./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --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 32bit --witnessprinter.graph.data.programhash 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- 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-6b4ec56 [2022-11-20 20:51:36,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:51:36,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:51:36,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:51:36,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:51:36,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:51:36,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:51:36,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:51:36,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:51:36,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:51:36,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:51:36,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:51:36,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:51:36,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:51:36,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:51:36,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:51:36,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:51:36,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:51:36,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:51:36,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:51:36,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:51:36,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:51:36,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:51:36,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:51:36,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:51:36,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:51:36,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:51:36,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:51:36,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:51:36,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:51:36,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:51:36,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:51:36,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:51:36,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:51:36,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:51:36,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:51:36,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:51:36,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:51:36,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:51:36,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:51:36,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:51:36,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:51:36,964 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:51:36,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:51:36,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:51:36,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:51:36,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:51:36,971 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:51:36,971 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:51:36,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:51:36,972 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:51:36,972 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:51:36,973 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:51:36,973 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:51:36,973 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:51:36,974 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:51:36,974 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:51:36,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:51:36,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:51:36,975 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:51:36,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:51:36,976 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:51:36,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:51:36,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:51:36,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:51:36,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:51:36,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:51:36,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:51:36,977 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:51:36,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:51:36,978 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:51:36,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:51:36,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:51:36,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:51:36,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:51:36,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:51:36,980 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:51:36,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:51:36,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:51:36,981 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:51:36,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:51:36,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:51:36,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:51:36,982 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_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2022-11-20 20:51:37,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:51:37,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:51:37,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:51:37,355 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:51:37,355 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:51:37,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-11-20 20:51:40,516 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:51:41,035 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:51:41,035 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-11-20 20:51:41,054 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/data/4dad7c4bc/9da720aa07b14b33a095ffa02fa9a5c7/FLAG4bcb3d0ee [2022-11-20 20:51:41,069 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/data/4dad7c4bc/9da720aa07b14b33a095ffa02fa9a5c7 [2022-11-20 20:51:41,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:51:41,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:51:41,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:51:41,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:51:41,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:51:41,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:51:41" (1/1) ... [2022-11-20 20:51:41,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be93fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:41, skipping insertion in model container [2022-11-20 20:51:41,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:51:41" (1/1) ... [2022-11-20 20:51:41,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:51:41,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:51:41,985 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_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-11-20 20:51:42,028 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_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-11-20 20:51:42,032 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_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-11-20 20:51:42,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:51:42,060 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:51:42,118 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_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-11-20 20:51:42,139 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_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-11-20 20:51:42,145 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_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-11-20 20:51:42,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:51:42,345 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:51:42,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42 WrapperNode [2022-11-20 20:51:42,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:51:42,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:51:42,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:51:42,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:51:42,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,474 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1719 [2022-11-20 20:51:42,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:51:42,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:51:42,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:51:42,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:51:42,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,574 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:51:42,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:51:42,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:51:42,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:51:42,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (1/1) ... [2022-11-20 20:51:42,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:51:42,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:51:42,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:51:42,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:51:42,693 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-11-20 20:51:42,693 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-11-20 20:51:42,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 20:51:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:51:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 20:51:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:51:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 20:51:42,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:51:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 20:51:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:51:42,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:51:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:51:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 20:51:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:51:42,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:51:42,698 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:51:43,088 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:51:43,091 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:51:45,000 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:51:45,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:51:45,411 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-20 20:51:45,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:51:45 BoogieIcfgContainer [2022-11-20 20:51:45,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:51:45,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:51:45,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:51:45,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:51:45,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:51:41" (1/3) ... [2022-11-20 20:51:45,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7064f279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:51:45, skipping insertion in model container [2022-11-20 20:51:45,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:51:42" (2/3) ... [2022-11-20 20:51:45,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7064f279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:51:45, skipping insertion in model container [2022-11-20 20:51:45,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:51:45" (3/3) ... [2022-11-20 20:51:45,431 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2022-11-20 20:51:45,441 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 20:51:45,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:51:45,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-20 20:51:45,453 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:51:45,716 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 20:51:45,779 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:51:45,809 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1625 places, 1670 transitions, 3348 flow [2022-11-20 20:51:45,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1625 places, 1670 transitions, 3348 flow [2022-11-20 20:51:45,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1625 places, 1670 transitions, 3348 flow [2022-11-20 20:51:47,179 INFO L130 PetriNetUnfolder]: 89/3097 cut-off events. [2022-11-20 20:51:47,180 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 20:51:47,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 3097 events. 89/3097 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14322 event pairs, 0 based on Foata normal form. 0/2995 useless extension candidates. Maximal degree in co-relation 1580. Up to 6 conditions per place. [2022-11-20 20:51:47,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 424168 [2022-11-20 20:55:33,114 WARN L233 SmtUtils]: Spent 13.98s on a formula simplification. DAG size of input: 244 DAG size of output: 235 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 20:55:40,202 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 207 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 20:55:52,879 WARN L233 SmtUtils]: Spent 12.67s on a formula simplification. DAG size of input: 244 DAG size of output: 235 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 20:55:59,327 WARN L233 SmtUtils]: Spent 6.44s on a formula simplification that was a NOOP. DAG size: 207 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 20:55:59,340 INFO L134 LiptonReduction]: Checked pairs total: 449302 [2022-11-20 20:55:59,340 INFO L136 LiptonReduction]: Total number of compositions: 1534 [2022-11-20 20:55:59,349 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 245 places, 272 transitions, 552 flow [2022-11-20 20:55:59,567 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5208 states, 5195 states have (on average 2.1582290664100094) internal successors, (11212), 5207 states have internal predecessors, (11212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:59,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:55:59,592 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=LoopsAndPotentialCycles, 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;@69e04bfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:55:59,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 20:55:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 5208 states, 5195 states have (on average 2.1582290664100094) internal successors, (11212), 5207 states have internal predecessors, (11212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:55:59,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:59,614 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-20 20:55:59,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 20:55:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash 700660802, now seen corresponding path program 1 times [2022-11-20 20:55:59,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:55:59,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507629432] [2022-11-20 20:55:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:59,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:55:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:56:00,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507629432] [2022-11-20 20:56:00,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507629432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:56:00,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:56:00,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:56:00,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33558288] [2022-11-20 20:56:00,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:56:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:56:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:56:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:56:00,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:56:00,252 INFO L87 Difference]: Start difference. First operand has 5208 states, 5195 states have (on average 2.1582290664100094) internal successors, (11212), 5207 states have internal predecessors, (11212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:56:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:03,823 INFO L93 Difference]: Finished difference Result 9718 states and 21213 transitions. [2022-11-20 20:56:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:56:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:56:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:03,892 INFO L225 Difference]: With dead ends: 9718 [2022-11-20 20:56:03,892 INFO L226 Difference]: Without dead ends: 9717 [2022-11-20 20:56:03,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:56:03,896 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 254 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:56:03,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 6 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 20:56:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9717 states. [2022-11-20 20:56:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9717 to 4977. [2022-11-20 20:56:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4977 states, 4971 states have (on average 2.1850734258700464) internal successors, (10862), 4976 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:56:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4977 states to 4977 states and 10862 transitions. [2022-11-20 20:56:04,171 INFO L78 Accepts]: Start accepts. Automaton has 4977 states and 10862 transitions. Word has length 7 [2022-11-20 20:56:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:04,172 INFO L495 AbstractCegarLoop]: Abstraction has 4977 states and 10862 transitions. [2022-11-20 20:56:04,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:56:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4977 states and 10862 transitions. [2022-11-20 20:56:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:56:04,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:04,173 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:56:04,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:56:04,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 20:56:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1277504889, now seen corresponding path program 1 times [2022-11-20 20:56:04,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431288198] [2022-11-20 20:56:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:04,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:56:04,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:04,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431288198] [2022-11-20 20:56:04,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431288198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:56:04,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936844939] [2022-11-20 20:56:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:04,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:56:04,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:56:04,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:56:04,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:56:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:04,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:56:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:56:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:56:04,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:56:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:56:04,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936844939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:56:04,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [399635688] [2022-11-20 20:56:04,835 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 20:56:04,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:56:04,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 20:56:04,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103803824] [2022-11-20 20:56:04,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:56:04,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:56:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:56:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:56:04,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:56:04,847 INFO L87 Difference]: Start difference. First operand 4977 states and 10862 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:56:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:05,481 INFO L93 Difference]: Finished difference Result 100 states and 178 transitions. [2022-11-20 20:56:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:56:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:56:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:05,482 INFO L225 Difference]: With dead ends: 100 [2022-11-20 20:56:05,482 INFO L226 Difference]: Without dead ends: 100 [2022-11-20 20:56:05,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:56:05,484 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 135 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:56:05,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 3 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:56:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-20 20:56:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-20 20:56:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.797979797979798) internal successors, (178), 99 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:56:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 178 transitions. [2022-11-20 20:56:05,489 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 178 transitions. Word has length 8 [2022-11-20 20:56:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:05,489 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 178 transitions. [2022-11-20 20:56:05,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:56:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 178 transitions. [2022-11-20 20:56:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:56:05,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:05,491 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-20 20:56:05,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:56:05,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4343d3-6e1c-4fd2-afe7-f4244a81c5fe/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:56:05,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 20:56:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1105648254, now seen corresponding path program 2 times [2022-11-20 20:56:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:05,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463106558] [2022-11-20 20:56:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:56:05,796 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:56:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:56:05,887 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:56:05,888 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:56:05,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 20:56:05,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 20:56:05,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 20:56:05,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 20:56:05,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 20:56:05,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 20:56:05,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:56:05,901 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1] [2022-11-20 20:56:05,903 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:56:05,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 20:56:06,008 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 20:56:06,022 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:56:06,023 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1772 places, 1820 transitions, 3658 flow [2022-11-20 20:56:06,023 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1772 places, 1820 transitions, 3658 flow [2022-11-20 20:56:06,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1772 places, 1820 transitions, 3658 flow [2022-11-20 20:56:08,177 INFO L130 PetriNetUnfolder]: 140/4719 cut-off events. [2022-11-20 20:56:08,178 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 20:56:08,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4733 conditions, 4719 events. 140/4719 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27276 event pairs, 0 based on Foata normal form. 0/4559 useless extension candidates. Maximal degree in co-relation 3099. Up to 9 conditions per place. [2022-11-20 20:56:09,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 895400