./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8 --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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:58:07,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:58:07,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:58:07,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:58:07,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:58:07,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:58:07,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:58:07,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:58:07,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:58:07,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:58:07,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:58:07,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:58:07,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:58:07,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:58:07,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:58:07,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:58:07,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:58:07,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:58:07,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:58:07,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:58:07,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:58:07,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:58:07,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:58:07,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:58:07,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:58:07,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:58:07,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:58:07,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:58:07,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:58:07,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:58:07,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:58:07,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:58:07,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:58:07,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:58:07,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:58:07,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:58:07,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:58:07,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:58:07,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:58:07,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:58:07,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:58:07,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:58:07,927 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:58:07,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:58:07,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:58:07,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:58:07,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:58:07,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:58:07,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:58:07,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:58:07,929 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:58:07,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:58:07,929 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:58:07,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:58:07,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:58:07,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:58:07,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:58:07,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:58:07,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:58:07,930 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:58:07,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:58:07,930 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:58:07,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:58:07,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:58:07,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:58:07,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:58:07,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:58:07,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:58:07,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:58:07,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:58:07,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:58:07,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:58:07,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:58:07,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:58:07,931 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:58:07,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:58:07,932 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:58:07,932 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_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2022-12-13 16:58:08,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:58:08,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:58:08,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:58:08,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:58:08,133 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:58:08,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/stack-2.i [2022-12-13 16:58:10,660 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:58:10,865 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:58:10,866 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/sv-benchmarks/c/pthread/stack-2.i [2022-12-13 16:58:10,876 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/data/239d90b05/65603f65e4644ca0ba8a2c333b743eeb/FLAGc9d2a5768 [2022-12-13 16:58:11,261 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/data/239d90b05/65603f65e4644ca0ba8a2c333b743eeb [2022-12-13 16:58:11,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:58:11,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:58:11,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:58:11,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:58:11,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:58:11,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22cc0fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11, skipping insertion in model container [2022-12-13 16:58:11,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:58:11,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:58:11,571 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_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-12-13 16:58:11,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:58:11,598 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:58:11,624 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_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-12-13 16:58:11,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:58:11,667 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:58:11,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11 WrapperNode [2022-12-13 16:58:11,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:58:11,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:58:11,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:58:11,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:58:11,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,703 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2022-12-13 16:58:11,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:58:11,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:58:11,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:58:11,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:58:11,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,720 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:58:11,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:58:11,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:58:11,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:58:11,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (1/1) ... [2022-12-13 16:58:11,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:58:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:11,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:58:11,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:58:11,782 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 16:58:11,782 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 16:58:11,782 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 16:58:11,782 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 16:58:11,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:58:11,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:58:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:58:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:58:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 16:58:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:58:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:58:11,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:58:11,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:58:11,785 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:58:11,889 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:58:11,891 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:58:12,115 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:58:12,124 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:58:12,124 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 16:58:12,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:58:12 BoogieIcfgContainer [2022-12-13 16:58:12,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:58:12,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:58:12,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:58:12,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:58:12,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:58:11" (1/3) ... [2022-12-13 16:58:12,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b95e5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:58:12, skipping insertion in model container [2022-12-13 16:58:12,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:58:11" (2/3) ... [2022-12-13 16:58:12,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b95e5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:58:12, skipping insertion in model container [2022-12-13 16:58:12,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:58:12" (3/3) ... [2022-12-13 16:58:12,135 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2022-12-13 16:58:12,144 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:58:12,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:58:12,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 16:58:12,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:58:12,226 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:58:12,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 183 transitions, 382 flow [2022-12-13 16:58:12,300 INFO L130 PetriNetUnfolder]: 10/181 cut-off events. [2022-12-13 16:58:12,300 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:58:12,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 10/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 434 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-12-13 16:58:12,305 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 183 transitions, 382 flow [2022-12-13 16:58:12,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 171 transitions, 351 flow [2022-12-13 16:58:12,311 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:58:12,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 171 transitions, 351 flow [2022-12-13 16:58:12,321 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 171 transitions, 351 flow [2022-12-13 16:58:12,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 171 transitions, 351 flow [2022-12-13 16:58:12,348 INFO L130 PetriNetUnfolder]: 10/171 cut-off events. [2022-12-13 16:58:12,348 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:58:12,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 171 events. 10/171 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 343 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-12-13 16:58:12,353 INFO L119 LiptonReduction]: Number of co-enabled transitions 9552 [2022-12-13 16:58:15,498 INFO L134 LiptonReduction]: Checked pairs total: 11433 [2022-12-13 16:58:15,498 INFO L136 LiptonReduction]: Total number of compositions: 164 [2022-12-13 16:58:15,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:58:15,512 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;@3a3d91fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:58:15,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 16:58:15,515 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2022-12-13 16:58:15,515 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:58:15,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:15,516 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:58:15,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash 201200932, now seen corresponding path program 1 times [2022-12-13 16:58:15,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:15,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084041342] [2022-12-13 16:58:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:15,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:15,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084041342] [2022-12-13 16:58:15,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084041342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:15,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:58:15,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:58:15,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763869467] [2022-12-13 16:58:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:58:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:15,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:58:15,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:58:15,751 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 347 [2022-12-13 16:58:15,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:15,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:15,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 347 [2022-12-13 16:58:15,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:15,926 INFO L130 PetriNetUnfolder]: 786/1273 cut-off events. [2022-12-13 16:58:15,927 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-12-13 16:58:15,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 1273 events. 786/1273 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4964 event pairs, 290 based on Foata normal form. 0/1003 useless extension candidates. Maximal degree in co-relation 2406. Up to 755 conditions per place. [2022-12-13 16:58:15,938 INFO L137 encePairwiseOnDemand]: 342/347 looper letters, 54 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2022-12-13 16:58:15,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 243 flow [2022-12-13 16:58:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:58:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:58:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2022-12-13 16:58:15,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5408261287223823 [2022-12-13 16:58:15,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2022-12-13 16:58:15,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2022-12-13 16:58:15,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:15,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2022-12-13 16:58:15,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:15,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:15,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:15,966 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 563 transitions. [2022-12-13 16:58:15,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 243 flow [2022-12-13 16:58:15,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 57 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:58:15,971 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 94 flow [2022-12-13 16:58:15,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2022-12-13 16:58:15,976 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2022-12-13 16:58:15,976 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 94 flow [2022-12-13 16:58:15,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:15,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:15,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:15,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:58:15,977 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1853679570, now seen corresponding path program 1 times [2022-12-13 16:58:15,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:15,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479487042] [2022-12-13 16:58:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:15,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:16,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:16,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479487042] [2022-12-13 16:58:16,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479487042] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:16,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:58:16,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:58:16,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757716913] [2022-12-13 16:58:16,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:16,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:58:16,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:58:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:58:16,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 347 [2022-12-13 16:58:16,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:16,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 347 [2022-12-13 16:58:16,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:16,254 INFO L130 PetriNetUnfolder]: 901/1470 cut-off events. [2022-12-13 16:58:16,254 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2022-12-13 16:58:16,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 1470 events. 901/1470 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5944 event pairs, 413 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 2906. Up to 1171 conditions per place. [2022-12-13 16:58:16,260 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 49 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2022-12-13 16:58:16,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 247 flow [2022-12-13 16:58:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:58:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:58:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2022-12-13 16:58:16,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5379442843419788 [2022-12-13 16:58:16,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2022-12-13 16:58:16,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2022-12-13 16:58:16,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:16,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2022-12-13 16:58:16,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,270 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 94 flow. Second operand 3 states and 560 transitions. [2022-12-13 16:58:16,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 247 flow [2022-12-13 16:58:16,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:58:16,272 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 100 flow [2022-12-13 16:58:16,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2022-12-13 16:58:16,273 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2022-12-13 16:58:16,273 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 100 flow [2022-12-13 16:58:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:16,273 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:16,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:58:16,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1012667422, now seen corresponding path program 1 times [2022-12-13 16:58:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:16,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78848639] [2022-12-13 16:58:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:16,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:16,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:16,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78848639] [2022-12-13 16:58:16,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78848639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:16,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:58:16,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:58:16,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451461259] [2022-12-13 16:58:16,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:16,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:58:16,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:58:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:58:16,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 347 [2022-12-13 16:58:16,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:16,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 347 [2022-12-13 16:58:16,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:16,503 INFO L130 PetriNetUnfolder]: 949/1546 cut-off events. [2022-12-13 16:58:16,503 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2022-12-13 16:58:16,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3442 conditions, 1546 events. 949/1546 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6466 event pairs, 681 based on Foata normal form. 52/1406 useless extension candidates. Maximal degree in co-relation 3162. Up to 1413 conditions per place. [2022-12-13 16:58:16,509 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 51 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2022-12-13 16:58:16,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 260 flow [2022-12-13 16:58:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:58:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:58:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2022-12-13 16:58:16,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5341018251681076 [2022-12-13 16:58:16,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2022-12-13 16:58:16,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2022-12-13 16:58:16,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:16,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2022-12-13 16:58:16,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,514 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 100 flow. Second operand 3 states and 556 transitions. [2022-12-13 16:58:16,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 260 flow [2022-12-13 16:58:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:58:16,515 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 118 flow [2022-12-13 16:58:16,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2022-12-13 16:58:16,516 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2022-12-13 16:58:16,516 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 118 flow [2022-12-13 16:58:16,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:16,517 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:16,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:58:16,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:16,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:16,518 INFO L85 PathProgramCache]: Analyzing trace with hash 956754823, now seen corresponding path program 1 times [2022-12-13 16:58:16,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:16,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011413696] [2022-12-13 16:58:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:16,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:16,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:16,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011413696] [2022-12-13 16:58:16,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011413696] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:16,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202456394] [2022-12-13 16:58:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:16,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:16,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:16,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:16,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:58:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:16,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:58:16,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:16,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:16,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202456394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:16,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:16,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-13 16:58:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196082849] [2022-12-13 16:58:16,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:16,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:58:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:58:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:58:16,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 347 [2022-12-13 16:58:16,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 118 flow. Second operand has 10 states, 10 states have (on average 168.6) internal successors, (1686), 10 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:16,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:16,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 347 [2022-12-13 16:58:16,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:17,283 INFO L130 PetriNetUnfolder]: 1781/2900 cut-off events. [2022-12-13 16:58:17,283 INFO L131 PetriNetUnfolder]: For 921/921 co-relation queries the response was YES. [2022-12-13 16:58:17,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6871 conditions, 2900 events. 1781/2900 cut-off events. For 921/921 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13388 event pairs, 353 based on Foata normal form. 48/2574 useless extension candidates. Maximal degree in co-relation 6392. Up to 881 conditions per place. [2022-12-13 16:58:17,293 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 150 selfloop transitions, 17 changer transitions 0/167 dead transitions. [2022-12-13 16:58:17,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 167 transitions, 805 flow [2022-12-13 16:58:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:58:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 16:58:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1651 transitions. [2022-12-13 16:58:17,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5286583413384566 [2022-12-13 16:58:17,296 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1651 transitions. [2022-12-13 16:58:17,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1651 transitions. [2022-12-13 16:58:17,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:17,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1651 transitions. [2022-12-13 16:58:17,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.44444444444446) internal successors, (1651), 9 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,302 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,302 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 118 flow. Second operand 9 states and 1651 transitions. [2022-12-13 16:58:17,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 167 transitions, 805 flow [2022-12-13 16:58:17,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 167 transitions, 793 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:58:17,306 INFO L231 Difference]: Finished difference. Result has 49 places, 52 transitions, 236 flow [2022-12-13 16:58:17,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=236, PETRI_PLACES=49, PETRI_TRANSITIONS=52} [2022-12-13 16:58:17,307 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2022-12-13 16:58:17,307 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 52 transitions, 236 flow [2022-12-13 16:58:17,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 168.6) internal successors, (1686), 10 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:17,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:17,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:58:17,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:17,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:17,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1102403989, now seen corresponding path program 1 times [2022-12-13 16:58:17,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:17,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165609599] [2022-12-13 16:58:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:17,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:17,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:17,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165609599] [2022-12-13 16:58:17,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165609599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:17,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:58:17,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:58:17,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505730946] [2022-12-13 16:58:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:17,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:58:17,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:58:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:58:17,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 347 [2022-12-13 16:58:17,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:17,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 347 [2022-12-13 16:58:17,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:17,722 INFO L130 PetriNetUnfolder]: 628/1145 cut-off events. [2022-12-13 16:58:17,722 INFO L131 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2022-12-13 16:58:17,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2795 conditions, 1145 events. 628/1145 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4728 event pairs, 98 based on Foata normal form. 0/1065 useless extension candidates. Maximal degree in co-relation 2288. Up to 896 conditions per place. [2022-12-13 16:58:17,725 INFO L137 encePairwiseOnDemand]: 342/347 looper letters, 49 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2022-12-13 16:58:17,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 318 flow [2022-12-13 16:58:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:58:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:58:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2022-12-13 16:58:17,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5206532180595581 [2022-12-13 16:58:17,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2022-12-13 16:58:17,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2022-12-13 16:58:17,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:17,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2022-12-13 16:58:17,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,730 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 236 flow. Second operand 3 states and 542 transitions. [2022-12-13 16:58:17,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 318 flow [2022-12-13 16:58:17,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 316 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 16:58:17,732 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 197 flow [2022-12-13 16:58:17,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-12-13 16:58:17,733 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2022-12-13 16:58:17,733 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 197 flow [2022-12-13 16:58:17,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:17,733 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:17,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:58:17,733 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1642759632, now seen corresponding path program 1 times [2022-12-13 16:58:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:17,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164809458] [2022-12-13 16:58:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:17,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:17,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164809458] [2022-12-13 16:58:17,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164809458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:17,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:58:17,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:58:17,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453106509] [2022-12-13 16:58:17,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:17,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:58:17,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:58:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:58:17,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 347 [2022-12-13 16:58:17,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:17,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:17,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 347 [2022-12-13 16:58:17,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:18,049 INFO L130 PetriNetUnfolder]: 736/1341 cut-off events. [2022-12-13 16:58:18,049 INFO L131 PetriNetUnfolder]: For 369/369 co-relation queries the response was YES. [2022-12-13 16:58:18,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3418 conditions, 1341 events. 736/1341 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5534 event pairs, 218 based on Foata normal form. 12/1353 useless extension candidates. Maximal degree in co-relation 2790. Up to 525 conditions per place. [2022-12-13 16:58:18,053 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 77 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2022-12-13 16:58:18,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 89 transitions, 507 flow [2022-12-13 16:58:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:58:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:58:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 907 transitions. [2022-12-13 16:58:18,055 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5227665706051873 [2022-12-13 16:58:18,055 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 907 transitions. [2022-12-13 16:58:18,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 907 transitions. [2022-12-13 16:58:18,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:18,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 907 transitions. [2022-12-13 16:58:18,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.4) internal successors, (907), 5 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:18,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:18,059 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:18,059 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 197 flow. Second operand 5 states and 907 transitions. [2022-12-13 16:58:18,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 89 transitions, 507 flow [2022-12-13 16:58:18,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 89 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:58:18,062 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 252 flow [2022-12-13 16:58:18,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2022-12-13 16:58:18,062 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2022-12-13 16:58:18,062 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 252 flow [2022-12-13 16:58:18,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:18,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:18,063 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:18,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:58:18,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1412690712, now seen corresponding path program 1 times [2022-12-13 16:58:18,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:18,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24367894] [2022-12-13 16:58:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:18,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:18,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:18,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24367894] [2022-12-13 16:58:18,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24367894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:18,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:58:18,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 16:58:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721639972] [2022-12-13 16:58:18,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:18,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 16:58:18,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 16:58:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:58:19,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 347 [2022-12-13 16:58:19,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 252 flow. Second operand has 14 states, 14 states have (on average 144.57142857142858) internal successors, (2024), 14 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:19,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:19,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 347 [2022-12-13 16:58:19,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:20,797 INFO L130 PetriNetUnfolder]: 1130/2070 cut-off events. [2022-12-13 16:58:20,797 INFO L131 PetriNetUnfolder]: For 1192/1192 co-relation queries the response was YES. [2022-12-13 16:58:20,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5320 conditions, 2070 events. 1130/2070 cut-off events. For 1192/1192 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 9614 event pairs, 224 based on Foata normal form. 20/2072 useless extension candidates. Maximal degree in co-relation 3300. Up to 1168 conditions per place. [2022-12-13 16:58:20,804 INFO L137 encePairwiseOnDemand]: 329/347 looper letters, 140 selfloop transitions, 34 changer transitions 4/178 dead transitions. [2022-12-13 16:58:20,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 178 transitions, 1012 flow [2022-12-13 16:58:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:58:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:58:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3167 transitions. [2022-12-13 16:58:20,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346095787017977 [2022-12-13 16:58:20,809 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3167 transitions. [2022-12-13 16:58:20,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3167 transitions. [2022-12-13 16:58:20,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:20,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3167 transitions. [2022-12-13 16:58:20,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 150.8095238095238) internal successors, (3167), 21 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:20,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:20,822 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:20,822 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 252 flow. Second operand 21 states and 3167 transitions. [2022-12-13 16:58:20,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 178 transitions, 1012 flow [2022-12-13 16:58:20,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 178 transitions, 996 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:58:20,826 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 561 flow [2022-12-13 16:58:20,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=561, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2022-12-13 16:58:20,827 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 54 predicate places. [2022-12-13 16:58:20,827 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 561 flow [2022-12-13 16:58:20,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 144.57142857142858) internal successors, (2024), 14 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:20,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:20,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:20,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:58:20,829 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:20,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1996876150, now seen corresponding path program 2 times [2022-12-13 16:58:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:20,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451222185] [2022-12-13 16:58:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:20,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:21,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451222185] [2022-12-13 16:58:21,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451222185] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:21,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:58:21,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 16:58:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946014200] [2022-12-13 16:58:21,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:21,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 16:58:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:21,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 16:58:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-12-13 16:58:22,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 16:58:22,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 561 flow. Second operand has 15 states, 15 states have (on average 141.46666666666667) internal successors, (2122), 15 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:22,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:22,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 16:58:22,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:23,641 INFO L130 PetriNetUnfolder]: 1518/2789 cut-off events. [2022-12-13 16:58:23,641 INFO L131 PetriNetUnfolder]: For 3107/3107 co-relation queries the response was YES. [2022-12-13 16:58:23,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8562 conditions, 2789 events. 1518/2789 cut-off events. For 3107/3107 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 13547 event pairs, 448 based on Foata normal form. 10/2769 useless extension candidates. Maximal degree in co-relation 6844. Up to 1724 conditions per place. [2022-12-13 16:58:23,653 INFO L137 encePairwiseOnDemand]: 330/347 looper letters, 141 selfloop transitions, 27 changer transitions 3/171 dead transitions. [2022-12-13 16:58:23,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 171 transitions, 1258 flow [2022-12-13 16:58:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:58:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 16:58:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1949 transitions. [2022-12-13 16:58:23,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43205497672356463 [2022-12-13 16:58:23,657 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1949 transitions. [2022-12-13 16:58:23,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1949 transitions. [2022-12-13 16:58:23,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:23,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1949 transitions. [2022-12-13 16:58:23,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 149.92307692307693) internal successors, (1949), 13 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:23,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:23,680 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:23,680 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 561 flow. Second operand 13 states and 1949 transitions. [2022-12-13 16:58:23,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 171 transitions, 1258 flow [2022-12-13 16:58:23,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 171 transitions, 1254 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-13 16:58:23,691 INFO L231 Difference]: Finished difference. Result has 107 places, 93 transitions, 761 flow [2022-12-13 16:58:23,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=761, PETRI_PLACES=107, PETRI_TRANSITIONS=93} [2022-12-13 16:58:23,692 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 72 predicate places. [2022-12-13 16:58:23,692 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 93 transitions, 761 flow [2022-12-13 16:58:23,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 141.46666666666667) internal successors, (2122), 15 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:23,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:23,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:23,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:58:23,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1196495842, now seen corresponding path program 3 times [2022-12-13 16:58:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:23,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388502489] [2022-12-13 16:58:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:23,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:24,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:24,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388502489] [2022-12-13 16:58:24,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388502489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:24,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:58:24,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 16:58:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004410178] [2022-12-13 16:58:24,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 16:58:24,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 16:58:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-12-13 16:58:25,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 16:58:25,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 93 transitions, 761 flow. Second operand has 15 states, 15 states have (on average 141.46666666666667) internal successors, (2122), 15 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:25,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:25,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 16:58:25,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:26,440 INFO L130 PetriNetUnfolder]: 1720/3163 cut-off events. [2022-12-13 16:58:26,440 INFO L131 PetriNetUnfolder]: For 4770/4770 co-relation queries the response was YES. [2022-12-13 16:58:26,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10314 conditions, 3163 events. 1720/3163 cut-off events. For 4770/4770 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 15750 event pairs, 460 based on Foata normal form. 10/3137 useless extension candidates. Maximal degree in co-relation 8503. Up to 1671 conditions per place. [2022-12-13 16:58:26,462 INFO L137 encePairwiseOnDemand]: 331/347 looper letters, 141 selfloop transitions, 34 changer transitions 3/178 dead transitions. [2022-12-13 16:58:26,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 1458 flow [2022-12-13 16:58:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:58:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 16:58:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1949 transitions. [2022-12-13 16:58:26,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43205497672356463 [2022-12-13 16:58:26,466 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1949 transitions. [2022-12-13 16:58:26,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1949 transitions. [2022-12-13 16:58:26,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:26,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1949 transitions. [2022-12-13 16:58:26,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 149.92307692307693) internal successors, (1949), 13 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:26,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:26,473 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:26,473 INFO L175 Difference]: Start difference. First operand has 107 places, 93 transitions, 761 flow. Second operand 13 states and 1949 transitions. [2022-12-13 16:58:26,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 1458 flow [2022-12-13 16:58:26,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 178 transitions, 1436 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-12-13 16:58:26,488 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 942 flow [2022-12-13 16:58:26,488 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=942, PETRI_PLACES=121, PETRI_TRANSITIONS=101} [2022-12-13 16:58:26,488 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 86 predicate places. [2022-12-13 16:58:26,488 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 942 flow [2022-12-13 16:58:26,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 141.46666666666667) internal successors, (2122), 15 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:26,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:26,489 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:26,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:58:26,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1745535097, now seen corresponding path program 2 times [2022-12-13 16:58:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:26,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653319135] [2022-12-13 16:58:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:26,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:26,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:26,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653319135] [2022-12-13 16:58:26,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653319135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:26,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154786253] [2022-12-13 16:58:26,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:58:26,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:26,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:26,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:26,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:58:26,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:58:26,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:26,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 16:58:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:26,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:58:26,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154786253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:58:26,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:58:26,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-12-13 16:58:26,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852640438] [2022-12-13 16:58:26,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:58:26,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:58:26,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:26,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:58:26,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:58:26,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 347 [2022-12-13 16:58:26,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 101 transitions, 942 flow. Second operand has 7 states, 7 states have (on average 168.71428571428572) internal successors, (1181), 7 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:26,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:26,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 347 [2022-12-13 16:58:26,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:27,246 INFO L130 PetriNetUnfolder]: 1798/3311 cut-off events. [2022-12-13 16:58:27,246 INFO L131 PetriNetUnfolder]: For 6980/6980 co-relation queries the response was YES. [2022-12-13 16:58:27,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11428 conditions, 3311 events. 1798/3311 cut-off events. For 6980/6980 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 16717 event pairs, 705 based on Foata normal form. 12/3287 useless extension candidates. Maximal degree in co-relation 9481. Up to 887 conditions per place. [2022-12-13 16:58:27,268 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 155 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2022-12-13 16:58:27,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 179 transitions, 1733 flow [2022-12-13 16:58:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:58:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 16:58:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1434 transitions. [2022-12-13 16:58:27,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5165706051873199 [2022-12-13 16:58:27,271 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1434 transitions. [2022-12-13 16:58:27,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1434 transitions. [2022-12-13 16:58:27,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:27,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1434 transitions. [2022-12-13 16:58:27,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.25) internal successors, (1434), 8 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:27,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:27,276 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:27,276 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 942 flow. Second operand 8 states and 1434 transitions. [2022-12-13 16:58:27,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 179 transitions, 1733 flow [2022-12-13 16:58:27,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 179 transitions, 1696 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-12-13 16:58:27,293 INFO L231 Difference]: Finished difference. Result has 125 places, 104 transitions, 1027 flow [2022-12-13 16:58:27,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=125, PETRI_TRANSITIONS=104} [2022-12-13 16:58:27,294 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 90 predicate places. [2022-12-13 16:58:27,294 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 104 transitions, 1027 flow [2022-12-13 16:58:27,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.71428571428572) internal successors, (1181), 7 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:27,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:27,294 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:27,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:58:27,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:58:27,496 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:58:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:27,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1648530018, now seen corresponding path program 1 times [2022-12-13 16:58:27,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:27,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490067695] [2022-12-13 16:58:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:27,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:58:27,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:58:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:58:27,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:58:27,582 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:58:27,582 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-12-13 16:58:27,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-12-13 16:58:27,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-12-13 16:58:27,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 16:58:27,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 16:58:27,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 16:58:27,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:58:27,585 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:27,589 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 16:58:27,589 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 16:58:27,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 04:58:27 BasicIcfg [2022-12-13 16:58:27,619 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 16:58:27,619 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 16:58:27,619 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 16:58:27,620 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 16:58:27,620 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:58:12" (3/4) ... [2022-12-13 16:58:27,621 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 16:58:27,657 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 16:58:27,657 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 16:58:27,657 INFO L158 Benchmark]: Toolchain (without parser) took 16390.71ms. Allocated memory was 153.1MB in the beginning and 224.4MB in the end (delta: 71.3MB). Free memory was 116.1MB in the beginning and 63.9MB in the end (delta: 52.3MB). Peak memory consumption was 124.7MB. Max. memory is 16.1GB. [2022-12-13 16:58:27,657 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 16:58:27,657 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.36ms. Allocated memory is still 153.1MB. Free memory was 116.1MB in the beginning and 87.0MB in the end (delta: 29.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-12-13 16:58:27,658 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.62ms. Allocated memory is still 153.1MB. Free memory was 87.0MB in the beginning and 84.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:58:27,658 INFO L158 Benchmark]: Boogie Preprocessor took 19.14ms. Allocated memory is still 153.1MB. Free memory was 84.4MB in the beginning and 82.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:58:27,658 INFO L158 Benchmark]: RCFGBuilder took 403.76ms. Allocated memory is still 153.1MB. Free memory was 82.3MB in the beginning and 115.2MB in the end (delta: -32.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2022-12-13 16:58:27,658 INFO L158 Benchmark]: TraceAbstraction took 15489.94ms. Allocated memory was 153.1MB in the beginning and 224.4MB in the end (delta: 71.3MB). Free memory was 114.5MB in the beginning and 74.3MB in the end (delta: 40.1MB). Peak memory consumption was 110.1MB. Max. memory is 16.1GB. [2022-12-13 16:58:27,658 INFO L158 Benchmark]: Witness Printer took 37.48ms. Allocated memory is still 224.4MB. Free memory was 74.3MB in the beginning and 63.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 16:58:27,659 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.36ms. Allocated memory is still 153.1MB. Free memory was 116.1MB in the beginning and 87.0MB in the end (delta: 29.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.62ms. Allocated memory is still 153.1MB. Free memory was 87.0MB in the beginning and 84.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.14ms. Allocated memory is still 153.1MB. Free memory was 84.4MB in the beginning and 82.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 403.76ms. Allocated memory is still 153.1MB. Free memory was 82.3MB in the beginning and 115.2MB in the end (delta: -32.9MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. * TraceAbstraction took 15489.94ms. Allocated memory was 153.1MB in the beginning and 224.4MB in the end (delta: 71.3MB). Free memory was 114.5MB in the beginning and 74.3MB in the end (delta: 40.1MB). Peak memory consumption was 110.1MB. Max. memory is 16.1GB. * Witness Printer took 37.48ms. Allocated memory is still 224.4MB. Free memory was 74.3MB in the beginning and 63.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 168 PlacesBefore, 35 PlacesAfterwards, 171 TransitionsBefore, 33 TransitionsAfterwards, 9552 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 102 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 24 ConcurrentYvCompositions, 5 ChoiceCompositions, 164 TotalNumberOfCompositions, 11433 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9316, independent: 9134, independent conditional: 0, independent unconditional: 9134, dependent: 182, dependent conditional: 0, dependent unconditional: 182, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5496, independent: 5439, independent conditional: 0, independent unconditional: 5439, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9316, independent: 3695, independent conditional: 0, independent unconditional: 3695, dependent: 125, dependent conditional: 0, dependent unconditional: 125, unknown: 5496, unknown conditional: 0, unknown unconditional: 5496] , Statistics on independence cache: Total cache size (in pairs): 189, Positive cache size: 172, Positive conditional cache size: 0, Positive unconditional cache size: 172, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-1, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=0, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L962] COND FALSE 1 !(top==(5)) VAL [\old(x)=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=0] [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x VAL [\old(x)=0, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=0] [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 292 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 15.3s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2329 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2055 mSDsluCounter, 4444 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4426 mSDsCounter, 81 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12932 IncrementalHoareTripleChecker+Invalid, 13013 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 81 mSolverCounterUnsat, 18 mSDtfsCounter, 12932 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1027occurred in iteration=10, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 232 NumberOfCodeBlocks, 232 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 207 ConstructedInterpolants, 0 QuantifiedInterpolants, 1704 SizeOfPredicates, 5 NumberOfNonLiveVariables, 466 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 11/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 16:58:27,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d76a60b6-9b3c-4be5-a1d9-f3195b9fea41/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE