./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.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_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- 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 17:33:06,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:33:06,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:33:06,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:33:06,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:33:06,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:33:06,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:33:06,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:33:06,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:33:06,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:33:06,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:33:06,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:33:06,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:33:06,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:33:06,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:33:06,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:33:06,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:33:06,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:33:06,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:33:06,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:33:06,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:33:06,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:33:06,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:33:06,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:33:06,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:33:06,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:33:06,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:33:06,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:33:06,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:33:06,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:33:06,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:33:06,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:33:06,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:33:06,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:33:06,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:33:06,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:33:06,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:33:06,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:33:06,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:33:06,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:33:06,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:33:06,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:33:06,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:33:06,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:33:06,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:33:06,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:33:06,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:33:06,903 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:33:06,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:33:06,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:33:06,905 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:33:06,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:33:06,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:33:06,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:33:06,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:33:06,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:33:06,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:33:06,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:33:06,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:33:06,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:33:06,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:33:06,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:33:06,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:33:06,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:33:06,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:33:06,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:33:06,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:33:06,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:33:06,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:33:06,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:33:06,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:33:06,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:33:06,913 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:33:06,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:33:06,914 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:33:06,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:33:06,915 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2022-11-25 17:33:07,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:33:07,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:33:07,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:33:07,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:33:07,331 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:33:07,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-11-25 17:33:10,546 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:33:10,904 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:33:10,905 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2022-11-25 17:33:10,919 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/data/323f11254/f34b9731f7834367bb12f1b6e5a65f14/FLAG6d9473ba9 [2022-11-25 17:33:10,937 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/data/323f11254/f34b9731f7834367bb12f1b6e5a65f14 [2022-11-25 17:33:10,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:33:10,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:33:10,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:33:10,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:33:10,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:33:10,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:33:10" (1/1) ... [2022-11-25 17:33:10,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8f311d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:10, skipping insertion in model container [2022-11-25 17:33:10,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:33:10" (1/1) ... [2022-11-25 17:33:10,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:33:11,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:33:11,448 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_8cb72919-b7f9-4b4d-959f-d3facabf44b7/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2022-11-25 17:33:11,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:33:11,520 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:33:11,589 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_8cb72919-b7f9-4b4d-959f-d3facabf44b7/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2022-11-25 17:33:11,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:33:11,678 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:33:11,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11 WrapperNode [2022-11-25 17:33:11,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:33:11,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:33:11,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:33:11,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:33:11,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,740 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-11-25 17:33:11,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:33:11,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:33:11,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:33:11,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:33:11,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,772 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:33:11,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:33:11,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:33:11,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:33:11,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (1/1) ... [2022-11-25 17:33:11,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:33:11,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:11,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:33:11,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:33:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:33:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:33:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:33:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:33:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:33:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:33:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:33:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:33:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:33:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:33:11,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:33:11,883 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:33:12,129 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:33:12,132 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:33:12,422 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:33:12,432 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:33:12,432 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-25 17:33:12,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:33:12 BoogieIcfgContainer [2022-11-25 17:33:12,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:33:12,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:33:12,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:33:12,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:33:12,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:33:10" (1/3) ... [2022-11-25 17:33:12,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389161c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:33:12, skipping insertion in model container [2022-11-25 17:33:12,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:11" (2/3) ... [2022-11-25 17:33:12,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389161c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:33:12, skipping insertion in model container [2022-11-25 17:33:12,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:33:12" (3/3) ... [2022-11-25 17:33:12,448 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2022-11-25 17:33:12,459 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:33:12,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:33:12,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:33:12,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:33:12,588 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 17:33:12,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 146 transitions, 300 flow [2022-11-25 17:33:12,757 INFO L130 PetriNetUnfolder]: 26/222 cut-off events. [2022-11-25 17:33:12,758 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:33:12,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 222 events. 26/222 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 581 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2022-11-25 17:33:12,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 146 transitions, 300 flow [2022-11-25 17:33:12,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 141 transitions, 287 flow [2022-11-25 17:33:12,834 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:33:12,865 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 141 transitions, 287 flow [2022-11-25 17:33:12,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 141 transitions, 287 flow [2022-11-25 17:33:12,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 141 transitions, 287 flow [2022-11-25 17:33:12,969 INFO L130 PetriNetUnfolder]: 25/217 cut-off events. [2022-11-25 17:33:12,976 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:33:12,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 25/217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 530 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2022-11-25 17:33:12,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2022-11-25 17:33:18,324 INFO L134 LiptonReduction]: Checked pairs total: 4777 [2022-11-25 17:33:18,324 INFO L136 LiptonReduction]: Total number of compositions: 139 [2022-11-25 17:33:18,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:33:18,351 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=PETRI_NET, 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;@62e8b291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:33:18,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:33:18,359 INFO L130 PetriNetUnfolder]: 7/24 cut-off events. [2022-11-25 17:33:18,359 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:33:18,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:18,361 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:33:18,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:33:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -903008381, now seen corresponding path program 1 times [2022-11-25 17:33:18,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958692246] [2022-11-25 17:33:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:18,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:18,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958692246] [2022-11-25 17:33:18,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958692246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:33:18,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:33:18,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:33:18,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388166722] [2022-11-25 17:33:18,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:33:18,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:33:18,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:33:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:33:18,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 285 [2022-11-25 17:33:18,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 33 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 17:33:18,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:18,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 285 [2022-11-25 17:33:18,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:18,997 INFO L130 PetriNetUnfolder]: 116/262 cut-off events. [2022-11-25 17:33:18,997 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:33:19,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 262 events. 116/262 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 893 event pairs, 38 based on Foata normal form. 15/230 useless extension candidates. Maximal degree in co-relation 472. Up to 136 conditions per place. [2022-11-25 17:33:19,006 INFO L137 encePairwiseOnDemand]: 270/285 looper letters, 25 selfloop transitions, 2 changer transitions 9/38 dead transitions. [2022-11-25 17:33:19,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 38 transitions, 153 flow [2022-11-25 17:33:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:33:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:33:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-11-25 17:33:19,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2022-11-25 17:33:19,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-11-25 17:33:19,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-11-25 17:33:19,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:19,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-11-25 17:33:19,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 17:33:19,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 17:33:19,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 17:33:19,065 INFO L175 Difference]: Start difference. First operand has 25 places, 33 transitions, 71 flow. Second operand 3 states and 441 transitions. [2022-11-25 17:33:19,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 38 transitions, 153 flow [2022-11-25 17:33:19,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:33:19,071 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 69 flow [2022-11-25 17:33:19,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2022-11-25 17:33:19,077 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-11-25 17:33:19,077 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 69 flow [2022-11-25 17:33:19,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 17:33:19,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:19,078 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:33:19,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:33:19,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:33:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash -902980191, now seen corresponding path program 1 times [2022-11-25 17:33:19,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:19,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743149034] [2022-11-25 17:33:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:19,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:33:19,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:33:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:33:19,183 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:33:19,183 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:33:19,185 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-25 17:33:19,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-25 17:33:19,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-25 17:33:19,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:33:19,188 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:33:19,191 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:33:19,191 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:33:19,210 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:33:19,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 170 transitions, 358 flow [2022-11-25 17:33:19,278 INFO L130 PetriNetUnfolder]: 43/347 cut-off events. [2022-11-25 17:33:19,279 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:33:19,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 347 events. 43/347 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1228 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2022-11-25 17:33:19,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 170 transitions, 358 flow [2022-11-25 17:33:19,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 170 transitions, 358 flow [2022-11-25 17:33:19,285 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:33:19,285 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 170 transitions, 358 flow [2022-11-25 17:33:19,285 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 170 transitions, 358 flow [2022-11-25 17:33:19,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 170 transitions, 358 flow [2022-11-25 17:33:19,329 INFO L130 PetriNetUnfolder]: 43/347 cut-off events. [2022-11-25 17:33:19,329 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:33:19,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 347 events. 43/347 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1228 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2022-11-25 17:33:19,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 8668 [2022-11-25 17:33:24,678 INFO L134 LiptonReduction]: Checked pairs total: 13768 [2022-11-25 17:33:24,678 INFO L136 LiptonReduction]: Total number of compositions: 163 [2022-11-25 17:33:24,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:33:24,682 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=PETRI_NET, 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;@62e8b291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:33:24,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:33:24,687 INFO L130 PetriNetUnfolder]: 6/24 cut-off events. [2022-11-25 17:33:24,687 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:33:24,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:24,687 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:33:24,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:33:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1064784550, now seen corresponding path program 1 times [2022-11-25 17:33:24,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:24,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111489220] [2022-11-25 17:33:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:24,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:24,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111489220] [2022-11-25 17:33:24,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111489220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:33:24,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:33:24,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:33:24,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485636497] [2022-11-25 17:33:24,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:33:24,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:33:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:33:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:33:24,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 333 [2022-11-25 17:33:24,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 47 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 17:33:24,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:24,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 333 [2022-11-25 17:33:24,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:25,485 INFO L130 PetriNetUnfolder]: 2025/3419 cut-off events. [2022-11-25 17:33:25,485 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-11-25 17:33:25,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6812 conditions, 3419 events. 2025/3419 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 18065 event pairs, 856 based on Foata normal form. 106/2978 useless extension candidates. Maximal degree in co-relation 2502. Up to 1665 conditions per place. [2022-11-25 17:33:25,501 INFO L137 encePairwiseOnDemand]: 316/333 looper letters, 53 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2022-11-25 17:33:25,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 62 transitions, 264 flow [2022-11-25 17:33:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:33:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:33:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2022-11-25 17:33:25,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2022-11-25 17:33:25,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2022-11-25 17:33:25,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2022-11-25 17:33:25,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:25,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2022-11-25 17:33:25,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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 17:33:25,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 17:33:25,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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 17:33:25,514 INFO L175 Difference]: Start difference. First operand has 38 places, 47 transitions, 112 flow. Second operand 3 states and 518 transitions. [2022-11-25 17:33:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 62 transitions, 264 flow [2022-11-25 17:33:25,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:33:25,520 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 132 flow [2022-11-25 17:33:25,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2022-11-25 17:33:25,521 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2022-11-25 17:33:25,521 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 132 flow [2022-11-25 17:33:25,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 17:33:25,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:25,522 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:33:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:33:25,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 17:33:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1581534091, now seen corresponding path program 1 times [2022-11-25 17:33:25,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:25,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249669771] [2022-11-25 17:33:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:25,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:33:25,575 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:33:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:33:25,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:33:25,610 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:33:25,610 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 17:33:25,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 17:33:25,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 17:33:25,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 17:33:25,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:33:25,612 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 17:33:25,612 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:33:25,613 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:33:25,631 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:33:25,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 194 transitions, 418 flow [2022-11-25 17:33:25,717 INFO L130 PetriNetUnfolder]: 65/505 cut-off events. [2022-11-25 17:33:25,717 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:33:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 505 events. 65/505 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2044 event pairs, 1 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 355. Up to 16 conditions per place. [2022-11-25 17:33:25,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 194 transitions, 418 flow [2022-11-25 17:33:25,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 194 transitions, 418 flow [2022-11-25 17:33:25,726 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:33:25,726 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 194 transitions, 418 flow [2022-11-25 17:33:25,727 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 194 transitions, 418 flow [2022-11-25 17:33:25,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 194 transitions, 418 flow [2022-11-25 17:33:25,807 INFO L130 PetriNetUnfolder]: 65/505 cut-off events. [2022-11-25 17:33:25,807 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:33:25,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 505 events. 65/505 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2044 event pairs, 1 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 355. Up to 16 conditions per place. [2022-11-25 17:33:25,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 14652 [2022-11-25 17:33:31,575 INFO L134 LiptonReduction]: Checked pairs total: 24315 [2022-11-25 17:33:31,575 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-11-25 17:33:31,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:33:31,579 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=PETRI_NET, 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;@62e8b291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:33:31,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 17:33:31,584 INFO L130 PetriNetUnfolder]: 7/26 cut-off events. [2022-11-25 17:33:31,584 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:33:31,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:31,584 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:33:31,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:33:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:31,585 INFO L85 PathProgramCache]: Analyzing trace with hash 39442156, now seen corresponding path program 1 times [2022-11-25 17:33:31,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:31,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557672128] [2022-11-25 17:33:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:31,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:31,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557672128] [2022-11-25 17:33:31,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557672128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:33:31,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:33:31,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:33:31,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857080855] [2022-11-25 17:33:31,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:33:31,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:33:31,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:31,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:33:31,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:33:31,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 377 [2022-11-25 17:33:31,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 59 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 17:33:31,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:31,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 377 [2022-11-25 17:33:31,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:34,615 INFO L130 PetriNetUnfolder]: 16085/24576 cut-off events. [2022-11-25 17:33:34,616 INFO L131 PetriNetUnfolder]: For 716/716 co-relation queries the response was YES. [2022-11-25 17:33:34,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48519 conditions, 24576 events. 16085/24576 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 164779 event pairs, 7332 based on Foata normal form. 1832/22722 useless extension candidates. Maximal degree in co-relation 5881. Up to 11972 conditions per place. [2022-11-25 17:33:34,816 INFO L137 encePairwiseOnDemand]: 354/377 looper letters, 62 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2022-11-25 17:33:34,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 323 flow [2022-11-25 17:33:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:33:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:33:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-11-25 17:33:34,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5225464190981433 [2022-11-25 17:33:34,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-11-25 17:33:34,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-11-25 17:33:34,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:34,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-11-25 17:33:34,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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 17:33:34,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 17:33:34,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 17:33:34,826 INFO L175 Difference]: Start difference. First operand has 47 places, 59 transitions, 148 flow. Second operand 3 states and 591 transitions. [2022-11-25 17:33:34,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 323 flow [2022-11-25 17:33:34,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 323 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:33:34,836 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 170 flow [2022-11-25 17:33:34,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2022-11-25 17:33:34,838 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2022-11-25 17:33:34,838 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 170 flow [2022-11-25 17:33:34,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 17:33:34,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:34,840 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:33:34,840 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:33:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash -155057643, now seen corresponding path program 1 times [2022-11-25 17:33:34,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:34,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917426303] [2022-11-25 17:33:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:34,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:34,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:34,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917426303] [2022-11-25 17:33:34,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917426303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:33:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473824049] [2022-11-25 17:33:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:34,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:34,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:34,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:33:35,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:33:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:33:35,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:35,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:35,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473824049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:35,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:33:35,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:33:35,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745826508] [2022-11-25 17:33:35,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:35,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:33:35,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:33:35,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:33:35,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 377 [2022-11-25 17:33:35,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 164.85714285714286) internal successors, (1154), 7 states have internal predecessors, (1154), 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 17:33:35,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:35,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 377 [2022-11-25 17:33:35,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:35,546 INFO L130 PetriNetUnfolder]: 1105/1879 cut-off events. [2022-11-25 17:33:35,547 INFO L131 PetriNetUnfolder]: For 788/788 co-relation queries the response was YES. [2022-11-25 17:33:35,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 1879 events. 1105/1879 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9918 event pairs, 0 based on Foata normal form. 0/1879 useless extension candidates. Maximal degree in co-relation 4417. Up to 1030 conditions per place. [2022-11-25 17:33:35,560 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 46 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-11-25 17:33:35,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 54 transitions, 251 flow [2022-11-25 17:33:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:33:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:33:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1026 transitions. [2022-11-25 17:33:35,565 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4535809018567639 [2022-11-25 17:33:35,566 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1026 transitions. [2022-11-25 17:33:35,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1026 transitions. [2022-11-25 17:33:35,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:35,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1026 transitions. [2022-11-25 17:33:35,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 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 17:33:35,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 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 17:33:35,578 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 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 17:33:35,578 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 170 flow. Second operand 6 states and 1026 transitions. [2022-11-25 17:33:35,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 54 transitions, 251 flow [2022-11-25 17:33:35,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 54 transitions, 243 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 17:33:35,586 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 81 flow [2022-11-25 17:33:35,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=81, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2022-11-25 17:33:35,591 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -10 predicate places. [2022-11-25 17:33:35,591 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 81 flow [2022-11-25 17:33:35,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.85714285714286) internal successors, (1154), 7 states have internal predecessors, (1154), 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 17:33:35,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:35,593 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:33:35,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:35,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:33:35,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 17:33:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1494946864, now seen corresponding path program 1 times [2022-11-25 17:33:35,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:35,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233668259] [2022-11-25 17:33:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:33:35,834 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:33:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:33:35,868 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:33:35,868 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:33:35,870 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 17:33:35,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 17:33:35,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 17:33:35,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 17:33:35,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 17:33:35,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:33:35,884 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 17:33:35,885 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:33:35,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:33:35,919 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 17:33:35,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 218 transitions, 480 flow [2022-11-25 17:33:36,073 INFO L130 PetriNetUnfolder]: 99/731 cut-off events. [2022-11-25 17:33:36,073 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:33:36,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 731 events. 99/731 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3266 event pairs, 6 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 525. Up to 32 conditions per place. [2022-11-25 17:33:36,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 218 transitions, 480 flow [2022-11-25 17:33:36,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 218 transitions, 480 flow [2022-11-25 17:33:36,088 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:33:36,088 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 218 transitions, 480 flow [2022-11-25 17:33:36,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 218 transitions, 480 flow [2022-11-25 17:33:36,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 218 transitions, 480 flow [2022-11-25 17:33:36,203 INFO L130 PetriNetUnfolder]: 99/731 cut-off events. [2022-11-25 17:33:36,203 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:33:36,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 731 events. 99/731 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3266 event pairs, 6 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 525. Up to 32 conditions per place. [2022-11-25 17:33:36,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 21736 [2022-11-25 17:33:42,954 INFO L134 LiptonReduction]: Checked pairs total: 38483 [2022-11-25 17:33:42,954 INFO L136 LiptonReduction]: Total number of compositions: 205 [2022-11-25 17:33:42,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:33:42,957 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=PETRI_NET, 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;@62e8b291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:33:42,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 17:33:42,960 INFO L130 PetriNetUnfolder]: 6/24 cut-off events. [2022-11-25 17:33:42,960 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:33:42,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:42,961 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:33:42,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:33:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash 368355584, now seen corresponding path program 1 times [2022-11-25 17:33:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:42,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009173257] [2022-11-25 17:33:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:42,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:43,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009173257] [2022-11-25 17:33:43,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009173257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:33:43,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:33:43,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:33:43,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047926152] [2022-11-25 17:33:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:33:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:33:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:33:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:33:43,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2022-11-25 17:33:43,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 67 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 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 17:33:43,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:43,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2022-11-25 17:33:43,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:07,403 INFO L130 PetriNetUnfolder]: 192659/266625 cut-off events. [2022-11-25 17:34:07,403 INFO L131 PetriNetUnfolder]: For 8984/8984 co-relation queries the response was YES. [2022-11-25 17:34:07,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529832 conditions, 266625 events. 192659/266625 cut-off events. For 8984/8984 co-relation queries the response was YES. Maximal size of possible extension queue 5402. Compared 1900257 event pairs, 91390 based on Foata normal form. 4696/235983 useless extension candidates. Maximal degree in co-relation 66252. Up to 136158 conditions per place. [2022-11-25 17:34:09,224 INFO L137 encePairwiseOnDemand]: 398/423 looper letters, 77 selfloop transitions, 7 changer transitions 0/89 dead transitions. [2022-11-25 17:34:09,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 402 flow [2022-11-25 17:34:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2022-11-25 17:34:09,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5216706067769897 [2022-11-25 17:34:09,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2022-11-25 17:34:09,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2022-11-25 17:34:09,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:09,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2022-11-25 17:34:09,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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 17:34:09,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 17:34:09,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 17:34:09,235 INFO L175 Difference]: Start difference. First operand has 56 places, 67 transitions, 178 flow. Second operand 3 states and 662 transitions. [2022-11-25 17:34:09,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 402 flow [2022-11-25 17:34:09,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 89 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:34:09,241 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 210 flow [2022-11-25 17:34:09,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2022-11-25 17:34:09,244 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2022-11-25 17:34:09,244 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 210 flow [2022-11-25 17:34:09,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 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 17:34:09,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:09,246 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:09,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:34:09,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 17:34:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1719213866, now seen corresponding path program 1 times [2022-11-25 17:34:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:09,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390802399] [2022-11-25 17:34:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:09,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:09,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390802399] [2022-11-25 17:34:09,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390802399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:09,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401932519] [2022-11-25 17:34:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:09,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:09,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:09,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:09,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cb72919-b7f9-4b4d-959f-d3facabf44b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:34:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:09,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:34:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:09,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:09,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401932519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:09,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:34:09,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:34:09,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562569424] [2022-11-25 17:34:09,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:09,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:34:09,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:34:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:34:09,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2022-11-25 17:34:09,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 182.85714285714286) internal successors, (1280), 7 states have internal predecessors, (1280), 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 17:34:09,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:09,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2022-11-25 17:34:09,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand