./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya --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 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:26:24,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:26:24,306 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-29 00:26:24,310 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:26:24,311 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:26:24,334 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:26:24,335 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:26:24,335 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:26:24,336 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:26:24,336 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:26:24,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:26:24,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:26:24,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:26:24,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:26:24,339 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:26:24,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:26:24,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:26:24,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:26:24,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:26:24,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:26:24,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:26:24,343 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:26:24,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:26:24,344 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:26:24,344 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:26:24,345 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:26:24,345 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:26:24,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:26:24,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:26:24,347 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:26:24,347 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:26:24,355 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:26:24,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:26:24,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:26:24,356 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:26:24,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:26:24,357 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:26:24,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:26:24,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:26:24,357 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_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc [2023-11-29 00:26:24,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:26:24,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:26:24,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:26:24,596 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:26:24,596 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:26:24,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2023-11-29 00:26:27,390 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:26:27,794 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:26:27,794 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2023-11-29 00:26:27,827 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/data/aa1662467/a643dd1c7a034b32a21f203359187b73/FLAG33bb7fad5 [2023-11-29 00:26:27,838 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/data/aa1662467/a643dd1c7a034b32a21f203359187b73 [2023-11-29 00:26:27,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:26:27,843 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:26:27,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:26:27,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:26:27,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:26:27,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:26:27" (1/1) ... [2023-11-29 00:26:27,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a76201c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:27, skipping insertion in model container [2023-11-29 00:26:27,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:26:27" (1/1) ... [2023-11-29 00:26:27,922 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:26:28,119 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_a7796e84-690a-4aef-8701-1db182e4de05/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4499,4512] [2023-11-29 00:26:28,126 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_a7796e84-690a-4aef-8701-1db182e4de05/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4559,4572] [2023-11-29 00:26:28,875 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:28,876 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:28,877 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:28,878 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:28,880 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:28,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:28,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:28,896 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:28,896 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,261 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 00:26:29,263 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 00:26:29,264 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 00:26:29,265 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 00:26:29,266 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 00:26:29,267 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 00:26:29,268 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 00:26:29,268 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 00:26:29,269 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 00:26:29,270 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 00:26:29,519 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,520 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:26:29,629 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:26:29,643 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_a7796e84-690a-4aef-8701-1db182e4de05/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4499,4512] [2023-11-29 00:26:29,643 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_a7796e84-690a-4aef-8701-1db182e4de05/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4559,4572] [2023-11-29 00:26:29,676 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,677 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,677 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,678 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,678 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,683 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,684 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,685 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,685 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,715 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-29 00:26:29,716 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-29 00:26:29,716 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-29 00:26:29,717 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-29 00:26:29,718 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-29 00:26:29,718 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-29 00:26:29,719 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-29 00:26:29,719 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-29 00:26:29,719 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-29 00:26:29,720 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-29 00:26:29,804 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8271] [2023-11-29 00:26:29,805 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,806 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-29 00:26:29,818 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8757-8768] [2023-11-29 00:26:29,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:26:30,092 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,092 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,092 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,092 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,092 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,092 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,093 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,093 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,093 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,093 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,093 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,093 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,093 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,093 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,094 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,094 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,094 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,094 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:26:30,102 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:26:30,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30 WrapperNode [2023-11-29 00:26:30,102 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:26:30,103 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:26:30,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:26:30,104 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:26:30,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,183 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,256 INFO L138 Inliner]: procedures = 689, calls = 2623, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 893 [2023-11-29 00:26:30,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:26:30,257 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:26:30,257 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:26:30,258 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:26:30,268 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,274 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,333 INFO L175 MemorySlicer]: Split 555 memory accesses to 7 slices as follows [2, 5, 256, 6, 43, 240, 3]. 46 percent of accesses are in the largest equivalence class. The 512 initializations are split as follows [2, 5, 256, 0, 10, 236, 3]. The 6 writes are split as follows [0, 0, 0, 2, 4, 0, 0]. [2023-11-29 00:26:30,334 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,366 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,370 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,402 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:26:30,403 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:26:30,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:26:30,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:26:30,404 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (1/1) ... [2023-11-29 00:26:30,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:26:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:30,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:26:30,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:26:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2023-11-29 00:26:30,477 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2023-11-29 00:26:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:26:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-29 00:26:30,477 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-29 00:26:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:26:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:26:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:26:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:26:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 00:26:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 00:26:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-29 00:26:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 00:26:30,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 00:26:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2023-11-29 00:26:30,478 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-29 00:26:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-29 00:26:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:26:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:26:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-29 00:26:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-29 00:26:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-29 00:26:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-29 00:26:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:26:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:26:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:26:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 00:26:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 00:26:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 00:26:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-29 00:26:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-29 00:26:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-29 00:26:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-29 00:26:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 00:26:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 00:26:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 00:26:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-29 00:26:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-29 00:26:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-29 00:26:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2023-11-29 00:26:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2023-11-29 00:26:30,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2023-11-29 00:26:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:26:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:26:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:26:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:26:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 00:26:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 00:26:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-29 00:26:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:26:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:26:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:26:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:26:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:26:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 00:26:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 00:26:30,748 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:26:30,751 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:26:31,828 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:26:32,077 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:26:32,077 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:26:32,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:26:32 BoogieIcfgContainer [2023-11-29 00:26:32,078 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:26:32,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:26:32,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:26:32,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:26:32,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:26:27" (1/3) ... [2023-11-29 00:26:32,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2e1b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:26:32, skipping insertion in model container [2023-11-29 00:26:32,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:26:30" (2/3) ... [2023-11-29 00:26:32,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2e1b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:26:32, skipping insertion in model container [2023-11-29 00:26:32,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:26:32" (3/3) ... [2023-11-29 00:26:32,087 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_trim_pred_harness.i [2023-11-29 00:26:32,105 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:26:32,105 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:26:32,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:26:32,162 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;@3dc1d108, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:26:32,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:26:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 63 states have internal predecessors, (80), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-29 00:26:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 00:26:32,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:32,179 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:32,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:32,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash 416696671, now seen corresponding path program 1 times [2023-11-29 00:26:32,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:32,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073736312] [2023-11-29 00:26:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:32,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 00:26:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 00:26:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:26:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:26:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-29 00:26:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 00:26:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 00:26:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 00:26:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-29 00:26:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073736312] [2023-11-29 00:26:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073736312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:32,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:26:32,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898531628] [2023-11-29 00:26:32,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:32,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:26:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:26:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:26:32,876 INFO L87 Difference]: Start difference. First operand has 109 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 63 states have internal predecessors, (80), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 00:26:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:33,254 INFO L93 Difference]: Finished difference Result 216 states and 327 transitions. [2023-11-29 00:26:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:26:33,256 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 71 [2023-11-29 00:26:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:33,265 INFO L225 Difference]: With dead ends: 216 [2023-11-29 00:26:33,265 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 00:26:33,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:26:33,273 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:33,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:26:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 00:26:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-29 00:26:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.206896551724138) internal successors, (70), 59 states have internal predecessors, (70), 37 states have call successors, (37), 8 states have call predecessors, (37), 7 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-29 00:26:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 142 transitions. [2023-11-29 00:26:33,323 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 142 transitions. Word has length 71 [2023-11-29 00:26:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:33,324 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 142 transitions. [2023-11-29 00:26:33,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 00:26:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 142 transitions. [2023-11-29 00:26:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 00:26:33,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:33,328 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:33,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:26:33,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:33,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1013468090, now seen corresponding path program 1 times [2023-11-29 00:26:33,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:33,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003354877] [2023-11-29 00:26:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 00:26:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 00:26:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:26:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:34,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:26:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:34,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-29 00:26:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:34,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 00:26:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:34,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 00:26:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:34,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-29 00:26:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 00:26:34,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:34,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003354877] [2023-11-29 00:26:34,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003354877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:34,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097867797] [2023-11-29 00:26:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:34,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:34,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:34,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:26:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:34,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 2525 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:26:34,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 00:26:34,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097867797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:34,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-29 00:26:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654112374] [2023-11-29 00:26:34,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:34,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:26:34,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:26:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:26:34,803 INFO L87 Difference]: Start difference. First operand 103 states and 142 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 00:26:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:35,365 INFO L93 Difference]: Finished difference Result 193 states and 278 transitions. [2023-11-29 00:26:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:26:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 73 [2023-11-29 00:26:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:35,369 INFO L225 Difference]: With dead ends: 193 [2023-11-29 00:26:35,369 INFO L226 Difference]: Without dead ends: 105 [2023-11-29 00:26:35,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:26:35,372 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 37 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:35,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 384 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:26:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-29 00:26:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-29 00:26:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 61 states have internal predecessors, (71), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (45), 35 states have call predecessors, (45), 35 states have call successors, (45) [2023-11-29 00:26:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 153 transitions. [2023-11-29 00:26:35,392 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 153 transitions. Word has length 73 [2023-11-29 00:26:35,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:35,393 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 153 transitions. [2023-11-29 00:26:35,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 00:26:35,393 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 153 transitions. [2023-11-29 00:26:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 00:26:35,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:35,395 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:35,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 00:26:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:35,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:35,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2104590783, now seen corresponding path program 1 times [2023-11-29 00:26:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:35,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292256896] [2023-11-29 00:26:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:35,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:26:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 00:26:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 00:26:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:26:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-29 00:26:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-29 00:26:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-29 00:26:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-29 00:26:36,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:36,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292256896] [2023-11-29 00:26:36,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292256896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:36,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710412524] [2023-11-29 00:26:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:36,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:36,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:36,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:26:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:37,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 2530 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:26:37,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 00:26:37,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:37,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710412524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:37,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:37,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-11-29 00:26:37,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343754882] [2023-11-29 00:26:37,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:37,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:26:37,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:37,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:26:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:26:37,287 INFO L87 Difference]: Start difference. First operand 105 states and 153 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-29 00:26:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:37,997 INFO L93 Difference]: Finished difference Result 188 states and 275 transitions. [2023-11-29 00:26:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:26:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 75 [2023-11-29 00:26:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:38,000 INFO L225 Difference]: With dead ends: 188 [2023-11-29 00:26:38,000 INFO L226 Difference]: Without dead ends: 105 [2023-11-29 00:26:38,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:26:38,003 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 49 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:38,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 482 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-29 00:26:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-29 00:26:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 61 states have internal predecessors, (71), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (43), 35 states have call predecessors, (43), 35 states have call successors, (43) [2023-11-29 00:26:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2023-11-29 00:26:38,019 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 75 [2023-11-29 00:26:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:38,019 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2023-11-29 00:26:38,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-29 00:26:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2023-11-29 00:26:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-29 00:26:38,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:38,022 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:38,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:26:38,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:38,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:38,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash -12124826, now seen corresponding path program 2 times [2023-11-29 00:26:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:38,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063945379] [2023-11-29 00:26:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:38,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:26:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:26:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:26:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 00:26:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-29 00:26:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-29 00:26:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-29 00:26:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-29 00:26:39,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:39,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063945379] [2023-11-29 00:26:39,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063945379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:39,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568651497] [2023-11-29 00:26:39,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:26:39,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:39,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:39,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:39,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:26:39,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:26:39,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:26:39,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:26:39,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-29 00:26:39,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:39,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568651497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:39,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:39,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 11 [2023-11-29 00:26:39,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284545683] [2023-11-29 00:26:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:39,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:26:39,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:39,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:26:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:26:39,942 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-29 00:26:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:41,017 INFO L93 Difference]: Finished difference Result 181 states and 261 transitions. [2023-11-29 00:26:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:26:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2023-11-29 00:26:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:41,020 INFO L225 Difference]: With dead ends: 181 [2023-11-29 00:26:41,020 INFO L226 Difference]: Without dead ends: 105 [2023-11-29 00:26:41,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:26:41,022 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 63 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:41,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 680 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:26:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-29 00:26:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-29 00:26:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 61 states have internal predecessors, (71), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-29 00:26:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 149 transitions. [2023-11-29 00:26:41,038 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 149 transitions. Word has length 77 [2023-11-29 00:26:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:41,039 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 149 transitions. [2023-11-29 00:26:41,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-29 00:26:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 149 transitions. [2023-11-29 00:26:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-29 00:26:41,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:41,041 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:41,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:26:41,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:41,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:41,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:41,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2027068828, now seen corresponding path program 1 times [2023-11-29 00:26:41,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:41,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333433015] [2023-11-29 00:26:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:41,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:26:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:26:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:26:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 00:26:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:42,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 00:26:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:42,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-29 00:26:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:42,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 00:26:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-29 00:26:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333433015] [2023-11-29 00:26:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333433015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:42,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:26:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888726816] [2023-11-29 00:26:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:26:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:26:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:26:42,105 INFO L87 Difference]: Start difference. First operand 105 states and 149 transitions. Second operand has 8 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-29 00:26:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:42,790 INFO L93 Difference]: Finished difference Result 116 states and 171 transitions. [2023-11-29 00:26:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:26:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 81 [2023-11-29 00:26:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:42,792 INFO L225 Difference]: With dead ends: 116 [2023-11-29 00:26:42,792 INFO L226 Difference]: Without dead ends: 114 [2023-11-29 00:26:42,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:26:42,794 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 17 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:42,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 911 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-29 00:26:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2023-11-29 00:26:42,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 38 states have call successors, (38), 9 states have call predecessors, (38), 10 states have return successors, (54), 36 states have call predecessors, (54), 36 states have call successors, (54) [2023-11-29 00:26:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 168 transitions. [2023-11-29 00:26:42,812 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 168 transitions. Word has length 81 [2023-11-29 00:26:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:42,813 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 168 transitions. [2023-11-29 00:26:42,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-29 00:26:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 168 transitions. [2023-11-29 00:26:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 00:26:42,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:42,814 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:42,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:26:42,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:42,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash -777195180, now seen corresponding path program 1 times [2023-11-29 00:26:42,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:42,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061290262] [2023-11-29 00:26:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:26:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:26:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:26:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 00:26:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 00:26:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-29 00:26:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 00:26:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 00:26:43,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:43,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061290262] [2023-11-29 00:26:43,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061290262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:43,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:43,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:26:43,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169969831] [2023-11-29 00:26:43,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:43,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:26:43,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:43,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:26:43,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:26:43,874 INFO L87 Difference]: Start difference. First operand 113 states and 168 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 00:26:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:45,119 INFO L93 Difference]: Finished difference Result 202 states and 310 transitions. [2023-11-29 00:26:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:26:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 85 [2023-11-29 00:26:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:45,122 INFO L225 Difference]: With dead ends: 202 [2023-11-29 00:26:45,123 INFO L226 Difference]: Without dead ends: 133 [2023-11-29 00:26:45,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:26:45,124 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 30 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:45,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 636 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:26:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-29 00:26:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 120. [2023-11-29 00:26:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 72 states have internal predecessors, (82), 41 states have call successors, (41), 9 states have call predecessors, (41), 10 states have return successors, (58), 38 states have call predecessors, (58), 39 states have call successors, (58) [2023-11-29 00:26:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 181 transitions. [2023-11-29 00:26:45,146 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 181 transitions. Word has length 85 [2023-11-29 00:26:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:45,147 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 181 transitions. [2023-11-29 00:26:45,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 00:26:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 181 transitions. [2023-11-29 00:26:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 00:26:45,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:45,149 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:26:45,149 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:45,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1180126405, now seen corresponding path program 1 times [2023-11-29 00:26:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626364274] [2023-11-29 00:26:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:26:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:26:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:26:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 00:26:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 00:26:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-29 00:26:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-29 00:26:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-29 00:26:45,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:45,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626364274] [2023-11-29 00:26:45,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626364274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:45,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:45,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:26:45,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449782839] [2023-11-29 00:26:45,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:45,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:26:45,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:26:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:45,351 INFO L87 Difference]: Start difference. First operand 120 states and 181 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 00:26:45,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:45,914 INFO L93 Difference]: Finished difference Result 201 states and 302 transitions. [2023-11-29 00:26:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:26:45,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 88 [2023-11-29 00:26:45,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:45,916 INFO L225 Difference]: With dead ends: 201 [2023-11-29 00:26:45,916 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 00:26:45,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:26:45,918 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:45,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 257 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:26:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 00:26:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-29 00:26:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 73 states have internal predecessors, (82), 41 states have call successors, (41), 9 states have call predecessors, (41), 10 states have return successors, (58), 38 states have call predecessors, (58), 39 states have call successors, (58) [2023-11-29 00:26:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 181 transitions. [2023-11-29 00:26:45,936 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 181 transitions. Word has length 88 [2023-11-29 00:26:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:45,937 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 181 transitions. [2023-11-29 00:26:45,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-29 00:26:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 181 transitions. [2023-11-29 00:26:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 00:26:45,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:45,939 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:45,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:26:45,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:45,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:45,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1593180197, now seen corresponding path program 1 times [2023-11-29 00:26:45,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:45,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982131744] [2023-11-29 00:26:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:26:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:26:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:26:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:46,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 00:26:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:47,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 00:26:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:47,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-29 00:26:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:47,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-29 00:26:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:47,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-29 00:26:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 00:26:47,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982131744] [2023-11-29 00:26:47,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982131744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:47,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857009638] [2023-11-29 00:26:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:47,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:47,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:47,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:47,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:26:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:47,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 00:26:47,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 13 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 00:26:48,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:49,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-29 00:26:49,189 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 00:26:49,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2023-11-29 00:26:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-29 00:26:49,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857009638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:49,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:26:49,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 12] total 24 [2023-11-29 00:26:49,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048676834] [2023-11-29 00:26:49,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:49,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:26:49,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:49,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:26:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:26:49,204 INFO L87 Difference]: Start difference. First operand 121 states and 181 transitions. Second operand has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-11-29 00:26:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:55,015 INFO L93 Difference]: Finished difference Result 427 states and 669 transitions. [2023-11-29 00:26:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 00:26:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 89 [2023-11-29 00:26:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:55,020 INFO L225 Difference]: With dead ends: 427 [2023-11-29 00:26:55,020 INFO L226 Difference]: Without dead ends: 326 [2023-11-29 00:26:55,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 174 SyntacticMatches, 19 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=322, Invalid=2228, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:26:55,023 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 290 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:55,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1125 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 2148 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-29 00:26:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-29 00:26:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 275. [2023-11-29 00:26:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 156 states have (on average 1.1602564102564104) internal successors, (181), 161 states have internal predecessors, (181), 97 states have call successors, (97), 19 states have call predecessors, (97), 21 states have return successors, (134), 94 states have call predecessors, (134), 93 states have call successors, (134) [2023-11-29 00:26:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 412 transitions. [2023-11-29 00:26:55,083 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 412 transitions. Word has length 89 [2023-11-29 00:26:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:55,083 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 412 transitions. [2023-11-29 00:26:55,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-11-29 00:26:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 412 transitions. [2023-11-29 00:26:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 00:26:55,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:55,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:55,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:26:55,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:26:55,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:55,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash 481923228, now seen corresponding path program 1 times [2023-11-29 00:26:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:55,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954491553] [2023-11-29 00:26:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:55,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:26:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:26:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:26:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 00:26:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 00:26:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-29 00:26:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 00:26:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 00:26:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-29 00:26:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-29 00:26:55,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:55,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954491553] [2023-11-29 00:26:55,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954491553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:55,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:55,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:26:55,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156357778] [2023-11-29 00:26:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:55,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:26:55,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:26:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:55,732 INFO L87 Difference]: Start difference. First operand 275 states and 412 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 00:26:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:56,483 INFO L93 Difference]: Finished difference Result 434 states and 651 transitions. [2023-11-29 00:26:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:26:56,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2023-11-29 00:26:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:56,486 INFO L225 Difference]: With dead ends: 434 [2023-11-29 00:26:56,486 INFO L226 Difference]: Without dead ends: 273 [2023-11-29 00:26:56,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:56,488 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 15 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:56,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 342 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-29 00:26:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2023-11-29 00:26:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 159 states have internal predecessors, (179), 97 states have call successors, (97), 19 states have call predecessors, (97), 20 states have return successors, (129), 94 states have call predecessors, (129), 93 states have call successors, (129) [2023-11-29 00:26:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 405 transitions. [2023-11-29 00:26:56,529 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 405 transitions. Word has length 92 [2023-11-29 00:26:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:56,530 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 405 transitions. [2023-11-29 00:26:56,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-29 00:26:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 405 transitions. [2023-11-29 00:26:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 00:26:56,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:56,532 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:56,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:26:56,533 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:56,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:56,533 INFO L85 PathProgramCache]: Analyzing trace with hash 345939095, now seen corresponding path program 1 times [2023-11-29 00:26:56,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:56,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068735249] [2023-11-29 00:26:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:56,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:56,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:56,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:56,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:56,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:26:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:56,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:26:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:57,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:26:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:57,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 00:26:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:57,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-29 00:26:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:57,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-29 00:26:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:57,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-29 00:26:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:57,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 00:26:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:57,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-29 00:26:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-29 00:26:57,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:57,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068735249] [2023-11-29 00:26:57,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068735249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:57,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:57,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:26:57,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449821104] [2023-11-29 00:26:57,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:57,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:26:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:26:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:26:57,079 INFO L87 Difference]: Start difference. First operand 273 states and 405 transitions. Second operand has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 00:26:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:57,841 INFO L93 Difference]: Finished difference Result 285 states and 417 transitions. [2023-11-29 00:26:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:26:57,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 94 [2023-11-29 00:26:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:57,845 INFO L225 Difference]: With dead ends: 285 [2023-11-29 00:26:57,845 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 00:26:57,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:26:57,846 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 17 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:57,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 920 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:26:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 00:26:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2023-11-29 00:26:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 161 states have (on average 1.1490683229813665) internal successors, (185), 165 states have internal predecessors, (185), 98 states have call successors, (98), 21 states have call predecessors, (98), 22 states have return successors, (130), 95 states have call predecessors, (130), 94 states have call successors, (130) [2023-11-29 00:26:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 413 transitions. [2023-11-29 00:26:57,892 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 413 transitions. Word has length 94 [2023-11-29 00:26:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:57,892 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 413 transitions. [2023-11-29 00:26:57,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-29 00:26:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 413 transitions. [2023-11-29 00:26:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 00:26:57,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:57,894 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:57,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:26:57,895 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:57,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1142181027, now seen corresponding path program 1 times [2023-11-29 00:26:57,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:57,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214768225] [2023-11-29 00:26:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:26:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:26:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:26:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-29 00:26:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 00:26:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 00:26:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 00:26:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-29 00:26:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-29 00:26:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 00:26:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-11-29 00:26:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-29 00:26:58,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214768225] [2023-11-29 00:26:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214768225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351535356] [2023-11-29 00:26:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:58,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:58,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:58,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:26:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:59,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 2616 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:26:59,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 00:26:59,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351535356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:59,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:26:59,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2023-11-29 00:26:59,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810707313] [2023-11-29 00:26:59,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:59,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:26:59,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:26:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:26:59,103 INFO L87 Difference]: Start difference. First operand 282 states and 413 transitions. Second operand has 9 states, 7 states have (on average 6.857142857142857) internal successors, (48), 8 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-29 00:27:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:00,409 INFO L93 Difference]: Finished difference Result 529 states and 793 transitions. [2023-11-29 00:27:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:27:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.857142857142857) internal successors, (48), 8 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 101 [2023-11-29 00:27:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:00,413 INFO L225 Difference]: With dead ends: 529 [2023-11-29 00:27:00,413 INFO L226 Difference]: Without dead ends: 290 [2023-11-29 00:27:00,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:27:00,415 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 13 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:00,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 976 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:27:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-29 00:27:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 286. [2023-11-29 00:27:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 164 states have (on average 1.146341463414634) internal successors, (188), 169 states have internal predecessors, (188), 98 states have call successors, (98), 21 states have call predecessors, (98), 23 states have return successors, (141), 95 states have call predecessors, (141), 94 states have call successors, (141) [2023-11-29 00:27:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 427 transitions. [2023-11-29 00:27:00,465 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 427 transitions. Word has length 101 [2023-11-29 00:27:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:00,465 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 427 transitions. [2023-11-29 00:27:00,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.857142857142857) internal successors, (48), 8 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-29 00:27:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 427 transitions. [2023-11-29 00:27:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 00:27:00,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:00,468 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:00,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 00:27:00,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:27:00,669 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:27:00,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1065349494, now seen corresponding path program 1 times [2023-11-29 00:27:00,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:00,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339991708] [2023-11-29 00:27:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:00,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:27:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:27:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:27:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 00:27:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 00:27:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-29 00:27:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-29 00:27:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-29 00:27:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-29 00:27:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 00:27:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-29 00:27:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-29 00:27:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-29 00:27:01,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:01,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339991708] [2023-11-29 00:27:01,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339991708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:01,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364176096] [2023-11-29 00:27:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:01,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:01,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:01,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:27:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:01,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 2626 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:27:01,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 00:27:01,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:27:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364176096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:27:01,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:27:01,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 12 [2023-11-29 00:27:01,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107002672] [2023-11-29 00:27:01,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:01,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:27:01,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:27:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:27:01,986 INFO L87 Difference]: Start difference. First operand 286 states and 427 transitions. Second operand has 10 states, 7 states have (on average 7.714285714285714) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 00:27:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:03,063 INFO L93 Difference]: Finished difference Result 488 states and 729 transitions. [2023-11-29 00:27:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:27:03,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 7.714285714285714) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2023-11-29 00:27:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:03,066 INFO L225 Difference]: With dead ends: 488 [2023-11-29 00:27:03,066 INFO L226 Difference]: Without dead ends: 294 [2023-11-29 00:27:03,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:27:03,068 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 28 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:03,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 929 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:27:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-29 00:27:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2023-11-29 00:27:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 164 states have (on average 1.146341463414634) internal successors, (188), 169 states have internal predecessors, (188), 98 states have call successors, (98), 21 states have call predecessors, (98), 23 states have return successors, (140), 95 states have call predecessors, (140), 94 states have call successors, (140) [2023-11-29 00:27:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 426 transitions. [2023-11-29 00:27:03,101 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 426 transitions. Word has length 103 [2023-11-29 00:27:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:03,102 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 426 transitions. [2023-11-29 00:27:03,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 7.714285714285714) internal successors, (54), 9 states have internal predecessors, (54), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 00:27:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 426 transitions. [2023-11-29 00:27:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 00:27:03,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:03,103 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:03,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:27:03,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:27:03,304 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:27:03,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2090800317, now seen corresponding path program 2 times [2023-11-29 00:27:03,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:03,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253821489] [2023-11-29 00:27:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:27:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:27:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:27:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 00:27:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 00:27:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:27:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-29 00:27:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-29 00:27:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-29 00:27:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:03,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-29 00:27:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:04,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 00:27:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:04,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-11-29 00:27:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-29 00:27:04,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253821489] [2023-11-29 00:27:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253821489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109033627] [2023-11-29 00:27:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:27:04,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:04,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:04,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:04,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:27:04,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:27:04,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:27:04,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 00:27:04,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:08,716 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base_BEFORE_CALL_13| Int) (|v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.offset_BEFORE_CALL_8| Int)) (not (= (select (select |c_#memory_$Pointer$#4.offset| |v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base_BEFORE_CALL_13|) (+ |v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.offset_BEFORE_CALL_8| 8)) 0))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base_BEFORE_CALL_13| Int) (|v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.offset_BEFORE_CALL_8| Int)) (not (= (select (select |c_#memory_$Pointer$#4.base| |v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base_BEFORE_CALL_13|) (+ |v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.offset_BEFORE_CALL_8| 8)) 0)))) is different from true [2023-11-29 00:27:16,784 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.offset_BEFORE_CALL_9| Int)) (not (= (select (select |c_#memory_$Pointer$#4.offset| |v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base_BEFORE_CALL_14|) (+ |v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.offset_BEFORE_CALL_9| 8)) 0))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.offset_BEFORE_CALL_9| Int)) (not (= (select (select |c_#memory_$Pointer$#4.base| |v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.base_BEFORE_CALL_14|) (+ |v_ULTIMATE.start_aws_byte_cursor_trim_pred_~source#1.offset_BEFORE_CALL_9| 8)) 0)))) is different from true [2023-11-29 00:27:24,893 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_11 Int) (v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_15 Int)) (not (= (select (select |c_#memory_$Pointer$#4.base| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_15) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_11)) 0))) (exists ((v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_11 Int) (v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_15 Int)) (not (= (select (select |c_#memory_$Pointer$#4.offset| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_15) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_11)) 0)))) is different from true [2023-11-29 00:27:40,990 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_12 Int) (v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_16 Int)) (not (= (select (select |c_#memory_$Pointer$#4.offset| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_16) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_12)) 0))) (exists ((v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_12 Int) (v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_16 Int)) (not (= (select (select |c_#memory_$Pointer$#4.base| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_16) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_12)) 0)))) is different from true [2023-11-29 00:27:45,191 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_17 Int) (v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_13 Int)) (not (= (select (select |c_#memory_$Pointer$#4.base| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_17) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_13)) 0))) (exists ((v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_17 Int) (v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_13 Int)) (not (= (select (select |c_#memory_$Pointer$#4.offset| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_17) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_13)) 0)))) is different from true [2023-11-29 00:28:13,271 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_14 Int) (v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_18 Int)) (not (= (select (select |c_#memory_$Pointer$#4.offset| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_18) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_14)) 0))) (exists ((v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_14 Int) (v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_18 Int)) (not (= (select (select |c_#memory_$Pointer$#4.base| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_18) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_14)) 0)))) is different from true [2023-11-29 00:28:21,336 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_15 Int) (v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_19 Int)) (not (= (select (select |c_#memory_$Pointer$#4.base| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_19) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_15)) 0))) (exists ((v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_15 Int) (v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_19 Int)) (not (= (select (select |c_#memory_$Pointer$#4.offset| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_19) (+ 8 v_aws_byte_cursor_left_trim_pred_~source.offset_BEFORE_CALL_15)) 0)))) is different from true [2023-11-29 00:28:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 43 not checked. [2023-11-29 00:28:33,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:28:38,143 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 00:28:38,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2023-11-29 00:28:38,150 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-29 00:28:38,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2023-11-29 00:28:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 00:28:38,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109033627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:28:38,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:28:38,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 20, 13] total 33 [2023-11-29 00:28:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418601730] [2023-11-29 00:28:38,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:28:38,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 00:28:38,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:28:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 00:28:38,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=581, Unknown=11, NotChecked=378, Total=1056 [2023-11-29 00:28:38,172 INFO L87 Difference]: Start difference. First operand 286 states and 426 transitions. Second operand has 33 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 5 states have call successors, (29), 10 states have call predecessors, (29), 12 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-29 00:28:44,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:48,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:28:56,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:00,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:08,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:12,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:20,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:24,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:28,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:40,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:48,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:52,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:29:56,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:30:00,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:30:16,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:30:24,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:30:28,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:30:32,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:30:36,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:30:57,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:05,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:09,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:13,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:17,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:21,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:25,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:29,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:33,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:37,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:31:57,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:32:05,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:32:09,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:32:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:55,556 INFO L93 Difference]: Finished difference Result 540 states and 835 transitions. [2023-11-29 00:32:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 00:32:55,556 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 5 states have call successors, (29), 10 states have call predecessors, (29), 12 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 105 [2023-11-29 00:32:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:55,559 INFO L225 Difference]: With dead ends: 540 [2023-11-29 00:32:55,559 INFO L226 Difference]: Without dead ends: 397 [2023-11-29 00:32:55,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 208 SyntacticMatches, 16 SemanticMatches, 58 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 218.0s TimeCoverageRelationStatistics Valid=394, Invalid=2354, Unknown=36, NotChecked=756, Total=3540 [2023-11-29 00:32:55,562 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 134 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 32 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 4734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 2327 IncrementalHoareTripleChecker+Unchecked, 132.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:55,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1891 Invalid, 4734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2343 Invalid, 32 Unknown, 2327 Unchecked, 132.2s Time] [2023-11-29 00:32:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-29 00:32:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 354. [2023-11-29 00:32:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 212 states have (on average 1.1556603773584906) internal successors, (245), 220 states have internal predecessors, (245), 110 states have call successors, (110), 26 states have call predecessors, (110), 31 states have return successors, (175), 107 states have call predecessors, (175), 106 states have call successors, (175) [2023-11-29 00:32:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 530 transitions. [2023-11-29 00:32:55,604 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 530 transitions. Word has length 105 [2023-11-29 00:32:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:55,604 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 530 transitions. [2023-11-29 00:32:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 states have internal predecessors, (106), 5 states have call successors, (29), 10 states have call predecessors, (29), 12 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-29 00:32:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 530 transitions. [2023-11-29 00:32:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-29 00:32:55,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:55,606 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:32:55,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:32:55,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:32:55,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:55,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash 801725784, now seen corresponding path program 1 times [2023-11-29 00:32:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:55,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941558993] [2023-11-29 00:32:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:55,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:32:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:32:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:32:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 00:32:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 00:32:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:32:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-29 00:32:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-29 00:32:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-29 00:32:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 00:32:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-29 00:32:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-29 00:32:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-29 00:32:56,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:56,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941558993] [2023-11-29 00:32:56,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941558993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:56,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:56,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:32:56,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440813618] [2023-11-29 00:32:56,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:56,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:32:56,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:56,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:32:56,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:32:56,336 INFO L87 Difference]: Start difference. First operand 354 states and 530 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-29 00:32:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:32:56,986 INFO L93 Difference]: Finished difference Result 653 states and 1037 transitions. [2023-11-29 00:32:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:32:56,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 107 [2023-11-29 00:32:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:32:56,990 INFO L225 Difference]: With dead ends: 653 [2023-11-29 00:32:56,990 INFO L226 Difference]: Without dead ends: 342 [2023-11-29 00:32:56,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:32:56,993 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 10 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:32:56,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 356 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:32:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-29 00:32:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2023-11-29 00:32:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 202 states have (on average 1.1336633663366336) internal successors, (229), 208 states have internal predecessors, (229), 110 states have call successors, (110), 26 states have call predecessors, (110), 29 states have return successors, (172), 107 states have call predecessors, (172), 106 states have call successors, (172) [2023-11-29 00:32:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 511 transitions. [2023-11-29 00:32:57,051 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 511 transitions. Word has length 107 [2023-11-29 00:32:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:32:57,052 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 511 transitions. [2023-11-29 00:32:57,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-29 00:32:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 511 transitions. [2023-11-29 00:32:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-29 00:32:57,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:32:57,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:32:57,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 00:32:57,054 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:32:57,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:32:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash -436421137, now seen corresponding path program 1 times [2023-11-29 00:32:57,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:32:57,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312003346] [2023-11-29 00:32:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:32:57,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:32:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:32:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:32:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:32:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 00:32:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 00:32:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:32:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-29 00:32:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-29 00:32:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-29 00:32:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 00:32:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-29 00:32:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-29 00:32:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-29 00:32:58,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:58,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312003346] [2023-11-29 00:32:58,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312003346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:32:58,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:32:58,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 00:32:58,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973945106] [2023-11-29 00:32:58,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:32:58,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:32:58,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:32:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:32:58,313 INFO L87 Difference]: Start difference. First operand 342 states and 511 transitions. Second operand has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-29 00:33:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:33:00,014 INFO L93 Difference]: Finished difference Result 350 states and 519 transitions. [2023-11-29 00:33:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:33:00,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2023-11-29 00:33:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:33:00,017 INFO L225 Difference]: With dead ends: 350 [2023-11-29 00:33:00,017 INFO L226 Difference]: Without dead ends: 348 [2023-11-29 00:33:00,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:33:00,018 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 41 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:33:00,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1441 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:33:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-29 00:33:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2023-11-29 00:33:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 205 states have (on average 1.1317073170731706) internal successors, (232), 211 states have internal predecessors, (232), 111 states have call successors, (111), 27 states have call predecessors, (111), 30 states have return successors, (173), 108 states have call predecessors, (173), 107 states have call successors, (173) [2023-11-29 00:33:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 516 transitions. [2023-11-29 00:33:00,076 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 516 transitions. Word has length 109 [2023-11-29 00:33:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:33:00,076 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 516 transitions. [2023-11-29 00:33:00,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-29 00:33:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 516 transitions. [2023-11-29 00:33:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-29 00:33:00,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:33:00,079 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:33:00,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 00:33:00,079 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:33:00,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:33:00,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1343856387, now seen corresponding path program 1 times [2023-11-29 00:33:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:33:00,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003556978] [2023-11-29 00:33:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:00,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:33:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:33:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:33:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:33:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 00:33:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 00:33:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:33:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-29 00:33:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-29 00:33:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-29 00:33:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-29 00:33:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-29 00:33:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-29 00:33:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 00:33:02,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:33:02,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003556978] [2023-11-29 00:33:02,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003556978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:33:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490046780] [2023-11-29 00:33:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:33:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:33:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:33:02,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:33:02,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:33:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:33:02,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 00:33:02,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:33:03,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-29 00:33:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 77 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:33:03,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:33:04,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 00:33:04,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 00:33:04,712 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 00:33:04,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 00:33:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 00:33:04,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490046780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:33:04,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:33:04,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 16] total 42 [2023-11-29 00:33:04,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783950749] [2023-11-29 00:33:04,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:33:04,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 00:33:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:33:04,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 00:33:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 00:33:04,753 INFO L87 Difference]: Start difference. First operand 347 states and 516 transitions. Second operand has 42 states, 40 states have (on average 3.675) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (36), 7 states have call predecessors, (36), 10 states have return successors, (32), 9 states have call predecessors, (32), 12 states have call successors, (32) [2023-11-29 00:33:11,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:16,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:21,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:25,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:29,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:33,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:37,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:42,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:46,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:50,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:33:56,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:00,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:05,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:09,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:13,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:17,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:21,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:25,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:29,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:34,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:38,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:42,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:46,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:50,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:54,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:34:58,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:35:02,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:35:07,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:35:11,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:35:15,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:35:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:35:16,615 INFO L93 Difference]: Finished difference Result 1076 states and 1556 transitions. [2023-11-29 00:35:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 00:35:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 3.675) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (36), 7 states have call predecessors, (36), 10 states have return successors, (32), 9 states have call predecessors, (32), 12 states have call successors, (32) Word has length 110 [2023-11-29 00:35:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:35:16,620 INFO L225 Difference]: With dead ends: 1076 [2023-11-29 00:35:16,621 INFO L226 Difference]: Without dead ends: 742 [2023-11-29 00:35:16,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 217 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2918 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1419, Invalid=8481, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 00:35:16,626 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 627 mSDsluCounter, 2139 mSDsCounter, 0 mSdLazyCounter, 5242 mSolverCounterSat, 441 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 5713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 5242 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:35:16,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 2275 Invalid, 5713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 5242 Invalid, 30 Unknown, 0 Unchecked, 129.1s Time] [2023-11-29 00:35:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2023-11-29 00:35:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 702. [2023-11-29 00:35:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 425 states have (on average 1.131764705882353) internal successors, (481), 439 states have internal predecessors, (481), 207 states have call successors, (207), 62 states have call predecessors, (207), 69 states have return successors, (315), 200 states have call predecessors, (315), 197 states have call successors, (315) [2023-11-29 00:35:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1003 transitions. [2023-11-29 00:35:16,720 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1003 transitions. Word has length 110 [2023-11-29 00:35:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:35:16,720 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 1003 transitions. [2023-11-29 00:35:16,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 3.675) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (36), 7 states have call predecessors, (36), 10 states have return successors, (32), 9 states have call predecessors, (32), 12 states have call successors, (32) [2023-11-29 00:35:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1003 transitions. [2023-11-29 00:35:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 00:35:16,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:35:16,723 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:16,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:35:16,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:35:16,924 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:35:16,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash 19253210, now seen corresponding path program 1 times [2023-11-29 00:35:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:35:16,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102618767] [2023-11-29 00:35:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:35:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:35:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:35:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:35:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:35:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:35:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:35:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:35:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:35:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:35:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:35:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:35:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:35:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:35:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:35:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:35:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:35:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 00:35:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-29 00:35:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-29 00:35:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-11-29 00:35:17,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:35:17,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102618767] [2023-11-29 00:35:17,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102618767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:35:17,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973332047] [2023-11-29 00:35:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:17,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:17,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:17,301 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:35:17,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:35:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:17,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:35:17,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 85 proven. 76 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-29 00:35:17,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-11-29 00:35:17,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973332047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:35:17,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:35:17,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 00:35:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050089878] [2023-11-29 00:35:17,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:17,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:35:17,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:35:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:35:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:35:17,958 INFO L87 Difference]: Start difference. First operand 702 states and 1003 transitions. Second operand has 15 states, 12 states have (on average 6.75) internal successors, (81), 14 states have internal predecessors, (81), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) [2023-11-29 00:35:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:35:19,858 INFO L93 Difference]: Finished difference Result 1122 states and 1616 transitions. [2023-11-29 00:35:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:35:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 6.75) internal successors, (81), 14 states have internal predecessors, (81), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) Word has length 127 [2023-11-29 00:35:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:35:19,863 INFO L225 Difference]: With dead ends: 1122 [2023-11-29 00:35:19,863 INFO L226 Difference]: Without dead ends: 702 [2023-11-29 00:35:19,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:35:19,865 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 140 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:35:19,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 425 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 00:35:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-11-29 00:35:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2023-11-29 00:35:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 425 states have (on average 1.131764705882353) internal successors, (481), 439 states have internal predecessors, (481), 207 states have call successors, (207), 62 states have call predecessors, (207), 69 states have return successors, (299), 200 states have call predecessors, (299), 197 states have call successors, (299) [2023-11-29 00:35:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 987 transitions. [2023-11-29 00:35:19,966 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 987 transitions. Word has length 127 [2023-11-29 00:35:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:35:19,967 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 987 transitions. [2023-11-29 00:35:19,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 6.75) internal successors, (81), 14 states have internal predecessors, (81), 10 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (40), 7 states have call predecessors, (40), 10 states have call successors, (40) [2023-11-29 00:35:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 987 transitions. [2023-11-29 00:35:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-29 00:35:19,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:35:19,970 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:35:19,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 00:35:20,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:20,171 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:35:20,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:35:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1922760040, now seen corresponding path program 1 times [2023-11-29 00:35:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:35:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103056719] [2023-11-29 00:35:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:35:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:23,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:35:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:23,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:35:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:23,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 00:35:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:35:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-29 00:35:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 00:35:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 00:35:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 00:35:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 00:35:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-29 00:35:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-29 00:35:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 00:35:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-29 00:35:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 00:35:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:35:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 29 proven. 20 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 00:35:24,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:35:24,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103056719] [2023-11-29 00:35:24,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103056719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:35:24,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795711929] [2023-11-29 00:35:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:35:24,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:35:24,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:35:24,494 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:35:24,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:35:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:35:24,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 00:35:24,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:35:37,866 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 00:35:37,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2023-11-29 00:35:37,881 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 00:35:37,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-11-29 00:35:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 96 proven. 7 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 00:35:39,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:35:40,093 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 00:35:40,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 00:35:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795711929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:35:44,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:35:44,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2023-11-29 00:35:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380064639] [2023-11-29 00:35:44,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:35:44,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:35:44,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:35:44,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:35:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2741, Unknown=5, NotChecked=0, Total=2970 [2023-11-29 00:35:44,406 INFO L87 Difference]: Start difference. First operand 702 states and 987 transitions. Second operand has 45 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 40 states have internal predecessors, (106), 17 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (30), 14 states have call predecessors, (30), 16 states have call successors, (30) [2023-11-29 00:35:51,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:35:56,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:00,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:04,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:08,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:13,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:17,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:21,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:27,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:33,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:39,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:43,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:48,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:53,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:36:57,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:01,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:05,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:09,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:14,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:15,402 INFO L93 Difference]: Finished difference Result 1308 states and 1762 transitions. [2023-11-29 00:37:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 00:37:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 40 states have internal predecessors, (106), 17 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (30), 14 states have call predecessors, (30), 16 states have call successors, (30) Word has length 126 [2023-11-29 00:37:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:15,409 INFO L225 Difference]: With dead ends: 1308 [2023-11-29 00:37:15,409 INFO L226 Difference]: Without dead ends: 1167 [2023-11-29 00:37:15,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1242, Invalid=11409, Unknown=5, NotChecked=0, Total=12656 [2023-11-29 00:37:15,414 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 436 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 444 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 6179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:15,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 970 Invalid, 6179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 5716 Invalid, 19 Unknown, 0 Unchecked, 86.9s Time] [2023-11-29 00:37:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2023-11-29 00:37:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 995. [2023-11-29 00:37:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 627 states have (on average 1.1403508771929824) internal successors, (715), 656 states have internal predecessors, (715), 256 states have call successors, (256), 93 states have call predecessors, (256), 111 states have return successors, (393), 245 states have call predecessors, (393), 240 states have call successors, (393) [2023-11-29 00:37:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1364 transitions. [2023-11-29 00:37:15,622 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1364 transitions. Word has length 126 [2023-11-29 00:37:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:15,622 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1364 transitions. [2023-11-29 00:37:15,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 40 states have internal predecessors, (106), 17 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (30), 14 states have call predecessors, (30), 16 states have call successors, (30) [2023-11-29 00:37:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1364 transitions. [2023-11-29 00:37:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 00:37:15,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:15,626 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:15,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:37:15,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:37:15,826 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:15,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:15,827 INFO L85 PathProgramCache]: Analyzing trace with hash -319509168, now seen corresponding path program 1 times [2023-11-29 00:37:15,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:15,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273531531] [2023-11-29 00:37:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:15,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:37:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:37:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:37:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:37:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:37:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:37:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:37:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:37:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:37:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:37:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:37:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:37:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:37:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:37:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:37:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:37:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:37:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:37:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:37:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-11-29 00:37:16,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:16,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273531531] [2023-11-29 00:37:16,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273531531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:37:16,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:37:16,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:37:16,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102603567] [2023-11-29 00:37:16,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:37:16,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:37:16,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:16,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:37:16,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:37:16,430 INFO L87 Difference]: Start difference. First operand 995 states and 1364 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2023-11-29 00:37:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:18,225 INFO L93 Difference]: Finished difference Result 1060 states and 1438 transitions. [2023-11-29 00:37:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:37:18,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 131 [2023-11-29 00:37:18,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:18,232 INFO L225 Difference]: With dead ends: 1060 [2023-11-29 00:37:18,232 INFO L226 Difference]: Without dead ends: 1058 [2023-11-29 00:37:18,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:37:18,234 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 49 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:18,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 531 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:37:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2023-11-29 00:37:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1045. [2023-11-29 00:37:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 657 states have (on average 1.1339421613394216) internal successors, (745), 686 states have internal predecessors, (745), 266 states have call successors, (266), 103 states have call predecessors, (266), 121 states have return successors, (403), 255 states have call predecessors, (403), 250 states have call successors, (403) [2023-11-29 00:37:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1414 transitions. [2023-11-29 00:37:18,414 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1414 transitions. Word has length 131 [2023-11-29 00:37:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:18,415 INFO L495 AbstractCegarLoop]: Abstraction has 1045 states and 1414 transitions. [2023-11-29 00:37:18,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2023-11-29 00:37:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1414 transitions. [2023-11-29 00:37:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-29 00:37:18,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:18,418 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:18,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 00:37:18,419 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:18,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:18,419 INFO L85 PathProgramCache]: Analyzing trace with hash -824588536, now seen corresponding path program 1 times [2023-11-29 00:37:18,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:18,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963632088] [2023-11-29 00:37:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:37:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:37:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:37:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:37:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:37:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:37:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:37:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:37:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:37:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:37:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:37:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:37:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:37:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:37:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:37:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:37:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:37:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:37:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:37:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-11-29 00:37:19,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:19,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963632088] [2023-11-29 00:37:19,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963632088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:37:19,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:37:19,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 00:37:19,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970985015] [2023-11-29 00:37:19,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:37:19,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:37:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:19,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:37:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:37:19,510 INFO L87 Difference]: Start difference. First operand 1045 states and 1414 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-29 00:37:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:21,781 INFO L93 Difference]: Finished difference Result 1678 states and 2272 transitions. [2023-11-29 00:37:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:37:21,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 3 states have call successors, (19) Word has length 135 [2023-11-29 00:37:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:21,788 INFO L225 Difference]: With dead ends: 1678 [2023-11-29 00:37:21,788 INFO L226 Difference]: Without dead ends: 1041 [2023-11-29 00:37:21,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:37:21,792 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 54 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:21,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 457 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:37:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2023-11-29 00:37:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1037. [2023-11-29 00:37:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 657 states have (on average 1.1339421613394216) internal successors, (745), 686 states have internal predecessors, (745), 258 states have call successors, (258), 103 states have call predecessors, (258), 121 states have return successors, (369), 247 states have call predecessors, (369), 242 states have call successors, (369) [2023-11-29 00:37:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1372 transitions. [2023-11-29 00:37:21,999 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1372 transitions. Word has length 135 [2023-11-29 00:37:22,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:22,000 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1372 transitions. [2023-11-29 00:37:22,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-29 00:37:22,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1372 transitions. [2023-11-29 00:37:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-29 00:37:22,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:22,003 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:22,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 00:37:22,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:22,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1513866318, now seen corresponding path program 1 times [2023-11-29 00:37:22,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:22,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186005366] [2023-11-29 00:37:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:22,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:22,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:37:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:22,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:37:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 00:37:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:37:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-29 00:37:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 00:37:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 00:37:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 00:37:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 00:37:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-29 00:37:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-29 00:37:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 00:37:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-29 00:37:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 00:37:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-11-29 00:37:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-29 00:37:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-11-29 00:37:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-11-29 00:37:23,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:23,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186005366] [2023-11-29 00:37:23,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186005366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:37:23,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558523095] [2023-11-29 00:37:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:23,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:37:23,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:37:23,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:37:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:23,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 2758 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 00:37:23,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 99 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-29 00:37:25,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:25,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 00:37:25,638 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 00:37:25,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2023-11-29 00:37:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-11-29 00:37:25,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558523095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:25,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:37:25,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 25 [2023-11-29 00:37:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10944639] [2023-11-29 00:37:25,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:37:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:37:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:37:25,653 INFO L87 Difference]: Start difference. First operand 1037 states and 1372 transitions. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 22 states have internal predecessors, (119), 9 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2023-11-29 00:37:30,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:35,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:39,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:43,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:47,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:51,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:37:56,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:00,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:04,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:08,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:13,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:17,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:21,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:25,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:29,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:34,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:38,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:42,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:38:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:38:43,155 INFO L93 Difference]: Finished difference Result 1448 states and 1918 transitions. [2023-11-29 00:38:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 00:38:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 22 states have internal predecessors, (119), 9 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 136 [2023-11-29 00:38:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:38:43,161 INFO L225 Difference]: With dead ends: 1448 [2023-11-29 00:38:43,161 INFO L226 Difference]: Without dead ends: 789 [2023-11-29 00:38:43,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 275 SyntacticMatches, 26 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 00:38:43,163 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 211 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 150 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:38:43,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 981 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2613 Invalid, 18 Unknown, 0 Unchecked, 76.7s Time] [2023-11-29 00:38:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2023-11-29 00:38:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 507. [2023-11-29 00:38:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 322 states have (on average 1.1459627329192548) internal successors, (369), 338 states have internal predecessors, (369), 124 states have call successors, (124), 50 states have call predecessors, (124), 60 states have return successors, (186), 118 states have call predecessors, (186), 118 states have call successors, (186) [2023-11-29 00:38:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 679 transitions. [2023-11-29 00:38:43,239 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 679 transitions. Word has length 136 [2023-11-29 00:38:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:38:43,239 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 679 transitions. [2023-11-29 00:38:43,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 22 states have internal predecessors, (119), 9 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2023-11-29 00:38:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 679 transitions. [2023-11-29 00:38:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 00:38:43,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:38:43,241 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:43,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:38:43,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:38:43,442 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:38:43,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:43,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1903021060, now seen corresponding path program 1 times [2023-11-29 00:38:43,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:38:43,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750888181] [2023-11-29 00:38:43,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:43,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:38:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:38:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:38:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:38:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:38:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:38:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:38:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:38:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:38:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:38:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:38:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:38:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:38:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:38:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:38:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:38:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:38:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-11-29 00:38:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-11-29 00:38:43,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:38:43,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750888181] [2023-11-29 00:38:43,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750888181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:38:43,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:38:43,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:38:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665443422] [2023-11-29 00:38:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:38:43,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:38:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:38:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:38:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:38:43,679 INFO L87 Difference]: Start difference. First operand 507 states and 679 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-29 00:38:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:38:44,512 INFO L93 Difference]: Finished difference Result 687 states and 913 transitions. [2023-11-29 00:38:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:38:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 138 [2023-11-29 00:38:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:38:44,516 INFO L225 Difference]: With dead ends: 687 [2023-11-29 00:38:44,517 INFO L226 Difference]: Without dead ends: 512 [2023-11-29 00:38:44,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:38:44,518 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 31 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:38:44,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 179 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:38:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-11-29 00:38:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2023-11-29 00:38:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 327 states have (on average 1.143730886850153) internal successors, (374), 343 states have internal predecessors, (374), 124 states have call successors, (124), 50 states have call predecessors, (124), 60 states have return successors, (186), 118 states have call predecessors, (186), 118 states have call successors, (186) [2023-11-29 00:38:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 684 transitions. [2023-11-29 00:38:44,590 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 684 transitions. Word has length 138 [2023-11-29 00:38:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:38:44,590 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 684 transitions. [2023-11-29 00:38:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-29 00:38:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 684 transitions. [2023-11-29 00:38:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-29 00:38:44,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:38:44,592 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:44,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 00:38:44,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:38:44,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:44,592 INFO L85 PathProgramCache]: Analyzing trace with hash -651730309, now seen corresponding path program 1 times [2023-11-29 00:38:44,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:38:44,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101837453] [2023-11-29 00:38:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:44,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:38:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:38:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:38:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:38:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:38:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:38:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:38:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:38:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:38:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:38:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:38:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:38:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:38:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:38:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:38:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:38:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:38:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:38:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:38:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:44,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 00:38:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2023-11-29 00:38:45,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:38:45,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101837453] [2023-11-29 00:38:45,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101837453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:38:45,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:38:45,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:38:45,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715589871] [2023-11-29 00:38:45,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:38:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:38:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:38:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:38:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:38:45,002 INFO L87 Difference]: Start difference. First operand 512 states and 684 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 00:38:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:38:46,246 INFO L93 Difference]: Finished difference Result 734 states and 983 transitions. [2023-11-29 00:38:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:38:46,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 142 [2023-11-29 00:38:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:38:46,249 INFO L225 Difference]: With dead ends: 734 [2023-11-29 00:38:46,249 INFO L226 Difference]: Without dead ends: 514 [2023-11-29 00:38:46,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:38:46,250 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 45 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:38:46,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 284 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:38:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-11-29 00:38:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2023-11-29 00:38:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 327 states have (on average 1.143730886850153) internal successors, (374), 343 states have internal predecessors, (374), 124 states have call successors, (124), 50 states have call predecessors, (124), 60 states have return successors, (181), 118 states have call predecessors, (181), 118 states have call successors, (181) [2023-11-29 00:38:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 679 transitions. [2023-11-29 00:38:46,322 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 679 transitions. Word has length 142 [2023-11-29 00:38:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:38:46,323 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 679 transitions. [2023-11-29 00:38:46,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-29 00:38:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 679 transitions. [2023-11-29 00:38:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-29 00:38:46,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:38:46,325 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:46,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 00:38:46,325 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:38:46,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1196172570, now seen corresponding path program 1 times [2023-11-29 00:38:46,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:38:46,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737896879] [2023-11-29 00:38:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:46,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:38:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:46,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:38:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:38:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:38:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:38:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:38:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:38:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:38:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:38:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:38:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:38:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:38:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:38:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:38:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:38:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:38:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:38:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-29 00:38:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:38:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-11-29 00:38:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:38:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737896879] [2023-11-29 00:38:47,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737896879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:38:47,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:38:47,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 00:38:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507984861] [2023-11-29 00:38:47,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:38:47,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:38:47,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:38:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:38:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:38:47,255 INFO L87 Difference]: Start difference. First operand 512 states and 679 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-29 00:38:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:38:49,437 INFO L93 Difference]: Finished difference Result 750 states and 994 transitions. [2023-11-29 00:38:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:38:49,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 142 [2023-11-29 00:38:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:38:49,441 INFO L225 Difference]: With dead ends: 750 [2023-11-29 00:38:49,441 INFO L226 Difference]: Without dead ends: 502 [2023-11-29 00:38:49,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:38:49,442 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 42 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:38:49,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 445 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:38:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-29 00:38:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2023-11-29 00:38:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 321 states have (on average 1.1339563862928348) internal successors, (364), 337 states have internal predecessors, (364), 122 states have call successors, (122), 48 states have call predecessors, (122), 58 states have return successors, (179), 116 states have call predecessors, (179), 116 states have call successors, (179) [2023-11-29 00:38:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 665 transitions. [2023-11-29 00:38:49,532 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 665 transitions. Word has length 142 [2023-11-29 00:38:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:38:49,532 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 665 transitions. [2023-11-29 00:38:49,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-29 00:38:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 665 transitions. [2023-11-29 00:38:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 00:38:49,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:38:49,534 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:49,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 00:38:49,534 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:38:49,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1055108426, now seen corresponding path program 1 times [2023-11-29 00:38:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:38:49,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589399056] [2023-11-29 00:38:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:49,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:38:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:38:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:38:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:38:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:38:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:38:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:38:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:38:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:38:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:38:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:38:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:38:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:38:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:38:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:38:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:38:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:38:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:38:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:38:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 00:38:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2023-11-29 00:38:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:38:50,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589399056] [2023-11-29 00:38:50,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589399056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:38:50,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:38:50,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:38:50,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053196635] [2023-11-29 00:38:50,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:38:50,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:38:50,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:38:50,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:38:50,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:38:50,158 INFO L87 Difference]: Start difference. First operand 502 states and 665 transitions. Second operand has 9 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-29 00:38:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:38:51,740 INFO L93 Difference]: Finished difference Result 537 states and 704 transitions. [2023-11-29 00:38:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:38:51,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 144 [2023-11-29 00:38:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:38:51,743 INFO L225 Difference]: With dead ends: 537 [2023-11-29 00:38:51,744 INFO L226 Difference]: Without dead ends: 535 [2023-11-29 00:38:51,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:38:51,745 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 49 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:38:51,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 530 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:38:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-11-29 00:38:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 527. [2023-11-29 00:38:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 336 states have (on average 1.1279761904761905) internal successors, (379), 352 states have internal predecessors, (379), 127 states have call successors, (127), 53 states have call predecessors, (127), 63 states have return successors, (184), 121 states have call predecessors, (184), 121 states have call successors, (184) [2023-11-29 00:38:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 690 transitions. [2023-11-29 00:38:51,844 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 690 transitions. Word has length 144 [2023-11-29 00:38:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:38:51,845 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 690 transitions. [2023-11-29 00:38:51,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-29 00:38:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 690 transitions. [2023-11-29 00:38:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-29 00:38:51,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:38:51,847 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:51,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 00:38:51,848 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:38:51,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:51,848 INFO L85 PathProgramCache]: Analyzing trace with hash 527359809, now seen corresponding path program 1 times [2023-11-29 00:38:51,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:38:51,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613796015] [2023-11-29 00:38:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:51,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:38:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:38:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 00:38:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-29 00:38:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 00:38:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 00:38:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 00:38:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 00:38:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-29 00:38:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-29 00:38:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 00:38:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-29 00:38:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 00:38:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-11-29 00:38:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-11-29 00:38:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:38:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-11-29 00:38:54,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:38:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613796015] [2023-11-29 00:38:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613796015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:38:54,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:38:54,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-29 00:38:54,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485037863] [2023-11-29 00:38:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:38:54,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:38:54,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:38:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:38:54,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:38:54,381 INFO L87 Difference]: Start difference. First operand 527 states and 690 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 9 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-29 00:38:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:38:57,278 INFO L93 Difference]: Finished difference Result 884 states and 1184 transitions. [2023-11-29 00:38:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:38:57,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 9 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 142 [2023-11-29 00:38:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:38:57,282 INFO L225 Difference]: With dead ends: 884 [2023-11-29 00:38:57,282 INFO L226 Difference]: Without dead ends: 587 [2023-11-29 00:38:57,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:38:57,284 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 133 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:38:57,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 845 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 00:38:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2023-11-29 00:38:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 527. [2023-11-29 00:38:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 336 states have (on average 1.1279761904761905) internal successors, (379), 352 states have internal predecessors, (379), 127 states have call successors, (127), 53 states have call predecessors, (127), 63 states have return successors, (179), 121 states have call predecessors, (179), 121 states have call successors, (179) [2023-11-29 00:38:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 685 transitions. [2023-11-29 00:38:57,362 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 685 transitions. Word has length 142 [2023-11-29 00:38:57,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:38:57,362 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 685 transitions. [2023-11-29 00:38:57,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 9 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-29 00:38:57,363 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 685 transitions. [2023-11-29 00:38:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 00:38:57,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:38:57,364 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 00:38:57,365 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:38:57,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2061674854, now seen corresponding path program 1 times [2023-11-29 00:38:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:38:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805356197] [2023-11-29 00:38:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:57,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:38:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:38:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 00:38:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:38:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-29 00:38:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 00:38:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 00:38:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 00:38:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 00:38:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-29 00:38:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-29 00:38:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-29 00:38:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-29 00:38:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-29 00:38:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-11-29 00:38:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-11-29 00:38:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:38:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-29 00:38:58,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:38:58,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805356197] [2023-11-29 00:38:58,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805356197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:38:58,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:38:58,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-29 00:38:58,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114140022] [2023-11-29 00:38:58,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:38:58,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:38:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:38:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:38:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:38:58,654 INFO L87 Difference]: Start difference. First operand 527 states and 685 transitions. Second operand has 14 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-29 00:39:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:39:01,229 INFO L93 Difference]: Finished difference Result 549 states and 709 transitions. [2023-11-29 00:39:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:39:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 144 [2023-11-29 00:39:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:39:01,232 INFO L225 Difference]: With dead ends: 549 [2023-11-29 00:39:01,232 INFO L226 Difference]: Without dead ends: 547 [2023-11-29 00:39:01,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:39:01,233 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 71 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:39:01,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 837 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 00:39:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-29 00:39:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 525. [2023-11-29 00:39:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 336 states have (on average 1.1279761904761905) internal successors, (379), 352 states have internal predecessors, (379), 125 states have call successors, (125), 53 states have call predecessors, (125), 63 states have return successors, (177), 119 states have call predecessors, (177), 119 states have call successors, (177) [2023-11-29 00:39:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 681 transitions. [2023-11-29 00:39:01,307 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 681 transitions. Word has length 144 [2023-11-29 00:39:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:39:01,307 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 681 transitions. [2023-11-29 00:39:01,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-29 00:39:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 681 transitions. [2023-11-29 00:39:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-29 00:39:01,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:39:01,309 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:01,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 00:39:01,309 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:39:01,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1642596718, now seen corresponding path program 1 times [2023-11-29 00:39:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:01,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312677273] [2023-11-29 00:39:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:01,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:39:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:39:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:39:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:39:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:39:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:39:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:39:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:39:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:39:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:39:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:39:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:39:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:39:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:39:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:39:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:39:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:39:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:39:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 00:39:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2023-11-29 00:39:02,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:02,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312677273] [2023-11-29 00:39:02,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312677273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:02,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:02,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-29 00:39:02,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605210384] [2023-11-29 00:39:02,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:02,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:39:02,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:39:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:39:02,545 INFO L87 Difference]: Start difference. First operand 525 states and 681 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-29 00:39:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:39:05,309 INFO L93 Difference]: Finished difference Result 632 states and 818 transitions. [2023-11-29 00:39:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:39:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) Word has length 148 [2023-11-29 00:39:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:39:05,312 INFO L225 Difference]: With dead ends: 632 [2023-11-29 00:39:05,313 INFO L226 Difference]: Without dead ends: 527 [2023-11-29 00:39:05,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:39:05,314 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 77 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:39:05,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 520 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 00:39:05,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-11-29 00:39:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 523. [2023-11-29 00:39:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 336 states have (on average 1.1279761904761905) internal successors, (379), 352 states have internal predecessors, (379), 123 states have call successors, (123), 53 states have call predecessors, (123), 63 states have return successors, (172), 117 states have call predecessors, (172), 117 states have call successors, (172) [2023-11-29 00:39:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 674 transitions. [2023-11-29 00:39:05,386 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 674 transitions. Word has length 148 [2023-11-29 00:39:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:39:05,386 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 674 transitions. [2023-11-29 00:39:05,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-29 00:39:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 674 transitions. [2023-11-29 00:39:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-29 00:39:05,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:39:05,388 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:05,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-29 00:39:05,388 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:39:05,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1610668380, now seen corresponding path program 1 times [2023-11-29 00:39:05,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:05,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556996471] [2023-11-29 00:39:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:05,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:39:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:39:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:39:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:39:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:39:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:39:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:39:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:39:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:39:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:39:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:39:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:39:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:39:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:39:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:39:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:39:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:39:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:39:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 00:39:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 00:39:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-11-29 00:39:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-11-29 00:39:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556996471] [2023-11-29 00:39:05,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556996471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:05,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:05,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:39:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745356728] [2023-11-29 00:39:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:05,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:39:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:39:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:39:05,996 INFO L87 Difference]: Start difference. First operand 523 states and 674 transitions. Second operand has 9 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-11-29 00:39:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:39:07,715 INFO L93 Difference]: Finished difference Result 550 states and 703 transitions. [2023-11-29 00:39:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:39:07,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 157 [2023-11-29 00:39:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:39:07,720 INFO L225 Difference]: With dead ends: 550 [2023-11-29 00:39:07,720 INFO L226 Difference]: Without dead ends: 548 [2023-11-29 00:39:07,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:39:07,721 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 49 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:39:07,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 529 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:39:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-29 00:39:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 542. [2023-11-29 00:39:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 348 states have (on average 1.1235632183908046) internal successors, (391), 364 states have internal predecessors, (391), 126 states have call successors, (126), 57 states have call predecessors, (126), 67 states have return successors, (175), 120 states have call predecessors, (175), 120 states have call successors, (175) [2023-11-29 00:39:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 692 transitions. [2023-11-29 00:39:07,820 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 692 transitions. Word has length 157 [2023-11-29 00:39:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:39:07,821 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 692 transitions. [2023-11-29 00:39:07,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2023-11-29 00:39:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 692 transitions. [2023-11-29 00:39:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-29 00:39:07,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:39:07,823 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:07,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-29 00:39:07,823 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:39:07,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 626688687, now seen corresponding path program 1 times [2023-11-29 00:39:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894658013] [2023-11-29 00:39:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:39:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:39:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:39:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:39:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:39:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:39:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:39:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:39:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:39:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:39:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:39:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:39:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:39:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:39:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:39:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:39:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:39:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:39:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 00:39:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 00:39:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-11-29 00:39:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-11-29 00:39:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2023-11-29 00:39:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2023-11-29 00:39:08,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:08,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894658013] [2023-11-29 00:39:08,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894658013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:08,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:08,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:39:08,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976351248] [2023-11-29 00:39:08,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:08,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:39:08,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:39:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:39:08,251 INFO L87 Difference]: Start difference. First operand 542 states and 692 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-29 00:39:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:39:09,490 INFO L93 Difference]: Finished difference Result 728 states and 914 transitions. [2023-11-29 00:39:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:39:09,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 168 [2023-11-29 00:39:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:39:09,494 INFO L225 Difference]: With dead ends: 728 [2023-11-29 00:39:09,494 INFO L226 Difference]: Without dead ends: 538 [2023-11-29 00:39:09,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:39:09,496 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 45 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:39:09,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 291 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:39:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-11-29 00:39:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2023-11-29 00:39:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 345 states have (on average 1.1159420289855073) internal successors, (385), 358 states have internal predecessors, (385), 126 states have call successors, (126), 57 states have call predecessors, (126), 64 states have return successors, (170), 120 states have call predecessors, (170), 120 states have call successors, (170) [2023-11-29 00:39:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 681 transitions. [2023-11-29 00:39:09,606 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 681 transitions. Word has length 168 [2023-11-29 00:39:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:39:09,606 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 681 transitions. [2023-11-29 00:39:09,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-29 00:39:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 681 transitions. [2023-11-29 00:39:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-29 00:39:09,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:39:09,609 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:09,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-29 00:39:09,609 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:39:09,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash 413398506, now seen corresponding path program 1 times [2023-11-29 00:39:09,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:09,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033272847] [2023-11-29 00:39:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:09,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:39:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:39:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:39:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:39:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:39:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:39:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:39:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:39:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:39:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:39:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:39:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:39:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:39:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:39:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:39:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:39:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:39:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:39:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 00:39:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 00:39:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-11-29 00:39:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-11-29 00:39:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2023-11-29 00:39:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2023-11-29 00:39:10,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033272847] [2023-11-29 00:39:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033272847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:10,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:10,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:39:10,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80985412] [2023-11-29 00:39:10,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:10,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:39:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:39:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:39:10,260 INFO L87 Difference]: Start difference. First operand 536 states and 681 transitions. Second operand has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-29 00:39:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:39:12,291 INFO L93 Difference]: Finished difference Result 571 states and 720 transitions. [2023-11-29 00:39:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:39:12,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 170 [2023-11-29 00:39:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:39:12,294 INFO L225 Difference]: With dead ends: 571 [2023-11-29 00:39:12,295 INFO L226 Difference]: Without dead ends: 569 [2023-11-29 00:39:12,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:39:12,296 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 49 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:39:12,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 529 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 00:39:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-11-29 00:39:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 561. [2023-11-29 00:39:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 360 states have (on average 1.1111111111111112) internal successors, (400), 373 states have internal predecessors, (400), 131 states have call successors, (131), 62 states have call predecessors, (131), 69 states have return successors, (175), 125 states have call predecessors, (175), 125 states have call successors, (175) [2023-11-29 00:39:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 706 transitions. [2023-11-29 00:39:12,386 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 706 transitions. Word has length 170 [2023-11-29 00:39:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:39:12,386 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 706 transitions. [2023-11-29 00:39:12,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2023-11-29 00:39:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 706 transitions. [2023-11-29 00:39:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-29 00:39:12,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:39:12,388 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:12,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-29 00:39:12,388 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:39:12,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1190497630, now seen corresponding path program 1 times [2023-11-29 00:39:12,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:12,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514659967] [2023-11-29 00:39:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:12,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:39:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:39:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:39:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:39:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:39:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:39:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:39:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:39:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:39:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:39:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:39:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:39:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:39:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:39:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:39:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:39:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:39:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:39:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 00:39:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 00:39:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-11-29 00:39:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-11-29 00:39:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2023-11-29 00:39:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2023-11-29 00:39:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514659967] [2023-11-29 00:39:13,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514659967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:13,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:13,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-29 00:39:13,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201149549] [2023-11-29 00:39:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:13,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:39:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:39:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:39:13,935 INFO L87 Difference]: Start difference. First operand 561 states and 706 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) [2023-11-29 00:39:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:39:16,813 INFO L93 Difference]: Finished difference Result 651 states and 812 transitions. [2023-11-29 00:39:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:39:16,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) Word has length 174 [2023-11-29 00:39:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:39:16,816 INFO L225 Difference]: With dead ends: 651 [2023-11-29 00:39:16,816 INFO L226 Difference]: Without dead ends: 563 [2023-11-29 00:39:16,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:39:16,817 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 56 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:39:16,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 532 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 00:39:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-11-29 00:39:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 559. [2023-11-29 00:39:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 360 states have (on average 1.1111111111111112) internal successors, (400), 373 states have internal predecessors, (400), 129 states have call successors, (129), 62 states have call predecessors, (129), 69 states have return successors, (170), 123 states have call predecessors, (170), 123 states have call successors, (170) [2023-11-29 00:39:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 699 transitions. [2023-11-29 00:39:16,902 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 699 transitions. Word has length 174 [2023-11-29 00:39:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:39:16,902 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 699 transitions. [2023-11-29 00:39:16,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) [2023-11-29 00:39:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 699 transitions. [2023-11-29 00:39:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-11-29 00:39:16,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:39:16,904 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:16,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-29 00:39:16,904 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:39:16,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1062915006, now seen corresponding path program 1 times [2023-11-29 00:39:16,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:16,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684980447] [2023-11-29 00:39:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:16,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:39:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-29 00:39:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:39:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 00:39:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 00:39:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-29 00:39:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:39:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 00:39:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:39:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 00:39:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-29 00:39:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-29 00:39:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 00:39:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-29 00:39:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-29 00:39:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 00:39:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 00:39:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-29 00:39:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-29 00:39:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-29 00:39:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-11-29 00:39:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-11-29 00:39:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2023-11-29 00:39:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2023-11-29 00:39:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-11-29 00:39:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-11-29 00:39:17,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:17,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684980447] [2023-11-29 00:39:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684980447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:17,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:17,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:39:17,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917146410] [2023-11-29 00:39:17,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:17,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:39:17,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:39:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:39:17,506 INFO L87 Difference]: Start difference. First operand 559 states and 699 transitions. Second operand has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-29 00:39:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:39:19,077 INFO L93 Difference]: Finished difference Result 574 states and 714 transitions. [2023-11-29 00:39:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:39:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 183 [2023-11-29 00:39:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:39:19,080 INFO L225 Difference]: With dead ends: 574 [2023-11-29 00:39:19,080 INFO L226 Difference]: Without dead ends: 572 [2023-11-29 00:39:19,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:39:19,081 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 49 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:39:19,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 529 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:39:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2023-11-29 00:39:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2023-11-29 00:39:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 366 states have (on average 1.1092896174863387) internal successors, (406), 379 states have internal predecessors, (406), 130 states have call successors, (130), 64 states have call predecessors, (130), 71 states have return successors, (171), 124 states have call predecessors, (171), 124 states have call successors, (171) [2023-11-29 00:39:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 707 transitions. [2023-11-29 00:39:19,157 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 707 transitions. Word has length 183 [2023-11-29 00:39:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:39:19,158 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 707 transitions. [2023-11-29 00:39:19,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-11-29 00:39:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 707 transitions. [2023-11-29 00:39:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-29 00:39:19,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:39:19,159 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-29 00:39:19,159 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:39:19,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1158028842, now seen corresponding path program 1 times [2023-11-29 00:39:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:19,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889174890] [2023-11-29 00:39:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 00:39:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 00:39:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-29 00:39:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-29 00:39:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-29 00:39:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 00:39:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 00:39:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-29 00:39:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-29 00:39:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:39:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 00:39:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 00:39:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 00:39:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 00:39:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 00:39:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-29 00:39:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-29 00:39:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2023-11-29 00:39:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-11-29 00:39:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2023-11-29 00:39:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2023-11-29 00:39:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 19 proven. 61 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-11-29 00:39:20,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889174890] [2023-11-29 00:39:20,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889174890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:39:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711042065] [2023-11-29 00:39:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:20,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:39:20,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7796e84-690a-4aef-8701-1db182e4de05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:39:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:21,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 00:39:21,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 200 proven. 3 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-11-29 00:39:22,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2023-11-29 00:39:23,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711042065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:23,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:39:23,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 28 [2023-11-29 00:39:23,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684583580] [2023-11-29 00:39:23,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:23,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 00:39:23,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 00:39:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=662, Unknown=1, NotChecked=0, Total=756 [2023-11-29 00:39:23,241 INFO L87 Difference]: Start difference. First operand 568 states and 707 transitions. Second operand has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 25 states have internal predecessors, (124), 10 states have call successors, (47), 6 states have call predecessors, (47), 6 states have return successors, (45), 10 states have call predecessors, (45), 10 states have call successors, (45) [2023-11-29 00:39:27,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:39:34,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:39:38,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:39:42,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:39:46,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:39:50,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:39:56,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:01,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:05,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:09,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:13,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:18,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:22,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:26,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:30,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:34,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:40:39,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]