./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_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_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/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_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/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_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/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 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:53:29,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:53:29,383 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:53:29,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:53:29,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:53:29,444 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:53:29,445 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:53:29,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:53:29,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:53:29,452 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:53:29,453 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:53:29,453 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:53:29,454 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:53:29,456 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:53:29,456 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:53:29,457 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:53:29,457 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:53:29,458 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:53:29,459 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:53:29,460 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:53:29,460 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:53:29,461 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:53:29,462 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:53:29,463 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:53:29,463 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:53:29,464 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:53:29,464 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:53:29,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:53:29,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:53:29,466 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:53:29,467 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:53:29,467 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:53:29,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:53:29,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:29,468 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:53:29,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:53:29,469 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:53:29,469 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:53:29,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:53:29,470 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:53:29,470 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:53:29,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:53:29,471 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_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce [2023-11-12 00:53:29,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:53:29,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:53:29,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:53:29,882 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:53:29,883 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:53:29,884 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2023-11-12 00:53:33,079 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:53:33,694 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:53:33,696 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2023-11-12 00:53:33,745 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/data/0ade0633f/51c79fea8a7146fcbf1b2a9624756904/FLAGc7b405c29 [2023-11-12 00:53:33,766 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/data/0ade0633f/51c79fea8a7146fcbf1b2a9624756904 [2023-11-12 00:53:33,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:53:33,775 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:53:33,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:53:33,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:53:33,787 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:53:33,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:53:33" (1/1) ... [2023-11-12 00:53:33,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c113e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:33, skipping insertion in model container [2023-11-12 00:53:33,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:53:33" (1/1) ... [2023-11-12 00:53:33,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:53:34,337 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_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2023-11-12 00:53:34,349 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_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2023-11-12 00:53:35,453 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:35,454 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:35,455 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:35,456 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:35,457 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:35,490 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:35,491 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:35,493 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:35,494 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,098 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:53:36,100 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:53:36,101 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:53:36,102 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:53:36,104 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:53:36,105 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:53:36,106 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:53:36,107 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:53:36,108 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:53:36,108 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:53:36,501 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,502 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:53:36,698 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:53:36,710 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_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2023-11-12 00:53:36,711 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_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2023-11-12 00:53:36,748 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,749 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,749 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,750 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,750 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,756 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,757 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,758 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,759 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:36,845 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:53:36,846 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:53:36,847 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:53:36,847 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:53:36,848 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:53:36,856 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:53:36,857 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:53:36,858 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:53:36,858 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:53:36,859 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:53:37,006 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8253] [2023-11-12 00:53:37,008 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:37,010 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:53:37,027 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8739-8750] [2023-11-12 00:53:37,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:53:37,306 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,307 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,307 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,307 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,307 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,307 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,308 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,308 WARN L672 CHandler]: The function s_global_handler is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,308 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,308 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,308 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,308 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,309 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,309 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,309 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,309 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,309 WARN L672 CHandler]: The function tl_thread_handler is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,309 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,310 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,310 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:37,318 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:53:37,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37 WrapperNode [2023-11-12 00:53:37,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:53:37,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:53:37,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:53:37,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:53:37,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,562 INFO L138 Inliner]: procedures = 692, calls = 2797, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 875 [2023-11-12 00:53:37,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:53:37,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:53:37,564 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:53:37,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:53:37,576 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,587 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,641 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:53:37,660 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:53:37,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:53:37,660 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:53:37,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (1/1) ... [2023-11-12 00:53:37,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:37,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:53:37,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:53:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-12 00:53:37,759 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-12 00:53:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-12 00:53:37,760 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-12 00:53:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-11-12 00:53:37,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-11-12 00:53:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-12 00:53:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:53:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:53:37,762 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:53:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:53:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:53:37,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:53:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:53:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:53:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:53:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:53:37,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:53:37,764 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:53:37,764 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:53:37,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:53:37,764 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:53:37,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:53:37,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:53:37,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:53:37,766 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2023-11-12 00:53:37,766 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2023-11-12 00:53:37,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:53:37,766 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:53:37,767 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:53:37,767 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:53:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:53:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:53:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:53:38,131 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:53:38,134 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:53:40,045 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:53:40,407 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:53:40,407 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:53:40,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:53:40 BoogieIcfgContainer [2023-11-12 00:53:40,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:53:40,416 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:53:40,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:53:40,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:53:40,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:53:33" (1/3) ... [2023-11-12 00:53:40,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80efaed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:53:40, skipping insertion in model container [2023-11-12 00:53:40,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:37" (2/3) ... [2023-11-12 00:53:40,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80efaed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:53:40, skipping insertion in model container [2023-11-12 00:53:40,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:53:40" (3/3) ... [2023-11-12 00:53:40,428 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_buf_harness.i [2023-11-12 00:53:40,450 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:53:40,450 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:53:40,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:53:40,526 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;@30203141, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:53:40,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:53:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-12 00:53:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:53:40,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:40,546 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:40,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:40,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1408255076, now seen corresponding path program 1 times [2023-11-12 00:53:40,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:40,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174648247] [2023-11-12 00:53:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:40,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:53:42,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174648247] [2023-11-12 00:53:42,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174648247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:42,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:42,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:53:42,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100964299] [2023-11-12 00:53:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:42,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:53:42,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:42,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:53:42,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:53:42,148 INFO L87 Difference]: Start difference. First operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:53:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:42,437 INFO L93 Difference]: Finished difference Result 160 states and 221 transitions. [2023-11-12 00:53:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:53:42,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 51 [2023-11-12 00:53:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:42,460 INFO L225 Difference]: With dead ends: 160 [2023-11-12 00:53:42,461 INFO L226 Difference]: Without dead ends: 125 [2023-11-12 00:53:42,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:53:42,476 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:42,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 320 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:53:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-12 00:53:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2023-11-12 00:53:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 70 states have internal predecessors, (84), 43 states have call successors, (43), 10 states have call predecessors, (43), 10 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-12 00:53:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2023-11-12 00:53:42,578 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 51 [2023-11-12 00:53:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:42,580 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2023-11-12 00:53:42,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:53:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2023-11-12 00:53:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:53:42,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:42,587 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:42,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:53:42,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:42,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash 868045347, now seen corresponding path program 1 times [2023-11-12 00:53:42,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:42,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468895248] [2023-11-12 00:53:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:42,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 00:54:01,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:01,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468895248] [2023-11-12 00:54:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468895248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:01,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334879438] [2023-11-12 00:54:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:01,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:01,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:01,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:01,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0135-344f-4d3c-ad1a-2b9ab8ccf1c5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:54:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:02,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-12 00:54:02,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:02,352 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 15 treesize of output 1 [2023-11-12 00:54:11,777 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:54:11,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2023-11-12 00:54:11,834 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:54:11,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 37 [2023-11-12 00:54:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:54:11,983 INFO L327 TraceCheckSpWp]: Computing backward predicates...