./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/bounded_buffer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-complex/bounded_buffer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur --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 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:18:15,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:18:15,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:18:15,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:18:15,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:18:15,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:18:15,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:18:15,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:18:15,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:18:15,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:18:15,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:18:15,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:18:15,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:18:15,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:18:15,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:18:15,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:18:15,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:18:15,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:18:15,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:18:15,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:18:15,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:18:15,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:18:15,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:18:15,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:18:15,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:18:15,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:18:15,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:18:15,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:18:15,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:18:15,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:18:15,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:18:15,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:18:15,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:18:15,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:18:15,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:18:15,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:18:15,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:18:15,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:18:15,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:18:15,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:18:15,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:18:15,806 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:18:15,832 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:18:15,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:18:15,833 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:18:15,833 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:18:15,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:18:15,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:18:15,834 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:18:15,834 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:18:15,834 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:18:15,834 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:18:15,835 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:18:15,835 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:18:15,835 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:18:15,835 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:18:15,835 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:18:15,836 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:18:15,836 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:18:15,836 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:18:15,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:18:15,837 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:18:15,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:18:15,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:18:15,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:18:15,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:18:15,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:18:15,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:18:15,838 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:18:15,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:18:15,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:18:15,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:18:15,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:18:15,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:18:15,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:18:15,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:18:15,840 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:18:15,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:18:15,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:18:15,841 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:18:15,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:18:15,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:18:15,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:18:15,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 [2022-11-25 23:18:16,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:18:16,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:18:16,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:18:16,250 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:18:16,252 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:18:16,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-11-25 23:18:19,402 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:18:19,832 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:18:19,836 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-11-25 23:18:19,861 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/data/542800c55/361e650312fc4651b55009ea4ea892e5/FLAGd6324f134 [2022-11-25 23:18:19,885 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/data/542800c55/361e650312fc4651b55009ea4ea892e5 [2022-11-25 23:18:19,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:18:19,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:18:19,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:18:19,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:18:19,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:18:19,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:18:19" (1/1) ... [2022-11-25 23:18:19,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfc42d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:19, skipping insertion in model container [2022-11-25 23:18:19,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:18:19" (1/1) ... [2022-11-25 23:18:19,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:18:20,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:18:20,901 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_b6f59240-bfa9-47bd-ae11-3921da7aac77/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2022-11-25 23:18:20,920 WARN L623 FunctionHandler]: Unknown extern function fflush [2022-11-25 23:18:20,925 WARN L623 FunctionHandler]: Unknown extern function fflush [2022-11-25 23:18:20,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:18:20,952 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:18:21,050 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_b6f59240-bfa9-47bd-ae11-3921da7aac77/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2022-11-25 23:18:21,064 WARN L623 FunctionHandler]: Unknown extern function fflush [2022-11-25 23:18:21,082 WARN L623 FunctionHandler]: Unknown extern function fflush [2022-11-25 23:18:21,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:18:21,211 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:18:21,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21 WrapperNode [2022-11-25 23:18:21,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:18:21,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:18:21,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:18:21,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:18:21,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,334 INFO L138 Inliner]: procedures = 428, calls = 126, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 458 [2022-11-25 23:18:21,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:18:21,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:18:21,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:18:21,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:18:21,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,409 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:18:21,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:18:21,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:18:21,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:18:21,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (1/1) ... [2022-11-25 23:18:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:18:21,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:18:21,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:18:21,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f59240-bfa9-47bd-ae11-3921da7aac77/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:18:21,534 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2022-11-25 23:18:21,535 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2022-11-25 23:18:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:18:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:18:21,535 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 23:18:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:18:21,536 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2022-11-25 23:18:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:18:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 23:18:21,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:18:21,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:18:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:18:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:18:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2022-11-25 23:18:21,539 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2022-11-25 23:18:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:18:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:18:21,543 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:18:21,867 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:18:21,869 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:18:22,802 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:18:22,822 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:18:22,822 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-25 23:18:22,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:18:22 BoogieIcfgContainer [2022-11-25 23:18:22,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:18:22,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:18:22,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:18:22,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:18:22,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:18:19" (1/3) ... [2022-11-25 23:18:22,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ff7bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:18:22, skipping insertion in model container [2022-11-25 23:18:22,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:21" (2/3) ... [2022-11-25 23:18:22,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ff7bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:18:22, skipping insertion in model container [2022-11-25 23:18:22,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:18:22" (3/3) ... [2022-11-25 23:18:22,836 INFO L112 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2022-11-25 23:18:22,844 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 23:18:22,852 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:18:22,853 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:18:22,853 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:18:23,001 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 23:18:23,039 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:18:23,054 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 435 places, 479 transitions, 980 flow [2022-11-25 23:18:23,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 435 places, 479 transitions, 980 flow [2022-11-25 23:18:23,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 479 transitions, 980 flow [2022-11-25 23:18:23,455 INFO L130 PetriNetUnfolder]: 109/1033 cut-off events. [2022-11-25 23:18:23,455 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-25 23:18:23,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 1033 events. 109/1033 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6124 event pairs, 0 based on Foata normal form. 0/916 useless extension candidates. Maximal degree in co-relation 543. Up to 16 conditions per place. [2022-11-25 23:18:23,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 106902 [2022-11-25 23:19:58,119 WARN L233 SmtUtils]: Spent 9.84s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:20:08,785 WARN L233 SmtUtils]: Spent 10.66s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:20:18,466 WARN L233 SmtUtils]: Spent 9.68s on a formula simplification that was a NOOP. DAG size: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:20:27,520 WARN L233 SmtUtils]: Spent 9.05s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:22:15,861 WARN L233 SmtUtils]: Spent 1.71m on a formula simplification that was a NOOP. DAG size: 271 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:23:26,671 WARN L233 SmtUtils]: Spent 1.18m on a formula simplification that was a NOOP. DAG size: 263 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:25:50,385 WARN L233 SmtUtils]: Spent 2.40m on a formula simplification. DAG size of input: 277 DAG size of output: 275 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:27:11,156 WARN L233 SmtUtils]: Spent 1.35m on a formula simplification that was a NOOP. DAG size: 266 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:27:11,326 INFO L134 LiptonReduction]: Checked pairs total: 277655 [2022-11-25 23:27:11,327 INFO L136 LiptonReduction]: Total number of compositions: 493 [2022-11-25 23:27:11,335 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 110 places, 135 transitions, 292 flow [2022-11-25 23:27:12,913 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31819 states, 31810 states have (on average 3.6839358692235145) internal successors, (117186), 31818 states have internal predecessors, (117186), 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) [2022-11-25 23:27:12,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:27:12,936 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;@5b70ee8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:27:12,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 23:27:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 31819 states, 31810 states have (on average 3.6839358692235145) internal successors, (117186), 31818 states have internal predecessors, (117186), 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) [2022-11-25 23:27:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:27:13,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:13,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2022-11-25 23:27:13,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 23:27:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:13,092 INFO L85 PathProgramCache]: Analyzing trace with hash -681931379, now seen corresponding path program 1 times [2022-11-25 23:27:13,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:27:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071320569] [2022-11-25 23:27:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:13,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:27:13,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 23:27:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:27:13,499 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-25 23:27:13,501 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 23:27:13,502 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 23:27:13,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 23:27:13,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-25 23:27:13,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 23:27:13,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:27:13,508 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-11-25 23:27:13,511 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 23:27:13,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 23:27:13,674 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-25 23:27:13,701 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:27:13,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 665 places, 734 transitions, 1516 flow [2022-11-25 23:27:13,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 665 places, 734 transitions, 1516 flow [2022-11-25 23:27:13,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 665 places, 734 transitions, 1516 flow [2022-11-25 23:27:15,605 INFO L130 PetriNetUnfolder]: 384/3352 cut-off events. [2022-11-25 23:27:15,605 INFO L131 PetriNetUnfolder]: For 72/84 co-relation queries the response was YES. [2022-11-25 23:27:15,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3449 conditions, 3352 events. 384/3352 cut-off events. For 72/84 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 26958 event pairs, 2 based on Foata normal form. 0/2975 useless extension candidates. Maximal degree in co-relation 1884. Up to 64 conditions per place. [2022-11-25 23:27:16,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 342760 [2022-11-25 23:29:14,527 WARN L233 SmtUtils]: Spent 1.19m on a formula simplification. DAG size of input: 194 DAG size of output: 192 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:29:45,695 WARN L233 SmtUtils]: Spent 31.17s on a formula simplification that was a NOOP. DAG size: 190 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:30:53,676 WARN L233 SmtUtils]: Spent 1.13m on a formula simplification. DAG size of input: 194 DAG size of output: 192 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:31:30,458 WARN L233 SmtUtils]: Spent 36.78s on a formula simplification that was a NOOP. DAG size: 190 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:32:44,400 WARN L233 SmtUtils]: Spent 1.14m on a formula simplification that was a NOOP. DAG size: 273 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)