./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 175c9418701070e8128f8ed008fd30685ed8c019e1010acc82e904c5730ef842 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:03:06,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:03:06,272 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-26 12:03:06,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:03:06,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:03:06,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:03:06,319 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:03:06,319 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:03:06,321 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:03:06,327 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:03:06,327 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:03:06,329 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:03:06,330 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:03:06,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:03:06,332 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:03:06,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:03:06,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:03:06,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:03:06,334 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:03:06,335 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:03:06,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:03:06,336 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:03:06,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:03:06,337 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:03:06,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:03:06,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:03:06,340 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:03:06,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:03:06,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:06,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:03:06,343 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:03:06,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:03:06,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:03:06,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:03:06,344 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:03:06,344 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:03:06,345 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:03:06,345 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:03:06,345 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:03:06,345 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_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 175c9418701070e8128f8ed008fd30685ed8c019e1010acc82e904c5730ef842 [2023-11-26 12:03:06,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:03:06,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:03:06,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:03:06,720 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:03:06,720 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:03:06,721 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i [2023-11-26 12:03:09,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:03:10,358 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:03:10,359 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i [2023-11-26 12:03:10,403 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/data/056b649fc/cb155648240e463db9128b4e55a3b14a/FLAG465be6a01 [2023-11-26 12:03:10,424 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/data/056b649fc/cb155648240e463db9128b4e55a3b14a [2023-11-26 12:03:10,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:03:10,431 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:03:10,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:10,432 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:03:10,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:03:10,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:10" (1/1) ... [2023-11-26 12:03:10,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc72539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:10, skipping insertion in model container [2023-11-26 12:03:10,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:10" (1/1) ... [2023-11-26 12:03:10,569 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:03:10,891 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_60aa909f-4c3a-4dce-ad3d-c830a443d363/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4505,4518] [2023-11-26 12:03:10,900 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_60aa909f-4c3a-4dce-ad3d-c830a443d363/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4565,4578] [2023-11-26 12:03:12,083 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,085 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,085 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,086 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,088 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,103 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,104 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,106 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,107 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,643 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 12:03:12,645 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 12:03:12,646 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 12:03:12,648 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 12:03:12,649 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 12:03:12,650 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 12:03:12,651 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 12:03:12,652 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 12:03:12,653 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 12:03:12,654 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 12:03:12,870 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,875 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:12,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:13,037 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:03:13,074 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_60aa909f-4c3a-4dce-ad3d-c830a443d363/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4505,4518] [2023-11-26 12:03:13,075 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_60aa909f-4c3a-4dce-ad3d-c830a443d363/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4565,4578] [2023-11-26 12:03:13,198 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,208 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,208 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,210 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,211 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,220 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,224 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,227 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,228 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,304 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 12:03:13,305 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 12:03:13,306 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 12:03:13,308 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 12:03:13,309 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 12:03:13,310 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 12:03:13,310 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 12:03:13,311 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 12:03:13,312 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 12:03:13,313 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 12:03:13,375 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,375 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:13,389 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7671-7682] [2023-11-26 12:03:13,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:13,820 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,820 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,821 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,821 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,821 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,821 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,821 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,821 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,822 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,822 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,823 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,824 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,824 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,824 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,824 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:13,833 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:03:13,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13 WrapperNode [2023-11-26 12:03:13,834 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:13,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:13,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:03:13,835 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:03:13,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:13,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,042 INFO L138 Inliner]: procedures = 688, calls = 1536, calls flagged for inlining = 52, calls inlined = 9, statements flattened = 764 [2023-11-26 12:03:14,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:14,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:03:14,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:03:14,044 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:03:14,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,066 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,184 INFO L175 MemorySlicer]: Split 300 memory accesses to 6 slices as follows [8, 2, 236, 46, 5, 3]. 79 percent of accesses are in the largest equivalence class. The 259 initializations are split as follows [2, 2, 236, 11, 5, 3]. The 7 writes are split as follows [1, 0, 0, 6, 0, 0]. [2023-11-26 12:03:14,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,238 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,293 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:03:14,305 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:03:14,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:03:14,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:03:14,306 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (1/1) ... [2023-11-26 12:03:14,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:14,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:14,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:03:14,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:03:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-26 12:03:14,398 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-26 12:03:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:03:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-26 12:03:14,399 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-26 12:03:14,400 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-26 12:03:14,401 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-26 12:03:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-26 12:03:14,401 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-26 12:03:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:03:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:03:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:03:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:03:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:03:14,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 12:03:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-26 12:03:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-26 12:03:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 12:03:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 12:03:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:03:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:03:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 12:03:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 12:03:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 12:03:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 12:03:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-26 12:03:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-26 12:03:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:03:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:03:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-26 12:03:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-26 12:03:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-26 12:03:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-26 12:03:14,407 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-26 12:03:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-26 12:03:14,407 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-26 12:03:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-26 12:03:14,408 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-26 12:03:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-26 12:03:14,408 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:03:14,409 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:03:14,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 12:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 12:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 12:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 12:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-26 12:03:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-26 12:03:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 12:03:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 12:03:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 12:03:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-26 12:03:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-26 12:03:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-26 12:03:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-26 12:03:14,412 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-26 12:03:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-26 12:03:14,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-26 12:03:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:03:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:03:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:03:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:03:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:03:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 12:03:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-26 12:03:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-26 12:03:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-26 12:03:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-26 12:03:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:03:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:03:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:03:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:03:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:03:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 12:03:14,800 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:03:14,802 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:03:15,770 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:03:15,928 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:03:15,931 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 12:03:15,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:15 BoogieIcfgContainer [2023-11-26 12:03:15,932 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:03:15,936 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:03:15,936 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:03:15,939 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:03:15,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:03:10" (1/3) ... [2023-11-26 12:03:15,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc9b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:15, skipping insertion in model container [2023-11-26 12:03:15,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:13" (2/3) ... [2023-11-26 12:03:15,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc9b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:15, skipping insertion in model container [2023-11-26 12:03:15,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:15" (3/3) ... [2023-11-26 12:03:15,945 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness_negated.i [2023-11-26 12:03:15,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:03:15,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:03:16,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:03:16,060 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@685ee6fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:03:16,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:03:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 121 states have (on average 1.28099173553719) internal successors, (155), 121 states have internal predecessors, (155), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 12:03:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-26 12:03:16,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:16,095 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:16,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:16,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash -955814862, now seen corresponding path program 1 times [2023-11-26 12:03:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:16,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103330753] [2023-11-26 12:03:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:16,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103330753] [2023-11-26 12:03:16,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 12:03:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740242968] [2023-11-26 12:03:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:16,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:16,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:16,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:16,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:03:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 12:03:17,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2023-11-26 12:03:17,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:17,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740242968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:17,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:17,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:03:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608459291] [2023-11-26 12:03:17,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:17,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:03:17,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:03:17,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:03:17,749 INFO L87 Difference]: Start difference. First operand has 199 states, 121 states have (on average 1.28099173553719) internal successors, (155), 121 states have internal predecessors, (155), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-26 12:03:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:18,175 INFO L93 Difference]: Finished difference Result 374 states and 564 transitions. [2023-11-26 12:03:18,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:03:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 128 [2023-11-26 12:03:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:18,192 INFO L225 Difference]: With dead ends: 374 [2023-11-26 12:03:18,193 INFO L226 Difference]: Without dead ends: 195 [2023-11-26 12:03:18,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:03:18,203 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:18,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 254 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:03:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-26 12:03:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-11-26 12:03:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 118 states have internal predecessors, (144), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 266 transitions. [2023-11-26 12:03:18,280 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 266 transitions. Word has length 128 [2023-11-26 12:03:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:18,282 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 266 transitions. [2023-11-26 12:03:18,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-26 12:03:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 266 transitions. [2023-11-26 12:03:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-26 12:03:18,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:18,287 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:18,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:18,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 12:03:18,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:18,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1820788207, now seen corresponding path program 1 times [2023-11-26 12:03:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:18,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300269688] [2023-11-26 12:03:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:18,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:18,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897766061] [2023-11-26 12:03:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:18,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:18,682 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:18,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:03:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:19,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 2434 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 12:03:19,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-26 12:03:19,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:19,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:19,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300269688] [2023-11-26 12:03:19,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:19,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897766061] [2023-11-26 12:03:19,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897766061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:19,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:19,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:03:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753727839] [2023-11-26 12:03:19,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:19,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:03:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:19,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:03:19,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:03:19,556 INFO L87 Difference]: Start difference. First operand 195 states and 266 transitions. Second operand has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2023-11-26 12:03:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:20,142 INFO L93 Difference]: Finished difference Result 358 states and 483 transitions. [2023-11-26 12:03:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:03:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 158 [2023-11-26 12:03:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:20,149 INFO L225 Difference]: With dead ends: 358 [2023-11-26 12:03:20,149 INFO L226 Difference]: Without dead ends: 195 [2023-11-26 12:03:20,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:03:20,154 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 9 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:20,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1207 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:03:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-26 12:03:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-11-26 12:03:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 116 states have (on average 1.2327586206896552) internal successors, (143), 118 states have internal predecessors, (143), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 265 transitions. [2023-11-26 12:03:20,181 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 265 transitions. Word has length 158 [2023-11-26 12:03:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:20,182 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 265 transitions. [2023-11-26 12:03:20,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2023-11-26 12:03:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 265 transitions. [2023-11-26 12:03:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-26 12:03:20,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:20,187 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:20,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:20,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:20,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2036283713, now seen corresponding path program 1 times [2023-11-26 12:03:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:20,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562951779] [2023-11-26 12:03:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:20,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:20,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636143399] [2023-11-26 12:03:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:20,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:20,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:20,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:03:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:21,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 2450 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 12:03:21,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-11-26 12:03:21,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:21,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562951779] [2023-11-26 12:03:21,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636143399] [2023-11-26 12:03:21,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636143399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:21,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:21,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:03:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229961632] [2023-11-26 12:03:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:21,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:03:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:03:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:03:21,328 INFO L87 Difference]: Start difference. First operand 195 states and 265 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 4 states have call successors, (31) [2023-11-26 12:03:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:21,770 INFO L93 Difference]: Finished difference Result 355 states and 481 transitions. [2023-11-26 12:03:21,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:03:21,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 4 states have call successors, (31) Word has length 162 [2023-11-26 12:03:21,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:21,774 INFO L225 Difference]: With dead ends: 355 [2023-11-26 12:03:21,774 INFO L226 Difference]: Without dead ends: 196 [2023-11-26 12:03:21,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:03:21,777 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 6 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:21,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 725 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:03:21,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-26 12:03:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-26 12:03:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 119 states have internal predecessors, (144), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 266 transitions. [2023-11-26 12:03:21,802 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 266 transitions. Word has length 162 [2023-11-26 12:03:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:21,803 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 266 transitions. [2023-11-26 12:03:21,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 4 states have call successors, (31) [2023-11-26 12:03:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 266 transitions. [2023-11-26 12:03:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-26 12:03:21,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:21,807 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:21,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:22,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:22,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:22,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -535335863, now seen corresponding path program 1 times [2023-11-26 12:03:22,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:22,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782738113] [2023-11-26 12:03:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:22,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:22,139 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:22,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822513967] [2023-11-26 12:03:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:22,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:22,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:22,141 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:22,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:03:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 2488 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 12:03:22,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 149 proven. 1 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-11-26 12:03:23,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2023-11-26 12:03:23,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782738113] [2023-11-26 12:03:23,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:23,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822513967] [2023-11-26 12:03:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822513967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:23,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:23,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-26 12:03:23,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239140704] [2023-11-26 12:03:23,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:23,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:03:23,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:03:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:03:23,582 INFO L87 Difference]: Start difference. First operand 196 states and 266 transitions. Second operand has 13 states, 11 states have (on average 7.0) internal successors, (77), 13 states have internal predecessors, (77), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-26 12:03:24,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:24,984 INFO L93 Difference]: Finished difference Result 362 states and 486 transitions. [2023-11-26 12:03:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:03:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 7.0) internal successors, (77), 13 states have internal predecessors, (77), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 164 [2023-11-26 12:03:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:24,989 INFO L225 Difference]: With dead ends: 362 [2023-11-26 12:03:24,989 INFO L226 Difference]: Without dead ends: 197 [2023-11-26 12:03:24,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:03:24,992 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 15 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:24,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1687 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 12:03:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-26 12:03:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-26 12:03:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 118 states have (on average 1.228813559322034) internal successors, (145), 120 states have internal predecessors, (145), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 267 transitions. [2023-11-26 12:03:25,015 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 267 transitions. Word has length 164 [2023-11-26 12:03:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:25,016 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 267 transitions. [2023-11-26 12:03:25,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 7.0) internal successors, (77), 13 states have internal predecessors, (77), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-26 12:03:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 267 transitions. [2023-11-26 12:03:25,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-26 12:03:25,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:25,020 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:25,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:25,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:25,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:25,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:25,246 INFO L85 PathProgramCache]: Analyzing trace with hash -934805695, now seen corresponding path program 2 times [2023-11-26 12:03:25,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:25,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815797282] [2023-11-26 12:03:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:25,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:25,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:25,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753249175] [2023-11-26 12:03:25,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:03:25,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:25,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:25,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:25,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:03:27,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:03:27,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:27,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 12:03:27,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-11-26 12:03:27,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-11-26 12:03:27,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815797282] [2023-11-26 12:03:27,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753249175] [2023-11-26 12:03:27,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753249175] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:27,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:27,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2023-11-26 12:03:27,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755437918] [2023-11-26 12:03:27,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 12:03:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 12:03:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:03:27,800 INFO L87 Difference]: Start difference. First operand 197 states and 267 transitions. Second operand has 17 states, 15 states have (on average 4.733333333333333) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-26 12:03:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:29,240 INFO L93 Difference]: Finished difference Result 364 states and 488 transitions. [2023-11-26 12:03:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:03:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.733333333333333) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 166 [2023-11-26 12:03:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:29,244 INFO L225 Difference]: With dead ends: 364 [2023-11-26 12:03:29,244 INFO L226 Difference]: Without dead ends: 198 [2023-11-26 12:03:29,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-26 12:03:29,246 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 12 mSDsluCounter, 2168 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:29,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2412 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 12:03:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-26 12:03:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-11-26 12:03:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 119 states have (on average 1.226890756302521) internal successors, (146), 121 states have internal predecessors, (146), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 268 transitions. [2023-11-26 12:03:29,265 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 268 transitions. Word has length 166 [2023-11-26 12:03:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:29,266 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 268 transitions. [2023-11-26 12:03:29,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.733333333333333) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-26 12:03:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 268 transitions. [2023-11-26 12:03:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-26 12:03:29,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:29,270 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:29,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:29,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:29,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:29,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash -284757943, now seen corresponding path program 3 times [2023-11-26 12:03:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:29,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045931115] [2023-11-26 12:03:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:29,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:29,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:29,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171067456] [2023-11-26 12:03:29,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:03:29,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:29,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:29,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:29,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:03:36,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 12:03:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:36,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 12:03:36,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-11-26 12:03:36,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-11-26 12:03:36,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045931115] [2023-11-26 12:03:36,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171067456] [2023-11-26 12:03:36,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171067456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:36,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:36,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-26 12:03:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912047076] [2023-11-26 12:03:36,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:36,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 12:03:36,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 12:03:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:03:36,895 INFO L87 Difference]: Start difference. First operand 198 states and 268 transitions. Second operand has 17 states, 15 states have (on average 4.666666666666667) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-26 12:03:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:38,509 INFO L93 Difference]: Finished difference Result 366 states and 490 transitions. [2023-11-26 12:03:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:03:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.666666666666667) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 168 [2023-11-26 12:03:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:38,512 INFO L225 Difference]: With dead ends: 366 [2023-11-26 12:03:38,512 INFO L226 Difference]: Without dead ends: 199 [2023-11-26 12:03:38,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:03:38,514 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 20 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:38,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2167 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-26 12:03:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-26 12:03:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2023-11-26 12:03:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 120 states have (on average 1.225) internal successors, (147), 122 states have internal predecessors, (147), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 269 transitions. [2023-11-26 12:03:38,529 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 269 transitions. Word has length 168 [2023-11-26 12:03:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:38,530 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 269 transitions. [2023-11-26 12:03:38,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.666666666666667) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-26 12:03:38,531 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 269 transitions. [2023-11-26 12:03:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-26 12:03:38,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:38,533 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:38,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:38,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:38,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:38,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -431094463, now seen corresponding path program 4 times [2023-11-26 12:03:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:38,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157922788] [2023-11-26 12:03:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:38,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:38,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139503411] [2023-11-26 12:03:38,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:03:38,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:38,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:38,846 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:38,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:03:39,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:03:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:39,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 12:03:39,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 39 proven. 10 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-11-26 12:03:40,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-11-26 12:03:40,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:40,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157922788] [2023-11-26 12:03:40,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:40,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139503411] [2023-11-26 12:03:40,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139503411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:40,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:40,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-26 12:03:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462046833] [2023-11-26 12:03:40,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:40,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 12:03:40,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:40,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 12:03:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:03:40,761 INFO L87 Difference]: Start difference. First operand 199 states and 269 transitions. Second operand has 19 states, 17 states have (on average 4.235294117647059) internal successors, (72), 19 states have internal predecessors, (72), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-26 12:03:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:42,070 INFO L93 Difference]: Finished difference Result 368 states and 492 transitions. [2023-11-26 12:03:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:03:42,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.235294117647059) internal successors, (72), 19 states have internal predecessors, (72), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 170 [2023-11-26 12:03:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:42,073 INFO L225 Difference]: With dead ends: 368 [2023-11-26 12:03:42,073 INFO L226 Difference]: Without dead ends: 200 [2023-11-26 12:03:42,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:03:42,075 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 12 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:42,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2165 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 12:03:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-26 12:03:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-11-26 12:03:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 123 states have internal predecessors, (148), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2023-11-26 12:03:42,090 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 170 [2023-11-26 12:03:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:42,091 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2023-11-26 12:03:42,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.235294117647059) internal successors, (72), 19 states have internal predecessors, (72), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-26 12:03:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2023-11-26 12:03:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-26 12:03:42,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:42,094 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:42,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:42,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 12:03:42,303 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:42,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash 866923593, now seen corresponding path program 5 times [2023-11-26 12:03:42,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:42,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888862833] [2023-11-26 12:03:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:42,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:42,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:42,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317661171] [2023-11-26 12:03:42,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:03:42,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:42,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:42,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:03:43,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-26 12:03:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:43,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 12:03:43,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 181 proven. 15 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-11-26 12:03:43,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-11-26 12:03:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888862833] [2023-11-26 12:03:44,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317661171] [2023-11-26 12:03:44,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317661171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:44,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:44,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-26 12:03:44,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389189336] [2023-11-26 12:03:44,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:44,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 12:03:44,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:44,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 12:03:44,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-26 12:03:44,378 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 21 states have internal predecessors, (85), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-26 12:03:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:46,476 INFO L93 Difference]: Finished difference Result 370 states and 494 transitions. [2023-11-26 12:03:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:03:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 21 states have internal predecessors, (85), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 172 [2023-11-26 12:03:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:46,479 INFO L225 Difference]: With dead ends: 370 [2023-11-26 12:03:46,479 INFO L226 Difference]: Without dead ends: 201 [2023-11-26 12:03:46,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:03:46,481 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 11 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:46,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2887 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 12:03:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-26 12:03:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-11-26 12:03:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 122 states have (on average 1.221311475409836) internal successors, (149), 124 states have internal predecessors, (149), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 271 transitions. [2023-11-26 12:03:46,496 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 271 transitions. Word has length 172 [2023-11-26 12:03:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:46,496 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 271 transitions. [2023-11-26 12:03:46,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 21 states have internal predecessors, (85), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-26 12:03:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 271 transitions. [2023-11-26 12:03:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-26 12:03:46,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:46,500 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:46,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:46,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 12:03:46,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:46,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:46,710 INFO L85 PathProgramCache]: Analyzing trace with hash 130108225, now seen corresponding path program 6 times [2023-11-26 12:03:46,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:46,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646042095] [2023-11-26 12:03:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:46,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:46,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819893926] [2023-11-26 12:03:46,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 12:03:46,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:46,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:46,826 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:46,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:03:52,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-26 12:03:52,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:52,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 12:03:52,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 64 proven. 21 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2023-11-26 12:03:52,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-11-26 12:03:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646042095] [2023-11-26 12:03:53,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819893926] [2023-11-26 12:03:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819893926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:53,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:53,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-26 12:03:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853746760] [2023-11-26 12:03:53,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:53,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 12:03:53,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 12:03:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:03:53,148 INFO L87 Difference]: Start difference. First operand 201 states and 271 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-26 12:03:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:55,122 INFO L93 Difference]: Finished difference Result 372 states and 496 transitions. [2023-11-26 12:03:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:03:55,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 174 [2023-11-26 12:03:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:55,126 INFO L225 Difference]: With dead ends: 372 [2023-11-26 12:03:55,126 INFO L226 Difference]: Without dead ends: 202 [2023-11-26 12:03:55,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 12:03:55,128 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 24 mSDsluCounter, 2401 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:55,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2645 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-26 12:03:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-26 12:03:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-11-26 12:03:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 123 states have (on average 1.2195121951219512) internal successors, (150), 125 states have internal predecessors, (150), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:03:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 272 transitions. [2023-11-26 12:03:55,143 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 272 transitions. Word has length 174 [2023-11-26 12:03:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:55,143 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 272 transitions. [2023-11-26 12:03:55,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-26 12:03:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 272 transitions. [2023-11-26 12:03:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-26 12:03:55,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:55,147 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:55,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:55,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:55,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:55,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1983330377, now seen corresponding path program 7 times [2023-11-26 12:03:55,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:55,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771615245] [2023-11-26 12:03:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:55,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:55,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:55,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019487937] [2023-11-26 12:03:55,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 12:03:55,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:55,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:55,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:55,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:03:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:57,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-26 12:03:57,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 209 proven. 28 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-11-26 12:03:57,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2023-11-26 12:03:58,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771615245] [2023-11-26 12:03:58,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019487937] [2023-11-26 12:03:58,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019487937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:58,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:58,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-26 12:03:58,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258681259] [2023-11-26 12:03:58,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:58,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 12:03:58,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:58,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 12:03:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:03:58,645 INFO L87 Difference]: Start difference. First operand 202 states and 272 transitions. Second operand has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-26 12:04:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:01,606 INFO L93 Difference]: Finished difference Result 374 states and 498 transitions. [2023-11-26 12:04:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 12:04:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 176 [2023-11-26 12:04:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:01,610 INFO L225 Difference]: With dead ends: 374 [2023-11-26 12:04:01,610 INFO L226 Difference]: Without dead ends: 203 [2023-11-26 12:04:01,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-11-26 12:04:01,613 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 15 mSDsluCounter, 3363 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3607 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:01,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3607 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-26 12:04:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-26 12:04:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-11-26 12:04:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 124 states have (on average 1.217741935483871) internal successors, (151), 126 states have internal predecessors, (151), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-26 12:04:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 273 transitions. [2023-11-26 12:04:01,627 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 273 transitions. Word has length 176 [2023-11-26 12:04:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:01,628 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 273 transitions. [2023-11-26 12:04:01,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-26 12:04:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 273 transitions. [2023-11-26 12:04:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-26 12:04:01,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:01,631 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:01,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:04:01,850 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:01,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:01,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1022480705, now seen corresponding path program 8 times [2023-11-26 12:04:01,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:01,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86155048] [2023-11-26 12:04:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:01,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:04:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499690063] [2023-11-26 12:04:01,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:04:01,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:01,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:01,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:01,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60aa909f-4c3a-4dce-ad3d-c830a443d363/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process