./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 115e066856baca443b44a0f6b5ce54f74ba2b2820e5612bf4393c0e893767d55 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:28:03,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:28:03,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:28:03,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:28:03,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:28:03,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:28:03,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:28:03,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:28:03,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:28:03,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:28:03,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:28:03,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:28:03,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:28:03,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:28:03,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:28:03,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:28:03,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:28:03,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:28:03,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:28:03,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:28:03,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:28:03,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:28:03,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:28:03,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:28:03,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:28:03,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:28:03,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:28:03,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:28:03,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:28:03,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:28:03,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:28:03,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:28:03,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:28:03,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:28:03,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:28:03,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:28:03,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:28:03,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:28:03,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:28:03,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:28:03,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:28:03,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:28:03,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:28:03,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:28:03,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:28:03,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:28:03,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:28:03,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:28:03,828 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:28:03,828 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:28:03,828 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:28:03,829 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:28:03,829 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:28:03,829 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:28:03,829 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:28:03,830 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:28:03,830 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:28:03,830 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:28:03,830 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:28:03,831 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:28:03,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:28:03,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:28:03,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:28:03,832 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:28:03,832 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:28:03,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:28:03,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:28:03,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:28:03,833 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:28:03,833 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:28:03,833 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:28:03,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:28:03,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:28:03,834 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:28:03,834 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:28:03,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:28:03,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:28:03,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:28:03,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:28:03,840 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:28:03,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:28:03,840 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:28:03,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:28:03,840 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:28:03,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 115e066856baca443b44a0f6b5ce54f74ba2b2820e5612bf4393c0e893767d55 [2022-11-25 23:28:04,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:28:04,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:28:04,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:28:04,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:28:04,198 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:28:04,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2022-11-25 23:28:07,227 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:28:07,604 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:28:07,605 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2022-11-25 23:28:07,623 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/data/380a3e92a/c30dc46e272041b5b7ac346b3ed3839e/FLAG88f89d5ee [2022-11-25 23:28:07,639 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/data/380a3e92a/c30dc46e272041b5b7ac346b3ed3839e [2022-11-25 23:28:07,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:28:07,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:28:07,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:28:07,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:28:07,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:28:07,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:28:07" (1/1) ... [2022-11-25 23:28:07,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbeb351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:07, skipping insertion in model container [2022-11-25 23:28:07,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:28:07" (1/1) ... [2022-11-25 23:28:07,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:28:07,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:28:08,413 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,415 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,417 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,426 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,428 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,437 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,441 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,443 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,462 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,463 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,465 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,467 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,468 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,483 WARN L237 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_9397fa57-0d2c-4f63-94e7-50591b66ba8e/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i[63494,63507] [2022-11-25 23:28:08,487 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,491 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,501 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,507 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:28:08,560 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:28:08,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,642 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,646 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,651 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,653 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,665 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,667 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,691 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,694 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,700 WARN L237 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_9397fa57-0d2c-4f63-94e7-50591b66ba8e/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i[63494,63507] [2022-11-25 23:28:08,710 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,711 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,711 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,712 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,713 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,713 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:28:08,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:28:08,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:28:08,859 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:28:08,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08 WrapperNode [2022-11-25 23:28:08,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:28:08,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:28:08,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:28:08,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:28:08,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:08,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,077 INFO L138 Inliner]: procedures = 397, calls = 214, calls flagged for inlining = 52, calls inlined = 211, statements flattened = 3713 [2022-11-25 23:28:09,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:28:09,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:28:09,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:28:09,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:28:09,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:28:09,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:28:09,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:28:09,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:28:09,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (1/1) ... [2022-11-25 23:28:09,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:28:09,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:28:09,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:28:09,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9397fa57-0d2c-4f63-94e7-50591b66ba8e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:28:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 23:28:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:28:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 23:28:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:28:09,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:28:09,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 23:28:09,521 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2022-11-25 23:28:09,521 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2022-11-25 23:28:09,522 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2022-11-25 23:28:09,522 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2022-11-25 23:28:09,522 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2022-11-25 23:28:09,523 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2022-11-25 23:28:09,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:28:09,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:28:09,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:28:09,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:28:09,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 23:28:09,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:28:09,524 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2022-11-25 23:28:09,525 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2022-11-25 23:28:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2022-11-25 23:28:09,525 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2022-11-25 23:28:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2022-11-25 23:28:09,525 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2022-11-25 23:28:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2022-11-25 23:28:09,526 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2022-11-25 23:28:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:28:09,530 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:28:10,040 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:28:10,043 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:28:15,301 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:28:22,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:28:22,145 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 23:28:22,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:28:22 BoogieIcfgContainer [2022-11-25 23:28:22,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:28:22,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:28:22,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:28:22,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:28:22,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:28:07" (1/3) ... [2022-11-25 23:28:22,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ebc0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:28:22, skipping insertion in model container [2022-11-25 23:28:22,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:28:08" (2/3) ... [2022-11-25 23:28:22,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ebc0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:28:22, skipping insertion in model container [2022-11-25 23:28:22,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:28:22" (3/3) ... [2022-11-25 23:28:22,164 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack.i [2022-11-25 23:28:22,185 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:28:22,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1344 error locations. [2022-11-25 23:28:22,186 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:28:24,935 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 23:28:25,037 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:28:25,071 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 3786 places, 3911 transitions, 7857 flow [2022-11-25 23:28:25,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 3786 places, 3911 transitions, 7857 flow [2022-11-25 23:28:25,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3786 places, 3911 transitions, 7857 flow [2022-11-25 23:28:35,644 INFO L130 PetriNetUnfolder]: 147/3904 cut-off events. [2022-11-25 23:28:35,645 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 23:28:36,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 3904 events. 147/3904 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 31773 event pairs, 0 based on Foata normal form. 0/2413 useless extension candidates. Maximal degree in co-relation 3844. Up to 6 conditions per place. [2022-11-25 23:28:39,268 INFO L119 LiptonReduction]: Number of co-enabled transitions 12477512 [2022-11-25 23:30:27,841 WARN L233 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 274 DAG size of output: 239 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:30:46,115 WARN L233 SmtUtils]: Spent 13.34s on a formula simplification. DAG size of input: 292 DAG size of output: 254 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:30:51,666 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 249 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:33:51,764 WARN L233 SmtUtils]: Spent 3.00m on a formula simplification. DAG size of input: 469 DAG size of output: 411 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:35:10,577 WARN L233 SmtUtils]: Spent 1.31m on a formula simplification that was a NOOP. DAG size: 404 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:38:24,447 WARN L233 SmtUtils]: Spent 3.23m on a formula simplification. DAG size of input: 519 DAG size of output: 457 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:39:49,178 WARN L233 SmtUtils]: Spent 1.41m on a formula simplification that was a NOOP. DAG size: 449 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:41:02,278 WARN L233 SmtUtils]: Spent 10.55s on a formula simplification. DAG size of input: 274 DAG size of output: 239 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:41:20,096 WARN L233 SmtUtils]: Spent 13.01s on a formula simplification. DAG size of input: 292 DAG size of output: 254 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:41:25,867 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 249 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:43:01,324 WARN L233 SmtUtils]: Spent 1.59m on a formula simplification. DAG size of input: 441 DAG size of output: 395 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)