./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 ae6a7f725008f5fcf9222f13f2d7c991c80e8eaa3720df3bf27eb342532d24e9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:35:59,962 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:36:00,061 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-06 22:36:00,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:36:00,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:36:00,091 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:36:00,092 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:36:00,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:36:00,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:36:00,094 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:36:00,095 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:36:00,095 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:36:00,096 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:36:00,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:36:00,097 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:36:00,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:36:00,098 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:36:00,098 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:36:00,099 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:36:00,099 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:36:00,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:36:00,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:36:00,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:36:00,101 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:36:00,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:36:00,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:36:00,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:36:00,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:36:00,104 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:36:00,104 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:36:00,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:36:00,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:36:00,105 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:36:00,106 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:36:00,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:36:00,107 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:36:00,107 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_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae6a7f725008f5fcf9222f13f2d7c991c80e8eaa3720df3bf27eb342532d24e9 [2023-11-06 22:36:00,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:36:00,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:36:00,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:36:00,445 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:36:00,446 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:36:00,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness_negated.i [2023-11-06 22:36:03,644 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:36:04,243 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:36:04,244 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness_negated.i [2023-11-06 22:36:04,302 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/data/87ef8b116/54f94c47a80c42e9a90b6d12dde4c29a/FLAG27ccccdef [2023-11-06 22:36:04,323 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/data/87ef8b116/54f94c47a80c42e9a90b6d12dde4c29a [2023-11-06 22:36:04,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:36:04,332 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:36:04,333 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:36:04,333 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:36:04,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:36:04,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:04" (1/1) ... [2023-11-06 22:36:04,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f6f174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:04, skipping insertion in model container [2023-11-06 22:36:04,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:04" (1/1) ... [2023-11-06 22:36:04,524 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:36:04,779 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_f793b5a3-871e-4703-9556-86b691ab8e51/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness_negated.i[4492,4505] [2023-11-06 22:36:04,788 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_f793b5a3-871e-4703-9556-86b691ab8e51/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness_negated.i[4552,4565] [2023-11-06 22:36:05,853 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:05,854 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:05,854 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:05,855 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:05,857 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:05,873 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:05,874 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:05,876 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:05,877 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:06,328 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-06 22:36:06,329 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-06 22:36:06,331 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-06 22:36:06,332 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-06 22:36:06,334 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-06 22:36:06,335 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-06 22:36:06,336 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-06 22:36:06,337 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-06 22:36:06,338 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-06 22:36:06,339 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-06 22:36:06,729 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:06,737 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:06,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:36:06,964 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:36:06,989 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_f793b5a3-871e-4703-9556-86b691ab8e51/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness_negated.i[4492,4505] [2023-11-06 22:36:06,990 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_f793b5a3-871e-4703-9556-86b691ab8e51/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness_negated.i[4552,4565] [2023-11-06 22:36:07,033 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,034 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,035 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,035 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,036 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,047 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,048 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,049 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,053 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,110 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-06 22:36:07,111 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-06 22:36:07,111 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-06 22:36:07,112 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-06 22:36:07,113 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-06 22:36:07,114 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-06 22:36:07,117 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-06 22:36:07,118 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-06 22:36:07,118 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-06 22:36:07,120 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-06 22:36:07,223 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8269] [2023-11-06 22:36:07,225 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,226 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 22:36:07,238 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8755-8766] [2023-11-06 22:36:07,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:36:07,522 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,522 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,522 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,522 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,522 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,522 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,523 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,523 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,523 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,523 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,523 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,523 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,524 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,524 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,524 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,524 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,524 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,524 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:36:07,533 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:36:07,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07 WrapperNode [2023-11-06 22:36:07,534 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:36:07,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:36:07,535 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:36:07,535 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:36:07,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,651 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,778 INFO L138 Inliner]: procedures = 689, calls = 2640, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 874 [2023-11-06 22:36:07,778 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:36:07,780 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:36:07,780 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:36:07,780 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:36:07,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,812 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,879 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,906 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,912 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,925 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:36:07,926 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:36:07,926 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:36:07,926 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:36:07,927 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (1/1) ... [2023-11-06 22:36:07,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:36:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:07,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:36:07,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:36:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-06 22:36:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-06 22:36:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:36:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-06 22:36:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-06 22:36:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-11-06 22:36:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-06 22:36:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-06 22:36:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:36:08,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-06 22:36:08,009 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-06 22:36:08,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:36:08,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:36:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:36:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:36:08,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:36:08,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:36:08,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:36:08,011 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-06 22:36:08,012 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-06 22:36:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-06 22:36:08,012 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-06 22:36:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-06 22:36:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-06 22:36:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:36:08,014 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:36:08,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:36:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:36:08,015 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2023-11-06 22:36:08,015 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2023-11-06 22:36:08,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 22:36:08,016 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-06 22:36:08,016 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-06 22:36:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-06 22:36:08,017 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-06 22:36:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:36:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2023-11-06 22:36:08,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:36:08,372 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:36:08,376 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:36:10,335 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:36:10,347 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:36:10,348 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:36:10,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:10 BoogieIcfgContainer [2023-11-06 22:36:10,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:36:10,358 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:36:10,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:36:10,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:36:10,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:36:04" (1/3) ... [2023-11-06 22:36:10,365 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c21998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:10, skipping insertion in model container [2023-11-06 22:36:10,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:07" (2/3) ... [2023-11-06 22:36:10,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c21998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:10, skipping insertion in model container [2023-11-06 22:36:10,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:10" (3/3) ... [2023-11-06 22:36:10,367 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_harness_negated.i [2023-11-06 22:36:10,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:36:10,388 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:36:10,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:36:10,476 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=LoopsAndPotentialCycles, 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;@22000e9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:36:10,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:36:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-06 22:36:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 22:36:10,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:10,503 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 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] [2023-11-06 22:36:10,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:10,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash 259728785, now seen corresponding path program 1 times [2023-11-06 22:36:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105685601] [2023-11-06 22:36:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:10,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:11,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:36:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:36:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:36:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:36:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:36:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:36:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-06 22:36:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 22:36:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 22:36:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 22:36:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-06 22:36:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:36:12,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:12,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105685601] [2023-11-06 22:36:12,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105685601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:12,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007136120] [2023-11-06 22:36:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:12,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:12,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:12,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:12,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:36:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:12,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:36:13,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:36:13,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:36:13,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007136120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:36:13,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:36:13,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-06 22:36:13,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748821868] [2023-11-06 22:36:13,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:36:13,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:36:13,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:36:13,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:36:13,210 INFO L87 Difference]: Start difference. First operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 22:36:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:13,634 INFO L93 Difference]: Finished difference Result 258 states and 370 transitions. [2023-11-06 22:36:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:36:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2023-11-06 22:36:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:13,656 INFO L225 Difference]: With dead ends: 258 [2023-11-06 22:36:13,656 INFO L226 Difference]: Without dead ends: 127 [2023-11-06 22:36:13,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:36:13,675 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 200 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:13,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 466 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:36:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-06 22:36:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-06 22:36:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 85 states have internal predecessors, (104), 32 states have call successors, (32), 10 states have call predecessors, (32), 11 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2023-11-06 22:36:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2023-11-06 22:36:13,764 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 77 [2023-11-06 22:36:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:13,765 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2023-11-06 22:36:13,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 22:36:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2023-11-06 22:36:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-06 22:36:13,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:13,778 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:13,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:13,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:36:13,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:13,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1492783356, now seen corresponding path program 1 times [2023-11-06 22:36:13,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:13,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548290161] [2023-11-06 22:36:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:36:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:36:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:36:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:36:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:36:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:36:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 22:36:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 22:36:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 22:36:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-06 22:36:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-06 22:36:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:36:14,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:14,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548290161] [2023-11-06 22:36:14,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548290161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:14,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42803582] [2023-11-06 22:36:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:14,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:14,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:14,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:14,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:36:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:15,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:36:15,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 22:36:15,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:36:15,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42803582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:36:15,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:36:15,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-11-06 22:36:15,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017134572] [2023-11-06 22:36:15,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:36:15,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:36:15,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:36:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:36:15,727 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-06 22:36:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:16,128 INFO L93 Difference]: Finished difference Result 220 states and 297 transitions. [2023-11-06 22:36:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:36:16,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2023-11-06 22:36:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:16,132 INFO L225 Difference]: With dead ends: 220 [2023-11-06 22:36:16,132 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 22:36:16,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:36:16,134 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 204 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:16,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 640 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:36:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 22:36:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-06 22:36:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-06 22:36:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2023-11-06 22:36:16,151 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 83 [2023-11-06 22:36:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:16,152 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2023-11-06 22:36:16,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-06 22:36:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2023-11-06 22:36:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 22:36:16,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:16,154 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 22:36:16,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:16,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:16,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:16,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1451742418, now seen corresponding path program 1 times [2023-11-06 22:36:16,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:16,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443154701] [2023-11-06 22:36:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:36:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:36:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:36:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:36:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:36:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:36:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 22:36:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 22:36:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-06 22:36:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 22:36:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 22:36:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 22:36:19,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:19,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443154701] [2023-11-06 22:36:19,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443154701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:19,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524589355] [2023-11-06 22:36:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:19,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:19,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:19,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:19,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:36:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:20,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-06 22:36:20,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:20,801 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 8 treesize of output 1 [2023-11-06 22:36:22,641 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:36:22,642 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 74 treesize of output 58 [2023-11-06 22:36:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:36:22,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:24,193 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 24 [2023-11-06 22:36:24,200 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 8 treesize of output 6 [2023-11-06 22:36:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-06 22:36:24,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524589355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:24,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:24,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 25] total 52 [2023-11-06 22:36:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190431573] [2023-11-06 22:36:24,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:24,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-06 22:36:24,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-06 22:36:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2450, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 22:36:24,710 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 52 states, 45 states have (on average 2.911111111111111) internal successors, (131), 43 states have internal predecessors, (131), 19 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (31), 17 states have call predecessors, (31), 16 states have call successors, (31) [2023-11-06 22:36:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:38,560 INFO L93 Difference]: Finished difference Result 419 states and 581 transitions. [2023-11-06 22:36:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-06 22:36:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 45 states have (on average 2.911111111111111) internal successors, (131), 43 states have internal predecessors, (131), 19 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (31), 17 states have call predecessors, (31), 16 states have call successors, (31) Word has length 95 [2023-11-06 22:36:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:38,566 INFO L225 Difference]: With dead ends: 419 [2023-11-06 22:36:38,566 INFO L226 Difference]: Without dead ends: 329 [2023-11-06 22:36:38,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 180 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1050, Invalid=9870, Unknown=0, NotChecked=0, Total=10920 [2023-11-06 22:36:38,573 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 988 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 5140 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 5538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 5140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:38,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 1220 Invalid, 5538 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [398 Valid, 5140 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-11-06 22:36:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-06 22:36:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 242. [2023-11-06 22:36:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 165 states have (on average 1.2606060606060605) internal successors, (208), 166 states have internal predecessors, (208), 58 states have call successors, (58), 18 states have call predecessors, (58), 18 states have return successors, (62), 57 states have call predecessors, (62), 56 states have call successors, (62) [2023-11-06 22:36:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 328 transitions. [2023-11-06 22:36:38,632 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 328 transitions. Word has length 95 [2023-11-06 22:36:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:38,633 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 328 transitions. [2023-11-06 22:36:38,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 45 states have (on average 2.911111111111111) internal successors, (131), 43 states have internal predecessors, (131), 19 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (31), 17 states have call predecessors, (31), 16 states have call successors, (31) [2023-11-06 22:36:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 328 transitions. [2023-11-06 22:36:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 22:36:38,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:38,636 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 22:36:38,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:38,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:38,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:38,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash -542402288, now seen corresponding path program 1 times [2023-11-06 22:36:38,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:38,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698272561] [2023-11-06 22:36:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:38,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:36:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:36:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:36:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:36:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:36:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:36:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 22:36:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 22:36:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-06 22:36:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 22:36:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 22:36:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:36:41,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:41,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698272561] [2023-11-06 22:36:41,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698272561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:41,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675945244] [2023-11-06 22:36:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:41,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:41,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:41,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:36:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:42,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:36:42,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:42,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:36:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:36:42,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:36:42,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675945244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:36:42,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:36:42,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 19 [2023-11-06 22:36:42,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69191459] [2023-11-06 22:36:42,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:36:42,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:36:42,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:36:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:36:42,960 INFO L87 Difference]: Start difference. First operand 242 states and 328 transitions. Second operand has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-06 22:36:45,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:36:47,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:36:50,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:36:52,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:36:54,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:36:56,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:36:58,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:37:00,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:37:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:01,459 INFO L93 Difference]: Finished difference Result 582 states and 801 transitions. [2023-11-06 22:37:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:37:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 95 [2023-11-06 22:37:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:01,464 INFO L225 Difference]: With dead ends: 582 [2023-11-06 22:37:01,465 INFO L226 Difference]: Without dead ends: 362 [2023-11-06 22:37:01,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:37:01,467 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 215 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 48 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:01,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1033 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 768 Invalid, 8 Unknown, 0 Unchecked, 18.2s Time] [2023-11-06 22:37:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-06 22:37:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 353. [2023-11-06 22:37:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 244 states have (on average 1.2581967213114753) internal successors, (307), 245 states have internal predecessors, (307), 83 states have call successors, (83), 26 states have call predecessors, (83), 25 states have return successors, (89), 81 states have call predecessors, (89), 79 states have call successors, (89) [2023-11-06 22:37:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 479 transitions. [2023-11-06 22:37:01,540 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 479 transitions. Word has length 95 [2023-11-06 22:37:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:01,541 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 479 transitions. [2023-11-06 22:37:01,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-06 22:37:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 479 transitions. [2023-11-06 22:37:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-06 22:37:01,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:01,544 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 22:37:01,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:01,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:01,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:01,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1349173359, now seen corresponding path program 1 times [2023-11-06 22:37:01,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:01,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925569899] [2023-11-06 22:37:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:02,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:37:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:02,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:02,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:37:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:02,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:37:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:02,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:02,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:37:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:03,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 22:37:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:03,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 22:37:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:03,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-06 22:37:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-06 22:37:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:03,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-06 22:37:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:03,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-11-06 22:37:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-06 22:37:03,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:03,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925569899] [2023-11-06 22:37:03,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925569899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:03,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597485347] [2023-11-06 22:37:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:03,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:03,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:03,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:03,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:37:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:03,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:37:03,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:37:03,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:03,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597485347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:03,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:03,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-11-06 22:37:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611365118] [2023-11-06 22:37:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:03,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:03,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:03,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:37:03,876 INFO L87 Difference]: Start difference. First operand 353 states and 479 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-06 22:37:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:04,764 INFO L93 Difference]: Finished difference Result 743 states and 1051 transitions. [2023-11-06 22:37:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2023-11-06 22:37:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:04,770 INFO L225 Difference]: With dead ends: 743 [2023-11-06 22:37:04,770 INFO L226 Difference]: Without dead ends: 419 [2023-11-06 22:37:04,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:37:04,773 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 42 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:04,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 550 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:37:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-06 22:37:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 372. [2023-11-06 22:37:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 263 states have (on average 1.2547528517110267) internal successors, (330), 264 states have internal predecessors, (330), 83 states have call successors, (83), 26 states have call predecessors, (83), 25 states have return successors, (89), 81 states have call predecessors, (89), 79 states have call successors, (89) [2023-11-06 22:37:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 502 transitions. [2023-11-06 22:37:04,879 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 502 transitions. Word has length 106 [2023-11-06 22:37:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:04,881 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 502 transitions. [2023-11-06 22:37:04,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-06 22:37:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 502 transitions. [2023-11-06 22:37:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-06 22:37:04,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:04,886 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 22:37:04,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:05,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:05,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:05,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1729640211, now seen corresponding path program 1 times [2023-11-06 22:37:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:05,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713224980] [2023-11-06 22:37:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:05,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:37:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:37:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:37:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:37:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 22:37:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 22:37:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-06 22:37:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-06 22:37:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-06 22:37:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-11-06 22:37:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-06 22:37:06,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:06,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713224980] [2023-11-06 22:37:06,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713224980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:06,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534190472] [2023-11-06 22:37:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:06,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:06,375 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:06,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:37:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:06,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 2654 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:37:06,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:07,311 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 17 treesize of output 9 [2023-11-06 22:37:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 22:37:07,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:07,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534190472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:07,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:07,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2023-11-06 22:37:07,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477528840] [2023-11-06 22:37:07,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:07,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:37:07,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:37:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:37:07,347 INFO L87 Difference]: Start difference. First operand 372 states and 502 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-06 22:37:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:09,561 INFO L93 Difference]: Finished difference Result 661 states and 898 transitions. [2023-11-06 22:37:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:37:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 106 [2023-11-06 22:37:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:09,567 INFO L225 Difference]: With dead ends: 661 [2023-11-06 22:37:09,567 INFO L226 Difference]: Without dead ends: 527 [2023-11-06 22:37:09,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:37:09,570 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 262 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:09,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1394 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 22:37:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-11-06 22:37:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 480. [2023-11-06 22:37:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 341 states have (on average 1.249266862170088) internal successors, (426), 344 states have internal predecessors, (426), 105 states have call successors, (105), 32 states have call predecessors, (105), 33 states have return successors, (119), 103 states have call predecessors, (119), 100 states have call successors, (119) [2023-11-06 22:37:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 650 transitions. [2023-11-06 22:37:09,657 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 650 transitions. Word has length 106 [2023-11-06 22:37:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:09,658 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 650 transitions. [2023-11-06 22:37:09,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-06 22:37:09,658 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 650 transitions. [2023-11-06 22:37:09,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-06 22:37:09,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:09,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 22:37:09,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:09,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:09,872 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:09,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash -656869295, now seen corresponding path program 1 times [2023-11-06 22:37:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:09,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457547208] [2023-11-06 22:37:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:09,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:10,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:37:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:10,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:10,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:37:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:10,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:37:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:10,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:10,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:37:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:10,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 22:37:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:11,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-06 22:37:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:11,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-06 22:37:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:11,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-06 22:37:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:11,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-06 22:37:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:11,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-11-06 22:37:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-06 22:37:11,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:11,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457547208] [2023-11-06 22:37:11,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457547208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167714406] [2023-11-06 22:37:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:11,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:11,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:37:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:11,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 2649 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:37:11,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-06 22:37:11,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167714406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:11,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:11,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2023-11-06 22:37:11,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642453721] [2023-11-06 22:37:11,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:11,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:37:11,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:11,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:37:11,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:37:11,756 INFO L87 Difference]: Start difference. First operand 480 states and 650 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-06 22:37:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:11,955 INFO L93 Difference]: Finished difference Result 971 states and 1329 transitions. [2023-11-06 22:37:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:37:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-11-06 22:37:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:11,961 INFO L225 Difference]: With dead ends: 971 [2023-11-06 22:37:11,961 INFO L226 Difference]: Without dead ends: 520 [2023-11-06 22:37:11,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:37:11,964 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 13 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:11,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1222 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-11-06 22:37:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 495. [2023-11-06 22:37:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 353 states have (on average 1.2407932011331444) internal successors, (438), 359 states have internal predecessors, (438), 105 states have call successors, (105), 32 states have call predecessors, (105), 36 states have return successors, (130), 103 states have call predecessors, (130), 100 states have call successors, (130) [2023-11-06 22:37:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 673 transitions. [2023-11-06 22:37:12,062 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 673 transitions. Word has length 106 [2023-11-06 22:37:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:12,062 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 673 transitions. [2023-11-06 22:37:12,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-06 22:37:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 673 transitions. [2023-11-06 22:37:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 22:37:12,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:12,066 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 22:37:12,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:12,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:12,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:12,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:12,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1407356234, now seen corresponding path program 1 times [2023-11-06 22:37:12,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:12,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478295632] [2023-11-06 22:37:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:12,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:37:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:37:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:37:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:37:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 22:37:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-06 22:37:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-06 22:37:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-06 22:37:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-06 22:37:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-06 22:37:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 22:37:12,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:12,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478295632] [2023-11-06 22:37:12,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478295632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:12,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987623494] [2023-11-06 22:37:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:12,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:12,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:12,700 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:12,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:37:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:13,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:37:13,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:37:13,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:13,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987623494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:13,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:13,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-06 22:37:13,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100392294] [2023-11-06 22:37:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:13,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:37:13,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:37:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:13,291 INFO L87 Difference]: Start difference. First operand 495 states and 673 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-06 22:37:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:13,373 INFO L93 Difference]: Finished difference Result 905 states and 1257 transitions. [2023-11-06 22:37:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2023-11-06 22:37:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:13,378 INFO L225 Difference]: With dead ends: 905 [2023-11-06 22:37:13,378 INFO L226 Difference]: Without dead ends: 437 [2023-11-06 22:37:13,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:37:13,381 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 9 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:13,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 477 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-06 22:37:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 410. [2023-11-06 22:37:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 296 states have (on average 1.2263513513513513) internal successors, (363), 301 states have internal predecessors, (363), 83 states have call successors, (83), 27 states have call predecessors, (83), 30 states have return successors, (103), 81 states have call predecessors, (103), 79 states have call successors, (103) [2023-11-06 22:37:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 549 transitions. [2023-11-06 22:37:13,461 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 549 transitions. Word has length 108 [2023-11-06 22:37:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:13,463 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 549 transitions. [2023-11-06 22:37:13,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-06 22:37:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 549 transitions. [2023-11-06 22:37:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 22:37:13,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:13,467 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 22:37:13,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:13,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:13,677 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:13,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1584662840, now seen corresponding path program 1 times [2023-11-06 22:37:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:13,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996025561] [2023-11-06 22:37:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:13,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:13,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:37:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:37:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:37:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:37:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 22:37:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-06 22:37:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-06 22:37:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-06 22:37:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-06 22:37:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-06 22:37:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-06 22:37:14,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:14,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996025561] [2023-11-06 22:37:14,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996025561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:14,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385259226] [2023-11-06 22:37:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:14,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:14,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:14,116 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:14,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:37:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:14,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 2666 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:37:14,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:37:14,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:14,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385259226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:14,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:14,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-06 22:37:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853493524] [2023-11-06 22:37:14,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:14,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:37:14,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:37:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:14,683 INFO L87 Difference]: Start difference. First operand 410 states and 549 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-06 22:37:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:14,748 INFO L93 Difference]: Finished difference Result 691 states and 924 transitions. [2023-11-06 22:37:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:14,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2023-11-06 22:37:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:14,751 INFO L225 Difference]: With dead ends: 691 [2023-11-06 22:37:14,752 INFO L226 Difference]: Without dead ends: 328 [2023-11-06 22:37:14,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:37:14,754 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 28 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:14,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 495 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-11-06 22:37:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 306. [2023-11-06 22:37:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 222 states have (on average 1.2162162162162162) internal successors, (270), 225 states have internal predecessors, (270), 61 states have call successors, (61), 21 states have call predecessors, (61), 22 states have return successors, (70), 59 states have call predecessors, (70), 58 states have call successors, (70) [2023-11-06 22:37:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 401 transitions. [2023-11-06 22:37:14,795 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 401 transitions. Word has length 108 [2023-11-06 22:37:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:14,796 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 401 transitions. [2023-11-06 22:37:14,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-06 22:37:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 401 transitions. [2023-11-06 22:37:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 22:37:14,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:14,798 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 22:37:14,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:15,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:15,013 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:15,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:15,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1507762042, now seen corresponding path program 1 times [2023-11-06 22:37:15,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:15,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864602759] [2023-11-06 22:37:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:15,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:37:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:37:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 22:37:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 22:37:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 22:37:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 22:37:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-06 22:37:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:20,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-06 22:37:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-06 22:37:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:20,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-06 22:37:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-06 22:37:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-06 22:37:20,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:20,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864602759] [2023-11-06 22:37:20,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864602759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:20,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063042149] [2023-11-06 22:37:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:20,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:20,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:20,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:20,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f793b5a3-871e-4703-9556-86b691ab8e51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:37:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:21,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 2661 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-06 22:37:21,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:21,350 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 15 treesize of output 1 [2023-11-06 22:37:21,356 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:37:26,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-06 22:37:26,561 INFO L322 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2023-11-06 22:37:26,562 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 3 case distinctions, treesize of input 32 treesize of output 44 [2023-11-06 22:37:26,596 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 12 treesize of output 8 [2023-11-06 22:37:26,726 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 12 treesize of output 8 [2023-11-06 22:37:29,239 INFO L322 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2023-11-06 22:37:29,240 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 5 case distinctions, treesize of input 85 treesize of output 93 [2023-11-06 22:37:29,269 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:37:29,270 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 1 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 22:37:29,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 105 [2023-11-06 22:37:29,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 50 [2023-11-06 22:37:29,625 INFO L322 Elim1Store]: treesize reduction 94, result has 19.7 percent of original size [2023-11-06 22:37:29,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 126 [2023-11-06 22:37:30,344 INFO L322 Elim1Store]: treesize reduction 428, result has 38.1 percent of original size [2023-11-06 22:37:30,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 180 treesize of output 359 [2023-11-06 22:38:05,795 WARN L861 $PredicateComparison]: unable to prove that (or (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse0 (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))) (and (not (= (mod (select .cse0 16) 18446744073709551616) 0)) (exists ((v_prenex_14 Int)) (let ((.cse1 (mod (select .cse0 0) 18446744073709551616))) (and (not (= (+ v_prenex_14 .cse1) 18446744073709551624)) (= (select .cse0 8) (select .cse0 (+ (- 18446744073709551616) v_prenex_14 .cse1)))))) (not (= v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 0))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse2 (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))) (and (not (= (mod (select .cse2 16) 18446744073709551616) 0)) (not (= v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 0)) (exists ((v_prenex_15 Int)) (= (select .cse2 8) (select .cse2 (+ (- 18446744073709551616) v_prenex_15 (mod (select .cse2 0) 18446744073709551616)))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse3 (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))) (and (not (= (mod (select .cse3 16) 18446744073709551616) 0)) (exists ((v_prenex_9 Int)) (= (select .cse3 8) (select .cse3 (+ (- 18446744073709551616) (mod (select .cse3 0) 18446744073709551616) v_prenex_9)))) (not (= v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 0))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (let ((.cse6 (select |c_#memory_int| .cse5))) (let ((.cse4 (mod (select .cse6 0) 18446744073709551616))) (and (<= 9223372036854775808 .cse4) (not (= .cse5 0)) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.offset| Int)) (= (store .cse6 8 (select .cse6 (+ (- 18446744073709551616) .cse4 |ULTIMATE.start_save_byte_from_array_~array#1.offset|))) (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))) (not (= (mod (select .cse6 16) 18446744073709551616) 0))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (and (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 16) 18446744073709551616) 0)) (not (= .cse7 0)) (<= (mod (select (select |c_#memory_int| .cse7) 0) 18446744073709551616) 9223372036854775807)))) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.base| Int) (v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse8 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|))) (let ((.cse9 (mod (select .cse8 0) 18446744073709551616))) (and (not (= (mod (select .cse8 16) 18446744073709551616) 0)) (not (= |ULTIMATE.start_save_byte_from_array_~array#1.base| 0)) (<= .cse9 9223372036854775807) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.offset| Int)) (= (store .cse8 8 (select .cse8 (+ |ULTIMATE.start_save_byte_from_array_~array#1.offset| .cse9))) (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse10 (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))) (and (<= (mod (select .cse10 0) 18446744073709551616) 9223372036854775807) (not (= (mod (select .cse10 16) 18446744073709551616) 0)) (not (= v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 0))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse11 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (and (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 16) 18446744073709551616) 0)) (not (= .cse11 0)) (exists ((v_prenex_14 Int)) (let ((.cse12 (select |c_#memory_int| .cse11))) (let ((.cse13 (mod (select .cse12 0) 18446744073709551616))) (and (= (select .cse12 8) (select .cse12 (+ (- 18446744073709551616) .cse13 v_prenex_14))) (not (= 18446744073709551624 (+ .cse13 v_prenex_14)))))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse14 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (and (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 16) 18446744073709551616) 0)) (not (= .cse14 0)) (exists ((v_prenex_7 Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.base| Int)) (let ((.cse16 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (let ((.cse15 (mod (select .cse16 0) 18446744073709551616))) (and (<= .cse15 9223372036854775807) (= (select .cse16 8) (select (select |c_#memory_int| .cse14) (+ .cse15 v_prenex_7)))))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse17 (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))) (let ((.cse18 (select .cse17 8)) (.cse19 (mod (select .cse17 0) 18446744073709551616))) (and (not (= (mod (select .cse17 16) 18446744073709551616) 0)) (exists ((v_prenex_16 Int)) (= .cse18 (select .cse17 (+ v_prenex_16 .cse19)))) (exists ((v_prenex_17 Int)) (= .cse18 (select .cse17 (+ (- 18446744073709551616) v_prenex_17 .cse19)))) (not (= v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 0)))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse20 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (and (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 16) 18446744073709551616) 0)) (not (= .cse20 0)) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.offset| Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.base| Int)) (let ((.cse22 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))) (let ((.cse21 (mod (select .cse22 0) 18446744073709551616))) (and (<= 9223372036854775808 .cse21) (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| .cse20)) (= (select .cse22 8) (select (select |c_#memory_int| .cse20) (+ (- 18446744073709551616) |ULTIMATE.start_save_byte_from_array_~array#1.offset| .cse21)))))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse24 (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))) (let ((.cse23 (mod (select .cse24 0) 18446744073709551616))) (and (<= .cse23 9223372036854775807) (exists ((v_prenex_7 Int) (|ULTIMATE.start_save_byte_from_array_~array#1.base| Int)) (and (not (= |ULTIMATE.start_save_byte_from_array_~array#1.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9)) (= (select .cse24 8) (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ .cse23 v_prenex_7))))) (not (= (mod (select .cse24 16) 18446744073709551616) 0)))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse25 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (let ((.cse27 (select |c_#memory_int| .cse25))) (let ((.cse26 (select .cse27 8)) (.cse28 (mod (select .cse27 0) 18446744073709551616))) (and (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 16) 18446744073709551616) 0)) (not (= .cse25 0)) (exists ((v_prenex_17 Int)) (= .cse26 (select .cse27 (+ (- 18446744073709551616) .cse28 v_prenex_17)))) (exists ((v_prenex_16 Int)) (= .cse26 (select .cse27 (+ .cse28 v_prenex_16))))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse30 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (and (exists ((v_prenex_15 Int)) (let ((.cse29 (select |c_#memory_int| .cse30))) (= (select .cse29 8) (select .cse29 (+ (- 18446744073709551616) (mod (select .cse29 0) 18446744073709551616) v_prenex_15))))) (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 16) 18446744073709551616) 0)) (not (= .cse30 0))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse31 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (and (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 16) 18446744073709551616) 0)) (not (= .cse31 0)) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.offset| Int) (|ULTIMATE.start_save_byte_from_array_~storage#1.base| Int)) (and (not (= |ULTIMATE.start_save_byte_from_array_~storage#1.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9)) (= (let ((.cse32 (select |c_#memory_int| .cse31))) (store .cse32 8 (select .cse32 (+ (- 18446744073709551616) (mod (select .cse32 0) 18446744073709551616) |ULTIMATE.start_save_byte_from_array_~array#1.offset|)))) (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~storage#1.base|))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse33 (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9))) (let ((.cse34 (mod (select .cse33 0) 18446744073709551616))) (and (not (= (mod (select .cse33 16) 18446744073709551616) 0)) (<= 9223372036854775808 .cse34) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.offset| Int) (|ULTIMATE.start_save_byte_from_array_~array#1.base| Int)) (and (not (= |ULTIMATE.start_save_byte_from_array_~array#1.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9)) (not (= |ULTIMATE.start_save_byte_from_array_~array#1.base| 0)) (= (select .cse33 8) (select (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|) (+ (- 18446744073709551616) |ULTIMATE.start_save_byte_from_array_~array#1.offset| .cse34))))))))) (exists ((v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse36 (select (select |c_#memory_$Pointer$.base| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 8))) (and (not (= (mod (select (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9) 16) 18446744073709551616) 0)) (exists ((v_prenex_9 Int)) (let ((.cse35 (select |c_#memory_int| .cse36))) (= (select .cse35 (+ (- 18446744073709551616) (mod (select .cse35 0) 18446744073709551616) v_prenex_9)) (select .cse35 8)))) (not (= .cse36 0))))) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.base| Int) (v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9 Int)) (let ((.cse38 (select |c_#memory_int| |ULTIMATE.start_save_byte_from_array_~array#1.base|))) (let ((.cse37 (mod (select .cse38 0) 18446744073709551616))) (and (<= 9223372036854775808 .cse37) (not (= (mod (select .cse38 16) 18446744073709551616) 0)) (not (= |ULTIMATE.start_save_byte_from_array_~array#1.base| 0)) (exists ((|ULTIMATE.start_save_byte_from_array_~array#1.offset| Int)) (= (store .cse38 8 (select .cse38 (+ (- 18446744073709551616) |ULTIMATE.start_save_byte_from_array_~array#1.offset| .cse37))) (select |c_#memory_int| v_aws_byte_buf_write_~buf.base_BEFORE_CALL_9)))))))) is different from true [2023-11-06 22:38:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 72 proven. 12 refuted. 2 times theorem prover too weak. 11 trivial. 1 not checked. [2023-11-06 22:38:57,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:59,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063042149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:59,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:38:59,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 49 [2023-11-06 22:38:59,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104541903] [2023-11-06 22:38:59,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:59,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 22:38:59,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 22:38:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3066, Unknown=36, NotChecked=112, Total=3422 [2023-11-06 22:38:59,342 INFO L87 Difference]: Start difference. First operand 306 states and 401 transitions. Second operand has 49 states, 45 states have (on average 2.8) internal successors, (126), 40 states have internal predecessors, (126), 18 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (22), 14 states have call predecessors, (22), 16 states have call successors, (22) [2023-11-06 22:39:22,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:25,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:29,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:32,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:35,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:38,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:40,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:42,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:44,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:39:48,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]