) ... [2023-11-12 02:07:45,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75369470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:45, skipping insertion in model container [2023-11-12 02:07:45,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:07:45" (1/1) ... [2023-11-12 02:07:45,890 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:07:46,264 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2023-11-12 02:07:46,275 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2023-11-12 02:07:47,626 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,627 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,628 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,629 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,631 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,647 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,648 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,651 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,652 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,654 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,656 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,657 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:47,658 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,162 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 02:07:48,164 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 02:07:48,165 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 02:07:48,167 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 02:07:48,169 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 02:07:48,170 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 02:07:48,171 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 02:07:48,172 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 02:07:48,173 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 02:07:48,174 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 02:07:48,356 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,365 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:07:48,468 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:07:48,484 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2023-11-12 02:07:48,484 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2023-11-12 02:07:48,545 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,546 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,546 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,547 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,548 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,558 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,559 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,561 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,562 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,563 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,564 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,565 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,566 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,611 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 02:07:48,612 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 02:07:48,613 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 02:07:48,614 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 02:07:48,616 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 02:07:48,617 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 02:07:48,618 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 02:07:48,619 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 02:07:48,619 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 02:07:48,620 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 02:07:48,642 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,648 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:07:48,659 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7529-7540] [2023-11-12 02:07:48,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:07:48,959 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,960 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,960 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,960 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,960 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,961 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,961 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,961 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,961 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,961 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,962 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,962 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,962 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,962 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,963 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:07:48,972 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:07:48,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48 WrapperNode [2023-11-12 02:07:48,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:07:48,974 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:07:48,974 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:07:48,974 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:07:48,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,219 INFO L138 Inliner]: procedures = 689, calls = 1554, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 578 [2023-11-12 02:07:49,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:07:49,220 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:07:49,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:07:49,221 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:07:49,232 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,302 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:07:49,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:07:49,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:07:49,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:07:49,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (1/1) ... [2023-11-12 02:07:49,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:07:49,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:49,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:07:49,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:07:49,431 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-12 02:07:49,432 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-12 02:07:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:07:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-12 02:07:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-12 02:07:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-12 02:07:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-12 02:07:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 02:07:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 02:07:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:07:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 02:07:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 02:07:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:07:49,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:07:49,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:07:49,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:07:49,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:07:49,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:07:49,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:07:49,441 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 02:07:49,441 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 02:07:49,442 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 02:07:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 02:07:49,442 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-12 02:07:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-12 02:07:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 02:07:49,444 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 02:07:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:07:49,444 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:07:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:07:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:07:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 02:07:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 02:07:49,446 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 02:07:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 02:07:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 02:07:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:07:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:07:49,836 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:07:49,840 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:07:50,953 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:07:50,964 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:07:50,964 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:07:50,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:07:50 BoogieIcfgContainer [2023-11-12 02:07:50,968 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:07:50,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:07:50,975 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:07:50,979 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:07:50,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:07:45" (1/3) ... [2023-11-12 02:07:50,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60eb3fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:07:50, skipping insertion in model container [2023-11-12 02:07:50,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:48" (2/3) ... [2023-11-12 02:07:50,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60eb3fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:07:50, skipping insertion in model container [2023-11-12 02:07:50,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:07:50" (3/3) ... [2023-11-12 02:07:50,984 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2023-11-12 02:07:51,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:07:51,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:07:51,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:07:51,110 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;@46cae55a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:07:51,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:07:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 02:07:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 02:07:51,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:51,139 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:51,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:51,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1460968734, now seen corresponding path program 1 times [2023-11-12 02:07:51,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:51,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596894419] [2023-11-12 02:07:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:51,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:51,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:07:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:51,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:07:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:51,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-12 02:07:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:52,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:07:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:52,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:07:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:52,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-12 02:07:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:52,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-12 02:07:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:52,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-12 02:07:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:52,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-12 02:07:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 02:07:52,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:52,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596894419] [2023-11-12 02:07:52,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596894419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:52,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:52,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:07:52,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828410648] [2023-11-12 02:07:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:52,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:07:52,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:07:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:07:52,247 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-12 02:07:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:52,722 INFO L93 Difference]: Finished difference Result 228 states and 297 transitions. [2023-11-12 02:07:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:07:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2023-11-12 02:07:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:52,736 INFO L225 Difference]: With dead ends: 228 [2023-11-12 02:07:52,737 INFO L226 Difference]: Without dead ends: 114 [2023-11-12 02:07:52,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:07:52,745 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:52,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 130 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:07:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-12 02:07:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2023-11-12 02:07:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-12 02:07:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2023-11-12 02:07:52,827 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2023-11-12 02:07:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:52,828 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2023-11-12 02:07:52,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-12 02:07:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2023-11-12 02:07:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 02:07:52,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:52,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-12 02:07:52,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:07:52,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:52,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1894775411, now seen corresponding path program 1 times [2023-11-12 02:07:52,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:52,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024316256] [2023-11-12 02:07:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:52,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:07:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:07:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-12 02:07:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:07:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:07:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-12 02:07:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-12 02:07:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-12 02:07:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-12 02:07:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-12 02:07:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 02:07:53,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:53,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024316256] [2023-11-12 02:07:53,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024316256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:53,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:07:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068563693] [2023-11-12 02:07:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:53,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:07:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:07:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:07:53,631 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 02:07:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:54,339 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2023-11-12 02:07:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:07:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2023-11-12 02:07:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:54,342 INFO L225 Difference]: With dead ends: 199 [2023-11-12 02:07:54,343 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 02:07:54,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:07:54,345 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 93 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:54,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 294 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:07:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 02:07:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2023-11-12 02:07:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-12 02:07:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2023-11-12 02:07:54,365 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2023-11-12 02:07:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:54,366 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2023-11-12 02:07:54,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 02:07:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2023-11-12 02:07:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-12 02:07:54,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:54,371 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-12 02:07:54,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:07:54,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:54,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1692678563, now seen corresponding path program 1 times [2023-11-12 02:07:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:54,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755438930] [2023-11-12 02:07:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:54,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:54,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386745604] [2023-11-12 02:07:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:54,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:54,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:54,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:54,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:07:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:55,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 2115 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:07:55,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 02:07:55,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:55,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755438930] [2023-11-12 02:07:55,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386745604] [2023-11-12 02:07:55,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386745604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:55,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:55,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:07:55,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596232538] [2023-11-12 02:07:55,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:55,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:07:55,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:07:55,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:07:55,210 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-12 02:07:55,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:55,295 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2023-11-12 02:07:55,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:07:55,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 86 [2023-11-12 02:07:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:55,300 INFO L225 Difference]: With dead ends: 190 [2023-11-12 02:07:55,300 INFO L226 Difference]: Without dead ends: 117 [2023-11-12 02:07:55,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:07:55,303 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:55,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 887 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:07:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-12 02:07:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2023-11-12 02:07:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-12 02:07:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2023-11-12 02:07:55,324 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 86 [2023-11-12 02:07:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:55,325 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2023-11-12 02:07:55,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-12 02:07:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2023-11-12 02:07:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-12 02:07:55,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:55,328 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-12 02:07:55,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:55,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:07:55,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:55,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash -124616364, now seen corresponding path program 1 times [2023-11-12 02:07:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:55,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13523589] [2023-11-12 02:07:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:55,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:55,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:55,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341049883] [2023-11-12 02:07:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:55,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:55,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:55,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:07:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:56,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:07:56,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 02:07:56,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13523589] [2023-11-12 02:07:56,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341049883] [2023-11-12 02:07:56,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341049883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:56,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:56,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:07:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430646851] [2023-11-12 02:07:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:56,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:07:56,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:07:56,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:07:56,267 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 02:07:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:56,308 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2023-11-12 02:07:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:07:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2023-11-12 02:07:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:56,315 INFO L225 Difference]: With dead ends: 134 [2023-11-12 02:07:56,316 INFO L226 Difference]: Without dead ends: 114 [2023-11-12 02:07:56,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:07:56,320 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:56,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 382 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:07:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-12 02:07:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-11-12 02:07:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-12 02:07:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2023-11-12 02:07:56,351 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 86 [2023-11-12 02:07:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:56,353 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2023-11-12 02:07:56,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 02:07:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2023-11-12 02:07:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 02:07:56,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:56,356 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-12 02:07:56,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:56,566 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:56,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash -117447722, now seen corresponding path program 1 times [2023-11-12 02:07:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766122017] [2023-11-12 02:07:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:56,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:56,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:56,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226639651] [2023-11-12 02:07:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:56,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:56,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:56,648 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:56,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:07:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:57,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:07:57,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:07:57,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:57,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:57,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766122017] [2023-11-12 02:07:57,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:57,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226639651] [2023-11-12 02:07:57,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226639651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:57,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:57,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:07:57,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139954415] [2023-11-12 02:07:57,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:57,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:07:57,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:07:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:07:57,218 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 02:07:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:57,270 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2023-11-12 02:07:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:07:57,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2023-11-12 02:07:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:57,273 INFO L225 Difference]: With dead ends: 166 [2023-11-12 02:07:57,277 INFO L226 Difference]: Without dead ends: 119 [2023-11-12 02:07:57,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:07:57,283 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:57,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:07:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-12 02:07:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2023-11-12 02:07:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 79 states have internal predecessors, (93), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-12 02:07:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2023-11-12 02:07:57,315 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 87 [2023-11-12 02:07:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:57,316 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2023-11-12 02:07:57,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 02:07:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2023-11-12 02:07:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 02:07:57,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:57,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-12 02:07:57,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:07:57,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:57,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:57,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash 995990719, now seen corresponding path program 1 times [2023-11-12 02:07:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:57,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604525576] [2023-11-12 02:07:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:57,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:57,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730389114] [2023-11-12 02:07:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:57,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:57,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:57,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:57,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:07:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:58,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 2140 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:07:58,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:07:58,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604525576] [2023-11-12 02:07:58,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730389114] [2023-11-12 02:07:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730389114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:58,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:58,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:07:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911879325] [2023-11-12 02:07:58,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:58,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:07:58,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:07:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:07:58,255 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 02:07:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:58,317 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2023-11-12 02:07:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:07:58,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2023-11-12 02:07:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:58,319 INFO L225 Difference]: With dead ends: 160 [2023-11-12 02:07:58,319 INFO L226 Difference]: Without dead ends: 117 [2023-11-12 02:07:58,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:07:58,322 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 4 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:58,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 508 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:07:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-12 02:07:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2023-11-12 02:07:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 79 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-12 02:07:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2023-11-12 02:07:58,344 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 87 [2023-11-12 02:07:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:58,344 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2023-11-12 02:07:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 02:07:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2023-11-12 02:07:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-12 02:07:58,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:58,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-12 02:07:58,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:58,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:58,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash -462422751, now seen corresponding path program 1 times [2023-11-12 02:07:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:58,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272921072] [2023-11-12 02:07:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:58,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729068699] [2023-11-12 02:07:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:58,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:58,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:58,669 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:58,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:07:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:59,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-12 02:07:59,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:59,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-12 02:08:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:08:00,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:01,053 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-12 02:08:01,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2023-11-12 02:08:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 02:08:01,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272921072] [2023-11-12 02:08:01,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:01,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729068699] [2023-11-12 02:08:01,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729068699] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:08:01,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:08:01,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 26 [2023-11-12 02:08:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127531390] [2023-11-12 02:08:01,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:01,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:08:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:01,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:08:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:08:01,144 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 02:08:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:02,873 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2023-11-12 02:08:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:08:02,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2023-11-12 02:08:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:02,876 INFO L225 Difference]: With dead ends: 127 [2023-11-12 02:08:02,876 INFO L226 Difference]: Without dead ends: 122 [2023-11-12 02:08:02,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:08:02,878 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 68 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:02,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 311 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:08:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-12 02:08:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2023-11-12 02:08:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 80 states have (on average 1.1875) internal successors, (95), 82 states have internal predecessors, (95), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2023-11-12 02:08:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2023-11-12 02:08:02,903 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 90 [2023-11-12 02:08:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:02,904 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2023-11-12 02:08:02,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 02:08:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2023-11-12 02:08:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 02:08:02,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:02,907 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2023-11-12 02:08:02,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:03,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:03,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:03,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -910834864, now seen corresponding path program 2 times [2023-11-12 02:08:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:03,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533581650] [2023-11-12 02:08:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:03,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:03,247 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:03,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705432967] [2023-11-12 02:08:03,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:08:03,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:03,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:03,249 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:03,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:08:04,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:08:04,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:08:04,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:08:04,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:08:04,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 02:08:04,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:04,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533581650] [2023-11-12 02:08:04,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:04,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705432967] [2023-11-12 02:08:04,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705432967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:04,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:08:04,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:08:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274555900] [2023-11-12 02:08:04,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:04,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:08:04,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:04,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:08:04,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:08:04,198 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 02:08:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:04,291 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2023-11-12 02:08:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:08:04,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 93 [2023-11-12 02:08:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:04,294 INFO L225 Difference]: With dead ends: 147 [2023-11-12 02:08:04,294 INFO L226 Difference]: Without dead ends: 121 [2023-11-12 02:08:04,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:08:04,295 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:04,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 384 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:08:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-12 02:08:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-12 02:08:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 83 states have (on average 1.180722891566265) internal successors, (98), 85 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2023-11-12 02:08:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-11-12 02:08:04,317 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 93 [2023-11-12 02:08:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:04,317 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-11-12 02:08:04,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 02:08:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-11-12 02:08:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-12 02:08:04,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:04,320 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2023-11-12 02:08:04,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:04,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:08:04,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:04,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash 790840008, now seen corresponding path program 3 times [2023-11-12 02:08:04,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:04,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814664372] [2023-11-12 02:08:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:04,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:04,610 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:04,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338339820] [2023-11-12 02:08:04,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:08:04,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:04,612 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:04,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:08:05,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:08:05,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:08:05,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:08:05,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 02:08:05,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 02:08:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814664372] [2023-11-12 02:08:05,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338339820] [2023-11-12 02:08:05,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338339820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:05,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:08:05,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:08:05,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914817432] [2023-11-12 02:08:05,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:05,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:08:05,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:05,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:08:05,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:08:05,975 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 02:08:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:06,094 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2023-11-12 02:08:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:08:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 96 [2023-11-12 02:08:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:06,097 INFO L225 Difference]: With dead ends: 190 [2023-11-12 02:08:06,097 INFO L226 Difference]: Without dead ends: 133 [2023-11-12 02:08:06,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:08:06,098 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 19 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:06,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 743 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:08:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-12 02:08:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2023-11-12 02:08:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 93 states have internal predecessors, (108), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2023-11-12 02:08:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2023-11-12 02:08:06,118 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 96 [2023-11-12 02:08:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:06,118 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2023-11-12 02:08:06,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 02:08:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2023-11-12 02:08:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 02:08:06,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:06,121 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2023-11-12 02:08:06,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:06,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:06,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:06,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2103556311, now seen corresponding path program 1 times [2023-11-12 02:08:06,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:06,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906757006] [2023-11-12 02:08:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:06,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:06,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:06,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289908226] [2023-11-12 02:08:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:06,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:06,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:06,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:06,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:08:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:06,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:08:06,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 02:08:07,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:08:07,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906757006] [2023-11-12 02:08:07,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289908226] [2023-11-12 02:08:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289908226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:07,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:07,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:08:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772899227] [2023-11-12 02:08:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:08:07,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:08:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:08:07,004 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-12 02:08:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:07,243 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2023-11-12 02:08:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:08:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2023-11-12 02:08:07,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:07,246 INFO L225 Difference]: With dead ends: 187 [2023-11-12 02:08:07,246 INFO L226 Difference]: Without dead ends: 127 [2023-11-12 02:08:07,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:08:07,248 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 156 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:07,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 451 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:08:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-12 02:08:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-12 02:08:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 91 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-12 02:08:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 151 transitions. [2023-11-12 02:08:07,269 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 151 transitions. Word has length 99 [2023-11-12 02:08:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:07,269 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 151 transitions. [2023-11-12 02:08:07,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-12 02:08:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 151 transitions. [2023-11-12 02:08:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-12 02:08:07,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:07,272 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:07,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:07,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:08:07,483 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:07,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:07,483 INFO L85 PathProgramCache]: Analyzing trace with hash -564772413, now seen corresponding path program 1 times [2023-11-12 02:08:07,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:07,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703068040] [2023-11-12 02:08:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:07,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:07,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:07,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650203976] [2023-11-12 02:08:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:07,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:07,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:07,638 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:07,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:08:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:08,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-12 02:08:08,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:08,613 INFO L351 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 [2023-11-12 02:08:08,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 02:08:08,675 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:08:08,676 INFO L351 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 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 02:08:08,753 INFO L322 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2023-11-12 02:08:08,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 02:08:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 02:08:09,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:09,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 93 [2023-11-12 02:08:10,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-11-12 02:08:10,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-11-12 02:08:10,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-12 02:08:10,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2023-11-12 02:08:10,561 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-11-12 02:08:10,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-12 02:08:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 02:08:10,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:10,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703068040] [2023-11-12 02:08:10,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:10,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650203976] [2023-11-12 02:08:10,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650203976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:10,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:08:10,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-11-12 02:08:10,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68036363] [2023-11-12 02:08:10,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:10,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:08:10,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:10,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:08:10,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:08:10,950 INFO L87 Difference]: Start difference. First operand 127 states and 151 transitions. Second operand has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 26 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2023-11-12 02:08:12,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:12,754 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2023-11-12 02:08:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:08:12,754 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 26 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 114 [2023-11-12 02:08:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:12,756 INFO L225 Difference]: With dead ends: 159 [2023-11-12 02:08:12,756 INFO L226 Difference]: Without dead ends: 147 [2023-11-12 02:08:12,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 02:08:12,758 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 42 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:12,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1606 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-12 02:08:12,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-12 02:08:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2023-11-12 02:08:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-12 02:08:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2023-11-12 02:08:12,784 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 114 [2023-11-12 02:08:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:12,785 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2023-11-12 02:08:12,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 26 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2023-11-12 02:08:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2023-11-12 02:08:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-12 02:08:12,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:12,787 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:12,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-12 02:08:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:08:13,012 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:13,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash -582835346, now seen corresponding path program 2 times [2023-11-12 02:08:13,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:13,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69839227] [2023-11-12 02:08:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:13,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:13,110 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:13,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823372677] [2023-11-12 02:08:13,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:08:13,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:13,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:13,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:13,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:08:14,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:08:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:08:14,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 2386 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-12 02:08:14,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:14,461 INFO L351 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 [2023-11-12 02:08:14,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 02:08:14,531 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:08:14,531 INFO L351 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 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 02:08:14,604 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:08:14,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 02:08:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 02:08:15,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:16,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 89 [2023-11-12 02:08:17,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-12 02:08:17,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2023-11-12 02:08:17,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-11-12 02:08:17,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2023-11-12 02:08:17,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-12 02:08:17,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-11-12 02:08:17,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-12 02:08:17,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2023-11-12 02:08:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 02:08:18,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:18,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69839227] [2023-11-12 02:08:18,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:18,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823372677] [2023-11-12 02:08:18,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823372677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:18,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:08:18,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 37 [2023-11-12 02:08:18,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815865789] [2023-11-12 02:08:18,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:18,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-12 02:08:18,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-12 02:08:18,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 02:08:18,145 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 33 states have internal predecessors, (104), 8 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-12 02:08:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:21,558 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2023-11-12 02:08:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-12 02:08:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 33 states have internal predecessors, (104), 8 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) Word has length 117 [2023-11-12 02:08:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:21,560 INFO L225 Difference]: With dead ends: 155 [2023-11-12 02:08:21,560 INFO L226 Difference]: Without dead ends: 148 [2023-11-12 02:08:21,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2023-11-12 02:08:21,563 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 52 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:21,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 2368 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-12 02:08:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-12 02:08:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 139. [2023-11-12 02:08:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 102 states have internal predecessors, (119), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-12 02:08:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2023-11-12 02:08:21,591 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 117 [2023-11-12 02:08:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:21,592 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2023-11-12 02:08:21,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.888888888888889) internal successors, (104), 33 states have internal predecessors, (104), 8 states have call successors, (25), 3 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-12 02:08:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2023-11-12 02:08:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-12 02:08:21,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:21,594 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:21,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:21,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:08:21,807 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:21,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1824760349, now seen corresponding path program 3 times [2023-11-12 02:08:21,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:21,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800742114] [2023-11-12 02:08:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:21,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:21,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686466192] [2023-11-12 02:08:21,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:08:21,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:21,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:21,902 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:21,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:08:23,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:08:23,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:08:23,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 2357 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-12 02:08:23,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:23,799 INFO L351 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 [2023-11-12 02:08:23,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 02:08:23,859 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:08:23,860 INFO L351 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 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 02:08:23,900 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:08:23,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 02:08:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-12 02:08:23,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:24,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:24,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800742114] [2023-11-12 02:08:24,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:24,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686466192] [2023-11-12 02:08:24,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686466192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:08:24,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:08:24,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-12 02:08:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631266684] [2023-11-12 02:08:24,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:24,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:08:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:08:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:08:24,172 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-12 02:08:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:24,577 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2023-11-12 02:08:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:08:24,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 120 [2023-11-12 02:08:24,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:24,580 INFO L225 Difference]: With dead ends: 167 [2023-11-12 02:08:24,580 INFO L226 Difference]: Without dead ends: 142 [2023-11-12 02:08:24,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:08:24,581 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 28 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:24,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1094 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:08:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-12 02:08:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-11-12 02:08:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 states have internal predecessors, (120), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-12 02:08:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2023-11-12 02:08:24,607 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 120 [2023-11-12 02:08:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:24,607 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2023-11-12 02:08:24,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-12 02:08:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2023-11-12 02:08:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-12 02:08:24,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:24,610 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:24,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:24,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:24,823 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:24,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1076191317, now seen corresponding path program 4 times [2023-11-12 02:08:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:24,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913877539] [2023-11-12 02:08:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:24,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:24,897 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417212947] [2023-11-12 02:08:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:08:24,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:24,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:24,899 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:24,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb9bd75-f668-44a5-b1b7-e48a8f06179d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:08:25,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:08:25,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:08:25,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 2412 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-12 02:08:25,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:25,900 INFO L351 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 [2023-11-12 02:08:25,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 02:08:25,947 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:08:25,947 INFO L351 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 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 02:08:25,989 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:08:25,989 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 02:08:26,036 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:08:26,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-12 02:08:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-12 02:08:26,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:28,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 111 [2023-11-12 02:08:29,365 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-11-12 02:08:29,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2023-11-12 02:08:29,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-11-12 02:08:29,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2023-11-12 02:08:29,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-12 02:08:29,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2023-11-12 02:08:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 02:08:30,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:30,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913877539] [2023-11-12 02:08:30,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:30,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417212947] [2023-11-12 02:08:30,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417212947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:30,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:08:30,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2023-11-12 02:08:30,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188028021] [2023-11-12 02:08:30,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:30,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-12 02:08:30,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:30,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-12 02:08:30,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 02:08:30,033 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 34 states have internal predecessors, (107), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24)