./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 618de5120235c3340e11b4958ef07a29ea7e443f67840fe760124caab804e862 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:45:11,130 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:45:11,264 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:45:11,270 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:45:11,272 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:45:11,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:45:11,308 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:45:11,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:45:11,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:45:11,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:45:11,317 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:45:11,317 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:45:11,318 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:45:11,320 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:45:11,320 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:45:11,321 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:45:11,321 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:45:11,322 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:45:11,323 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:45:11,325 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:45:11,326 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:45:11,326 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:45:11,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:45:11,329 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:45:11,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:45:11,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:45:11,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:45:11,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:45:11,331 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:45:11,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:45:11,334 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:45:11,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:45:11,335 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:45:11,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:11,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:45:11,336 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:45:11,336 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:45:11,336 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:45:11,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:45:11,337 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:45:11,338 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:45:11,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:45:11,339 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 618de5120235c3340e11b4958ef07a29ea7e443f67840fe760124caab804e862 [2023-11-12 00:45:11,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:45:11,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:45:11,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:45:11,775 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:45:11,776 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:45:11,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i [2023-11-12 00:45:14,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:45:15,649 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:45:15,651 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i [2023-11-12 00:45:15,714 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/data/e8df314cd/c7f07fd3e4314075a0cd8cdc2d7becca/FLAG8989fa7f4 [2023-11-12 00:45:15,734 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/data/e8df314cd/c7f07fd3e4314075a0cd8cdc2d7becca [2023-11-12 00:45:15,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:45:15,743 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:45:15,749 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:15,749 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:45:15,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:45:15,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:15" (1/1) ... [2023-11-12 00:45:15,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68f44141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:15, skipping insertion in model container [2023-11-12 00:45:15,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:15" (1/1) ... [2023-11-12 00:45:15,903 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:45:16,255 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_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i[4500,4513] [2023-11-12 00:45:16,265 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_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i[4560,4573] [2023-11-12 00:45:17,662 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:17,663 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:17,665 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:17,667 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:17,669 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:17,703 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:17,705 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:17,710 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:17,711 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:18,466 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:45:18,468 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:45:18,469 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:45:18,472 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:45:18,476 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:45:18,481 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:45:18,482 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:45:18,483 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:45:18,484 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:45:18,487 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:45:18,812 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:18,813 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:18,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:18,959 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:45:18,975 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_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i[4500,4513] [2023-11-12 00:45:18,975 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_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/sv-benchmarks/c/aws-c-common/aws_string_new_from_string_harness.i[4560,4573] [2023-11-12 00:45:19,016 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,017 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,017 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,018 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,019 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,026 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,027 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,028 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,029 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,065 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:45:19,066 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:45:19,067 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:45:19,068 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:45:19,069 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:45:19,070 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:45:19,070 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:45:19,071 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:45:19,071 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:45:19,072 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:45:19,221 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8269] [2023-11-12 00:45:19,222 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,223 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:45:19,238 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8755-8766] [2023-11-12 00:45:19,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:19,527 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,527 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,527 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,528 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,528 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,528 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,529 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,529 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,530 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,530 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,530 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,531 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,531 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,532 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,532 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,533 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,533 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,533 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:19,542 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:45:19,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19 WrapperNode [2023-11-12 00:45:19,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:19,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:19,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:45:19,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:45:19,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,694 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,802 INFO L138 Inliner]: procedures = 689, calls = 2743, calls flagged for inlining = 59, calls inlined = 9, statements flattened = 830 [2023-11-12 00:45:19,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:19,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:45:19,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:45:19,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:45:19,815 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,832 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,832 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,925 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,951 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,973 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:45:19,974 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:45:19,974 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:45:19,974 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:45:19,974 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (1/1) ... [2023-11-12 00:45:19,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:20,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:45:20,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:45:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-12 00:45:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-12 00:45:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:45:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:45:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:45:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-11-12 00:45:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-12 00:45:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-12 00:45:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-12 00:45:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:45:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:45:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-12 00:45:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-12 00:45:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:45:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:45:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:45:20,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:45:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:45:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:45:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:45:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:45:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:45:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:45:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:45:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-12 00:45:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:45:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-12 00:45:20,060 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-12 00:45:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:45:20,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:45:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2023-11-12 00:45:20,060 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2023-11-12 00:45:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:45:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 00:45:20,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 00:45:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:45:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:45:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_new_from_array [2023-11-12 00:45:20,061 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_new_from_array [2023-11-12 00:45:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:45:20,062 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:45:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 00:45:20,062 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 00:45:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:45:20,062 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:45:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:45:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2023-11-12 00:45:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_new_from_string [2023-11-12 00:45:20,063 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_new_from_string [2023-11-12 00:45:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:45:20,377 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:45:20,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:45:20,697 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume !true; [2023-11-12 00:45:22,162 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:45:22,406 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:45:22,406 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:45:22,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:22 BoogieIcfgContainer [2023-11-12 00:45:22,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:45:22,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:45:22,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:45:22,417 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:45:22,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:45:15" (1/3) ... [2023-11-12 00:45:22,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307aa0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:22, skipping insertion in model container [2023-11-12 00:45:22,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:19" (2/3) ... [2023-11-12 00:45:22,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307aa0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:22, skipping insertion in model container [2023-11-12 00:45:22,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:22" (3/3) ... [2023-11-12 00:45:22,422 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_new_from_string_harness.i [2023-11-12 00:45:22,442 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:45:22,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:45:22,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:22,534 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=FINITE_AUTOMATA, 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;@47915a40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:22,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:45:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 39 states have call successors, (39), 16 states have call predecessors, (39), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-12 00:45:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 00:45:22,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:22,556 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:22,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:22,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1637711367, now seen corresponding path program 1 times [2023-11-12 00:45:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:22,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050616216] [2023-11-12 00:45:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:22,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:45:24,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050616216] [2023-11-12 00:45:24,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050616216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:24,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:24,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:45:24,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515462630] [2023-11-12 00:45:24,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:24,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:45:24,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:45:24,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:24,965 INFO L87 Difference]: Start difference. First operand has 125 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 39 states have call successors, (39), 16 states have call predecessors, (39), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-12 00:45:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:25,427 INFO L93 Difference]: Finished difference Result 196 states and 275 transitions. [2023-11-12 00:45:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:45:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 60 [2023-11-12 00:45:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:25,449 INFO L225 Difference]: With dead ends: 196 [2023-11-12 00:45:25,450 INFO L226 Difference]: Without dead ends: 152 [2023-11-12 00:45:25,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:45:25,465 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 17 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:25,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 778 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:45:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-12 00:45:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 130. [2023-11-12 00:45:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 73 states have internal predecessors, (83), 42 states have call successors, (42), 16 states have call predecessors, (42), 17 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2023-11-12 00:45:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 167 transitions. [2023-11-12 00:45:25,562 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 167 transitions. Word has length 60 [2023-11-12 00:45:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:25,564 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 167 transitions. [2023-11-12 00:45:25,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-12 00:45:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 167 transitions. [2023-11-12 00:45:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 00:45:25,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:25,573 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:25,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:45:25,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:25,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:25,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1495619043, now seen corresponding path program 1 times [2023-11-12 00:45:25,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:25,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136555783] [2023-11-12 00:45:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:25,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:45:26,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:26,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136555783] [2023-11-12 00:45:26,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136555783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:26,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:26,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:45:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017598924] [2023-11-12 00:45:26,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:26,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:45:26,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:45:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:45:26,581 INFO L87 Difference]: Start difference. First operand 130 states and 167 transitions. Second operand has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-12 00:45:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:27,243 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2023-11-12 00:45:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:45:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2023-11-12 00:45:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:27,249 INFO L225 Difference]: With dead ends: 186 [2023-11-12 00:45:27,249 INFO L226 Difference]: Without dead ends: 150 [2023-11-12 00:45:27,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:45:27,252 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 157 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:27,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1031 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:45:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-12 00:45:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 126. [2023-11-12 00:45:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-12 00:45:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2023-11-12 00:45:27,291 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 64 [2023-11-12 00:45:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:27,291 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2023-11-12 00:45:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-12 00:45:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2023-11-12 00:45:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 00:45:27,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:27,301 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:27,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:45:27,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:27,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1970175776, now seen corresponding path program 1 times [2023-11-12 00:45:27,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:27,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075952341] [2023-11-12 00:45:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:27,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:45:27,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:27,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075952341] [2023-11-12 00:45:27,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075952341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:27,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:27,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:45:27,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166369612] [2023-11-12 00:45:27,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:27,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:45:27,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:45:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:45:27,791 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-12 00:45:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:27,962 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2023-11-12 00:45:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:45:27,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) Word has length 64 [2023-11-12 00:45:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:27,968 INFO L225 Difference]: With dead ends: 168 [2023-11-12 00:45:27,968 INFO L226 Difference]: Without dead ends: 130 [2023-11-12 00:45:27,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:45:27,974 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:27,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 552 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:45:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-12 00:45:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-11-12 00:45:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 41 states have call successors, (41), 16 states have call predecessors, (41), 17 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2023-11-12 00:45:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2023-11-12 00:45:28,018 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 64 [2023-11-12 00:45:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:28,019 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2023-11-12 00:45:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-12 00:45:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2023-11-12 00:45:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 00:45:28,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:28,022 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:45:28,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:28,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 747453033, now seen corresponding path program 1 times [2023-11-12 00:45:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:28,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499699272] [2023-11-12 00:45:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:28,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:45:28,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:28,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499699272] [2023-11-12 00:45:28,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499699272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:28,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:28,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:45:28,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30100714] [2023-11-12 00:45:28,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:28,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:45:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:28,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:45:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:28,856 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2023-11-12 00:45:29,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:29,060 INFO L93 Difference]: Finished difference Result 170 states and 214 transitions. [2023-11-12 00:45:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:45:29,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) Word has length 68 [2023-11-12 00:45:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:29,063 INFO L225 Difference]: With dead ends: 170 [2023-11-12 00:45:29,063 INFO L226 Difference]: Without dead ends: 138 [2023-11-12 00:45:29,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:45:29,065 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:29,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 827 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:45:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-12 00:45:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-11-12 00:45:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 77 states have internal predecessors, (88), 41 states have call successors, (41), 16 states have call predecessors, (41), 19 states have return successors, (42), 42 states have call predecessors, (42), 39 states have call successors, (42) [2023-11-12 00:45:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2023-11-12 00:45:29,095 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 68 [2023-11-12 00:45:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:29,098 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2023-11-12 00:45:29,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2023-11-12 00:45:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2023-11-12 00:45:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 00:45:29,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:29,100 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:29,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:45:29,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:29,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 754398359, now seen corresponding path program 1 times [2023-11-12 00:45:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576588733] [2023-11-12 00:45:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:45:32,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576588733] [2023-11-12 00:45:32,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576588733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831704460] [2023-11-12 00:45:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:32,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:32,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:32,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:32,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a4f557e-a456-46ea-a6cf-f58aa1b34f3f/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:45:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:33,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-12 00:45:33,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:33,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-12 00:45:39,108 INFO L322 Elim1Store]: treesize reduction 168, result has 24.0 percent of original size [2023-11-12 00:45:39,109 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 228 treesize of output 188 [2023-11-12 00:45:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:45:39,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:53,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831704460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:53,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250067791] [2023-11-12 00:45:53,486 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2023-11-12 00:45:53,486 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:53,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:53,498 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:53,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs