./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc --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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- 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-5e519f3 [2022-11-02 20:34:42,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:34:42,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:34:42,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:34:42,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:34:42,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:34:42,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:34:42,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:34:42,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:34:42,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:34:42,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:34:42,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:34:42,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:34:42,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:34:42,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:34:42,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:34:42,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:34:42,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:34:42,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:34:42,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:34:42,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:34:42,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:34:42,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:34:42,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:34:42,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:34:42,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:34:42,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:34:42,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:34:42,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:34:42,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:34:42,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:34:42,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:34:42,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:34:42,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:34:42,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:34:42,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:34:42,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:34:42,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:34:42,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:34:42,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:34:42,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:34:42,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:34:42,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:34:42,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:34:42,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:34:42,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:34:42,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:34:42,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:34:42,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:34:42,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:34:42,990 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:34:42,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:34:42,991 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:34:42,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:34:42,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:34:42,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:34:42,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:34:42,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:34:42,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:34:42,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:34:42,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:34:42,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:34:42,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:34:42,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:34:42,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:34:42,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:34:42,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:34:42,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:34:42,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:34:42,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:34:42,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:34:42,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:34:42,994 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:34:42,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:34:42,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:34:42,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2022-11-02 20:34:43,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:34:43,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:34:43,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:34:43,299 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:34:43,300 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:34:43,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-11-02 20:34:43,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/data/dcd08140d/feea7d07af7c4d008ef6f5983698092a/FLAG1a74badb0 [2022-11-02 20:34:44,026 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:34:44,026 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-11-02 20:34:44,047 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/data/dcd08140d/feea7d07af7c4d008ef6f5983698092a/FLAG1a74badb0 [2022-11-02 20:34:44,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/data/dcd08140d/feea7d07af7c4d008ef6f5983698092a [2022-11-02 20:34:44,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:34:44,280 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:34:44,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:34:44,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:34:44,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:34:44,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:34:44" (1/1) ... [2022-11-02 20:34:44,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3eff18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:44, skipping insertion in model container [2022-11-02 20:34:44,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:34:44" (1/1) ... [2022-11-02 20:34:44,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:34:44,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:34:44,990 WARN L230 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_bf120eba-cca4-47a3-a6d9-51121fbefaac/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-11-02 20:34:45,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:34:45,057 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:34:45,110 WARN L230 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_bf120eba-cca4-47a3-a6d9-51121fbefaac/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-11-02 20:34:45,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:34:45,203 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:34:45,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45 WrapperNode [2022-11-02 20:34:45,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:34:45,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:34:45,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:34:45,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:34:45,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,293 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 189 [2022-11-02 20:34:45,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:34:45,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:34:45,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:34:45,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:34:45,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,349 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:34:45,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:34:45,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:34:45,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:34:45,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (1/1) ... [2022-11-02 20:34:45,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:34:45,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:45,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:34:45,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:34:45,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:34:45,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:34:45,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:34:45,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:34:45,452 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:34:45,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:34:45,452 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-02 20:34:45,452 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-02 20:34:45,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:34:45,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:34:45,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:34:45,454 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:34:45,699 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:34:45,702 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:34:46,035 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:34:46,068 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:34:46,069 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-02 20:34:46,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:34:46 BoogieIcfgContainer [2022-11-02 20:34:46,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:34:46,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:34:46,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:34:46,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:34:46,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:34:44" (1/3) ... [2022-11-02 20:34:46,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ecbbaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:34:46, skipping insertion in model container [2022-11-02 20:34:46,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:34:45" (2/3) ... [2022-11-02 20:34:46,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ecbbaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:34:46, skipping insertion in model container [2022-11-02 20:34:46,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:34:46" (3/3) ... [2022-11-02 20:34:46,107 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2022-11-02 20:34:46,116 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:34:46,135 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:34:46,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:34:46,135 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:34:46,198 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-02 20:34:46,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 408 flow [2022-11-02 20:34:46,328 INFO L130 PetriNetUnfolder]: 45/272 cut-off events. [2022-11-02 20:34:46,328 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-02 20:34:46,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 272 events. 45/272 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 848 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-11-02 20:34:46,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 408 flow [2022-11-02 20:34:46,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 395 flow [2022-11-02 20:34:46,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:34:46,360 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;@165dc027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:34:46,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:34:46,387 INFO L130 PetriNetUnfolder]: 12/127 cut-off events. [2022-11-02 20:34:46,387 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:34:46,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:46,388 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:46,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:34:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:46,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2121658482, now seen corresponding path program 1 times [2022-11-02 20:34:46,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:46,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203962101] [2022-11-02 20:34:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:46,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:46,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:46,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203962101] [2022-11-02 20:34:46,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203962101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:46,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:46,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:34:46,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898037610] [2022-11-02 20:34:46,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:46,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:34:46,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:34:46,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:34:46,725 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 200 [2022-11-02 20:34:46,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 395 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:46,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:46,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 200 [2022-11-02 20:34:46,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:46,849 INFO L130 PetriNetUnfolder]: 4/224 cut-off events. [2022-11-02 20:34:46,849 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:34:46,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 224 events. 4/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 629 event pairs, 0 based on Foata normal form. 40/251 useless extension candidates. Maximal degree in co-relation 125. Up to 4 conditions per place. [2022-11-02 20:34:46,857 INFO L137 encePairwiseOnDemand]: 173/200 looper letters, 1 selfloop transitions, 0 changer transitions 1/166 dead transitions. [2022-11-02 20:34:46,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 166 transitions, 339 flow [2022-11-02 20:34:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:34:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:34:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 366 transitions. [2022-11-02 20:34:46,881 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.915 [2022-11-02 20:34:46,882 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 366 transitions. [2022-11-02 20:34:46,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 366 transitions. [2022-11-02 20:34:46,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:46,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 366 transitions. [2022-11-02 20:34:46,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 183.0) internal successors, (366), 2 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:46,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:46,907 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:46,909 INFO L175 Difference]: Start difference. First operand has 168 places, 195 transitions, 395 flow. Second operand 2 states and 366 transitions. [2022-11-02 20:34:46,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 166 transitions, 339 flow [2022-11-02 20:34:46,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 166 transitions, 339 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:34:46,923 INFO L231 Difference]: Finished difference. Result has 167 places, 165 transitions, 335 flow [2022-11-02 20:34:46,926 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=335, PETRI_PLACES=167, PETRI_TRANSITIONS=165} [2022-11-02 20:34:46,930 INFO L287 CegarLoopForPetriNet]: 168 programPoint places, -1 predicate places. [2022-11-02 20:34:46,930 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 165 transitions, 335 flow [2022-11-02 20:34:46,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:46,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:46,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:46,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:34:46,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:34:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash -959674574, now seen corresponding path program 1 times [2022-11-02 20:34:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275122737] [2022-11-02 20:34:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:47,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:47,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275122737] [2022-11-02 20:34:47,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275122737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:47,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:47,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:34:47,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648407684] [2022-11-02 20:34:47,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:47,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:47,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:47,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:47,141 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 200 [2022-11-02 20:34:47,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 165 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:47,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:47,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 200 [2022-11-02 20:34:47,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:47,227 INFO L130 PetriNetUnfolder]: 4/227 cut-off events. [2022-11-02 20:34:47,227 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:34:47,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 227 events. 4/227 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 624 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 242. Up to 9 conditions per place. [2022-11-02 20:34:47,237 INFO L137 encePairwiseOnDemand]: 197/200 looper letters, 10 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-11-02 20:34:47,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 169 transitions, 367 flow [2022-11-02 20:34:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:34:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2022-11-02 20:34:47,241 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8316666666666667 [2022-11-02 20:34:47,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2022-11-02 20:34:47,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2022-11-02 20:34:47,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:47,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2022-11-02 20:34:47,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:47,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:47,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:47,249 INFO L175 Difference]: Start difference. First operand has 167 places, 165 transitions, 335 flow. Second operand 3 states and 499 transitions. [2022-11-02 20:34:47,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 169 transitions, 367 flow [2022-11-02 20:34:47,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 367 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:34:47,258 INFO L231 Difference]: Finished difference. Result has 169 places, 166 transitions, 347 flow [2022-11-02 20:34:47,259 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=169, PETRI_TRANSITIONS=166} [2022-11-02 20:34:47,260 INFO L287 CegarLoopForPetriNet]: 168 programPoint places, 1 predicate places. [2022-11-02 20:34:47,260 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 166 transitions, 347 flow [2022-11-02 20:34:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:47,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:47,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:47,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:34:47,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:34:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1718762197, now seen corresponding path program 1 times [2022-11-02 20:34:47,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:47,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212700828] [2022-11-02 20:34:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:47,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:47,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212700828] [2022-11-02 20:34:47,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212700828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182610910] [2022-11-02 20:34:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:47,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:47,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:47,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:47,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:34:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:34:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:47,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:47,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182610910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:47,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:47,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:34:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32631080] [2022-11-02 20:34:47,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:34:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:34:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:34:47,945 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-11-02 20:34:47,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 166 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:47,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:47,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-11-02 20:34:47,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:48,110 INFO L130 PetriNetUnfolder]: 4/234 cut-off events. [2022-11-02 20:34:48,112 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:34:48,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 234 events. 4/234 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 616 event pairs, 0 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 263. Up to 6 conditions per place. [2022-11-02 20:34:48,115 INFO L137 encePairwiseOnDemand]: 194/200 looper letters, 11 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-11-02 20:34:48,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 176 transitions, 409 flow [2022-11-02 20:34:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:34:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:34:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1471 transitions. [2022-11-02 20:34:48,121 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8172222222222222 [2022-11-02 20:34:48,121 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1471 transitions. [2022-11-02 20:34:48,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1471 transitions. [2022-11-02 20:34:48,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:48,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1471 transitions. [2022-11-02 20:34:48,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.44444444444446) internal successors, (1471), 9 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,132 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,132 INFO L175 Difference]: Start difference. First operand has 169 places, 166 transitions, 347 flow. Second operand 9 states and 1471 transitions. [2022-11-02 20:34:48,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 176 transitions, 409 flow [2022-11-02 20:34:48,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 176 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:34:48,141 INFO L231 Difference]: Finished difference. Result has 179 places, 172 transitions, 395 flow [2022-11-02 20:34:48,141 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=395, PETRI_PLACES=179, PETRI_TRANSITIONS=172} [2022-11-02 20:34:48,144 INFO L287 CegarLoopForPetriNet]: 168 programPoint places, 11 predicate places. [2022-11-02 20:34:48,144 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 172 transitions, 395 flow [2022-11-02 20:34:48,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:48,146 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:48,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:48,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:48,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:34:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:48,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1870049164, now seen corresponding path program 1 times [2022-11-02 20:34:48,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:48,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672699496] [2022-11-02 20:34:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:48,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:34:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:48,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672699496] [2022-11-02 20:34:48,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672699496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:48,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:48,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:34:48,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290611000] [2022-11-02 20:34:48,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:48,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:48,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:48,470 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 200 [2022-11-02 20:34:48,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 172 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:48,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 200 [2022-11-02 20:34:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:48,529 INFO L130 PetriNetUnfolder]: 3/180 cut-off events. [2022-11-02 20:34:48,529 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:34:48,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 180 events. 3/180 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 314 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 218. Up to 6 conditions per place. [2022-11-02 20:34:48,532 INFO L137 encePairwiseOnDemand]: 197/200 looper letters, 8 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2022-11-02 20:34:48,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 174 transitions, 419 flow [2022-11-02 20:34:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:34:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2022-11-02 20:34:48,534 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8283333333333334 [2022-11-02 20:34:48,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2022-11-02 20:34:48,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2022-11-02 20:34:48,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:48,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2022-11-02 20:34:48,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,539 INFO L175 Difference]: Start difference. First operand has 179 places, 172 transitions, 395 flow. Second operand 3 states and 497 transitions. [2022-11-02 20:34:48,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 174 transitions, 419 flow [2022-11-02 20:34:48,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 174 transitions, 413 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-02 20:34:48,545 INFO L231 Difference]: Finished difference. Result has 181 places, 172 transitions, 397 flow [2022-11-02 20:34:48,545 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=181, PETRI_TRANSITIONS=172} [2022-11-02 20:34:48,546 INFO L287 CegarLoopForPetriNet]: 168 programPoint places, 13 predicate places. [2022-11-02 20:34:48,546 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 172 transitions, 397 flow [2022-11-02 20:34:48,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:48,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:48,547 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:48,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:34:48,548 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:34:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2122069387, now seen corresponding path program 2 times [2022-11-02 20:34:48,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:48,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118853963] [2022-11-02 20:34:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:48,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:48,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:48,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118853963] [2022-11-02 20:34:48,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118853963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966005600] [2022-11-02 20:34:48,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:34:48,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:48,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:48,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:48,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:34:48,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:34:48,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:48,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:34:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:49,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:49,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966005600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:49,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:49,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:34:49,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351945540] [2022-11-02 20:34:49,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:49,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:34:49,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:34:49,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:34:49,175 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-11-02 20:34:49,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 172 transitions, 397 flow. Second operand has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:49,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:49,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-11-02 20:34:49,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:49,469 INFO L130 PetriNetUnfolder]: 3/200 cut-off events. [2022-11-02 20:34:49,469 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:34:49,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 200 events. 3/200 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 313 event pairs, 0 based on Foata normal form. 4/198 useless extension candidates. Maximal degree in co-relation 293. Up to 11 conditions per place. [2022-11-02 20:34:49,472 INFO L137 encePairwiseOnDemand]: 194/200 looper letters, 19 selfloop transitions, 21 changer transitions 0/196 dead transitions. [2022-11-02 20:34:49,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 196 transitions, 577 flow [2022-11-02 20:34:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:34:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:34:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3425 transitions. [2022-11-02 20:34:49,480 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8154761904761905 [2022-11-02 20:34:49,481 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3425 transitions. [2022-11-02 20:34:49,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3425 transitions. [2022-11-02 20:34:49,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:49,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3425 transitions. [2022-11-02 20:34:49,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 163.0952380952381) internal successors, (3425), 21 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:49,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:49,500 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:49,500 INFO L175 Difference]: Start difference. First operand has 181 places, 172 transitions, 397 flow. Second operand 21 states and 3425 transitions. [2022-11-02 20:34:49,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 196 transitions, 577 flow [2022-11-02 20:34:49,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 196 transitions, 573 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:34:49,508 INFO L231 Difference]: Finished difference. Result has 204 places, 185 transitions, 523 flow [2022-11-02 20:34:49,508 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=523, PETRI_PLACES=204, PETRI_TRANSITIONS=185} [2022-11-02 20:34:49,511 INFO L287 CegarLoopForPetriNet]: 168 programPoint places, 36 predicate places. [2022-11-02 20:34:49,511 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 185 transitions, 523 flow [2022-11-02 20:34:49,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:49,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:49,515 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:49,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:49,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:49,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:34:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:49,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1016344139, now seen corresponding path program 3 times [2022-11-02 20:34:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:49,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200940605] [2022-11-02 20:34:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:50,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:50,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200940605] [2022-11-02 20:34:50,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200940605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:50,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995587801] [2022-11-02 20:34:50,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:34:50,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:50,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:50,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:50,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:34:50,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:34:50,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:34:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:50,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:34:50,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995587801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:50,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:50,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:34:50,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487697222] [2022-11-02 20:34:50,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:50,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:34:50,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:50,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:34:50,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:34:50,679 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-11-02 20:34:50,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 185 transitions, 523 flow. Second operand has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:50,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:50,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-11-02 20:34:50,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:51,093 INFO L130 PetriNetUnfolder]: 3/215 cut-off events. [2022-11-02 20:34:51,094 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-02 20:34:51,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408 conditions, 215 events. 3/215 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 313 event pairs, 0 based on Foata normal form. 3/212 useless extension candidates. Maximal degree in co-relation 394. Up to 17 conditions per place. [2022-11-02 20:34:51,096 INFO L137 encePairwiseOnDemand]: 194/200 looper letters, 25 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2022-11-02 20:34:51,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 211 transitions, 779 flow [2022-11-02 20:34:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:34:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:34:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4888 transitions. [2022-11-02 20:34:51,107 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8146666666666667 [2022-11-02 20:34:51,107 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4888 transitions. [2022-11-02 20:34:51,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4888 transitions. [2022-11-02 20:34:51,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:51,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4888 transitions. [2022-11-02 20:34:51,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 162.93333333333334) internal successors, (4888), 30 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,158 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,158 INFO L175 Difference]: Start difference. First operand has 204 places, 185 transitions, 523 flow. Second operand 30 states and 4888 transitions. [2022-11-02 20:34:51,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 211 transitions, 779 flow [2022-11-02 20:34:51,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 211 transitions, 749 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-02 20:34:51,165 INFO L231 Difference]: Finished difference. Result has 231 places, 195 transitions, 651 flow [2022-11-02 20:34:51,166 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=651, PETRI_PLACES=231, PETRI_TRANSITIONS=195} [2022-11-02 20:34:51,167 INFO L287 CegarLoopForPetriNet]: 168 programPoint places, 63 predicate places. [2022-11-02 20:34:51,167 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 195 transitions, 651 flow [2022-11-02 20:34:51,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:51,169 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:51,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:51,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:51,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:34:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:51,385 INFO L85 PathProgramCache]: Analyzing trace with hash 282089810, now seen corresponding path program 4 times [2022-11-02 20:34:51,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:51,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607496927] [2022-11-02 20:34:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:51,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:34:51,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:34:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:34:51,519 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:34:51,519 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:34:51,521 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 20:34:51,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 20:34:51,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-02 20:34:51,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 20:34:51,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:34:51,525 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-02 20:34:51,527 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:34:51,527 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:34:51,580 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:34:51,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 568 flow [2022-11-02 20:34:51,644 INFO L130 PetriNetUnfolder]: 75/444 cut-off events. [2022-11-02 20:34:51,645 INFO L131 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-11-02 20:34:51,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 444 events. 75/444 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1734 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 274. Up to 12 conditions per place. [2022-11-02 20:34:51,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 275 transitions, 568 flow [2022-11-02 20:34:51,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 275 transitions, 568 flow [2022-11-02 20:34:51,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:34:51,658 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;@165dc027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:34:51,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:34:51,670 INFO L130 PetriNetUnfolder]: 15/139 cut-off events. [2022-11-02 20:34:51,670 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:34:51,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:51,670 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:51,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:34:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash 510054994, now seen corresponding path program 1 times [2022-11-02 20:34:51,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:51,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517229440] [2022-11-02 20:34:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:51,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517229440] [2022-11-02 20:34:51,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517229440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:51,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:51,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:34:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119798002] [2022-11-02 20:34:51,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:51,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:51,734 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-11-02 20:34:51,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 275 transitions, 568 flow. Second operand has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:51,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-11-02 20:34:51,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:51,851 INFO L130 PetriNetUnfolder]: 9/377 cut-off events. [2022-11-02 20:34:51,851 INFO L131 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-11-02 20:34:51,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 377 events. 9/377 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1433 event pairs, 0 based on Foata normal form. 90/446 useless extension candidates. Maximal degree in co-relation 248. Up to 14 conditions per place. [2022-11-02 20:34:51,856 INFO L137 encePairwiseOnDemand]: 233/275 looper letters, 13 selfloop transitions, 2 changer transitions 1/237 dead transitions. [2022-11-02 20:34:51,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 237 transitions, 522 flow [2022-11-02 20:34:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:34:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2022-11-02 20:34:51,859 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8751515151515151 [2022-11-02 20:34:51,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2022-11-02 20:34:51,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2022-11-02 20:34:51,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:51,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2022-11-02 20:34:51,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,864 INFO L175 Difference]: Start difference. First operand has 235 places, 275 transitions, 568 flow. Second operand 3 states and 722 transitions. [2022-11-02 20:34:51,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 237 transitions, 522 flow [2022-11-02 20:34:51,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 237 transitions, 522 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:34:51,869 INFO L231 Difference]: Finished difference. Result has 235 places, 233 transitions, 494 flow [2022-11-02 20:34:51,870 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=494, PETRI_PLACES=235, PETRI_TRANSITIONS=233} [2022-11-02 20:34:51,871 INFO L287 CegarLoopForPetriNet]: 235 programPoint places, 0 predicate places. [2022-11-02 20:34:51,871 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 233 transitions, 494 flow [2022-11-02 20:34:51,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:51,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:51,872 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:51,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:34:51,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:34:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1078955039, now seen corresponding path program 1 times [2022-11-02 20:34:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011859675] [2022-11-02 20:34:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:51,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:51,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011859675] [2022-11-02 20:34:51,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011859675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031930948] [2022-11-02 20:34:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:51,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:51,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:51,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:51,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:34:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:52,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:34:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:34:52,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:52,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031930948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:52,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:34:52,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:34:52,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291855462] [2022-11-02 20:34:52,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:52,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:52,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:34:52,079 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-11-02 20:34:52,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 233 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:52,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-11-02 20:34:52,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:52,158 INFO L130 PetriNetUnfolder]: 7/331 cut-off events. [2022-11-02 20:34:52,158 INFO L131 PetriNetUnfolder]: For 21/45 co-relation queries the response was YES. [2022-11-02 20:34:52,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 331 events. 7/331 cut-off events. For 21/45 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1131 event pairs, 0 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 336. Up to 16 conditions per place. [2022-11-02 20:34:52,164 INFO L137 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/237 dead transitions. [2022-11-02 20:34:52,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 237 transitions, 532 flow [2022-11-02 20:34:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:34:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-11-02 20:34:52,166 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-11-02 20:34:52,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-11-02 20:34:52,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-11-02 20:34:52,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:52,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-11-02 20:34:52,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,172 INFO L175 Difference]: Start difference. First operand has 235 places, 233 transitions, 494 flow. Second operand 3 states and 682 transitions. [2022-11-02 20:34:52,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 237 transitions, 532 flow [2022-11-02 20:34:52,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 237 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:34:52,177 INFO L231 Difference]: Finished difference. Result has 236 places, 234 transitions, 504 flow [2022-11-02 20:34:52,178 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=504, PETRI_PLACES=236, PETRI_TRANSITIONS=234} [2022-11-02 20:34:52,178 INFO L287 CegarLoopForPetriNet]: 235 programPoint places, 1 predicate places. [2022-11-02 20:34:52,179 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 234 transitions, 504 flow [2022-11-02 20:34:52,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:52,180 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:52,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:52,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:52,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:34:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:52,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1849767997, now seen corresponding path program 1 times [2022-11-02 20:34:52,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:52,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075240404] [2022-11-02 20:34:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:52,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:52,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075240404] [2022-11-02 20:34:52,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075240404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:52,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605580060] [2022-11-02 20:34:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:52,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:52,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:52,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:52,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:34:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:52,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:34:52,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:52,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:52,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605580060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:52,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:52,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:34:52,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276021044] [2022-11-02 20:34:52,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:52,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:34:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:34:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:34:52,697 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-11-02 20:34:52,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 234 transitions, 504 flow. Second operand has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:52,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-11-02 20:34:52,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:52,845 INFO L130 PetriNetUnfolder]: 7/338 cut-off events. [2022-11-02 20:34:52,846 INFO L131 PetriNetUnfolder]: For 20/24 co-relation queries the response was YES. [2022-11-02 20:34:52,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 338 events. 7/338 cut-off events. For 20/24 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1124 event pairs, 0 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 321. Up to 11 conditions per place. [2022-11-02 20:34:52,851 INFO L137 encePairwiseOnDemand]: 269/275 looper letters, 14 selfloop transitions, 9 changer transitions 0/244 dead transitions. [2022-11-02 20:34:52,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 244 transitions, 572 flow [2022-11-02 20:34:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:34:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:34:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2014 transitions. [2022-11-02 20:34:52,858 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8137373737373738 [2022-11-02 20:34:52,858 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2014 transitions. [2022-11-02 20:34:52,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2014 transitions. [2022-11-02 20:34:52,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:52,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2014 transitions. [2022-11-02 20:34:52,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.77777777777777) internal successors, (2014), 9 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,869 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,869 INFO L175 Difference]: Start difference. First operand has 236 places, 234 transitions, 504 flow. Second operand 9 states and 2014 transitions. [2022-11-02 20:34:52,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 244 transitions, 572 flow [2022-11-02 20:34:52,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 244 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:34:52,875 INFO L231 Difference]: Finished difference. Result has 246 places, 240 transitions, 552 flow [2022-11-02 20:34:52,875 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=552, PETRI_PLACES=246, PETRI_TRANSITIONS=240} [2022-11-02 20:34:52,876 INFO L287 CegarLoopForPetriNet]: 235 programPoint places, 11 predicate places. [2022-11-02 20:34:52,877 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 240 transitions, 552 flow [2022-11-02 20:34:52,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:52,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:52,878 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:52,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:53,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:34:53,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:34:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:53,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1597542211, now seen corresponding path program 2 times [2022-11-02 20:34:53,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:53,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996101511] [2022-11-02 20:34:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:53,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:53,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:53,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996101511] [2022-11-02 20:34:53,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996101511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:53,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029008235] [2022-11-02 20:34:53,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:34:53,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:53,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:53,289 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:53,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:34:53,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:34:53,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:53,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:34:53,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:53,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:53,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029008235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:53,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:53,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:34:53,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433679939] [2022-11-02 20:34:53,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:53,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:34:53,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:53,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:34:53,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:34:53,573 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-11-02 20:34:53,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 240 transitions, 552 flow. Second operand has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:53,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:53,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-11-02 20:34:53,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:53,854 INFO L130 PetriNetUnfolder]: 7/358 cut-off events. [2022-11-02 20:34:53,854 INFO L131 PetriNetUnfolder]: For 40/44 co-relation queries the response was YES. [2022-11-02 20:34:53,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 358 events. 7/358 cut-off events. For 40/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1125 event pairs, 0 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 325. Up to 11 conditions per place. [2022-11-02 20:34:53,860 INFO L137 encePairwiseOnDemand]: 269/275 looper letters, 22 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2022-11-02 20:34:53,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 264 transitions, 746 flow [2022-11-02 20:34:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:34:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:34:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4688 transitions. [2022-11-02 20:34:53,893 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8117748917748918 [2022-11-02 20:34:53,894 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4688 transitions. [2022-11-02 20:34:53,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4688 transitions. [2022-11-02 20:34:53,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:53,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4688 transitions. [2022-11-02 20:34:53,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 223.23809523809524) internal successors, (4688), 21 states have internal predecessors, (4688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:53,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:53,920 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:53,921 INFO L175 Difference]: Start difference. First operand has 246 places, 240 transitions, 552 flow. Second operand 21 states and 4688 transitions. [2022-11-02 20:34:53,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 264 transitions, 746 flow [2022-11-02 20:34:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 264 transitions, 732 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:34:53,928 INFO L231 Difference]: Finished difference. Result has 270 places, 253 transitions, 676 flow [2022-11-02 20:34:53,929 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=676, PETRI_PLACES=270, PETRI_TRANSITIONS=253} [2022-11-02 20:34:53,930 INFO L287 CegarLoopForPetriNet]: 235 programPoint places, 35 predicate places. [2022-11-02 20:34:53,931 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 253 transitions, 676 flow [2022-11-02 20:34:53,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:53,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:53,932 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:53,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:54,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:54,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:34:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash -755629635, now seen corresponding path program 3 times [2022-11-02 20:34:54,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:54,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404418250] [2022-11-02 20:34:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:54,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:54,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:54,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404418250] [2022-11-02 20:34:54,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404418250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:54,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612263700] [2022-11-02 20:34:54,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:34:54,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:54,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:54,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:54,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:34:54,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:34:54,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:54,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:34:54,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:54,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:34:55,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612263700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:55,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:55,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:34:55,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630078655] [2022-11-02 20:34:55,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:34:55,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:55,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:34:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:34:55,105 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-11-02 20:34:55,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 253 transitions, 676 flow. Second operand has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:55,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:55,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-11-02 20:34:55,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:55,557 INFO L130 PetriNetUnfolder]: 7/373 cut-off events. [2022-11-02 20:34:55,558 INFO L131 PetriNetUnfolder]: For 128/132 co-relation queries the response was YES. [2022-11-02 20:34:55,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 373 events. 7/373 cut-off events. For 128/132 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1124 event pairs, 0 based on Foata normal form. 3/362 useless extension candidates. Maximal degree in co-relation 409. Up to 17 conditions per place. [2022-11-02 20:34:55,564 INFO L137 encePairwiseOnDemand]: 269/275 looper letters, 28 selfloop transitions, 30 changer transitions 0/279 dead transitions. [2022-11-02 20:34:55,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 279 transitions, 938 flow [2022-11-02 20:34:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:34:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:34:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6691 transitions. [2022-11-02 20:34:55,575 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.811030303030303 [2022-11-02 20:34:55,575 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6691 transitions. [2022-11-02 20:34:55,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6691 transitions. [2022-11-02 20:34:55,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:55,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6691 transitions. [2022-11-02 20:34:55,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 223.03333333333333) internal successors, (6691), 30 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:55,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:55,614 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:55,615 INFO L175 Difference]: Start difference. First operand has 270 places, 253 transitions, 676 flow. Second operand 30 states and 6691 transitions. [2022-11-02 20:34:55,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 279 transitions, 938 flow [2022-11-02 20:34:55,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 279 transitions, 908 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-02 20:34:55,622 INFO L231 Difference]: Finished difference. Result has 297 places, 263 transitions, 804 flow [2022-11-02 20:34:55,623 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=804, PETRI_PLACES=297, PETRI_TRANSITIONS=263} [2022-11-02 20:34:55,624 INFO L287 CegarLoopForPetriNet]: 235 programPoint places, 62 predicate places. [2022-11-02 20:34:55,624 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 263 transitions, 804 flow [2022-11-02 20:34:55,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:55,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:55,626 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:55,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:55,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:34:55,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:34:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:55,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1849066191, now seen corresponding path program 4 times [2022-11-02 20:34:55,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:55,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052608995] [2022-11-02 20:34:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:55,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:34:55,870 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:34:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:34:55,933 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:34:55,934 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:34:55,935 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:34:55,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:34:55,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 20:34:55,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:34:55,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:34:55,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:34:55,936 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-02 20:34:55,937 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:34:55,937 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:34:55,980 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:34:55,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 350 transitions, 730 flow [2022-11-02 20:34:56,098 INFO L130 PetriNetUnfolder]: 110/649 cut-off events. [2022-11-02 20:34:56,098 INFO L131 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-11-02 20:34:56,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 649 events. 110/649 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2841 event pairs, 1 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2022-11-02 20:34:56,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 350 transitions, 730 flow [2022-11-02 20:34:56,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 350 transitions, 730 flow [2022-11-02 20:34:56,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:34:56,122 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;@165dc027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:34:56,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:34:56,132 INFO L130 PetriNetUnfolder]: 15/138 cut-off events. [2022-11-02 20:34:56,133 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:34:56,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:56,133 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:56,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:34:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1471663726, now seen corresponding path program 1 times [2022-11-02 20:34:56,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:56,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799498375] [2022-11-02 20:34:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:56,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799498375] [2022-11-02 20:34:56,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799498375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:56,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:56,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:34:56,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922900402] [2022-11-02 20:34:56,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:56,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:34:56,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:56,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:34:56,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:34:56,156 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 350 [2022-11-02 20:34:56,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 350 transitions, 730 flow. Second operand has 2 states, 2 states have (on average 289.5) internal successors, (579), 2 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:56,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 350 [2022-11-02 20:34:56,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:56,321 INFO L130 PetriNetUnfolder]: 16/548 cut-off events. [2022-11-02 20:34:56,321 INFO L131 PetriNetUnfolder]: For 50/59 co-relation queries the response was YES. [2022-11-02 20:34:56,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 548 events. 16/548 cut-off events. For 50/59 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2478 event pairs, 1 based on Foata normal form. 208/725 useless extension candidates. Maximal degree in co-relation 387. Up to 16 conditions per place. [2022-11-02 20:34:56,331 INFO L137 encePairwiseOnDemand]: 299/350 looper letters, 6 selfloop transitions, 0 changer transitions 1/295 dead transitions. [2022-11-02 20:34:56,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 295 transitions, 632 flow [2022-11-02 20:34:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:34:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:34:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 635 transitions. [2022-11-02 20:34:56,334 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9071428571428571 [2022-11-02 20:34:56,334 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 635 transitions. [2022-11-02 20:34:56,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 635 transitions. [2022-11-02 20:34:56,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:56,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 635 transitions. [2022-11-02 20:34:56,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 317.5) internal successors, (635), 2 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,339 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,340 INFO L175 Difference]: Start difference. First operand has 298 places, 350 transitions, 730 flow. Second operand 2 states and 635 transitions. [2022-11-02 20:34:56,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 295 transitions, 632 flow [2022-11-02 20:34:56,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 295 transitions, 632 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:34:56,348 INFO L231 Difference]: Finished difference. Result has 295 places, 294 transitions, 618 flow [2022-11-02 20:34:56,349 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=618, PETRI_PLACES=295, PETRI_TRANSITIONS=294} [2022-11-02 20:34:56,349 INFO L287 CegarLoopForPetriNet]: 298 programPoint places, -3 predicate places. [2022-11-02 20:34:56,350 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 294 transitions, 618 flow [2022-11-02 20:34:56,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 289.5) internal successors, (579), 2 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:56,351 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:56,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:34:56,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:34:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:56,352 INFO L85 PathProgramCache]: Analyzing trace with hash -510049709, now seen corresponding path program 1 times [2022-11-02 20:34:56,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:56,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247157772] [2022-11-02 20:34:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:56,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:56,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:56,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247157772] [2022-11-02 20:34:56,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247157772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:56,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:34:56,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:34:56,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820152640] [2022-11-02 20:34:56,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:56,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:56,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:34:56,397 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-11-02 20:34:56,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 294 transitions, 618 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:56,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-11-02 20:34:56,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:56,541 INFO L130 PetriNetUnfolder]: 16/551 cut-off events. [2022-11-02 20:34:56,542 INFO L131 PetriNetUnfolder]: For 50/59 co-relation queries the response was YES. [2022-11-02 20:34:56,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 551 events. 16/551 cut-off events. For 50/59 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2484 event pairs, 1 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 601. Up to 23 conditions per place. [2022-11-02 20:34:56,553 INFO L137 encePairwiseOnDemand]: 347/350 looper letters, 15 selfloop transitions, 2 changer transitions 0/298 dead transitions. [2022-11-02 20:34:56,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 298 transitions, 660 flow [2022-11-02 20:34:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:34:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2022-11-02 20:34:56,558 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8228571428571428 [2022-11-02 20:34:56,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2022-11-02 20:34:56,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2022-11-02 20:34:56,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:56,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2022-11-02 20:34:56,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,564 INFO L175 Difference]: Start difference. First operand has 295 places, 294 transitions, 618 flow. Second operand 3 states and 864 transitions. [2022-11-02 20:34:56,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 298 transitions, 660 flow [2022-11-02 20:34:56,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 298 transitions, 660 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:34:56,571 INFO L231 Difference]: Finished difference. Result has 297 places, 295 transitions, 630 flow [2022-11-02 20:34:56,571 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=297, PETRI_TRANSITIONS=295} [2022-11-02 20:34:56,573 INFO L287 CegarLoopForPetriNet]: 298 programPoint places, -1 predicate places. [2022-11-02 20:34:56,573 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 295 transitions, 630 flow [2022-11-02 20:34:56,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:56,574 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:56,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:34:56,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:34:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:56,575 INFO L85 PathProgramCache]: Analyzing trace with hash -115431363, now seen corresponding path program 1 times [2022-11-02 20:34:56,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:56,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914783784] [2022-11-02 20:34:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:56,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:56,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:56,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914783784] [2022-11-02 20:34:56,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914783784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:56,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013434611] [2022-11-02 20:34:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:56,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:56,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:56,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:56,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:34:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:56,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:34:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:34:56,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:34:56,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013434611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:34:56,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:34:56,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:34:56,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138672621] [2022-11-02 20:34:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:34:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:34:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:34:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:34:56,778 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-11-02 20:34:56,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 295 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:56,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-11-02 20:34:56,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:56,930 INFO L130 PetriNetUnfolder]: 14/506 cut-off events. [2022-11-02 20:34:56,931 INFO L131 PetriNetUnfolder]: For 44/83 co-relation queries the response was YES. [2022-11-02 20:34:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 506 events. 14/506 cut-off events. For 44/83 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2190 event pairs, 1 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 569. Up to 30 conditions per place. [2022-11-02 20:34:56,942 INFO L137 encePairwiseOnDemand]: 347/350 looper letters, 15 selfloop transitions, 2 changer transitions 0/299 dead transitions. [2022-11-02 20:34:56,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 299 transitions, 672 flow [2022-11-02 20:34:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:34:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:34:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2022-11-02 20:34:56,944 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8228571428571428 [2022-11-02 20:34:56,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2022-11-02 20:34:56,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2022-11-02 20:34:56,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:56,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2022-11-02 20:34:56,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,950 INFO L175 Difference]: Start difference. First operand has 297 places, 295 transitions, 630 flow. Second operand 3 states and 864 transitions. [2022-11-02 20:34:56,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 299 transitions, 672 flow [2022-11-02 20:34:56,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 299 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:34:56,957 INFO L231 Difference]: Finished difference. Result has 299 places, 296 transitions, 640 flow [2022-11-02 20:34:56,958 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=640, PETRI_PLACES=299, PETRI_TRANSITIONS=296} [2022-11-02 20:34:56,958 INFO L287 CegarLoopForPetriNet]: 298 programPoint places, 1 predicate places. [2022-11-02 20:34:56,958 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 296 transitions, 640 flow [2022-11-02 20:34:56,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:56,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:56,959 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:56,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:57,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:34:57,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:34:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:57,178 INFO L85 PathProgramCache]: Analyzing trace with hash 417894738, now seen corresponding path program 1 times [2022-11-02 20:34:57,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:57,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496474687] [2022-11-02 20:34:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:34:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496474687] [2022-11-02 20:34:57,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496474687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899507639] [2022-11-02 20:34:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:57,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:57,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:34:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:57,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:34:57,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:34:57,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:34:57,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899507639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:57,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:57,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:34:57,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476482964] [2022-11-02 20:34:57,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:57,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:34:57,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:57,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:34:57,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:34:57,476 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-11-02 20:34:57,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 296 transitions, 640 flow. Second operand has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:57,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:57,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-11-02 20:34:57,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:57,698 INFO L130 PetriNetUnfolder]: 14/513 cut-off events. [2022-11-02 20:34:57,698 INFO L131 PetriNetUnfolder]: For 51/60 co-relation queries the response was YES. [2022-11-02 20:34:57,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 513 events. 14/513 cut-off events. For 51/60 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2185 event pairs, 1 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 584. Up to 20 conditions per place. [2022-11-02 20:34:57,709 INFO L137 encePairwiseOnDemand]: 344/350 looper letters, 16 selfloop transitions, 9 changer transitions 0/306 dead transitions. [2022-11-02 20:34:57,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 306 transitions, 712 flow [2022-11-02 20:34:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:34:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:34:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2556 transitions. [2022-11-02 20:34:57,721 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8114285714285714 [2022-11-02 20:34:57,721 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2556 transitions. [2022-11-02 20:34:57,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2556 transitions. [2022-11-02 20:34:57,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:57,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2556 transitions. [2022-11-02 20:34:57,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:57,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:57,743 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:57,743 INFO L175 Difference]: Start difference. First operand has 299 places, 296 transitions, 640 flow. Second operand 9 states and 2556 transitions. [2022-11-02 20:34:57,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 306 transitions, 712 flow [2022-11-02 20:34:57,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 306 transitions, 710 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:34:57,750 INFO L231 Difference]: Finished difference. Result has 309 places, 302 transitions, 688 flow [2022-11-02 20:34:57,751 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=688, PETRI_PLACES=309, PETRI_TRANSITIONS=302} [2022-11-02 20:34:57,751 INFO L287 CegarLoopForPetriNet]: 298 programPoint places, 11 predicate places. [2022-11-02 20:34:57,752 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 302 transitions, 688 flow [2022-11-02 20:34:57,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:57,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:57,753 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:57,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:57,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:34:57,974 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:34:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash 575842066, now seen corresponding path program 2 times [2022-11-02 20:34:57,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:57,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554757344] [2022-11-02 20:34:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:57,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:34:58,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:58,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554757344] [2022-11-02 20:34:58,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554757344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:58,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619963498] [2022-11-02 20:34:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:34:58,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:58,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:58,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:58,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:34:58,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:34:58,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:58,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:34:58,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:34:58,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:34:58,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619963498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:58,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:58,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-02 20:34:58,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977578802] [2022-11-02 20:34:58,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:58,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:34:58,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:58,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:34:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:34:58,493 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 350 [2022-11-02 20:34:58,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 302 transitions, 688 flow. Second operand has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:58,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:34:58,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 350 [2022-11-02 20:34:58,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:34:58,944 INFO L130 PetriNetUnfolder]: 12/488 cut-off events. [2022-11-02 20:34:58,944 INFO L131 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-11-02 20:34:58,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 488 events. 12/488 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1767 event pairs, 2 based on Foata normal form. 6/473 useless extension candidates. Maximal degree in co-relation 645. Up to 29 conditions per place. [2022-11-02 20:34:58,953 INFO L137 encePairwiseOnDemand]: 339/350 looper letters, 35 selfloop transitions, 26 changer transitions 0/334 dead transitions. [2022-11-02 20:34:58,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 334 transitions, 936 flow [2022-11-02 20:34:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:34:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-02 20:34:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6916 transitions. [2022-11-02 20:34:58,967 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7904 [2022-11-02 20:34:58,968 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6916 transitions. [2022-11-02 20:34:58,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6916 transitions. [2022-11-02 20:34:58,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:34:58,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6916 transitions. [2022-11-02 20:34:58,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 276.64) internal successors, (6916), 25 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:58,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:58,999 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:58,999 INFO L175 Difference]: Start difference. First operand has 309 places, 302 transitions, 688 flow. Second operand 25 states and 6916 transitions. [2022-11-02 20:34:58,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 334 transitions, 936 flow [2022-11-02 20:34:59,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 334 transitions, 922 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:34:59,007 INFO L231 Difference]: Finished difference. Result has 340 places, 318 transitions, 846 flow [2022-11-02 20:34:59,008 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=846, PETRI_PLACES=340, PETRI_TRANSITIONS=318} [2022-11-02 20:34:59,009 INFO L287 CegarLoopForPetriNet]: 298 programPoint places, 42 predicate places. [2022-11-02 20:34:59,009 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 318 transitions, 846 flow [2022-11-02 20:34:59,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:59,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:34:59,011 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:59,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:59,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:34:59,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:34:59,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:59,233 INFO L85 PathProgramCache]: Analyzing trace with hash -302385302, now seen corresponding path program 1 times [2022-11-02 20:34:59,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58533470] [2022-11-02 20:34:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:59,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:59,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58533470] [2022-11-02 20:34:59,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58533470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:59,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495740226] [2022-11-02 20:34:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:59,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:59,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:59,594 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:59,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:34:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:59,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:34:59,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:59,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:00,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495740226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:00,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:35:00,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:35:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935534252] [2022-11-02 20:35:00,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:00,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:35:00,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:35:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:35:00,097 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-11-02 20:35:00,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 318 transitions, 846 flow. Second operand has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:00,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:35:00,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-11-02 20:35:00,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:35:00,609 INFO L130 PetriNetUnfolder]: 12/503 cut-off events. [2022-11-02 20:35:00,609 INFO L131 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-11-02 20:35:00,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 503 events. 12/503 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1763 event pairs, 2 based on Foata normal form. 3/485 useless extension candidates. Maximal degree in co-relation 737. Up to 20 conditions per place. [2022-11-02 20:35:00,621 INFO L137 encePairwiseOnDemand]: 344/350 looper letters, 30 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2022-11-02 20:35:00,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 344 transitions, 1112 flow [2022-11-02 20:35:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:35:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:35:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8493 transitions. [2022-11-02 20:35:00,634 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8088571428571428 [2022-11-02 20:35:00,635 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8493 transitions. [2022-11-02 20:35:00,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8493 transitions. [2022-11-02 20:35:00,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:35:00,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8493 transitions. [2022-11-02 20:35:00,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 283.1) internal successors, (8493), 30 states have internal predecessors, (8493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:00,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:00,669 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:00,669 INFO L175 Difference]: Start difference. First operand has 340 places, 318 transitions, 846 flow. Second operand 30 states and 8493 transitions. [2022-11-02 20:35:00,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 344 transitions, 1112 flow [2022-11-02 20:35:00,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 344 transitions, 1078 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-02 20:35:00,679 INFO L231 Difference]: Finished difference. Result has 366 places, 328 transitions, 970 flow [2022-11-02 20:35:00,679 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=970, PETRI_PLACES=366, PETRI_TRANSITIONS=328} [2022-11-02 20:35:00,680 INFO L287 CegarLoopForPetriNet]: 298 programPoint places, 68 predicate places. [2022-11-02 20:35:00,680 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 328 transitions, 970 flow [2022-11-02 20:35:00,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:00,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:35:00,683 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:00,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:00,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:00,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:35:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:00,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1140146688, now seen corresponding path program 2 times [2022-11-02 20:35:00,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:00,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523032210] [2022-11-02 20:35:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:00,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-02 20:35:01,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523032210] [2022-11-02 20:35:01,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523032210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:01,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:01,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-02 20:35:01,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698218312] [2022-11-02 20:35:01,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:01,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:35:01,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:35:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:35:01,991 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 350 [2022-11-02 20:35:01,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 328 transitions, 970 flow. Second operand has 16 states, 16 states have (on average 230.875) internal successors, (3694), 16 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:01,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:35:01,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 350 [2022-11-02 20:35:01,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:35:54,390 INFO L130 PetriNetUnfolder]: 62497/170320 cut-off events. [2022-11-02 20:35:54,390 INFO L131 PetriNetUnfolder]: For 13726/13745 co-relation queries the response was YES. [2022-11-02 20:35:56,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270610 conditions, 170320 events. 62497/170320 cut-off events. For 13726/13745 co-relation queries the response was YES. Maximal size of possible extension queue 4970. Compared 2523804 event pairs, 41170 based on Foata normal form. 19/157532 useless extension candidates. Maximal degree in co-relation 270587. Up to 61103 conditions per place. [2022-11-02 20:35:57,733 INFO L137 encePairwiseOnDemand]: 332/350 looper letters, 264 selfloop transitions, 31 changer transitions 0/554 dead transitions. [2022-11-02 20:35:57,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 554 transitions, 2255 flow [2022-11-02 20:35:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:35:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-02 20:35:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5327 transitions. [2022-11-02 20:35:57,741 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6918181818181818 [2022-11-02 20:35:57,741 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5327 transitions. [2022-11-02 20:35:57,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5327 transitions. [2022-11-02 20:35:57,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:35:57,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5327 transitions. [2022-11-02 20:35:57,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 242.13636363636363) internal successors, (5327), 22 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:57,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 350.0) internal successors, (8050), 23 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:57,764 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 350.0) internal successors, (8050), 23 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:57,764 INFO L175 Difference]: Start difference. First operand has 366 places, 328 transitions, 970 flow. Second operand 22 states and 5327 transitions. [2022-11-02 20:35:57,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 554 transitions, 2255 flow [2022-11-02 20:35:57,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 554 transitions, 2211 flow, removed 4 selfloop flow, removed 18 redundant places. [2022-11-02 20:35:57,955 INFO L231 Difference]: Finished difference. Result has 379 places, 360 transitions, 1131 flow [2022-11-02 20:35:57,956 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1131, PETRI_PLACES=379, PETRI_TRANSITIONS=360} [2022-11-02 20:35:57,956 INFO L287 CegarLoopForPetriNet]: 298 programPoint places, 81 predicate places. [2022-11-02 20:35:57,956 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 360 transitions, 1131 flow [2022-11-02 20:35:57,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 230.875) internal successors, (3694), 16 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:57,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:35:57,958 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:57,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:35:57,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:35:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:57,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2007247325, now seen corresponding path program 1 times [2022-11-02 20:35:57,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664506521] [2022-11-02 20:35:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:57,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:35:58,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:35:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:35:58,060 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:35:58,060 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:35:58,061 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 20:35:58,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 20:35:58,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 20:35:58,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 20:35:58,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 20:35:58,062 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 20:35:58,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:35:58,062 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-11-02 20:35:58,063 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:35:58,063 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:35:58,113 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 20:35:58,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 361 places, 425 transitions, 894 flow [2022-11-02 20:35:58,374 INFO L130 PetriNetUnfolder]: 157/922 cut-off events. [2022-11-02 20:35:58,374 INFO L131 PetriNetUnfolder]: For 48/54 co-relation queries the response was YES. [2022-11-02 20:35:58,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 922 events. 157/922 cut-off events. For 48/54 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4396 event pairs, 6 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 669. Up to 32 conditions per place. [2022-11-02 20:35:58,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 425 transitions, 894 flow [2022-11-02 20:35:58,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 361 places, 425 transitions, 894 flow [2022-11-02 20:35:58,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:35:58,416 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;@165dc027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:35:58,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 20:35:58,425 INFO L130 PetriNetUnfolder]: 13/130 cut-off events. [2022-11-02 20:35:58,425 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:35:58,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:35:58,425 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:58,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:35:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:58,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1621071729, now seen corresponding path program 1 times [2022-11-02 20:35:58,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:58,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277754447] [2022-11-02 20:35:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:58,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:58,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277754447] [2022-11-02 20:35:58,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277754447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:58,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:58,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:58,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551403234] [2022-11-02 20:35:58,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:58,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:35:58,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:58,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:35:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:35:58,450 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 425 [2022-11-02 20:35:58,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 425 transitions, 894 flow. Second operand has 2 states, 2 states have (on average 350.0) internal successors, (700), 2 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:58,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:35:58,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 425 [2022-11-02 20:35:58,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:35:58,852 INFO L130 PetriNetUnfolder]: 31/787 cut-off events. [2022-11-02 20:35:58,853 INFO L131 PetriNetUnfolder]: For 123/138 co-relation queries the response was YES. [2022-11-02 20:35:58,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 787 events. 31/787 cut-off events. For 123/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3931 event pairs, 6 based on Foata normal form. 481/1223 useless extension candidates. Maximal degree in co-relation 583. Up to 37 conditions per place. [2022-11-02 20:35:58,869 INFO L137 encePairwiseOnDemand]: 362/425 looper letters, 8 selfloop transitions, 0 changer transitions 1/357 dead transitions. [2022-11-02 20:35:58,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 357 transitions, 774 flow [2022-11-02 20:35:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:35:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:35:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 769 transitions. [2022-11-02 20:35:58,872 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9047058823529411 [2022-11-02 20:35:58,872 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 769 transitions. [2022-11-02 20:35:58,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 769 transitions. [2022-11-02 20:35:58,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:35:58,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 769 transitions. [2022-11-02 20:35:58,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 384.5) internal successors, (769), 2 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:58,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:58,875 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:58,876 INFO L175 Difference]: Start difference. First operand has 361 places, 425 transitions, 894 flow. Second operand 2 states and 769 transitions. [2022-11-02 20:35:58,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 357 transitions, 774 flow [2022-11-02 20:35:58,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 357 transitions, 774 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:35:58,882 INFO L231 Difference]: Finished difference. Result has 357 places, 356 transitions, 756 flow [2022-11-02 20:35:58,883 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=756, PETRI_PLACES=357, PETRI_TRANSITIONS=356} [2022-11-02 20:35:58,884 INFO L287 CegarLoopForPetriNet]: 361 programPoint places, -4 predicate places. [2022-11-02 20:35:58,884 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 356 transitions, 756 flow [2022-11-02 20:35:58,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 350.0) internal successors, (700), 2 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:58,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:35:58,885 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:58,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-02 20:35:58,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:35:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:58,886 INFO L85 PathProgramCache]: Analyzing trace with hash -204729741, now seen corresponding path program 1 times [2022-11-02 20:35:58,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:58,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490563668] [2022-11-02 20:35:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:58,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:58,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:58,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490563668] [2022-11-02 20:35:58,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490563668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:58,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:58,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:35:58,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052353904] [2022-11-02 20:35:58,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:58,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:58,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:58,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:58,921 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 425 [2022-11-02 20:35:58,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 356 transitions, 756 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:58,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:35:58,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 425 [2022-11-02 20:35:58,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:35:59,159 INFO L130 PetriNetUnfolder]: 31/790 cut-off events. [2022-11-02 20:35:59,159 INFO L131 PetriNetUnfolder]: For 123/138 co-relation queries the response was YES. [2022-11-02 20:35:59,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 790 events. 31/790 cut-off events. For 123/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3942 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 887. Up to 44 conditions per place. [2022-11-02 20:35:59,182 INFO L137 encePairwiseOnDemand]: 422/425 looper letters, 17 selfloop transitions, 2 changer transitions 0/360 dead transitions. [2022-11-02 20:35:59,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 360 transitions, 802 flow [2022-11-02 20:35:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:35:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-11-02 20:35:59,186 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8203921568627451 [2022-11-02 20:35:59,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-11-02 20:35:59,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-11-02 20:35:59,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:35:59,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-11-02 20:35:59,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,191 INFO L175 Difference]: Start difference. First operand has 357 places, 356 transitions, 756 flow. Second operand 3 states and 1046 transitions. [2022-11-02 20:35:59,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 360 transitions, 802 flow [2022-11-02 20:35:59,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 360 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:35:59,199 INFO L231 Difference]: Finished difference. Result has 359 places, 357 transitions, 768 flow [2022-11-02 20:35:59,199 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=768, PETRI_PLACES=359, PETRI_TRANSITIONS=357} [2022-11-02 20:35:59,200 INFO L287 CegarLoopForPetriNet]: 361 programPoint places, -2 predicate places. [2022-11-02 20:35:59,200 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 357 transitions, 768 flow [2022-11-02 20:35:59,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:35:59,201 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:59,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-02 20:35:59,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:35:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1258974330, now seen corresponding path program 1 times [2022-11-02 20:35:59,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:59,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268301250] [2022-11-02 20:35:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:59,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:59,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268301250] [2022-11-02 20:35:59,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268301250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:35:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254771859] [2022-11-02 20:35:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:59,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:59,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:59,294 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:59,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:35:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:59,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:35:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:35:59,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:59,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254771859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:59,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:35:59,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-02 20:35:59,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419561994] [2022-11-02 20:35:59,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:59,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:35:59,448 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 425 [2022-11-02 20:35:59,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 357 transitions, 768 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:35:59,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 425 [2022-11-02 20:35:59,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:35:59,668 INFO L130 PetriNetUnfolder]: 29/745 cut-off events. [2022-11-02 20:35:59,668 INFO L131 PetriNetUnfolder]: For 113/175 co-relation queries the response was YES. [2022-11-02 20:35:59,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 745 events. 29/745 cut-off events. For 113/175 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3673 event pairs, 6 based on Foata normal form. 1/706 useless extension candidates. Maximal degree in co-relation 860. Up to 56 conditions per place. [2022-11-02 20:35:59,691 INFO L137 encePairwiseOnDemand]: 422/425 looper letters, 17 selfloop transitions, 2 changer transitions 0/361 dead transitions. [2022-11-02 20:35:59,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 361 transitions, 814 flow [2022-11-02 20:35:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:35:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-11-02 20:35:59,695 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8203921568627451 [2022-11-02 20:35:59,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-11-02 20:35:59,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-11-02 20:35:59,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:35:59,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-11-02 20:35:59,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,701 INFO L175 Difference]: Start difference. First operand has 359 places, 357 transitions, 768 flow. Second operand 3 states and 1046 transitions. [2022-11-02 20:35:59,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 361 transitions, 814 flow [2022-11-02 20:35:59,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 361 transitions, 812 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:35:59,709 INFO L231 Difference]: Finished difference. Result has 361 places, 358 transitions, 778 flow [2022-11-02 20:35:59,710 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=778, PETRI_PLACES=361, PETRI_TRANSITIONS=358} [2022-11-02 20:35:59,710 INFO L287 CegarLoopForPetriNet]: 361 programPoint places, 0 predicate places. [2022-11-02 20:35:59,710 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 358 transitions, 778 flow [2022-11-02 20:35:59,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:59,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:35:59,711 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:59,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:59,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:35:59,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:35:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:59,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1713893572, now seen corresponding path program 1 times [2022-11-02 20:35:59,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:59,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115152076] [2022-11-02 20:35:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:36:00,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:00,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115152076] [2022-11-02 20:36:00,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115152076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:00,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12502633] [2022-11-02 20:36:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:00,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:00,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:00,012 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:00,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:36:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:00,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:36:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:36:00,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:36:00,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12502633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:00,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:00,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:36:00,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877560446] [2022-11-02 20:36:00,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:00,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:36:00,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:00,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:36:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:36:00,206 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 425 [2022-11-02 20:36:00,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 358 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 343.1) internal successors, (3431), 10 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:00,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:00,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 425 [2022-11-02 20:36:00,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:00,487 INFO L130 PetriNetUnfolder]: 29/752 cut-off events. [2022-11-02 20:36:00,487 INFO L131 PetriNetUnfolder]: For 124/139 co-relation queries the response was YES. [2022-11-02 20:36:00,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 752 events. 29/752 cut-off events. For 124/139 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3652 event pairs, 6 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 872. Up to 41 conditions per place. [2022-11-02 20:36:00,513 INFO L137 encePairwiseOnDemand]: 419/425 looper letters, 18 selfloop transitions, 9 changer transitions 0/368 dead transitions. [2022-11-02 20:36:00,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 368 transitions, 854 flow [2022-11-02 20:36:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:36:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:36:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3098 transitions. [2022-11-02 20:36:00,518 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8099346405228758 [2022-11-02 20:36:00,518 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3098 transitions. [2022-11-02 20:36:00,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3098 transitions. [2022-11-02 20:36:00,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:00,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3098 transitions. [2022-11-02 20:36:00,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 344.22222222222223) internal successors, (3098), 9 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:00,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:00,530 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:00,530 INFO L175 Difference]: Start difference. First operand has 361 places, 358 transitions, 778 flow. Second operand 9 states and 3098 transitions. [2022-11-02 20:36:00,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 368 transitions, 854 flow [2022-11-02 20:36:00,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 368 transitions, 852 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:36:00,538 INFO L231 Difference]: Finished difference. Result has 371 places, 364 transitions, 826 flow [2022-11-02 20:36:00,539 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=826, PETRI_PLACES=371, PETRI_TRANSITIONS=364} [2022-11-02 20:36:00,539 INFO L287 CegarLoopForPetriNet]: 361 programPoint places, 10 predicate places. [2022-11-02 20:36:00,539 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 364 transitions, 826 flow [2022-11-02 20:36:00,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 343.1) internal successors, (3431), 10 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:00,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:00,541 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:00,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:36:00,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:36:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash -499580700, now seen corresponding path program 2 times [2022-11-02 20:36:00,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:00,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529717274] [2022-11-02 20:36:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:00,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:36:00,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:00,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529717274] [2022-11-02 20:36:00,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529717274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:00,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614333248] [2022-11-02 20:36:00,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:36:00,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:00,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:00,837 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:00,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:36:00,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:36:00,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:36:00,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:36:01,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:36:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614333248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:01,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:01,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-02 20:36:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048515712] [2022-11-02 20:36:01,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:01,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:36:01,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:36:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:36:01,195 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 425 [2022-11-02 20:36:01,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 364 transitions, 826 flow. Second operand has 19 states, 19 states have (on average 337.05263157894734) internal successors, (6404), 19 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:01,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:01,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 425 [2022-11-02 20:36:01,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:01,724 INFO L130 PetriNetUnfolder]: 27/727 cut-off events. [2022-11-02 20:36:01,725 INFO L131 PetriNetUnfolder]: For 134/179 co-relation queries the response was YES. [2022-11-02 20:36:01,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 727 events. 27/727 cut-off events. For 134/179 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3296 event pairs, 7 based on Foata normal form. 6/699 useless extension candidates. Maximal degree in co-relation 939. Up to 56 conditions per place. [2022-11-02 20:36:01,738 INFO L137 encePairwiseOnDemand]: 414/425 looper letters, 37 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2022-11-02 20:36:01,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 396 transitions, 1078 flow [2022-11-02 20:36:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:36:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-02 20:36:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 8418 transitions. [2022-11-02 20:36:01,748 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7922823529411764 [2022-11-02 20:36:01,749 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 8418 transitions. [2022-11-02 20:36:01,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 8418 transitions. [2022-11-02 20:36:01,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:01,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 8418 transitions. [2022-11-02 20:36:01,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 336.72) internal successors, (8418), 25 states have internal predecessors, (8418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:01,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 425.0) internal successors, (11050), 26 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:01,777 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 425.0) internal successors, (11050), 26 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:01,778 INFO L175 Difference]: Start difference. First operand has 371 places, 364 transitions, 826 flow. Second operand 25 states and 8418 transitions. [2022-11-02 20:36:01,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 396 transitions, 1078 flow [2022-11-02 20:36:01,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 396 transitions, 1064 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:36:01,787 INFO L231 Difference]: Finished difference. Result has 402 places, 380 transitions, 984 flow [2022-11-02 20:36:01,787 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=984, PETRI_PLACES=402, PETRI_TRANSITIONS=380} [2022-11-02 20:36:01,793 INFO L287 CegarLoopForPetriNet]: 361 programPoint places, 41 predicate places. [2022-11-02 20:36:01,793 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 380 transitions, 984 flow [2022-11-02 20:36:01,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 337.05263157894734) internal successors, (6404), 19 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:01,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:01,795 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:01,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:02,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:36:02,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:36:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:02,021 INFO L85 PathProgramCache]: Analyzing trace with hash 546551868, now seen corresponding path program 1 times [2022-11-02 20:36:02,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:02,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698928146] [2022-11-02 20:36:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:02,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:02,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:02,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698928146] [2022-11-02 20:36:02,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698928146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:02,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741618577] [2022-11-02 20:36:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:02,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:02,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:02,315 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:02,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:36:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:02,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:36:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:02,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:02,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741618577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:02,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:02,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 20:36:02,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144930900] [2022-11-02 20:36:02,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:02,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:36:02,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:36:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:36:02,844 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 425 [2022-11-02 20:36:02,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 380 transitions, 984 flow. Second operand has 23 states, 23 states have (on average 343.4347826086956) internal successors, (7899), 23 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:02,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:02,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 425 [2022-11-02 20:36:02,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:03,594 INFO L130 PetriNetUnfolder]: 27/742 cut-off events. [2022-11-02 20:36:03,595 INFO L131 PetriNetUnfolder]: For 244/253 co-relation queries the response was YES. [2022-11-02 20:36:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 742 events. 27/742 cut-off events. For 244/253 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3310 event pairs, 7 based on Foata normal form. 3/711 useless extension candidates. Maximal degree in co-relation 1029. Up to 41 conditions per place. [2022-11-02 20:36:03,624 INFO L137 encePairwiseOnDemand]: 419/425 looper letters, 32 selfloop transitions, 30 changer transitions 0/406 dead transitions. [2022-11-02 20:36:03,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 406 transitions, 1254 flow [2022-11-02 20:36:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:36:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:36:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 10295 transitions. [2022-11-02 20:36:03,641 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8074509803921569 [2022-11-02 20:36:03,641 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 10295 transitions. [2022-11-02 20:36:03,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 10295 transitions. [2022-11-02 20:36:03,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:03,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 10295 transitions. [2022-11-02 20:36:03,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 343.1666666666667) internal successors, (10295), 30 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:03,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:03,703 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:03,703 INFO L175 Difference]: Start difference. First operand has 402 places, 380 transitions, 984 flow. Second operand 30 states and 10295 transitions. [2022-11-02 20:36:03,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 406 transitions, 1254 flow [2022-11-02 20:36:03,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 406 transitions, 1220 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-02 20:36:03,718 INFO L231 Difference]: Finished difference. Result has 428 places, 390 transitions, 1108 flow [2022-11-02 20:36:03,719 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1108, PETRI_PLACES=428, PETRI_TRANSITIONS=390} [2022-11-02 20:36:03,720 INFO L287 CegarLoopForPetriNet]: 361 programPoint places, 67 predicate places. [2022-11-02 20:36:03,720 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 390 transitions, 1108 flow [2022-11-02 20:36:03,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 343.4347826086956) internal successors, (7899), 23 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:03,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:03,723 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:03,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:03,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf120eba-cca4-47a3-a6d9-51121fbefaac/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:36:03,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:36:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash 961894633, now seen corresponding path program 2 times [2022-11-02 20:36:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:03,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100450744] [2022-11-02 20:36:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-02 20:36:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100450744] [2022-11-02 20:36:04,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100450744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:04,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:04,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-02 20:36:04,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025316460] [2022-11-02 20:36:04,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:04,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:36:04,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:04,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:36:04,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:36:04,947 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 425 [2022-11-02 20:36:04,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 390 transitions, 1108 flow. Second operand has 15 states, 15 states have (on average 285.0) internal successors, (4275), 15 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:04,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:04,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 425 [2022-11-02 20:36:04,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand