./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.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_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6e8329de8885610e11451d8b1311f161005fbaac7c4b7180f37a9501d850f1ce --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:03:21,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:03:21,977 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-26 12:03:21,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:03:21,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:03:22,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:03:22,024 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:03:22,025 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:03:22,026 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:03:22,031 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:03:22,031 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:03:22,032 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:03:22,033 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:03:22,034 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:03:22,035 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:03:22,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:03:22,036 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:03:22,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:03:22,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:03:22,037 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:03:22,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:03:22,038 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:03:22,038 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:03:22,039 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:03:22,040 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:03:22,040 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:03:22,041 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:03:22,041 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:03:22,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:22,042 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:03:22,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:03:22,044 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:03:22,044 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:03:22,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:03:22,044 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:03:22,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:03:22,045 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:03:22,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:03:22,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:03:22,046 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_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e8329de8885610e11451d8b1311f161005fbaac7c4b7180f37a9501d850f1ce [2023-11-26 12:03:22,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:03:22,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:03:22,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:03:22,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:03:22,435 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:03:22,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i [2023-11-26 12:03:25,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:03:26,221 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:03:26,222 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i [2023-11-26 12:03:26,286 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/data/a6d0752d0/5645b889a9334b50a4956473b43b719a/FLAG01d099896 [2023-11-26 12:03:26,309 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/data/a6d0752d0/5645b889a9334b50a4956473b43b719a [2023-11-26 12:03:26,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:03:26,317 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:03:26,320 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:26,320 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:03:26,325 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:03:26,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:26" (1/1) ... [2023-11-26 12:03:26,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265564ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:26, skipping insertion in model container [2023-11-26 12:03:26,328 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:26" (1/1) ... [2023-11-26 12:03:26,442 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:03:26,813 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_7e00d4c4-4859-4506-8171-6fc89ad83594/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i[4492,4505] [2023-11-26 12:03:26,822 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_7e00d4c4-4859-4506-8171-6fc89ad83594/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i[4552,4565] [2023-11-26 12:03:27,861 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:27,862 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:27,863 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:27,864 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:27,865 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:27,883 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:27,884 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:27,886 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:27,887 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:28,372 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 12:03:28,374 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 12:03:28,375 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 12:03:28,377 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 12:03:28,379 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 12:03:28,380 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 12:03:28,381 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 12:03:28,382 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 12:03:28,383 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 12:03:28,384 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 12:03:28,777 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:28,778 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:28,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:28,942 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:03:28,956 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_7e00d4c4-4859-4506-8171-6fc89ad83594/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i[4492,4505] [2023-11-26 12:03:28,957 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_7e00d4c4-4859-4506-8171-6fc89ad83594/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i[4552,4565] [2023-11-26 12:03:29,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,007 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,008 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,009 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,020 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,020 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,021 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,022 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,080 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 12:03:29,081 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 12:03:29,082 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 12:03:29,083 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 12:03:29,087 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 12:03:29,089 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 12:03:29,089 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 12:03:29,090 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 12:03:29,090 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 12:03:29,091 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 12:03:29,261 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8277] [2023-11-26 12:03:29,263 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,264 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 12:03:29,281 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8763-8774] [2023-11-26 12:03:29,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:29,621 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,621 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,622 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,622 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,622 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,623 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,623 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,623 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,623 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,624 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,624 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,625 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,625 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,625 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,626 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,626 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,626 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,627 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:29,635 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:03:29,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29 WrapperNode [2023-11-26 12:03:29,636 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:29,638 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:29,638 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:03:29,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:03:29,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:29,769 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:29,858 INFO L138 Inliner]: procedures = 690, calls = 2618, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 803 [2023-11-26 12:03:29,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:29,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:03:29,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:03:29,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:03:29,872 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:29,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:29,884 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:29,993 INFO L175 MemorySlicer]: Split 516 memory accesses to 7 slices as follows [2, 5, 256, 236, 6, 8, 3]. 50 percent of accesses are in the largest equivalence class. The 502 initializations are split as follows [2, 5, 256, 236, 0, 0, 3]. The 2 writes are split as follows [0, 0, 0, 0, 2, 0, 0]. [2023-11-26 12:03:29,994 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:29,995 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:30,041 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:30,064 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:30,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:30,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:30,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:03:30,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:03:30,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:03:30,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:03:30,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (1/1) ... [2023-11-26 12:03:30,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:30,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:30,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:03:30,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:03:30,182 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2023-11-26 12:03:30,183 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2023-11-26 12:03:30,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:03:30,184 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-26 12:03:30,184 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-26 12:03:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:03:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:03:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:03:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:03:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 12:03:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 12:03:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 12:03:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 12:03:30,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 12:03:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:03:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:03:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-11-26 12:03:30,188 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-11-26 12:03:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:03:30,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:03:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-26 12:03:30,189 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-26 12:03:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-26 12:03:30,189 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-26 12:03:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-26 12:03:30,190 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-26 12:03:30,190 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:03:30,190 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:03:30,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:03:30,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 12:03:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 12:03:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 12:03:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-26 12:03:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-26 12:03:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-26 12:03:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2023-11-26 12:03:30,192 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-26 12:03:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-26 12:03:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:03:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:03:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:03:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:03:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 12:03:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 12:03:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 12:03:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:03:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:03:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:03:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:03:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 12:03:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 12:03:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 12:03:30,540 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:03:30,543 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:03:31,759 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:03:31,964 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:03:31,965 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:03:31,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:31 BoogieIcfgContainer [2023-11-26 12:03:31,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:03:31,970 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:03:31,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:03:31,975 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:03:31,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:03:26" (1/3) ... [2023-11-26 12:03:31,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a88fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:31, skipping insertion in model container [2023-11-26 12:03:31,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:29" (2/3) ... [2023-11-26 12:03:31,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a88fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:31, skipping insertion in model container [2023-11-26 12:03:31,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:31" (3/3) ... [2023-11-26 12:03:31,980 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_eq_c_str_harness-1.i [2023-11-26 12:03:32,002 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:03:32,002 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:03:32,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:03:32,081 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;@1d2c3fb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:03:32,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:03:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 51 states have internal predecessors, (64), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 12:03:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 12:03:32,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:32,105 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:32,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:32,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:32,114 INFO L85 PathProgramCache]: Analyzing trace with hash -288302132, now seen corresponding path program 1 times [2023-11-26 12:03:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626428873] [2023-11-26 12:03:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:32,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 12:03:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:03:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 12:03:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-26 12:03:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 12:03:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-26 12:03:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:32,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:33,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-26 12:03:33,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:33,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626428873] [2023-11-26 12:03:33,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626428873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:33,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:33,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:03:33,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31719067] [2023-11-26 12:03:33,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:33,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:33,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:33,087 INFO L87 Difference]: Start difference. First operand has 85 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 51 states have internal predecessors, (64), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-26 12:03:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:33,505 INFO L93 Difference]: Finished difference Result 172 states and 256 transitions. [2023-11-26 12:03:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:03:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 63 [2023-11-26 12:03:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:33,518 INFO L225 Difference]: With dead ends: 172 [2023-11-26 12:03:33,518 INFO L226 Difference]: Without dead ends: 87 [2023-11-26 12:03:33,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:03:33,526 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 73 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:33,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 100 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:03:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-26 12:03:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-26 12:03:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 49 states have internal predecessors, (59), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-26 12:03:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2023-11-26 12:03:33,578 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 63 [2023-11-26 12:03:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:33,579 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2023-11-26 12:03:33,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-26 12:03:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2023-11-26 12:03:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 12:03:33,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:33,584 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:33,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:03:33,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:33,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:33,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1325277948, now seen corresponding path program 1 times [2023-11-26 12:03:33,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:33,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113692484] [2023-11-26 12:03:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:33,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:36,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:36,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:36,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 12:03:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:36,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:03:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 12:03:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-26 12:03:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 12:03:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-26 12:03:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:37,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:37,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 12:03:37,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113692484] [2023-11-26 12:03:37,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113692484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321208681] [2023-11-26 12:03:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:37,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:37,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:37,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:03:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:37,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 2442 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 12:03:37,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 12:03:38,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:38,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321208681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:38,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:03:38,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 19 [2023-11-26 12:03:38,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259466817] [2023-11-26 12:03:38,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:38,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:03:38,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:03:38,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:03:38,025 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-26 12:03:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:38,284 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2023-11-26 12:03:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:03:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 63 [2023-11-26 12:03:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:38,288 INFO L225 Difference]: With dead ends: 134 [2023-11-26 12:03:38,288 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 12:03:38,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-11-26 12:03:38,291 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 2 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:38,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 419 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:03:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 12:03:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-26 12:03:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-26 12:03:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2023-11-26 12:03:38,306 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 63 [2023-11-26 12:03:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:38,306 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2023-11-26 12:03:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-26 12:03:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2023-11-26 12:03:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-26 12:03:38,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:38,314 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 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] [2023-11-26 12:03:38,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 12:03:38,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:38,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:38,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1321452724, now seen corresponding path program 1 times [2023-11-26 12:03:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:38,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474062769] [2023-11-26 12:03:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:38,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 12:03:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 12:03:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-26 12:03:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-26 12:03:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 12:03:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-26 12:03:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-26 12:03:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-26 12:03:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-26 12:03:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-26 12:03:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:41,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:41,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-26 12:03:41,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:41,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474062769] [2023-11-26 12:03:41,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474062769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:41,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105917815] [2023-11-26 12:03:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:41,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:41,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:41,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:03:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:41,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 2520 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-26 12:03:41,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-26 12:03:43,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-26 12:03:44,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105917815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:44,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:44,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 21] total 52 [2023-11-26 12:03:44,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070892325] [2023-11-26 12:03:44,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:44,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-26 12:03:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-26 12:03:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2467, Unknown=0, NotChecked=0, Total=2652 [2023-11-26 12:03:44,826 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 52 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 21 states have call successors, (49), 7 states have call predecessors, (49), 11 states have return successors, (46), 24 states have call predecessors, (46), 19 states have call successors, (46) [2023-11-26 12:03:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:48,499 INFO L93 Difference]: Finished difference Result 173 states and 240 transitions. [2023-11-26 12:03:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-26 12:03:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 21 states have call successors, (49), 7 states have call predecessors, (49), 11 states have return successors, (46), 24 states have call predecessors, (46), 19 states have call successors, (46) Word has length 88 [2023-11-26 12:03:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:48,509 INFO L225 Difference]: With dead ends: 173 [2023-11-26 12:03:48,509 INFO L226 Difference]: Without dead ends: 127 [2023-11-26 12:03:48,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=451, Invalid=5249, Unknown=0, NotChecked=0, Total=5700 [2023-11-26 12:03:48,517 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 332 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 3036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:48,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 788 Invalid, 3036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-26 12:03:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-26 12:03:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2023-11-26 12:03:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 70 states have internal predecessors, (80), 38 states have call successors, (38), 10 states have call predecessors, (38), 13 states have return successors, (42), 38 states have call predecessors, (42), 37 states have call successors, (42) [2023-11-26 12:03:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2023-11-26 12:03:48,552 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 88 [2023-11-26 12:03:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:48,553 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2023-11-26 12:03:48,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 21 states have call successors, (49), 7 states have call predecessors, (49), 11 states have return successors, (46), 24 states have call predecessors, (46), 19 states have call successors, (46) [2023-11-26 12:03:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2023-11-26 12:03:48,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-26 12:03:48,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:48,557 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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] [2023-11-26 12:03:48,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:48,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:48,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:48,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:48,768 INFO L85 PathProgramCache]: Analyzing trace with hash -170173077, now seen corresponding path program 1 times [2023-11-26 12:03:48,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:48,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744303437] [2023-11-26 12:03:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:48,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 12:03:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 12:03:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-26 12:03:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-26 12:03:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 12:03:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-26 12:03:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-26 12:03:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:03:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-26 12:03:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-26 12:03:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-26 12:03:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-26 12:03:49,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744303437] [2023-11-26 12:03:49,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744303437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:49,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:49,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:03:49,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459909088] [2023-11-26 12:03:49,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:49,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:03:49,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:03:49,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:03:49,712 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 12:03:50,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:50,152 INFO L93 Difference]: Finished difference Result 158 states and 211 transitions. [2023-11-26 12:03:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:03:50,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 94 [2023-11-26 12:03:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:50,157 INFO L225 Difference]: With dead ends: 158 [2023-11-26 12:03:50,157 INFO L226 Difference]: Without dead ends: 122 [2023-11-26 12:03:50,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:03:50,159 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 73 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:50,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 163 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:03:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-26 12:03:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-26 12:03:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 72 states have internal predecessors, (83), 38 states have call successors, (38), 10 states have call predecessors, (38), 14 states have return successors, (44), 40 states have call predecessors, (44), 37 states have call successors, (44) [2023-11-26 12:03:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2023-11-26 12:03:50,196 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 94 [2023-11-26 12:03:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:50,196 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2023-11-26 12:03:50,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-26 12:03:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2023-11-26 12:03:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-26 12:03:50,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:50,211 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:50,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:03:50,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:50,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1804871175, now seen corresponding path program 1 times [2023-11-26 12:03:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:50,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819637629] [2023-11-26 12:03:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:50,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:51,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:51,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:03:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 12:03:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 12:03:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 12:03:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 12:03:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-26 12:03:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-26 12:03:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-26 12:03:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-26 12:03:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-26 12:03:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-26 12:03:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:03:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:03:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-26 12:03:52,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:52,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819637629] [2023-11-26 12:03:52,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819637629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:52,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594909164] [2023-11-26 12:03:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:52,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:52,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:03:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:53,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 2554 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-26 12:03:53,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-26 12:03:54,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-11-26 12:03:56,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594909164] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:56,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:56,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [18, 25] total 60 [2023-11-26 12:03:56,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973575491] [2023-11-26 12:03:56,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:56,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:03:56,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:56,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:03:56,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3284, Unknown=0, NotChecked=0, Total=3540 [2023-11-26 12:03:56,657 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand has 22 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2023-11-26 12:03:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:58,458 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2023-11-26 12:03:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 12:03:58,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) Word has length 98 [2023-11-26 12:03:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:58,462 INFO L225 Difference]: With dead ends: 185 [2023-11-26 12:03:58,462 INFO L226 Difference]: Without dead ends: 140 [2023-11-26 12:03:58,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=351, Invalid=4761, Unknown=0, NotChecked=0, Total=5112 [2023-11-26 12:03:58,466 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 161 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:58,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1110 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 12:03:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-26 12:03:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2023-11-26 12:03:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 70 states have (on average 1.2) internal successors, (84), 73 states have internal predecessors, (84), 42 states have call successors, (42), 10 states have call predecessors, (42), 14 states have return successors, (50), 44 states have call predecessors, (50), 41 states have call successors, (50) [2023-11-26 12:03:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 176 transitions. [2023-11-26 12:03:58,508 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 176 transitions. Word has length 98 [2023-11-26 12:03:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:58,512 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 176 transitions. [2023-11-26 12:03:58,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2023-11-26 12:03:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 176 transitions. [2023-11-26 12:03:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-26 12:03:58,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:58,516 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:58,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:58,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:58,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:58,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1217585287, now seen corresponding path program 1 times [2023-11-26 12:03:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:58,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080473891] [2023-11-26 12:03:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:58,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:04:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:04:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:04:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 12:04:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:04:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-26 12:04:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 12:04:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 12:04:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-26 12:04:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:04:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-26 12:04:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-26 12:04:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-26 12:04:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 12:04:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-26 12:04:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-26 12:04:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-26 12:04:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:01,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:04:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:01,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-26 12:04:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-11-26 12:04:01,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:01,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080473891] [2023-11-26 12:04:01,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080473891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:01,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503697483] [2023-11-26 12:04:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:01,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:01,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e00d4c4-4859-4506-8171-6fc89ad83594/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:04:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:02,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 12:04:02,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-26 12:04:03,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-11-26 12:04:04,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503697483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:04,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:04,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2023-11-26 12:04:04,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309817856] [2023-11-26 12:04:04,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:04,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-26 12:04:04,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:04,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-26 12:04:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2023-11-26 12:04:04,520 INFO L87 Difference]: Start difference. First operand 127 states and 176 transitions. Second operand has 41 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 33 states have internal predecessors, (80), 14 states have call successors, (46), 5 states have call predecessors, (46), 12 states have return successors, (44), 17 states have call predecessors, (44), 13 states have call successors, (44)