./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 2329fc70 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_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh --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-2329fc7 [2022-12-14 12:30:32,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:30:32,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:30:32,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:30:32,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:30:32,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:30:32,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:30:32,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:30:33,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:30:33,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:30:33,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:30:33,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:30:33,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:30:33,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:30:33,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:30:33,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:30:33,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:30:33,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:30:33,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:30:33,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:30:33,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:30:33,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:30:33,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:30:33,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:30:33,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:30:33,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:30:33,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:30:33,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:30:33,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:30:33,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:30:33,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:30:33,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:30:33,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:30:33,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:30:33,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:30:33,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:30:33,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:30:33,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:30:33,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:30:33,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:30:33,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:30:33,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:30:33,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:30:33,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:30:33,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:30:33,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:30:33,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:30:33,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:30:33,045 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:30:33,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:30:33,046 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:30:33,046 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:30:33,046 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:30:33,046 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:30:33,046 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:30:33,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:30:33,047 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:30:33,047 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:30:33,047 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:30:33,047 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:30:33,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:30:33,048 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:30:33,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:30:33,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:30:33,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:30:33,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:30:33,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:30:33,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:30:33,049 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:30:33,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:30:33,049 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:30:33,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:30:33,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:30:33,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:30:33,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:30:33,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:30:33,050 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:30:33,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:30:33,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:30:33,051 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:30:33,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:30:33,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:30:33,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:30:33,052 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_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2022-12-14 12:30:33,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:30:33,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:30:33,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:30:33,246 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:30:33,246 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:30:33,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-12-14 12:30:35,936 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:30:36,151 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:30:36,152 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-12-14 12:30:36,164 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/data/a4f8dc201/6f21ad1aec1d49d7b2661adc7fc31d67/FLAGbb5b792ee [2022-12-14 12:30:36,176 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/data/a4f8dc201/6f21ad1aec1d49d7b2661adc7fc31d67 [2022-12-14 12:30:36,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:30:36,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:30:36,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:30:36,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:30:36,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:30:36,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:36,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2286d17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36, skipping insertion in model container [2022-12-14 12:30:36,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:36,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:30:36,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:30:36,684 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_4cdaa150-1054-43fb-8af0-47efb8c960d5/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-12-14 12:30:36,688 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:30:36,689 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:30:36,691 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:30:36,692 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:30:36,711 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_4cdaa150-1054-43fb-8af0-47efb8c960d5/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-12-14 12:30:36,714 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_4cdaa150-1054-43fb-8af0-47efb8c960d5/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-12-14 12:30:36,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:30:36,734 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:30:36,769 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_4cdaa150-1054-43fb-8af0-47efb8c960d5/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-12-14 12:30:36,769 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:30:36,770 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:30:36,771 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 12:30:36,771 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 12:30:36,781 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_4cdaa150-1054-43fb-8af0-47efb8c960d5/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-12-14 12:30:36,783 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_4cdaa150-1054-43fb-8af0-47efb8c960d5/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-12-14 12:30:36,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:30:36,918 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:30:36,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36 WrapperNode [2022-12-14 12:30:36,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:30:36,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:30:36,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:30:36,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:30:36,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:36,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:36,990 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1719 [2022-12-14 12:30:36,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:30:36,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:30:36,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:30:36,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:30:36,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:36,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:37,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:37,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:37,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:37,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:37,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:37,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:37,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:30:37,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:30:37,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:30:37,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:30:37,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (1/1) ... [2022-12-14 12:30:37,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:30:37,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:37,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:30:37,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:30:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-12-14 12:30:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-12-14 12:30:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 12:30:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:30:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 12:30:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:30:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 12:30:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:30:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 12:30:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:30:37,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:30:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:30:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 12:30:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:30:37,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:30:37,136 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 12:30:37,384 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:30:37,386 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:30:38,617 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:30:38,816 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:30:38,816 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 12:30:38,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:30:38 BoogieIcfgContainer [2022-12-14 12:30:38,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:30:38,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:30:38,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:30:38,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:30:38,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:30:36" (1/3) ... [2022-12-14 12:30:38,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7549de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:30:38, skipping insertion in model container [2022-12-14 12:30:38,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:36" (2/3) ... [2022-12-14 12:30:38,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7549de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:30:38, skipping insertion in model container [2022-12-14 12:30:38,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:30:38" (3/3) ... [2022-12-14 12:30:38,825 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2022-12-14 12:30:38,832 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 12:30:38,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:30:38,840 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-12-14 12:30:38,840 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 12:30:38,955 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-14 12:30:38,995 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:30:39,006 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1625 places, 1670 transitions, 3348 flow [2022-12-14 12:30:39,008 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1625 places, 1670 transitions, 3348 flow [2022-12-14 12:30:39,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1625 places, 1670 transitions, 3348 flow [2022-12-14 12:30:39,774 INFO L130 PetriNetUnfolder]: 89/3097 cut-off events. [2022-12-14 12:30:39,774 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-14 12:30:39,807 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 14326 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. [2022-12-14 12:30:39,909 INFO L119 LiptonReduction]: Number of co-enabled transitions 424168 [2022-12-14 12:34:39,899 WARN L233 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 194 DAG size of output: 188 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 12:34:48,050 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 194 DAG size of output: 188 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 12:35:02,379 WARN L233 SmtUtils]: Spent 11.95s on a formula simplification. DAG size of input: 214 DAG size of output: 209 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 12:35:08,113 WARN L233 SmtUtils]: Spent 5.73s 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) [2022-12-14 12:35:19,309 WARN L233 SmtUtils]: Spent 11.19s on a formula simplification. DAG size of input: 214 DAG size of output: 209 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 12:35:24,866 WARN L233 SmtUtils]: Spent 5.56s 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) [2022-12-14 12:35:24,877 INFO L134 LiptonReduction]: Checked pairs total: 468001 [2022-12-14 12:35:24,877 INFO L136 LiptonReduction]: Total number of compositions: 1533 [2022-12-14 12:35:24,882 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 244 places, 271 transitions, 550 flow [2022-12-14 12:35:25,014 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5184 states, 5171 states have (on average 2.1587700638174434) internal successors, (11163), 5183 states have internal predecessors, (11163), 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) [2022-12-14 12:35:25,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:35:25,037 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;@7adf9b38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:35:25,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 12:35:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 5184 states, 5171 states have (on average 2.1587700638174434) internal successors, (11163), 5183 states have internal predecessors, (11163), 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) [2022-12-14 12:35:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:35:25,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:35:25,057 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-14 12:35:25,057 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)] === [2022-12-14 12:35:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:35:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash -179363168, now seen corresponding path program 1 times [2022-12-14 12:35:25,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:35:25,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194614619] [2022-12-14 12:35:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:25,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:35:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:35:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:35:25,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:35:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194614619] [2022-12-14 12:35:25,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194614619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:35:25,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:35:25,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:35:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041315351] [2022-12-14 12:35:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:35:25,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:35:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:35:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:35:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:35:25,414 INFO L87 Difference]: Start difference. First operand has 5184 states, 5171 states have (on average 2.1587700638174434) internal successors, (11163), 5183 states have internal predecessors, (11163), 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) [2022-12-14 12:35:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:35:28,729 INFO L93 Difference]: Finished difference Result 9672 states and 21163 transitions. [2022-12-14 12:35:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:35:28,732 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 [2022-12-14 12:35:28,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:35:28,777 INFO L225 Difference]: With dead ends: 9672 [2022-12-14 12:35:28,777 INFO L226 Difference]: Without dead ends: 9671 [2022-12-14 12:35:28,778 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 [2022-12-14 12:35:28,780 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 254 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:35:28,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 8 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 12:35:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2022-12-14 12:35:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 4954. [2022-12-14 12:35:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4954 states, 4948 states have (on average 2.1901778496362168) internal successors, (10837), 4953 states have internal predecessors, (10837), 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) [2022-12-14 12:35:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4954 states to 4954 states and 10837 transitions. [2022-12-14 12:35:28,953 INFO L78 Accepts]: Start accepts. Automaton has 4954 states and 10837 transitions. Word has length 7 [2022-12-14 12:35:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:35:28,953 INFO L495 AbstractCegarLoop]: Abstraction has 4954 states and 10837 transitions. [2022-12-14 12:35:28,953 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) [2022-12-14 12:35:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4954 states and 10837 transitions. [2022-12-14 12:35:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:35:28,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:35:28,954 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:35:28,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:35:28,954 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)] === [2022-12-14 12:35:28,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:35:28,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1380379260, now seen corresponding path program 1 times [2022-12-14 12:35:28,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:35:28,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352217717] [2022-12-14 12:35:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:28,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:35:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:35:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:35:29,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:35:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352217717] [2022-12-14 12:35:29,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352217717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:35:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095863143] [2022-12-14 12:35:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:29,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:29,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:35:29,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:35:29,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:35:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:35:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:35:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:35:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:35:29,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:35:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:35:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095863143] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:35:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1480059703] [2022-12-14 12:35:29,419 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:337) 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) [2022-12-14 12:35:29,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:35:29,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 12:35:29,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634110091] [2022-12-14 12:35:29,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:35:29,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:35:29,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:35:29,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:35:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:35:29,423 INFO L87 Difference]: Start difference. First operand 4954 states and 10837 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) [2022-12-14 12:35:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:35:29,930 INFO L93 Difference]: Finished difference Result 100 states and 178 transitions. [2022-12-14 12:35:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:35:29,931 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 [2022-12-14 12:35:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:35:29,931 INFO L225 Difference]: With dead ends: 100 [2022-12-14 12:35:29,931 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 12:35:29,932 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 [2022-12-14 12:35:29,932 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 135 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:35:29,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 3 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:35:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 12:35:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-12-14 12:35:29,935 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) [2022-12-14 12:35:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 178 transitions. [2022-12-14 12:35:29,936 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 178 transitions. Word has length 8 [2022-12-14 12:35:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:35:29,936 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 178 transitions. [2022-12-14 12:35:29,936 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) [2022-12-14 12:35:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 178 transitions. [2022-12-14 12:35:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:35:29,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:35:29,937 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-14 12:35:29,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:35:30,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cdaa150-1054-43fb-8af0-47efb8c960d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:30,138 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)] === [2022-12-14 12:35:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:35:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1180255328, now seen corresponding path program 2 times [2022-12-14 12:35:30,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:35:30,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639866401] [2022-12-14 12:35:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:30,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:35:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:35:30,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:35:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:35:30,241 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:35:30,241 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:35:30,242 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-14 12:35:30,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-14 12:35:30,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-14 12:35:30,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-14 12:35:30,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-14 12:35:30,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-14 12:35:30,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:35:30,245 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2022-12-14 12:35:30,247 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 12:35:30,247 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 12:35:30,319 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 12:35:30,327 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 12:35:30,327 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1772 places, 1820 transitions, 3658 flow [2022-12-14 12:35:30,327 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1772 places, 1820 transitions, 3658 flow [2022-12-14 12:35:30,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1772 places, 1820 transitions, 3658 flow [2022-12-14 12:35:31,710 INFO L130 PetriNetUnfolder]: 140/4719 cut-off events. [2022-12-14 12:35:31,710 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-14 12:35:31,752 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 27289 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. [2022-12-14 12:35:32,036 INFO L119 LiptonReduction]: Number of co-enabled transitions 895400