./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire --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 781bda6fed61385a8a2dfd24d0779b588b4e3a263a6bd1d451e7bf9a103d1f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:37,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:37,121 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:08:37,129 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:37,130 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:37,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:37,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:37,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:37,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:37,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:37,180 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:37,182 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:37,182 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:37,184 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:37,185 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:37,185 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:37,186 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:37,186 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:37,187 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:37,187 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:37,188 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:37,189 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:37,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:37,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:08:37,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:37,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:37,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:08:37,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:37,193 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:08:37,194 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:08:37,195 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:37,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:37,196 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:37,196 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:37,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:37,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:37,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:37,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:08:37,198 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:37,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:37,199 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:37,199 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:08:37,199 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:37,200 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:37,201 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_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781bda6fed61385a8a2dfd24d0779b588b4e3a263a6bd1d451e7bf9a103d1f1e [2023-11-23 21:08:37,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:37,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:37,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:37,568 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:37,569 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:37,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness_negated.i [2023-11-23 21:08:40,755 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:41,306 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:41,306 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness_negated.i [2023-11-23 21:08:41,350 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/data/101c8de52/915143822d8e441e8299f4b62e9615ac/FLAG361c20dca [2023-11-23 21:08:41,369 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/data/101c8de52/915143822d8e441e8299f4b62e9615ac [2023-11-23 21:08:41,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:41,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:41,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:41,383 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:41,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:41,391 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,392 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9e772c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:41, skipping insertion in model container [2023-11-23 21:08:41,392 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:41" (1/1) ... [2023-11-23 21:08:41,521 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:41,832 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_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness_negated.i[4499,4512] [2023-11-23 21:08:41,842 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_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness_negated.i[4559,4572] [2023-11-23 21:08:43,170 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,178 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,179 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,181 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,182 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,201 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,202 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,209 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,210 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:43,663 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:08:43,664 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:08:43,666 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:08:43,667 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:08:43,669 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:08:43,669 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:08:43,670 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:08:43,671 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:08:43,672 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:08:43,672 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:08:44,089 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,093 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:44,261 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:44,288 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_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness_negated.i[4499,4512] [2023-11-23 21:08:44,290 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_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness_negated.i[4559,4572] [2023-11-23 21:08:44,344 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,345 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,345 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,346 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,347 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,358 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,358 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,360 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,360 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,418 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:08:44,421 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:08:44,422 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:08:44,423 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:08:44,424 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:08:44,425 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:08:44,426 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:08:44,426 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:08:44,427 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:08:44,428 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:08:44,598 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8237] [2023-11-23 21:08:44,600 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,600 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:44,618 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8723-8734] [2023-11-23 21:08:44,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:44,993 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,993 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,994 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,994 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,995 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,995 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,995 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,996 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,996 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,997 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,997 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,997 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,998 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,998 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,999 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,999 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,999 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:44,999 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:45,007 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:45,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45 WrapperNode [2023-11-23 21:08:45,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:45,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:45,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:45,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:45,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,262 INFO L138 Inliner]: procedures = 690, calls = 2648, calls flagged for inlining = 61, calls inlined = 11, statements flattened = 1022 [2023-11-23 21:08:45,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:45,269 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:45,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:45,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:45,279 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,300 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,301 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,405 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:45,418 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:45,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:45,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:45,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (1/1) ... [2023-11-23 21:08:45,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:45,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:45,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:45,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:45,527 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_read [2023-11-23 21:08:45,527 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_read [2023-11-23 21:08:45,527 INFO L130 BoogieDeclarations]: Found specification of procedure htonl [2023-11-23 21:08:45,527 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hton64 [2023-11-23 21:08:45,528 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hton64 [2023-11-23 21:08:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2023-11-23 21:08:45,528 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2023-11-23 21:08:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:08:45,528 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 21:08:45,529 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 21:08:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-11-23 21:08:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:08:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:08:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure aws_ntoh64 [2023-11-23 21:08:45,529 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_ntoh64 [2023-11-23 21:08:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:08:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:08:45,530 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:08:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:08:45,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:08:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:08:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:08:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:45,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:08:45,532 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:08:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-23 21:08:45,532 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-23 21:08:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:08:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:08:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-23 21:08:45,532 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-23 21:08:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:08:45,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:08:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:08:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:08:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:08:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:08:45,534 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:08:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:08:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_big_endian [2023-11-23 21:08:45,534 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_big_endian [2023-11-23 21:08:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2023-11-23 21:08:45,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:08:45,880 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:45,883 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:47,588 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:48,119 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:48,120 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:08:48,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:48 BoogieIcfgContainer [2023-11-23 21:08:48,122 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:48,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:48,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:48,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:48,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:41" (1/3) ... [2023-11-23 21:08:48,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a88ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:48, skipping insertion in model container [2023-11-23 21:08:48,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:45" (2/3) ... [2023-11-23 21:08:48,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a88ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:48, skipping insertion in model container [2023-11-23 21:08:48,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:48" (3/3) ... [2023-11-23 21:08:48,132 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be64_harness_negated.i [2023-11-23 21:08:48,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:48,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:08:48,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:48,233 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;@645fac79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:48,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:08:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 70 states have internal predecessors, (82), 50 states have call successors, (50), 13 states have call predecessors, (50), 13 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-23 21:08:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-23 21:08:48,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:48,255 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:48,256 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:48,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2113072510, now seen corresponding path program 1 times [2023-11-23 21:08:48,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:48,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606409358] [2023-11-23 21:08:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:48,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-23 21:08:52,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606409358] [2023-11-23 21:08:52,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606409358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484177103] [2023-11-23 21:08:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:52,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:52,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:52,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:52,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:08:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:53,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 21:08:53,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-23 21:08:53,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:53,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484177103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:53,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:08:53,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 11 [2023-11-23 21:08:53,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785698123] [2023-11-23 21:08:53,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:53,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:08:53,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:08:53,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:08:53,747 INFO L87 Difference]: Start difference. First operand has 134 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 70 states have internal predecessors, (82), 50 states have call successors, (50), 13 states have call predecessors, (50), 13 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 7 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 21:08:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:55,059 INFO L93 Difference]: Finished difference Result 255 states and 365 transitions. [2023-11-23 21:08:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:08:55,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 90 [2023-11-23 21:08:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:55,077 INFO L225 Difference]: With dead ends: 255 [2023-11-23 21:08:55,077 INFO L226 Difference]: Without dead ends: 132 [2023-11-23 21:08:55,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:08:55,095 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 2 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:55,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 904 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:08:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-23 21:08:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-23 21:08:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 68 states have (on average 1.161764705882353) internal successors, (79), 69 states have internal predecessors, (79), 50 states have call successors, (50), 13 states have call predecessors, (50), 13 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-23 21:08:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 178 transitions. [2023-11-23 21:08:55,176 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 178 transitions. Word has length 90 [2023-11-23 21:08:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:55,177 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 178 transitions. [2023-11-23 21:08:55,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 21:08:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 178 transitions. [2023-11-23 21:08:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-23 21:08:55,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:55,182 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:55,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:08:55,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:08:55,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:55,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1761049593, now seen corresponding path program 1 times [2023-11-23 21:08:55,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:55,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96716383] [2023-11-23 21:08:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:55,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-23 21:08:57,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:57,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96716383] [2023-11-23 21:08:57,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96716383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:57,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:57,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:57,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698470058] [2023-11-23 21:08:57,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:57,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:57,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:57,883 INFO L87 Difference]: Start difference. First operand 132 states and 178 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 21:08:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:58,687 INFO L93 Difference]: Finished difference Result 233 states and 316 transitions. [2023-11-23 21:08:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:08:58,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 98 [2023-11-23 21:08:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:58,692 INFO L225 Difference]: With dead ends: 233 [2023-11-23 21:08:58,692 INFO L226 Difference]: Without dead ends: 135 [2023-11-23 21:08:58,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:58,695 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 4 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:58,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 469 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:08:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-23 21:08:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-23 21:08:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 50 states have call successors, (50), 13 states have call predecessors, (50), 14 states have return successors, (50), 49 states have call predecessors, (50), 49 states have call successors, (50) [2023-11-23 21:08:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 183 transitions. [2023-11-23 21:08:58,712 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 183 transitions. Word has length 98 [2023-11-23 21:08:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:58,713 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 183 transitions. [2023-11-23 21:08:58,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 21:08:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 183 transitions. [2023-11-23 21:08:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 21:08:58,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:58,716 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:58,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:08:58,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:58,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash -178264466, now seen corresponding path program 1 times [2023-11-23 21:08:58,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:58,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748538405] [2023-11-23 21:08:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:58,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-23 21:09:01,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748538405] [2023-11-23 21:09:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748538405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355206564] [2023-11-23 21:09:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:01,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:01,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:01,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:09:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:02,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:09:02,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-23 21:09:02,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-23 21:09:02,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355206564] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:02,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:09:02,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-11-23 21:09:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722699291] [2023-11-23 21:09:02,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:02,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:02,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:09:02,454 INFO L87 Difference]: Start difference. First operand 135 states and 183 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 21:09:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:03,090 INFO L93 Difference]: Finished difference Result 242 states and 333 transitions. [2023-11-23 21:09:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:03,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 99 [2023-11-23 21:09:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:03,094 INFO L225 Difference]: With dead ends: 242 [2023-11-23 21:09:03,094 INFO L226 Difference]: Without dead ends: 140 [2023-11-23 21:09:03,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:09:03,096 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 4 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:03,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 467 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:09:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-23 21:09:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2023-11-23 21:09:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 73 states have (on average 1.178082191780822) internal successors, (86), 74 states have internal predecessors, (86), 50 states have call successors, (50), 14 states have call predecessors, (50), 14 states have return successors, (50), 49 states have call predecessors, (50), 49 states have call successors, (50) [2023-11-23 21:09:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 186 transitions. [2023-11-23 21:09:03,124 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 186 transitions. Word has length 99 [2023-11-23 21:09:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:03,125 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 186 transitions. [2023-11-23 21:09:03,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-23 21:09:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 186 transitions. [2023-11-23 21:09:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 21:09:03,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:03,128 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:03,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:03,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:03,343 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:03,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:03,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1596362203, now seen corresponding path program 1 times [2023-11-23 21:09:03,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:03,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43779996] [2023-11-23 21:09:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:03,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-23 21:09:05,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43779996] [2023-11-23 21:09:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43779996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:05,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342986389] [2023-11-23 21:09:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:05,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:05,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:05,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:05,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1bb7b24-2289-49cb-92d5-42eaea0a87e1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:09:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:06,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:09:06,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-23 21:09:06,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-23 21:09:06,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342986389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:06,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168708517] [2023-11-23 21:09:06,960 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2023-11-23 21:09:06,961 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:06,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:06,973 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:06,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs