./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx --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 b64b813c3d856efe8cd859d380d09d4b682c371a0a165a5a5fe0d11dc206dad7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:22:56,694 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:22:56,807 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-21 22:22:56,817 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:22:56,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:22:56,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:22:56,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:22:56,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:22:56,872 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:22:56,873 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:22:56,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:22:56,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:22:56,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:22:56,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:22:56,876 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:22:56,877 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:22:56,877 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:22:56,878 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:22:56,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:22:56,879 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:22:56,880 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:22:56,880 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:22:56,881 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:22:56,881 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:22:56,882 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:22:56,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:22:56,883 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:22:56,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:22:56,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:56,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:22:56,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:22:56,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:22:56,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:22:56,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:22:56,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:22:56,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:22:56,907 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:22:56,908 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:22:56,908 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:22:56,908 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_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b64b813c3d856efe8cd859d380d09d4b682c371a0a165a5a5fe0d11dc206dad7 [2023-11-21 22:22:57,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:22:57,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:22:57,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:22:57,299 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:22:57,300 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:22:57,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i [2023-11-21 22:23:00,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:23:01,067 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:23:01,068 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i [2023-11-21 22:23:01,112 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/data/8430837bc/05070111e2594cadbf538344097b8b12/FLAG5ebc4d570 [2023-11-21 22:23:01,129 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/data/8430837bc/05070111e2594cadbf538344097b8b12 [2023-11-21 22:23:01,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:23:01,140 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:23:01,142 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:23:01,142 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:23:01,148 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:23:01,149 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac70612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:01, skipping insertion in model container [2023-11-21 22:23:01,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:23:01" (1/1) ... [2023-11-21 22:23:01,277 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:23:01,590 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_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4493,4506] [2023-11-21 22:23:01,599 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_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4553,4566] [2023-11-21 22:23:02,748 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:02,749 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:02,750 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:02,751 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:02,752 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:02,771 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:02,772 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:02,775 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:02,776 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:03,368 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 22:23:03,371 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 22:23:03,373 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 22:23:03,378 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 22:23:03,381 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 22:23:03,381 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 22:23:03,382 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 22:23:03,385 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 22:23:03,387 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 22:23:03,389 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 22:23:03,771 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:03,772 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:03,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:23:03,893 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:23:03,918 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_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4493,4506] [2023-11-21 22:23:03,919 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_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4553,4566] [2023-11-21 22:23:03,987 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:03,988 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:03,988 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:03,988 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:03,989 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:04,003 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:04,004 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:04,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:04,008 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:04,053 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 22:23:04,054 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 22:23:04,062 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 22:23:04,063 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 22:23:04,065 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 22:23:04,066 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 22:23:04,066 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 22:23:04,067 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 22:23:04,067 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 22:23:04,068 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 22:23:04,182 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8588] [2023-11-21 22:23:04,184 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:04,184 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 22:23:04,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:23:04,433 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,433 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,433 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,433 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,433 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,434 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,434 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,434 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,434 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,434 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,434 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,435 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,435 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,435 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,435 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,435 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,435 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:23:04,445 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:23:04,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04 WrapperNode [2023-11-21 22:23:04,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:23:04,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:23:04,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:23:04,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:23:04,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,674 INFO L138 Inliner]: procedures = 680, calls = 2274, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 390 [2023-11-21 22:23:04,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:23:04,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:23:04,675 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:23:04,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:23:04,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,699 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,730 INFO L187 HeapSplitter]: Split 278 memory accesses to 4 slices as follows [2, 256, 5, 15] [2023-11-21 22:23:04,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,761 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:23:04,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:23:04,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:23:04,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:23:04,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (1/1) ... [2023-11-21 22:23:04,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:23:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:04,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:23:04,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:23:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2023-11-21 22:23:04,869 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2023-11-21 22:23:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-21 22:23:04,869 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-21 22:23:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-11-21 22:23:04,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-11-21 22:23:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-21 22:23:04,870 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-21 22:23:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:23:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:23:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-21 22:23:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-21 22:23:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 22:23:04,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 22:23:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:23:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:23:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-21 22:23:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-21 22:23:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-21 22:23:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-21 22:23:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:23:04,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:23:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-21 22:23:04,872 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-21 22:23:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 22:23:04,873 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 22:23:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-21 22:23:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-21 22:23:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-21 22:23:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-21 22:23:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-21 22:23:04,873 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-21 22:23:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-21 22:23:04,874 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-21 22:23:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:23:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:23:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-21 22:23:04,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-21 22:23:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:23:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:23:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 22:23:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-21 22:23:05,122 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:23:05,125 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:23:05,791 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:23:05,958 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:23:05,958 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:23:05,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:05 BoogieIcfgContainer [2023-11-21 22:23:05,961 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:23:05,964 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:23:05,964 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:23:05,967 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:23:05,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:23:01" (1/3) ... [2023-11-21 22:23:05,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b925b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:23:05, skipping insertion in model container [2023-11-21 22:23:05,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:04" (2/3) ... [2023-11-21 22:23:05,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b925b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:23:05, skipping insertion in model container [2023-11-21 22:23:05,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:05" (3/3) ... [2023-11-21 22:23:05,973 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_c_str_harness.i [2023-11-21 22:23:05,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:23:05,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:23:06,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:23:06,067 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;@5c952315, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:23:06,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:23:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 50 states have (on average 1.26) internal successors, (63), 51 states have internal predecessors, (63), 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) [2023-11-21 22:23:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:23:06,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:06,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:23:06,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:06,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:06,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1931822635, now seen corresponding path program 1 times [2023-11-21 22:23:06,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:06,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119050749] [2023-11-21 22:23:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:06,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-21 22:23:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-21 22:23:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:23:07,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:07,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119050749] [2023-11-21 22:23:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119050749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:07,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:07,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:23:07,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764625895] [2023-11-21 22:23:07,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:07,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:23:07,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:23:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:23:07,124 INFO L87 Difference]: Start difference. First operand has 87 states, 50 states have (on average 1.26) internal successors, (63), 51 states have internal predecessors, (63), 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 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:23:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:07,314 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2023-11-21 22:23:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:23:07,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-11-21 22:23:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:07,326 INFO L225 Difference]: With dead ends: 130 [2023-11-21 22:23:07,327 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 22:23:07,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:23:07,334 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:07,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 294 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:23:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 22:23:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 22:23:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 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) [2023-11-21 22:23:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2023-11-21 22:23:07,386 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 26 [2023-11-21 22:23:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:07,388 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2023-11-21 22:23:07,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:23:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2023-11-21 22:23:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 22:23:07,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:07,392 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:07,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:23:07,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:07,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1669080101, now seen corresponding path program 1 times [2023-11-21 22:23:07,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:07,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766363529] [2023-11-21 22:23:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:23:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:23:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:23:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 22:23:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:07,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:23:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-21 22:23:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 22:23:08,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766363529] [2023-11-21 22:23:08,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766363529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:08,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:08,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 22:23:08,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291681179] [2023-11-21 22:23:08,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:08,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:23:08,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:23:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:08,032 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-21 22:23:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:08,512 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2023-11-21 22:23:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:23:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 45 [2023-11-21 22:23:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:08,516 INFO L225 Difference]: With dead ends: 111 [2023-11-21 22:23:08,516 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 22:23:08,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:08,518 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 31 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:08,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 350 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:23:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 22:23:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 22:23:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 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) [2023-11-21 22:23:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2023-11-21 22:23:08,535 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 45 [2023-11-21 22:23:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:08,535 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2023-11-21 22:23:08,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-21 22:23:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2023-11-21 22:23:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 22:23:08,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:08,542 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:08,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:23:08,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:08,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1706204541, now seen corresponding path program 1 times [2023-11-21 22:23:08,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:08,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319641950] [2023-11-21 22:23:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-21 22:23:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:23:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:23:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-21 22:23:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:23:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 22:23:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 22:23:09,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:09,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319641950] [2023-11-21 22:23:09,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319641950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:09,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:09,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:23:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295541230] [2023-11-21 22:23:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:09,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:23:09,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:23:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:23:09,019 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:23:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:09,339 INFO L93 Difference]: Finished difference Result 131 states and 167 transitions. [2023-11-21 22:23:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:23:09,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2023-11-21 22:23:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:09,342 INFO L225 Difference]: With dead ends: 131 [2023-11-21 22:23:09,342 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 22:23:09,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:23:09,345 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 29 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:09,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 207 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:23:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 22:23:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 22:23:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 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) [2023-11-21 22:23:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-11-21 22:23:09,361 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 46 [2023-11-21 22:23:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:09,361 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-11-21 22:23:09,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:23:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-11-21 22:23:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 22:23:09,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:09,366 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:09,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:23:09,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:09,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:09,367 INFO L85 PathProgramCache]: Analyzing trace with hash -529008396, now seen corresponding path program 1 times [2023-11-21 22:23:09,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:09,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556577087] [2023-11-21 22:23:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:09,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:23:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:23:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:23:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:23:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:23:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:23:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 22:23:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:23:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:23:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:23:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-21 22:23:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-21 22:23:10,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:10,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556577087] [2023-11-21 22:23:10,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556577087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:23:10,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042642895] [2023-11-21 22:23:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:10,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:10,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:10,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:10,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:23:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:11,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 22:23:11,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-21 22:23:11,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:23:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-21 22:23:11,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042642895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:23:11,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:23:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 14 [2023-11-21 22:23:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653403559] [2023-11-21 22:23:11,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:23:11,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:23:11,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:23:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:23:11,400 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 14 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-21 22:23:11,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:11,995 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2023-11-21 22:23:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:23:11,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 71 [2023-11-21 22:23:11,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:11,998 INFO L225 Difference]: With dead ends: 117 [2023-11-21 22:23:11,998 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 22:23:11,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:23:12,000 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 71 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:12,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 447 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:23:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 22:23:12,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 22:23:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.127659574468085) internal successors, (53), 48 states have internal predecessors, (53), 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) [2023-11-21 22:23:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2023-11-21 22:23:12,027 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 71 [2023-11-21 22:23:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:12,028 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2023-11-21 22:23:12,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-21 22:23:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2023-11-21 22:23:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-21 22:23:12,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:12,038 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:12,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:23:12,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:12,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:12,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2105232865, now seen corresponding path program 1 times [2023-11-21 22:23:12,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:12,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688712178] [2023-11-21 22:23:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:12,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:23:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:23:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:23:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:23:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:23:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:23:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 22:23:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:23:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:23:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:23:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-21 22:23:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-21 22:23:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-21 22:23:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:13,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688712178] [2023-11-21 22:23:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688712178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:13,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:23:13,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-21 22:23:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874895472] [2023-11-21 22:23:13,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:23:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:23:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:23:13,731 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-21 22:23:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:14,420 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2023-11-21 22:23:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 22:23:14,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 6 states have call successors, (15) Word has length 75 [2023-11-21 22:23:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:14,423 INFO L225 Difference]: With dead ends: 111 [2023-11-21 22:23:14,423 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 22:23:14,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:23:14,425 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 66 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:14,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 466 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:23:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 22:23:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 22:23:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 48 states have internal predecessors, (52), 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) [2023-11-21 22:23:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2023-11-21 22:23:14,454 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 75 [2023-11-21 22:23:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:14,455 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2023-11-21 22:23:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 9 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-21 22:23:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2023-11-21 22:23:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 22:23:14,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:14,457 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:23:14,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:23:14,458 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:14,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash -835902961, now seen corresponding path program 1 times [2023-11-21 22:23:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:14,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025136102] [2023-11-21 22:23:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:14,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:21,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:21,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:23:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:23:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:23:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:23:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:23:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:23:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 22:23:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:23:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:23:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:23:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-21 22:23:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-21 22:23:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:23:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:23:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:22,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-21 22:23:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-21 22:23:23,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025136102] [2023-11-21 22:23:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025136102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:23:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746312062] [2023-11-21 22:23:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:23,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:23,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:23,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:23,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ad6c2c-48c0-4ac2-8ae4-5fa9c0c60d45/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:23:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:23,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-21 22:23:23,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:23,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 43 [2023-11-21 22:23:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:23:23,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-11-21 22:23:24,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 22:23:24,029 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-21 22:23:24,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2023-11-21 22:23:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 22:23:39,114 INFO L327 TraceCheckSpWp]: Computing backward predicates...