./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.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_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/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_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/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_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/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 7d8c1ced61af2c61b36782af6d28a32546abe33f0c852d8f862ae04f74aae5e5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:49:42,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:49:42,606 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-26 11:49:42,616 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:49:42,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:49:42,665 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:49:42,666 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:49:42,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:49:42,668 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:49:42,675 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:49:42,676 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:49:42,677 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:49:42,678 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:49:42,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:49:42,681 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:49:42,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:49:42,682 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:49:42,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:49:42,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:49:42,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:49:42,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:49:42,685 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:49:42,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:49:42,686 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:49:42,687 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:49:42,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:49:42,688 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:49:42,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:49:42,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:42,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:49:42,692 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:49:42,692 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:49:42,692 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:49:42,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:49:42,693 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:49:42,693 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:49:42,694 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:49:42,694 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:49:42,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:49:42,694 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_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d8c1ced61af2c61b36782af6d28a32546abe33f0c852d8f862ae04f74aae5e5 [2023-11-26 11:49:43,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:49:43,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:49:43,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:49:43,115 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:49:43,116 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:49:43,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i [2023-11-26 11:49:46,622 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:49:47,311 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:49:47,312 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i [2023-11-26 11:49:47,372 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/data/c26abb9b6/c66d8a07a4e4480e8c148c259e7de786/FLAG112ea0bbc [2023-11-26 11:49:47,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/data/c26abb9b6/c66d8a07a4e4480e8c148c259e7de786 [2023-11-26 11:49:47,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:49:47,396 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:49:47,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:47,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:49:47,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:49:47,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:47" (1/1) ... [2023-11-26 11:49:47,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3a1a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:47, skipping insertion in model container [2023-11-26 11:49:47,409 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:47" (1/1) ... [2023-11-26 11:49:47,593 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:49:48,037 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_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i[4491,4504] [2023-11-26 11:49:48,048 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_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i[4551,4564] [2023-11-26 11:49:49,352 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,353 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,354 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,355 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,358 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,381 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,382 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,384 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,384 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:49,806 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 11:49:49,808 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 11:49:49,809 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 11:49:49,810 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 11:49:49,813 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 11:49:49,814 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 11:49:49,814 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 11:49:49,815 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 11:49:49,816 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 11:49:49,817 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 11:49:50,265 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,266 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:50,416 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:49:50,434 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_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i[4491,4504] [2023-11-26 11:49:50,435 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_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_harness.i[4551,4564] [2023-11-26 11:49:50,483 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,483 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,484 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,485 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,486 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,495 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,495 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,497 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,498 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,576 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 11:49:50,577 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 11:49:50,578 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 11:49:50,579 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 11:49:50,581 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 11:49:50,582 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 11:49:50,582 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 11:49:50,583 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 11:49:50,584 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 11:49:50,585 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 11:49:50,783 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8051] [2023-11-26 11:49:50,785 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,785 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:49:50,802 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8537-8548] [2023-11-26 11:49:50,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:51,260 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,260 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,260 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,261 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,261 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,261 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,262 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,262 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,263 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,263 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,263 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,264 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,264 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,264 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,265 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,266 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,266 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,266 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:49:51,277 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:49:51,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51 WrapperNode [2023-11-26 11:49:51,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:51,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:51,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:49:51,281 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:49:51,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,584 INFO L138 Inliner]: procedures = 689, calls = 2499, calls flagged for inlining = 54, calls inlined = 5, statements flattened = 777 [2023-11-26 11:49:51,585 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:51,586 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:49:51,586 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:49:51,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:49:51,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,612 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,728 INFO L175 MemorySlicer]: Split 518 memory accesses to 6 slices as follows [2, 256, 236, 5, 16, 3]. 49 percent of accesses are in the largest equivalence class. The 502 initializations are split as follows [2, 256, 236, 5, 0, 3]. The 4 writes are split as follows [0, 0, 0, 0, 4, 0]. [2023-11-26 11:49:51,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,773 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,787 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,818 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:49:51,820 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:49:51,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:49:51,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:49:51,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (1/1) ... [2023-11-26 11:49:51,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:51,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:51,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:49:51,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:49:51,932 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-26 11:49:51,934 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-26 11:49:51,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:49:51,935 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-26 11:49:51,935 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-26 11:49:51,935 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-26 11:49:51,936 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-26 11:49:51,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:49:51,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:49:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:49:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:49:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:49:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:49:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-26 11:49:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-26 11:49:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 11:49:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 11:49:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:49:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:49:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:49:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:49:51,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:49:51,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 11:49:51,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-26 11:49:51,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-26 11:49:51,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:49:51,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:49:51,942 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-26 11:49:51,943 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-26 11:49:51,943 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-26 11:49:51,943 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-26 11:49:51,943 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:49:51,943 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:49:51,944 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2023-11-26 11:49:51,944 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2023-11-26 11:49:51,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:49:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:49:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:49:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:49:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 11:49:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-26 11:49:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-26 11:49:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:49:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:49:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 11:49:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-26 11:49:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-26 11:49:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-26 11:49:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-26 11:49:51,949 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-26 11:49:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:49:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:49:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:49:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:49:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:49:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:49:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:49:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:49:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:49:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:49:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:49:51,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:49:52,397 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:49:52,400 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:49:54,238 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:49:54,440 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:49:54,440 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 11:49:54,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:54 BoogieIcfgContainer [2023-11-26 11:49:54,441 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:49:54,445 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:49:54,445 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:49:54,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:49:54,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:49:47" (1/3) ... [2023-11-26 11:49:54,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65138d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:54, skipping insertion in model container [2023-11-26 11:49:54,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:51" (2/3) ... [2023-11-26 11:49:54,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65138d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:54, skipping insertion in model container [2023-11-26 11:49:54,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:54" (3/3) ... [2023-11-26 11:49:54,458 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_init_harness.i [2023-11-26 11:49:54,482 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:49:54,483 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:49:54,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:49:54,572 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;@24a707db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:49:54,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:49:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 55 states have internal predecessors, (70), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-26 11:49:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:49:54,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:54,601 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:49:54,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:54,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash -836795630, now seen corresponding path program 1 times [2023-11-26 11:49:54,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:54,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615280680] [2023-11-26 11:49:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:55,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:49:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:55,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:49:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:55,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:49:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:55,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:49:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:49:55,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615280680] [2023-11-26 11:49:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615280680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:55,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:55,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:55,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805580268] [2023-11-26 11:49:55,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:55,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:49:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:49:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:49:55,602 INFO L87 Difference]: Start difference. First operand has 86 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 55 states have internal predecessors, (70), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:49:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:55,753 INFO L93 Difference]: Finished difference Result 168 states and 227 transitions. [2023-11-26 11:49:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:49:55,756 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-26 11:49:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:55,767 INFO L225 Difference]: With dead ends: 168 [2023-11-26 11:49:55,767 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 11:49:55,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 11:49:55,775 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:55,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 11:49:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-26 11:49:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.25) internal successors, (65), 53 states have internal predecessors, (65), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-26 11:49:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2023-11-26 11:49:55,834 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 28 [2023-11-26 11:49:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:55,835 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2023-11-26 11:49:55,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:49:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2023-11-26 11:49:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:49:55,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:55,839 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:49:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:49:55,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:55,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1435162158, now seen corresponding path program 1 times [2023-11-26 11:49:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:55,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042450875] [2023-11-26 11:49:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:55,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:49:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:56,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:49:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:49:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:49:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:49:56,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:56,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042450875] [2023-11-26 11:49:56,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042450875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:56,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:56,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:56,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283574859] [2023-11-26 11:49:56,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:56,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:56,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:56,431 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:49:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:56,696 INFO L93 Difference]: Finished difference Result 127 states and 165 transitions. [2023-11-26 11:49:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:56,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-26 11:49:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:56,702 INFO L225 Difference]: With dead ends: 127 [2023-11-26 11:49:56,704 INFO L226 Difference]: Without dead ends: 91 [2023-11-26 11:49:56,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:56,709 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 5 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:56,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 269 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:49:56,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-26 11:49:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2023-11-26 11:49:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 56 states have internal predecessors, (68), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-26 11:49:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2023-11-26 11:49:56,728 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 28 [2023-11-26 11:49:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:56,728 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2023-11-26 11:49:56,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:49:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2023-11-26 11:49:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:49:56,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:56,731 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:49:56,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:49:56,731 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:56,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash -734097580, now seen corresponding path program 1 times [2023-11-26 11:49:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:56,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498965315] [2023-11-26 11:49:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:57,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:49:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:57,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:49:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:57,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:49:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:57,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:49:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:49:57,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498965315] [2023-11-26 11:49:57,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498965315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:57,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:57,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:49:57,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367111404] [2023-11-26 11:49:57,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:57,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:49:57,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:49:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:49:57,667 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:49:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:57,977 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2023-11-26 11:49:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:49:57,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-26 11:49:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:57,986 INFO L225 Difference]: With dead ends: 122 [2023-11-26 11:49:57,986 INFO L226 Difference]: Without dead ends: 86 [2023-11-26 11:49:57,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:49:57,991 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 38 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:57,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 310 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:49:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-26 11:49:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-26 11:49:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-26 11:49:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2023-11-26 11:49:58,015 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 28 [2023-11-26 11:49:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:58,016 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2023-11-26 11:49:58,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:49:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2023-11-26 11:49:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:49:58,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:58,020 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:49:58,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:49:58,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:58,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 139977351, now seen corresponding path program 1 times [2023-11-26 11:49:58,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:58,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314221009] [2023-11-26 11:49:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:58,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:58,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:49:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:58,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:49:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:49:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:58,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:49:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:49:58,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:58,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314221009] [2023-11-26 11:49:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314221009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:58,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641838091] [2023-11-26 11:49:58,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:58,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:58,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:58,562 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:49:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:58,817 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2023-11-26 11:49:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:58,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-11-26 11:49:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:58,823 INFO L225 Difference]: With dead ends: 130 [2023-11-26 11:49:58,823 INFO L226 Difference]: Without dead ends: 96 [2023-11-26 11:49:58,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:58,826 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 29 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:58,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 264 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:49:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-26 11:49:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2023-11-26 11:49:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 58 states have internal predecessors, (69), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-26 11:49:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-11-26 11:49:58,859 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 34 [2023-11-26 11:49:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:58,860 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-11-26 11:49:58,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:49:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-11-26 11:49:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:49:58,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:58,866 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:49:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:49:58,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:58,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash 533004361, now seen corresponding path program 1 times [2023-11-26 11:49:58,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:58,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429173078] [2023-11-26 11:49:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:58,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:59,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:49:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:59,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:49:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:59,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:49:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:59,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:49:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:00,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:00,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429173078] [2023-11-26 11:50:00,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429173078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:00,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:00,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:50:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759118944] [2023-11-26 11:50:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:00,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:50:00,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:50:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:00,014 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:50:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:00,472 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2023-11-26 11:50:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:00,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-11-26 11:50:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:00,476 INFO L225 Difference]: With dead ends: 99 [2023-11-26 11:50:00,476 INFO L226 Difference]: Without dead ends: 97 [2023-11-26 11:50:00,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:50:00,477 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 23 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:00,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 600 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:50:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-26 11:50:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-11-26 11:50:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-11-26 11:50:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2023-11-26 11:50:00,505 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 34 [2023-11-26 11:50:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:00,507 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2023-11-26 11:50:00,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:50:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2023-11-26 11:50:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:50:00,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:00,511 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:50:00,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:50:00,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:00,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1503721089, now seen corresponding path program 1 times [2023-11-26 11:50:00,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:00,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146803736] [2023-11-26 11:50:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:00,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:01,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:01,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:01,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:01,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:02,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:02,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146803736] [2023-11-26 11:50:02,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146803736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:02,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:02,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:50:02,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809735386] [2023-11-26 11:50:02,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:02,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:50:02,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:50:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:02,062 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:50:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:03,012 INFO L93 Difference]: Finished difference Result 161 states and 200 transitions. [2023-11-26 11:50:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:50:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-26 11:50:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:03,014 INFO L225 Difference]: With dead ends: 161 [2023-11-26 11:50:03,014 INFO L226 Difference]: Without dead ends: 122 [2023-11-26 11:50:03,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:50:03,018 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 97 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:03,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 449 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:50:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-26 11:50:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2023-11-26 11:50:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 77 states have internal predecessors, (90), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (23), 20 states have call predecessors, (23), 20 states have call successors, (23) [2023-11-26 11:50:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2023-11-26 11:50:03,037 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 38 [2023-11-26 11:50:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:03,038 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2023-11-26 11:50:03,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:50:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2023-11-26 11:50:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:50:03,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:03,043 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:50:03,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:50:03,047 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:03,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash -492603839, now seen corresponding path program 1 times [2023-11-26 11:50:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:03,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880163277] [2023-11-26 11:50:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:04,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:04,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:04,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:04,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:04,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880163277] [2023-11-26 11:50:04,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880163277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:04,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:04,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:50:04,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937218444] [2023-11-26 11:50:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:04,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:50:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:50:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:04,606 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:50:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:05,353 INFO L93 Difference]: Finished difference Result 184 states and 227 transitions. [2023-11-26 11:50:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-26 11:50:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:05,355 INFO L225 Difference]: With dead ends: 184 [2023-11-26 11:50:05,356 INFO L226 Difference]: Without dead ends: 132 [2023-11-26 11:50:05,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:05,357 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 60 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:05,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 444 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:50:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-26 11:50:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2023-11-26 11:50:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 79 states have internal predecessors, (93), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (23), 20 states have call predecessors, (23), 20 states have call successors, (23) [2023-11-26 11:50:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2023-11-26 11:50:05,373 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 38 [2023-11-26 11:50:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:05,374 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2023-11-26 11:50:05,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:50:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2023-11-26 11:50:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:50:05,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:05,376 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:50:05,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:50:05,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:05,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 208460739, now seen corresponding path program 1 times [2023-11-26 11:50:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:05,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062167607] [2023-11-26 11:50:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:05,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:08,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:08,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:08,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:08,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:08,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062167607] [2023-11-26 11:50:08,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062167607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:08,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:08,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:50:08,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20855651] [2023-11-26 11:50:08,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:08,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:50:08,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:08,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:50:08,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:50:08,485 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:50:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:10,117 INFO L93 Difference]: Finished difference Result 186 states and 236 transitions. [2023-11-26 11:50:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:50:10,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2023-11-26 11:50:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:10,119 INFO L225 Difference]: With dead ends: 186 [2023-11-26 11:50:10,119 INFO L226 Difference]: Without dead ends: 132 [2023-11-26 11:50:10,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:50:10,121 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 78 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:10,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 646 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:50:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-26 11:50:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2023-11-26 11:50:10,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 92 states have internal predecessors, (108), 22 states have call successors, (22), 11 states have call predecessors, (22), 14 states have return successors, (27), 20 states have call predecessors, (27), 21 states have call successors, (27) [2023-11-26 11:50:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2023-11-26 11:50:10,142 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 38 [2023-11-26 11:50:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:10,143 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2023-11-26 11:50:10,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:50:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2023-11-26 11:50:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:50:10,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:10,144 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:50:10,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:50:10,145 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:10,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1823724865, now seen corresponding path program 1 times [2023-11-26 11:50:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:10,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265702087] [2023-11-26 11:50:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:10,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:10,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:10,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:10,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:11,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:11,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265702087] [2023-11-26 11:50:11,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265702087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:11,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:11,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:50:11,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727689335] [2023-11-26 11:50:11,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:11,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:11,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:11,018 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:50:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:11,298 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2023-11-26 11:50:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:11,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2023-11-26 11:50:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:11,300 INFO L225 Difference]: With dead ends: 205 [2023-11-26 11:50:11,301 INFO L226 Difference]: Without dead ends: 140 [2023-11-26 11:50:11,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:11,302 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 13 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:11,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 364 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-26 11:50:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2023-11-26 11:50:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 93 states have internal predecessors, (108), 22 states have call successors, (22), 11 states have call predecessors, (22), 14 states have return successors, (27), 20 states have call predecessors, (27), 21 states have call successors, (27) [2023-11-26 11:50:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2023-11-26 11:50:11,314 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 38 [2023-11-26 11:50:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:11,315 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2023-11-26 11:50:11,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:50:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2023-11-26 11:50:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 11:50:11,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:11,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:11,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:50:11,317 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:11,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2090641480, now seen corresponding path program 1 times [2023-11-26 11:50:11,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:11,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145730822] [2023-11-26 11:50:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:11,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:12,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:12,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:12,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:12,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:12,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145730822] [2023-11-26 11:50:12,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145730822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:12,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:12,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:50:12,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665173591] [2023-11-26 11:50:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:12,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:50:12,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:50:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:50:12,355 INFO L87 Difference]: Start difference. First operand 125 states and 157 transitions. Second operand has 10 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:50:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:13,119 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2023-11-26 11:50:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:50:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-11-26 11:50:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:13,122 INFO L225 Difference]: With dead ends: 148 [2023-11-26 11:50:13,122 INFO L226 Difference]: Without dead ends: 146 [2023-11-26 11:50:13,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:50:13,123 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 31 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:13,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 763 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:50:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-26 11:50:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2023-11-26 11:50:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 100 states have internal predecessors, (114), 22 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (29), 20 states have call predecessors, (29), 21 states have call successors, (29) [2023-11-26 11:50:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2023-11-26 11:50:13,137 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 40 [2023-11-26 11:50:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:13,137 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2023-11-26 11:50:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:50:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2023-11-26 11:50:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 11:50:13,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:13,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:13,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:50:13,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:13,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1811298806, now seen corresponding path program 1 times [2023-11-26 11:50:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:13,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133894321] [2023-11-26 11:50:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:14,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133894321] [2023-11-26 11:50:14,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133894321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:14,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:14,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:50:14,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034671782] [2023-11-26 11:50:14,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:14,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:50:14,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:50:14,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:14,445 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:50:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:15,549 INFO L93 Difference]: Finished difference Result 220 states and 271 transitions. [2023-11-26 11:50:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:50:15,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-11-26 11:50:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:15,552 INFO L225 Difference]: With dead ends: 220 [2023-11-26 11:50:15,552 INFO L226 Difference]: Without dead ends: 147 [2023-11-26 11:50:15,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:50:15,553 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 20 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:15,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 449 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:50:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-26 11:50:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 126. [2023-11-26 11:50:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 94 states have internal predecessors, (109), 22 states have call successors, (22), 11 states have call predecessors, (22), 14 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) [2023-11-26 11:50:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2023-11-26 11:50:15,564 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 40 [2023-11-26 11:50:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:15,564 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2023-11-26 11:50:15,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:50:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2023-11-26 11:50:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-26 11:50:15,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:15,566 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:50:15,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:50:15,567 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:15,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2104477033, now seen corresponding path program 1 times [2023-11-26 11:50:15,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:15,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415555533] [2023-11-26 11:50:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:15,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 11:50:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 11:50:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 11:50:16,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:16,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415555533] [2023-11-26 11:50:16,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415555533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:16,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:16,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:50:16,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480883456] [2023-11-26 11:50:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:16,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:50:16,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:50:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:50:16,484 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 11:50:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:17,172 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2023-11-26 11:50:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:17,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 53 [2023-11-26 11:50:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:17,174 INFO L225 Difference]: With dead ends: 137 [2023-11-26 11:50:17,175 INFO L226 Difference]: Without dead ends: 135 [2023-11-26 11:50:17,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:50:17,176 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 23 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:17,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 617 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:50:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-26 11:50:17,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2023-11-26 11:50:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 100 states have internal predecessors, (114), 23 states have call successors, (23), 12 states have call predecessors, (23), 16 states have return successors, (30), 21 states have call predecessors, (30), 22 states have call successors, (30) [2023-11-26 11:50:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2023-11-26 11:50:17,189 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 53 [2023-11-26 11:50:17,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:17,191 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2023-11-26 11:50:17,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-26 11:50:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2023-11-26 11:50:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 11:50:17,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:17,194 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:50:17,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:50:17,195 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:17,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -252957491, now seen corresponding path program 1 times [2023-11-26 11:50:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:17,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180500560] [2023-11-26 11:50:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 11:50:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 11:50:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:50:18,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:18,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180500560] [2023-11-26 11:50:18,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180500560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:18,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:18,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:50:18,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287933080] [2023-11-26 11:50:18,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:18,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:50:18,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:18,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:50:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:50:18,621 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 11:50:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:19,768 INFO L93 Difference]: Finished difference Result 176 states and 223 transitions. [2023-11-26 11:50:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:50:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2023-11-26 11:50:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:19,772 INFO L225 Difference]: With dead ends: 176 [2023-11-26 11:50:19,772 INFO L226 Difference]: Without dead ends: 163 [2023-11-26 11:50:19,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:19,775 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 98 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:19,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 525 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:50:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-26 11:50:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 142. [2023-11-26 11:50:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 100 states have (on average 1.2) internal successors, (120), 108 states have internal predecessors, (120), 24 states have call successors, (24), 12 states have call predecessors, (24), 17 states have return successors, (36), 21 states have call predecessors, (36), 23 states have call successors, (36) [2023-11-26 11:50:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2023-11-26 11:50:19,797 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 57 [2023-11-26 11:50:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:19,797 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2023-11-26 11:50:19,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 11:50:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2023-11-26 11:50:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 11:50:19,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:19,799 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:50:19,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:50:19,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:19,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash 758159759, now seen corresponding path program 1 times [2023-11-26 11:50:19,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:19,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393721010] [2023-11-26 11:50:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 11:50:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 11:50:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:50:21,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:21,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393721010] [2023-11-26 11:50:21,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393721010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:21,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:21,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:50:21,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132820297] [2023-11-26 11:50:21,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:21,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:50:21,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:50:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:50:21,147 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 11:50:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:21,945 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2023-11-26 11:50:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:50:21,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2023-11-26 11:50:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:21,947 INFO L225 Difference]: With dead ends: 187 [2023-11-26 11:50:21,947 INFO L226 Difference]: Without dead ends: 174 [2023-11-26 11:50:21,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:50:21,948 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 68 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:21,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 395 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:50:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-26 11:50:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2023-11-26 11:50:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 100 states have (on average 1.2) internal successors, (120), 108 states have internal predecessors, (120), 24 states have call successors, (24), 12 states have call predecessors, (24), 17 states have return successors, (36), 21 states have call predecessors, (36), 23 states have call successors, (36) [2023-11-26 11:50:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2023-11-26 11:50:21,971 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 57 [2023-11-26 11:50:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:21,971 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2023-11-26 11:50:21,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 11:50:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2023-11-26 11:50:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-26 11:50:21,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:21,973 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 11:50:21,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:50:21,974 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:50:21,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1459224337, now seen corresponding path program 1 times [2023-11-26 11:50:21,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:21,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247919463] [2023-11-26 11:50:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:21,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:50:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 11:50:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:50:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 11:50:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 11:50:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:50:23,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:23,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247919463] [2023-11-26 11:50:23,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247919463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:23,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478755881] [2023-11-26 11:50:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:23,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:23,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:23,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:23,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39ed1b82-0ea1-4bfb-82b3-b5dda7918be5/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:24,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 2448 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 11:50:24,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:25,618 INFO L327 TraceCheckSpWp]: Computing backward predicates...