./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh --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 bb0c309b27b585749f4baad3e5a2aa617acc042d97a0a5f067f810d997d3b9d7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:22:26,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:22:26,589 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:22:26,593 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:22:26,594 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:22:26,618 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:22:26,618 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:22:26,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:22:26,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:22:26,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:22:26,621 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:22:26,621 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:22:26,622 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:22:26,622 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:22:26,623 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:22:26,623 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:22:26,624 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:22:26,624 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:22:26,625 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:22:26,625 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:22:26,626 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:22:26,627 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:22:26,627 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:22:26,628 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:22:26,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:22:26,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:22:26,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:22:26,630 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:22:26,630 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:22:26,631 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:22:26,631 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:22:26,631 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:22:26,632 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:22:26,632 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:22:26,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:22:26,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:22:26,633 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:22:26,633 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:22:26,633 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:22:26,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:22:26,633 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:22:26,634 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:22:26,634 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:22:26,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:22:26,634 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_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0c309b27b585749f4baad3e5a2aa617acc042d97a0a5f067f810d997d3b9d7 [2023-12-02 17:22:26,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:22:26,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:22:26,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:22:26,884 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:22:26,884 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:22:26,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i [2023-12-02 17:22:29,689 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:22:30,124 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:22:30,125 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i [2023-12-02 17:22:30,160 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/data/91ab067fb/db2d092ad76b4caba9ddacf0842e99ad/FLAG42fc47ca0 [2023-12-02 17:22:30,175 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/data/91ab067fb/db2d092ad76b4caba9ddacf0842e99ad [2023-12-02 17:22:30,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:22:30,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:22:30,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:22:30,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:22:30,186 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:22:30,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:22:30" (1/1) ... [2023-12-02 17:22:30,188 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d0ac95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:30, skipping insertion in model container [2023-12-02 17:22:30,188 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:22:30" (1/1) ... [2023-12-02 17:22:30,296 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:22:30,553 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_338c43d7-de13-4d36-817f-d012bb13a338/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i[4502,4515] [2023-12-02 17:22:30,562 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_338c43d7-de13-4d36-817f-d012bb13a338/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i[4562,4575] [2023-12-02 17:22:31,560 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,561 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,562 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,564 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,579 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,580 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,582 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,583 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:31,997 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 17:22:32,010 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 17:22:32,011 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 17:22:32,012 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 17:22:32,013 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 17:22:32,014 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 17:22:32,014 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 17:22:32,015 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 17:22:32,015 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 17:22:32,016 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 17:22:32,246 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,247 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:22:32,351 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:22:32,362 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_338c43d7-de13-4d36-817f-d012bb13a338/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i[4502,4515] [2023-12-02 17:22:32,363 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_338c43d7-de13-4d36-817f-d012bb13a338/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i[4562,4575] [2023-12-02 17:22:32,397 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,397 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,398 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,398 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,399 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,405 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,405 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,406 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,406 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,439 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 17:22:32,440 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 17:22:32,441 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 17:22:32,442 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 17:22:32,443 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 17:22:32,443 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 17:22:32,444 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 17:22:32,444 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 17:22:32,444 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 17:22:32,445 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 17:22:32,501 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8061] [2023-12-02 17:22:32,502 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,503 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 17:22:32,513 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8547-8558] [2023-12-02 17:22:32,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:22:32,826 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,826 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,826 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,826 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,826 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,827 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,827 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,827 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,827 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,827 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,827 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,828 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,828 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,828 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,828 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,828 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,828 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,829 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:22:32,835 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:22:32,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32 WrapperNode [2023-12-02 17:22:32,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:22:32,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:22:32,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:22:32,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:22:32,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:32,921 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,005 INFO L138 Inliner]: procedures = 690, calls = 2511, calls flagged for inlining = 56, calls inlined = 8, statements flattened = 823 [2023-12-02 17:22:33,006 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:22:33,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:22:33,007 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:22:33,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:22:33,017 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,024 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,025 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,066 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,079 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:22:33,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:22:33,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:22:33,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:22:33,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (1/1) ... [2023-12-02 17:22:33,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:22:33,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:33,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:22:33,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:22:33,171 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-12-02 17:22:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-12-02 17:22:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:22:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 17:22:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 17:22:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:22:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:22:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:22:33,172 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2023-12-02 17:22:33,173 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2023-12-02 17:22:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 17:22:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:22:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 17:22:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:22:33,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:22:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 17:22:33,173 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 17:22:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-12-02 17:22:33,173 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-12-02 17:22:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:22:33,174 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:22:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:22:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 17:22:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 17:22:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 17:22:33,174 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 17:22:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:22:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-12-02 17:22:33,175 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-12-02 17:22:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-12-02 17:22:33,175 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-12-02 17:22:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:22:33,420 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:22:33,423 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:22:34,219 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:22:34,542 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:22:34,542 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:22:34,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:22:34 BoogieIcfgContainer [2023-12-02 17:22:34,544 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:22:34,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:22:34,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:22:34,549 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:22:34,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:22:30" (1/3) ... [2023-12-02 17:22:34,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeeca51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:22:34, skipping insertion in model container [2023-12-02 17:22:34,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:22:32" (2/3) ... [2023-12-02 17:22:34,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeeca51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:22:34, skipping insertion in model container [2023-12-02 17:22:34,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:22:34" (3/3) ... [2023-12-02 17:22:34,552 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_clean_up_secure_harness_negated.i [2023-12-02 17:22:34,566 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:22:34,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:22:34,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:22:34,612 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;@6c9860d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:22:34,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:22:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-12-02 17:22:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 17:22:34,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:34,625 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:34,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:22:34,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1349747488, now seen corresponding path program 1 times [2023-12-02 17:22:34,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:34,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68495648] [2023-12-02 17:22:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:22:37,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:37,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68495648] [2023-12-02 17:22:37,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68495648] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:37,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:37,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 17:22:37,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410648679] [2023-12-02 17:22:37,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:37,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:22:37,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:22:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:22:37,275 INFO L87 Difference]: Start difference. First operand has 83 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:22:38,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:38,772 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2023-12-02 17:22:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:22:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 50 [2023-12-02 17:22:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:38,783 INFO L225 Difference]: With dead ends: 124 [2023-12-02 17:22:38,783 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 17:22:38,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:22:38,790 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 23 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:38,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 472 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 17:22:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 17:22:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 17:22:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-12-02 17:22:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2023-12-02 17:22:38,851 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 50 [2023-12-02 17:22:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:38,853 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2023-12-02 17:22:38,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:22:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2023-12-02 17:22:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 17:22:38,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:38,857 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:38,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:22:38,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:22:38,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2004394088, now seen corresponding path program 1 times [2023-12-02 17:22:38,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:38,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296082299] [2023-12-02 17:22:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:38,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 17:22:47,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:47,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296082299] [2023-12-02 17:22:47,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296082299] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:47,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421968736] [2023-12-02 17:22:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:47,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:47,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:47,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:47,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_338c43d7-de13-4d36-817f-d012bb13a338/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:22:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:47,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 2567 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-02 17:22:47,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:47,893 INFO L378 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 [2023-12-02 17:22:51,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:22:51,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-12-02 17:22:51,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 17:22:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:22:52,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:54,730 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 56951 disjunctions. This might take some time... [2023-12-02 17:26:39,267 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 56951 disjunctions.