./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 cf1a7837 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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/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 c4e8d47a47f19811d4fd0ca8cb17b6360c5e52ebc062972268cba6b6d5f830d3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:07:41,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:07:41,761 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:07:41,770 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:07:41,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:07:41,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:07:41,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:07:41,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:07:41,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:07:41,816 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:07:41,817 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:07:41,818 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:07:41,818 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:07:41,820 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:07:41,820 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:07:41,821 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:07:41,821 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:07:41,821 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:07:41,822 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:07:41,822 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:07:41,823 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:07:41,823 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:07:41,824 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:07:41,825 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:07:41,825 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:07:41,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:07:41,826 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:07:41,827 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:07:41,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:07:41,827 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:07:41,829 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:07:41,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:07:41,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:07:41,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:07:41,830 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:07:41,830 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:07:41,830 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:07:41,831 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:07:41,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:07:41,831 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:07:41,831 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:07:41,832 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:07:41,832 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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4e8d47a47f19811d4fd0ca8cb17b6360c5e52ebc062972268cba6b6d5f830d3 [2023-11-12 00:07:42,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:07:42,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:07:42,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:07:42,162 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:07:42,162 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:07:42,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i [2023-11-12 00:07:45,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:07:45,981 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:07:45,982 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i [2023-11-12 00:07:46,037 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/data/bf99383f0/cb18d36a2875426889b81bad432b992a/FLAG1d5977ad8 [2023-11-12 00:07:46,055 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/data/bf99383f0/cb18d36a2875426889b81bad432b992a [2023-11-12 00:07:46,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:07:46,061 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:07:46,063 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:07:46,063 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:07:46,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:07:46,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:07:46" (1/1) ... [2023-11-12 00:07:46,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4902f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:46, skipping insertion in model container [2023-11-12 00:07:46,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:07:46" (1/1) ... [2023-11-12 00:07:46,213 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:07:46,495 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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i[4502,4515] [2023-11-12 00:07:46,504 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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i[4562,4575] [2023-11-12 00:07:47,835 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:47,837 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:47,840 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:47,842 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:47,844 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:47,875 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:47,879 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:47,882 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:47,885 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:48,511 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:07:48,512 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:07:48,514 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:07:48,541 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:07:48,542 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:07:48,543 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:07:48,544 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:07:48,545 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:07:48,546 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:07:48,546 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:07:48,864 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:48,865 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:48,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:07:49,033 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:07:49,057 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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i[4502,4515] [2023-11-12 00:07:49,058 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_434ce80d-bd92-4f04-adb5-d98ee1fccc83/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness_negated.i[4562,4575] [2023-11-12 00:07:49,101 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,102 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,104 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,105 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,107 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,122 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,123 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,124 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,125 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,166 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:07:49,167 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:07:49,168 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:07:49,169 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:07:49,170 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:07:49,171 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:07:49,172 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:07:49,172 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:07:49,173 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:07:49,173 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:07:49,278 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8061] [2023-11-12 00:07:49,280 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,280 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:07:49,307 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8547-8558] [2023-11-12 00:07:49,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:07:49,667 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,667 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,667 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,667 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,668 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,668 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,669 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,669 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,670 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,670 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,670 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,671 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,671 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,671 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,672 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,674 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,674 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,674 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:07:49,682 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:07:49,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49 WrapperNode [2023-11-12 00:07:49,683 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:07:49,685 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:07:49,685 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:07:49,685 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:07:49,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:49,829 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:49,945 INFO L138 Inliner]: procedures = 690, calls = 2507, calls flagged for inlining = 56, calls inlined = 8, statements flattened = 815 [2023-11-12 00:07:49,945 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:07:49,946 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:07:49,946 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:07:49,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:07:49,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:49,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:49,967 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:49,968 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:50,027 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:50,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:50,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:50,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:50,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:07:50,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:07:50,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:07:50,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:07:50,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (1/1) ... [2023-11-12 00:07:50,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:07:50,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:07:50,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:07:50,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:07:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-12 00:07:50,169 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-12 00:07:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:07:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:07:50,170 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:07:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:07:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:07:50,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:07:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2023-11-12 00:07:50,171 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2023-11-12 00:07:50,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:07:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:07:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:07:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:07:50,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:07:50,173 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:07:50,174 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:07:50,174 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-12 00:07:50,174 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-12 00:07:50,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:07:50,174 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:07:50,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:07:50,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:07:50,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:07:50,175 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:07:50,175 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:07:50,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:07:50,175 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-12 00:07:50,176 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-12 00:07:50,176 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-12 00:07:50,176 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-12 00:07:50,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:07:50,505 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:07:50,507 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:07:52,284 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:07:52,942 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:07:52,942 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:07:52,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:07:52 BoogieIcfgContainer [2023-11-12 00:07:52,945 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:07:52,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:07:52,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:07:52,952 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:07:52,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:07:46" (1/3) ... [2023-11-12 00:07:52,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da987e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:07:52, skipping insertion in model container [2023-11-12 00:07:52,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:49" (2/3) ... [2023-11-12 00:07:52,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da987e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:07:52, skipping insertion in model container [2023-11-12 00:07:52,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:07:52" (3/3) ... [2023-11-12 00:07:52,957 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_clean_up_secure_harness_negated.i [2023-11-12 00:07:52,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:07:52,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:07:53,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:07:53,048 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;@72fc49ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:07:53,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:07:53,056 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) [2023-11-12 00:07:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:07:53,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:53,067 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] [2023-11-12 00:07:53,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:53,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1935360163, now seen corresponding path program 1 times [2023-11-12 00:07:53,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:53,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135364045] [2023-11-12 00:07:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:53,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:07:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:07:57,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:07:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135364045] [2023-11-12 00:07:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135364045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:07:57,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:07:57,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 00:07:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041230953] [2023-11-12 00:07:57,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:07:57,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:07:57,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:07:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:07:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:07:57,877 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) [2023-11-12 00:07:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:07:59,498 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2023-11-12 00:07:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:07:59,501 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 [2023-11-12 00:07:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:07:59,510 INFO L225 Difference]: With dead ends: 124 [2023-11-12 00:07:59,511 INFO L226 Difference]: Without dead ends: 81 [2023-11-12 00:07:59,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:07:59,518 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 23 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:07:59,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 472 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:07:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-12 00:07:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-12 00:07:59,576 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) [2023-11-12 00:07:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2023-11-12 00:07:59,586 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 50 [2023-11-12 00:07:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:07:59,588 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2023-11-12 00:07:59,589 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) [2023-11-12 00:07:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2023-11-12 00:07:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-12 00:07:59,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:59,595 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] [2023-11-12 00:07:59,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:07:59,595 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:59,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1507988501, now seen corresponding path program 1 times [2023-11-12 00:07:59,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:59,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525397432] [2023-11-12 00:07:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:59,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:08:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:08:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 00:08:08,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:08:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525397432] [2023-11-12 00:08:08,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525397432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:08:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563054423] [2023-11-12 00:08:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:08:08,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:08:08,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:08:08,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:08:08,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434ce80d-bd92-4f04-adb5-d98ee1fccc83/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:08:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:08:09,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-12 00:08:09,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:08:09,911 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 00:08:11,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-12 00:08:11,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-12 00:08:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:08:15,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:08:18,053 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 56951 disjunctions. This might take some time...