./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash df84751ae907cf8e2f81d69c2889b453b5ccdd1cae9e7b45e78c48443104a63e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:36:38,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:36:38,358 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 19:36:38,364 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:36:38,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:36:38,389 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:36:38,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:36:38,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:36:38,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:36:38,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:36:38,392 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:36:38,392 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:36:38,393 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:36:38,393 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:36:38,394 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:36:38,395 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:36:38,395 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:36:38,396 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:36:38,396 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:36:38,397 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:36:38,397 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:36:38,402 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:36:38,403 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:36:38,403 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:36:38,404 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:36:38,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:36:38,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:36:38,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:36:38,405 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:36:38,406 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:36:38,406 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:36:38,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:36:38,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:36:38,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:36:38,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:36:38,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:36:38,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:36:38,408 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:36:38,408 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:36:38,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:36:38,409 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:36:38,409 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:36:38,409 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:36:38,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:36:38,410 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_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df84751ae907cf8e2f81d69c2889b453b5ccdd1cae9e7b45e78c48443104a63e [2023-12-02 19:36:38,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:36:38,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:36:38,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:36:38,661 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:36:38,661 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:36:38,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness_negated.i [2023-12-02 19:36:41,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:36:41,869 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:36:41,870 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness_negated.i [2023-12-02 19:36:41,901 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/data/226c5691d/f8dbe1002a934fafb3ec88275b7d32c4/FLAG0067aa2cc [2023-12-02 19:36:41,915 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/data/226c5691d/f8dbe1002a934fafb3ec88275b7d32c4 [2023-12-02 19:36:41,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:36:41,919 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:36:41,920 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:36:41,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:36:41,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:36:41,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:36:41" (1/1) ... [2023-12-02 19:36:41,927 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a7879c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:41, skipping insertion in model container [2023-12-02 19:36:41,927 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:36:41" (1/1) ... [2023-12-02 19:36:42,033 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:36:42,261 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_b3c84acd-8275-428d-97e6-15deef26b919/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness_negated.i[4499,4512] [2023-12-02 19:36:42,268 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_b3c84acd-8275-428d-97e6-15deef26b919/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness_negated.i[4559,4572] [2023-12-02 19:36:43,004 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,004 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,005 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,007 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,023 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,024 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,026 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,027 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,442 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 19:36:43,443 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 19:36:43,444 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 19:36:43,445 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 19:36:43,447 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 19:36:43,447 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 19:36:43,448 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 19:36:43,449 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 19:36:43,449 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 19:36:43,450 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 19:36:43,703 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,703 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:36:43,864 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:36:43,878 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_b3c84acd-8275-428d-97e6-15deef26b919/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness_negated.i[4499,4512] [2023-12-02 19:36:43,879 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_b3c84acd-8275-428d-97e6-15deef26b919/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness_negated.i[4559,4572] [2023-12-02 19:36:43,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,913 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,920 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,921 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:43,950 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 19:36:43,951 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 19:36:43,952 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 19:36:43,952 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 19:36:43,953 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 19:36:43,953 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 19:36:43,954 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 19:36:43,954 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 19:36:43,955 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 19:36:43,955 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 19:36:44,019 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8237] [2023-12-02 19:36:44,021 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:44,021 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 19:36:44,033 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8723-8734] [2023-12-02 19:36:44,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:36:44,257 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,257 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,257 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,257 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,257 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,258 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,258 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,258 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,258 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,258 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,258 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,258 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,258 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,259 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,259 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,259 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,259 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,259 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:36:44,265 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:36:44,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44 WrapperNode [2023-12-02 19:36:44,265 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:36:44,266 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:36:44,266 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:36:44,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:36:44,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,348 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,422 INFO L138 Inliner]: procedures = 690, calls = 2648, calls flagged for inlining = 61, calls inlined = 11, statements flattened = 1022 [2023-12-02 19:36:44,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:36:44,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:36:44,423 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:36:44,423 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:36:44,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,498 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,511 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:36:44,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:36:44,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:36:44,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:36:44,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (1/1) ... [2023-12-02 19:36:44,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:36:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:44,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:36:44,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:36:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_read [2023-12-02 19:36:44,570 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_read [2023-12-02 19:36:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2023-12-02 19:36:44,570 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2023-12-02 19:36:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure ntohs [2023-12-02 19:36:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:36:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 19:36:44,571 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 19:36:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-12-02 19:36:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 19:36:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 19:36:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:36:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 19:36:44,571 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 19:36:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 19:36:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 19:36:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 19:36:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure aws_ntoh16 [2023-12-02 19:36:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_ntoh16 [2023-12-02 19:36:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:36:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 19:36:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:36:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:36:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 19:36:44,573 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 19:36:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-12-02 19:36:44,573 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-12-02 19:36:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 19:36:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 19:36:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-12-02 19:36:44,573 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-12-02 19:36:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 19:36:44,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 19:36:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:36:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 19:36:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 19:36:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 19:36:44,574 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 19:36:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:36:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2023-12-02 19:36:44,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:36:44,834 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:36:44,836 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:36:45,966 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:36:46,263 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:36:46,263 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 19:36:46,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:36:46 BoogieIcfgContainer [2023-12-02 19:36:46,265 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:36:46,268 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:36:46,268 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:36:46,271 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:36:46,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:36:41" (1/3) ... [2023-12-02 19:36:46,271 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a315e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:36:46, skipping insertion in model container [2023-12-02 19:36:46,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:44" (2/3) ... [2023-12-02 19:36:46,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a315e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:36:46, skipping insertion in model container [2023-12-02 19:36:46,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:36:46" (3/3) ... [2023-12-02 19:36:46,273 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be16_harness_negated.i [2023-12-02 19:36:46,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:36:46,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:36:46,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:36:46,339 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;@75e6d15a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:36:46,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:36:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-02 19:36:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 19:36:46,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:46,356 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] [2023-12-02 19:36:46,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:36:46,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash 87171955, now seen corresponding path program 1 times [2023-12-02 19:36:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:46,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348484076] [2023-12-02 19:36:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:46,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-02 19:36:48,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:48,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348484076] [2023-12-02 19:36:48,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348484076] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:48,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:48,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:36:48,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994911237] [2023-12-02 19:36:48,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:48,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:36:48,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:36:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:36:48,255 INFO L87 Difference]: Start difference. First operand has 126 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 19:36:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:48,876 INFO L93 Difference]: Finished difference Result 221 states and 323 transitions. [2023-12-02 19:36:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:36:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 82 [2023-12-02 19:36:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:48,887 INFO L225 Difference]: With dead ends: 221 [2023-12-02 19:36:48,888 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 19:36:48,891 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 [2023-12-02 19:36:48,894 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 4 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:48,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 457 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:36:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 19:36:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-12-02 19:36:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 68 states have internal predecessors, (80), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 19:36:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 176 transitions. [2023-12-02 19:36:48,945 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 176 transitions. Word has length 82 [2023-12-02 19:36:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:48,946 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 176 transitions. [2023-12-02 19:36:48,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 19:36:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 176 transitions. [2023-12-02 19:36:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 19:36:48,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:48,951 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] [2023-12-02 19:36:48,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:36:48,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:36:48,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash -638960678, now seen corresponding path program 1 times [2023-12-02 19:36:48,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:48,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163916533] [2023-12-02 19:36:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:48,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-02 19:36:50,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163916533] [2023-12-02 19:36:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163916533] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686414336] [2023-12-02 19:36:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:50,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:50,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:50,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:50,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:36:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:51,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 2898 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:36:51,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 19:36:51,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-02 19:36:51,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686414336] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:51,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 19:36:51,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-12-02 19:36:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574978026] [2023-12-02 19:36:51,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:51,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:36:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:51,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:36:51,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:36:51,507 INFO L87 Difference]: Start difference. First operand 127 states and 176 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 19:36:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:51,948 INFO L93 Difference]: Finished difference Result 226 states and 318 transitions. [2023-12-02 19:36:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:36:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 83 [2023-12-02 19:36:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:51,951 INFO L225 Difference]: With dead ends: 226 [2023-12-02 19:36:51,951 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 19:36:51,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:36:51,953 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 4 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:51,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 303 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:36:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 19:36:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2023-12-02 19:36:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 70 states have internal predecessors, (83), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 19:36:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2023-12-02 19:36:51,968 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 83 [2023-12-02 19:36:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:51,968 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2023-12-02 19:36:51,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 19:36:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2023-12-02 19:36:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 19:36:51,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:51,970 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] [2023-12-02 19:36:51,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:36:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:52,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:36:52,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2041009557, now seen corresponding path program 1 times [2023-12-02 19:36:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:52,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912438874] [2023-12-02 19:36:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-02 19:36:53,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:53,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912438874] [2023-12-02 19:36:53,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912438874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:53,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930897177] [2023-12-02 19:36:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:53,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:53,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:53,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:53,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:36:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:54,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 2921 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 19:36:54,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 19:36:54,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:36:54,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930897177] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:54,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:36:54,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2023-12-02 19:36:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404517761] [2023-12-02 19:36:54,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:54,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:36:54,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:36:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:36:54,594 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-12-02 19:36:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:55,806 INFO L93 Difference]: Finished difference Result 247 states and 343 transitions. [2023-12-02 19:36:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:36:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 84 [2023-12-02 19:36:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:55,809 INFO L225 Difference]: With dead ends: 247 [2023-12-02 19:36:55,809 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 19:36:55,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:36:55,812 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 2 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:55,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1018 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 19:36:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 19:36:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-12-02 19:36:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 70 states have internal predecessors, (82), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 19:36:55,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 178 transitions. [2023-12-02 19:36:55,830 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 178 transitions. Word has length 84 [2023-12-02 19:36:55,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:55,831 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 178 transitions. [2023-12-02 19:36:55,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-12-02 19:36:55,831 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 178 transitions. [2023-12-02 19:36:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 19:36:55,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:55,833 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] [2023-12-02 19:36:55,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:36:56,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:56,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:36:56,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash -385404948, now seen corresponding path program 1 times [2023-12-02 19:36:56,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:56,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613447369] [2023-12-02 19:36:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:56,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-12-02 19:36:57,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:57,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613447369] [2023-12-02 19:36:57,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613447369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:57,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912445465] [2023-12-02 19:36:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:57,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:57,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:57,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:57,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3c84acd-8275-428d-97e6-15deef26b919/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:36:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:58,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 2954 conjuncts, 157 conjunts are in the unsatisfiable core [2023-12-02 19:36:58,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:58,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 19:36:58,561 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 19:36:58,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 19:36:58,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 19:36:58,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 19:36:58,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 19:37:00,149 INFO L349 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2023-12-02 19:37:00,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 37 [2023-12-02 19:37:00,286 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-02 19:37:00,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 19:37:00,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 19:37:00,554 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 19:37:00,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-12-02 19:37:00,566 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 19:37:00,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-12-02 19:37:00,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 19:37:00,890 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 19:37:00,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-12-02 19:37:00,905 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 19:37:00,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-12-02 19:37:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 37 proven. 59 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 19:37:04,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:37:04,804 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 11492 disjunctions. This might take some time... [2023-12-02 19:37:12,407 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 10816 disjunctions.