./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --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_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/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_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/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_10dd4d57-14b6-4f12-9eba-41ac1fd17913/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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- 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 20:45:23,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:45:23,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:45:23,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:45:23,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:45:23,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:45:23,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:45:23,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:45:23,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:45:23,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:45:23,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:45:23,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:45:23,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:45:23,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:45:23,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:45:23,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:45:23,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:45:23,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:45:23,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:45:23,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:45:23,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:45:23,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:45:23,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:45:23,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:45:23,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:45:23,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:45:23,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:45:23,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:45:23,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:45:23,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:45:23,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:45:23,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:45:23,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:45:23,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:45:23,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:45:23,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:45:23,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:45:23,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:45:23,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:45:23,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:45:23,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:45:23,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:45:23,943 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:45:23,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:45:23,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:45:23,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:45:23,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:45:23,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:45:23,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:45:23,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:45:23,946 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:45:23,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:45:23,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:45:23,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:45:23,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:45:23,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:45:23,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:45:23,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:45:23,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:45:23,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:45:23,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:45:23,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:45:23,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:45:23,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:45:23,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:45:23,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:45:23,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:45:23,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:45:23,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:45:23,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:45:23,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:45:23,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:45:23,954 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:45:23,954 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:45:23,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:45:23,955 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_10dd4d57-14b6-4f12-9eba-41ac1fd17913/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2022-11-02 20:45:24,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:45:24,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:45:24,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:45:24,240 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:45:24,240 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:45:24,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-02 20:45:24,335 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/data/f62deaa73/486c816c296642948ca2753c3289f4e6/FLAG034e2394c [2022-11-02 20:45:24,756 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:45:24,757 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-02 20:45:24,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/data/f62deaa73/486c816c296642948ca2753c3289f4e6/FLAG034e2394c [2022-11-02 20:45:25,161 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/data/f62deaa73/486c816c296642948ca2753c3289f4e6 [2022-11-02 20:45:25,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:45:25,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:45:25,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:45:25,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:45:25,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:45:25,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b13ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25, skipping insertion in model container [2022-11-02 20:45:25,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:45:25,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:45:25,448 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_10dd4d57-14b6-4f12-9eba-41ac1fd17913/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-11-02 20:45:25,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:45:25,463 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:45:25,506 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_10dd4d57-14b6-4f12-9eba-41ac1fd17913/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-11-02 20:45:25,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:45:25,524 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:45:25,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25 WrapperNode [2022-11-02 20:45:25,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:45:25,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:45:25,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:45:25,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:45:25,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,588 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-11-02 20:45:25,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:45:25,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:45:25,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:45:25,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:45:25,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,630 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:45:25,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:45:25,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:45:25,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:45:25,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (1/1) ... [2022-11-02 20:45:25,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:45:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:25,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:45:25,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:45:25,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:45:25,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:45:25,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:45:25,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:45:25,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:45:25,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 20:45:25,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 20:45:25,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-02 20:45:25,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-02 20:45:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:45:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:45:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:45:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:45:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:45:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:45:25,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:45:25,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:45:25,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:45:25,732 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 20:45:25,832 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:45:25,834 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:45:26,146 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:45:26,268 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:45:26,268 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:45:26,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:45:26 BoogieIcfgContainer [2022-11-02 20:45:26,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:45:26,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:45:26,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:45:26,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:45:26,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:45:25" (1/3) ... [2022-11-02 20:45:26,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605b3fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:45:26, skipping insertion in model container [2022-11-02 20:45:26,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:25" (2/3) ... [2022-11-02 20:45:26,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605b3fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:45:26, skipping insertion in model container [2022-11-02 20:45:26,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:45:26" (3/3) ... [2022-11-02 20:45:26,280 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-02 20:45:26,289 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:45:26,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:45:26,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:45:26,300 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:45:26,384 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 20:45:26,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 294 flow [2022-11-02 20:45:26,509 INFO L130 PetriNetUnfolder]: 10/127 cut-off events. [2022-11-02 20:45:26,509 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:45:26,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 127 events. 10/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2022-11-02 20:45:26,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 131 transitions, 294 flow [2022-11-02 20:45:26,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 114 transitions, 252 flow [2022-11-02 20:45:26,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:45:26,537 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;@40850d85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:45:26,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:45:26,571 INFO L130 PetriNetUnfolder]: 10/113 cut-off events. [2022-11-02 20:45:26,572 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:45:26,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:26,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:26,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash -92340089, now seen corresponding path program 1 times [2022-11-02 20:45:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:26,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360103233] [2022-11-02 20:45:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:26,978 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 20:45:26,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360103233] [2022-11-02 20:45:26,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360103233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:26,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:26,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:45:26,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094532762] [2022-11-02 20:45:26,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:26,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:45:26,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:45:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:45:27,044 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 131 [2022-11-02 20:45:27,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 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 20:45:27,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:27,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 131 [2022-11-02 20:45:27,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:27,122 INFO L130 PetriNetUnfolder]: 16/120 cut-off events. [2022-11-02 20:45:27,122 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:45:27,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 120 events. 16/120 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 18/132 useless extension candidates. Maximal degree in co-relation 98. Up to 25 conditions per place. [2022-11-02 20:45:27,125 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 12 selfloop transitions, 0 changer transitions 2/108 dead transitions. [2022-11-02 20:45:27,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 264 flow [2022-11-02 20:45:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:45:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:45:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2022-11-02 20:45:27,139 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9236641221374046 [2022-11-02 20:45:27,139 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2022-11-02 20:45:27,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2022-11-02 20:45:27,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:27,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2022-11-02 20:45:27,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 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 20:45:27,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 20:45:27,156 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 20:45:27,158 INFO L175 Difference]: Start difference. First operand has 117 places, 114 transitions, 252 flow. Second operand 2 states and 242 transitions. [2022-11-02 20:45:27,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 264 flow [2022-11-02 20:45:27,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-02 20:45:27,166 INFO L231 Difference]: Finished difference. Result has 110 places, 106 transitions, 220 flow [2022-11-02 20:45:27,169 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2022-11-02 20:45:27,172 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, -7 predicate places. [2022-11-02 20:45:27,172 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 220 flow [2022-11-02 20:45:27,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 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 20:45:27,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:27,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:27,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:45:27,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:27,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:27,175 INFO L85 PathProgramCache]: Analyzing trace with hash 274536458, now seen corresponding path program 1 times [2022-11-02 20:45:27,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:27,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985455142] [2022-11-02 20:45:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:27,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:27,580 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 20:45:27,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985455142] [2022-11-02 20:45:27,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985455142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:27,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:27,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:45:27,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012704407] [2022-11-02 20:45:27,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:27,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:45:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:45:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:45:27,587 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2022-11-02 20:45:27,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 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 20:45:27,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:27,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2022-11-02 20:45:27,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:27,736 INFO L130 PetriNetUnfolder]: 23/173 cut-off events. [2022-11-02 20:45:27,736 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-02 20:45:27,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 173 events. 23/173 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 231 event pairs, 0 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 231. Up to 36 conditions per place. [2022-11-02 20:45:27,738 INFO L137 encePairwiseOnDemand]: 123/131 looper letters, 25 selfloop transitions, 3 changer transitions 5/118 dead transitions. [2022-11-02 20:45:27,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 317 flow [2022-11-02 20:45:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:45:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 20:45:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2022-11-02 20:45:27,742 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8259541984732824 [2022-11-02 20:45:27,743 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2022-11-02 20:45:27,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2022-11-02 20:45:27,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:27,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2022-11-02 20:45:27,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 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 20:45:27,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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 20:45:27,750 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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 20:45:27,750 INFO L175 Difference]: Start difference. First operand has 110 places, 106 transitions, 220 flow. Second operand 5 states and 541 transitions. [2022-11-02 20:45:27,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 317 flow [2022-11-02 20:45:27,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 317 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:45:27,754 INFO L231 Difference]: Finished difference. Result has 115 places, 108 transitions, 247 flow [2022-11-02 20:45:27,754 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2022-11-02 20:45:27,755 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, -2 predicate places. [2022-11-02 20:45:27,755 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 247 flow [2022-11-02 20:45:27,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 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 20:45:27,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:27,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:27,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:45:27,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash -575216244, now seen corresponding path program 1 times [2022-11-02 20:45:27,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:27,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934635048] [2022-11-02 20:45:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:27,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:28,310 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 20:45:28,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:28,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934635048] [2022-11-02 20:45:28,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934635048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:28,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817846100] [2022-11-02 20:45:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:28,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:28,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:28,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:45:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:28,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:45:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:29,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:45:29,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817846100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:29,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:45:29,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-02 20:45:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101218130] [2022-11-02 20:45:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:29,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:45:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:45:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:45:29,090 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-11-02 20:45:29,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 247 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 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 20:45:29,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:29,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-11-02 20:45:29,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:29,588 INFO L130 PetriNetUnfolder]: 270/677 cut-off events. [2022-11-02 20:45:29,588 INFO L131 PetriNetUnfolder]: For 152/167 co-relation queries the response was YES. [2022-11-02 20:45:29,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 677 events. 270/677 cut-off events. For 152/167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2932 event pairs, 86 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 1376. Up to 179 conditions per place. [2022-11-02 20:45:29,600 INFO L137 encePairwiseOnDemand]: 121/131 looper letters, 56 selfloop transitions, 12 changer transitions 0/144 dead transitions. [2022-11-02 20:45:29,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 497 flow [2022-11-02 20:45:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:45:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:45:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 986 transitions. [2022-11-02 20:45:29,605 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7526717557251908 [2022-11-02 20:45:29,605 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 986 transitions. [2022-11-02 20:45:29,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 986 transitions. [2022-11-02 20:45:29,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:29,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 986 transitions. [2022-11-02 20:45:29,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 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 20:45:29,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:29,616 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:29,616 INFO L175 Difference]: Start difference. First operand has 115 places, 108 transitions, 247 flow. Second operand 10 states and 986 transitions. [2022-11-02 20:45:29,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 497 flow [2022-11-02 20:45:29,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 144 transitions, 481 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-02 20:45:29,625 INFO L231 Difference]: Finished difference. Result has 121 places, 115 transitions, 301 flow [2022-11-02 20:45:29,625 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=301, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2022-11-02 20:45:29,627 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 4 predicate places. [2022-11-02 20:45:29,628 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 301 flow [2022-11-02 20:45:29,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 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 20:45:29,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:29,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:29,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:29,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 45884938, now seen corresponding path program 2 times [2022-11-02 20:45:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:29,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248069787] [2022-11-02 20:45:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:30,230 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 20:45:30,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:30,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248069787] [2022-11-02 20:45:30,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248069787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676594068] [2022-11-02 20:45:30,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:45:30,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:30,234 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:30,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:45:30,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:45:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:30,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:45:30,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:30,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:45:30,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676594068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:30,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:45:30,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-02 20:45:30,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059407368] [2022-11-02 20:45:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:45:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:45:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:45:30,746 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-11-02 20:45:30,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 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 20:45:30,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:30,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-11-02 20:45:30,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:31,121 INFO L130 PetriNetUnfolder]: 241/544 cut-off events. [2022-11-02 20:45:31,121 INFO L131 PetriNetUnfolder]: For 205/217 co-relation queries the response was YES. [2022-11-02 20:45:31,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 544 events. 241/544 cut-off events. For 205/217 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2033 event pairs, 59 based on Foata normal form. 5/489 useless extension candidates. Maximal degree in co-relation 1235. Up to 169 conditions per place. [2022-11-02 20:45:31,126 INFO L137 encePairwiseOnDemand]: 119/131 looper letters, 47 selfloop transitions, 12 changer transitions 0/135 dead transitions. [2022-11-02 20:45:31,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 135 transitions, 480 flow [2022-11-02 20:45:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:45:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:45:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2022-11-02 20:45:31,129 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7442748091603053 [2022-11-02 20:45:31,129 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2022-11-02 20:45:31,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2022-11-02 20:45:31,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:31,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2022-11-02 20:45:31,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 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 20:45:31,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:31,137 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:31,137 INFO L175 Difference]: Start difference. First operand has 121 places, 115 transitions, 301 flow. Second operand 10 states and 975 transitions. [2022-11-02 20:45:31,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 135 transitions, 480 flow [2022-11-02 20:45:31,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 135 transitions, 473 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:45:31,144 INFO L231 Difference]: Finished difference. Result has 127 places, 114 transitions, 323 flow [2022-11-02 20:45:31,145 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2022-11-02 20:45:31,146 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 10 predicate places. [2022-11-02 20:45:31,146 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 323 flow [2022-11-02 20:45:31,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 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 20:45:31,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:31,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:31,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:31,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:31,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1358218546, now seen corresponding path program 1 times [2022-11-02 20:45:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:31,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28482421] [2022-11-02 20:45:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:31,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28482421] [2022-11-02 20:45:31,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28482421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:31,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:31,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:45:31,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471581586] [2022-11-02 20:45:31,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:31,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:45:31,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:45:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:45:31,721 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-11-02 20:45:31,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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 20:45:31,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:31,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-11-02 20:45:31,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:32,509 INFO L130 PetriNetUnfolder]: 1833/3130 cut-off events. [2022-11-02 20:45:32,509 INFO L131 PetriNetUnfolder]: For 1785/1842 co-relation queries the response was YES. [2022-11-02 20:45:32,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 3130 events. 1833/3130 cut-off events. For 1785/1842 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18003 event pairs, 320 based on Foata normal form. 13/2625 useless extension candidates. Maximal degree in co-relation 7653. Up to 1083 conditions per place. [2022-11-02 20:45:32,539 INFO L137 encePairwiseOnDemand]: 121/131 looper letters, 83 selfloop transitions, 10 changer transitions 2/163 dead transitions. [2022-11-02 20:45:32,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 163 transitions, 682 flow [2022-11-02 20:45:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:45:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:45:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 761 transitions. [2022-11-02 20:45:32,543 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.726145038167939 [2022-11-02 20:45:32,543 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 761 transitions. [2022-11-02 20:45:32,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 761 transitions. [2022-11-02 20:45:32,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:32,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 761 transitions. [2022-11-02 20:45:32,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 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 20:45:32,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 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 20:45:32,552 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 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 20:45:32,552 INFO L175 Difference]: Start difference. First operand has 127 places, 114 transitions, 323 flow. Second operand 8 states and 761 transitions. [2022-11-02 20:45:32,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 163 transitions, 682 flow [2022-11-02 20:45:32,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 163 transitions, 660 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-02 20:45:32,569 INFO L231 Difference]: Finished difference. Result has 130 places, 117 transitions, 357 flow [2022-11-02 20:45:32,570 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=357, PETRI_PLACES=130, PETRI_TRANSITIONS=117} [2022-11-02 20:45:32,573 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2022-11-02 20:45:32,573 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 117 transitions, 357 flow [2022-11-02 20:45:32,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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 20:45:32,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:32,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:32,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:45:32,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1386724926, now seen corresponding path program 2 times [2022-11-02 20:45:32,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:32,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070518915] [2022-11-02 20:45:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:32,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:33,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:33,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070518915] [2022-11-02 20:45:33,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070518915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:33,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:33,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:45:33,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341998929] [2022-11-02 20:45:33,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:33,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:45:33,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:33,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:45:33,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:45:33,049 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-11-02 20:45:33,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 117 transitions, 357 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 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 20:45:33,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:33,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-11-02 20:45:33,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:34,052 INFO L130 PetriNetUnfolder]: 1914/3550 cut-off events. [2022-11-02 20:45:34,052 INFO L131 PetriNetUnfolder]: For 3151/3197 co-relation queries the response was YES. [2022-11-02 20:45:34,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8896 conditions, 3550 events. 1914/3550 cut-off events. For 3151/3197 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22678 event pairs, 721 based on Foata normal form. 32/3203 useless extension candidates. Maximal degree in co-relation 8884. Up to 1069 conditions per place. [2022-11-02 20:45:34,087 INFO L137 encePairwiseOnDemand]: 118/131 looper letters, 92 selfloop transitions, 12 changer transitions 10/182 dead transitions. [2022-11-02 20:45:34,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 182 transitions, 824 flow [2022-11-02 20:45:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:45:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:45:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 946 transitions. [2022-11-02 20:45:34,090 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7221374045801526 [2022-11-02 20:45:34,090 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 946 transitions. [2022-11-02 20:45:34,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 946 transitions. [2022-11-02 20:45:34,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:34,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 946 transitions. [2022-11-02 20:45:34,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.6) internal successors, (946), 10 states have internal predecessors, (946), 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 20:45:34,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:34,097 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:34,097 INFO L175 Difference]: Start difference. First operand has 130 places, 117 transitions, 357 flow. Second operand 10 states and 946 transitions. [2022-11-02 20:45:34,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 182 transitions, 824 flow [2022-11-02 20:45:34,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 810 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-02 20:45:34,105 INFO L231 Difference]: Finished difference. Result has 136 places, 119 transitions, 390 flow [2022-11-02 20:45:34,106 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=136, PETRI_TRANSITIONS=119} [2022-11-02 20:45:34,107 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2022-11-02 20:45:34,107 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 119 transitions, 390 flow [2022-11-02 20:45:34,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 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 20:45:34,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:34,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:34,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:45:34,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash -987665250, now seen corresponding path program 3 times [2022-11-02 20:45:34,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:34,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315584507] [2022-11-02 20:45:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:34,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:34,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:34,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315584507] [2022-11-02 20:45:34,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315584507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:34,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:34,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:45:34,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784189769] [2022-11-02 20:45:34,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:34,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:45:34,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:34,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:45:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:45:34,473 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-11-02 20:45:34,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 119 transitions, 390 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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 20:45:34,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:34,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-11-02 20:45:34,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:35,590 INFO L130 PetriNetUnfolder]: 2215/4208 cut-off events. [2022-11-02 20:45:35,590 INFO L131 PetriNetUnfolder]: For 4090/4090 co-relation queries the response was YES. [2022-11-02 20:45:35,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10952 conditions, 4208 events. 2215/4208 cut-off events. For 4090/4090 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28488 event pairs, 345 based on Foata normal form. 4/3861 useless extension candidates. Maximal degree in co-relation 10938. Up to 1307 conditions per place. [2022-11-02 20:45:35,638 INFO L137 encePairwiseOnDemand]: 119/131 looper letters, 97 selfloop transitions, 17 changer transitions 6/188 dead transitions. [2022-11-02 20:45:35,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 188 transitions, 913 flow [2022-11-02 20:45:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:45:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:45:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 950 transitions. [2022-11-02 20:45:35,642 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7251908396946565 [2022-11-02 20:45:35,642 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 950 transitions. [2022-11-02 20:45:35,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 950 transitions. [2022-11-02 20:45:35,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:35,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 950 transitions. [2022-11-02 20:45:35,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 95.0) internal successors, (950), 10 states have internal predecessors, (950), 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 20:45:35,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:35,650 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:35,650 INFO L175 Difference]: Start difference. First operand has 136 places, 119 transitions, 390 flow. Second operand 10 states and 950 transitions. [2022-11-02 20:45:35,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 188 transitions, 913 flow [2022-11-02 20:45:35,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 188 transitions, 893 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 20:45:35,661 INFO L231 Difference]: Finished difference. Result has 141 places, 125 transitions, 470 flow [2022-11-02 20:45:35,662 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=470, PETRI_PLACES=141, PETRI_TRANSITIONS=125} [2022-11-02 20:45:35,663 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 24 predicate places. [2022-11-02 20:45:35,663 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 125 transitions, 470 flow [2022-11-02 20:45:35,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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 20:45:35,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:35,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:35,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:45:35,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash 349861820, now seen corresponding path program 4 times [2022-11-02 20:45:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:35,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875045557] [2022-11-02 20:45:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:35,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:36,113 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 20:45:36,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:36,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875045557] [2022-11-02 20:45:36,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875045557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:36,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101081057] [2022-11-02 20:45:36,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:45:36,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:36,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:36,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:36,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:45:36,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:45:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:36,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:45:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:36,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:45:36,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101081057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:36,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:45:36,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2022-11-02 20:45:36,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998335379] [2022-11-02 20:45:36,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:36,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:45:36,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:45:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:45:36,606 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-11-02 20:45:36,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 125 transitions, 470 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 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 20:45:36,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:36,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-11-02 20:45:36,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:37,266 INFO L130 PetriNetUnfolder]: 1135/2521 cut-off events. [2022-11-02 20:45:37,266 INFO L131 PetriNetUnfolder]: For 3687/3692 co-relation queries the response was YES. [2022-11-02 20:45:37,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7082 conditions, 2521 events. 1135/2521 cut-off events. For 3687/3692 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17242 event pairs, 212 based on Foata normal form. 0/2270 useless extension candidates. Maximal degree in co-relation 7066. Up to 802 conditions per place. [2022-11-02 20:45:37,292 INFO L137 encePairwiseOnDemand]: 121/131 looper letters, 72 selfloop transitions, 15 changer transitions 0/167 dead transitions. [2022-11-02 20:45:37,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 167 transitions, 863 flow [2022-11-02 20:45:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:45:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:45:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 982 transitions. [2022-11-02 20:45:37,296 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.749618320610687 [2022-11-02 20:45:37,296 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 982 transitions. [2022-11-02 20:45:37,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 982 transitions. [2022-11-02 20:45:37,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:37,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 982 transitions. [2022-11-02 20:45:37,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.2) internal successors, (982), 10 states have internal predecessors, (982), 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 20:45:37,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:37,302 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:37,302 INFO L175 Difference]: Start difference. First operand has 141 places, 125 transitions, 470 flow. Second operand 10 states and 982 transitions. [2022-11-02 20:45:37,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 167 transitions, 863 flow [2022-11-02 20:45:37,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 167 transitions, 845 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-02 20:45:37,312 INFO L231 Difference]: Finished difference. Result has 148 places, 134 transitions, 559 flow [2022-11-02 20:45:37,312 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=559, PETRI_PLACES=148, PETRI_TRANSITIONS=134} [2022-11-02 20:45:37,313 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 31 predicate places. [2022-11-02 20:45:37,313 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 134 transitions, 559 flow [2022-11-02 20:45:37,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 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 20:45:37,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:37,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:37,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:37,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:45:37,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1427859990, now seen corresponding path program 5 times [2022-11-02 20:45:37,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:37,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422926174] [2022-11-02 20:45:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:37,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:37,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422926174] [2022-11-02 20:45:37,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422926174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:37,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:37,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:45:37,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197053380] [2022-11-02 20:45:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:37,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:45:37,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:45:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:45:37,896 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-11-02 20:45:37,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 134 transitions, 559 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 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 20:45:37,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:37,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-11-02 20:45:37,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:39,061 INFO L130 PetriNetUnfolder]: 3235/5708 cut-off events. [2022-11-02 20:45:39,062 INFO L131 PetriNetUnfolder]: For 9069/9069 co-relation queries the response was YES. [2022-11-02 20:45:39,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17628 conditions, 5708 events. 3235/5708 cut-off events. For 9069/9069 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38616 event pairs, 1234 based on Foata normal form. 126/5691 useless extension candidates. Maximal degree in co-relation 17609. Up to 3561 conditions per place. [2022-11-02 20:45:39,140 INFO L137 encePairwiseOnDemand]: 121/131 looper letters, 75 selfloop transitions, 11 changer transitions 11/165 dead transitions. [2022-11-02 20:45:39,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 165 transitions, 881 flow [2022-11-02 20:45:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:45:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:45:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 834 transitions. [2022-11-02 20:45:39,144 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7073791348600509 [2022-11-02 20:45:39,144 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 834 transitions. [2022-11-02 20:45:39,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 834 transitions. [2022-11-02 20:45:39,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:39,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 834 transitions. [2022-11-02 20:45:39,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.66666666666667) internal successors, (834), 9 states have internal predecessors, (834), 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 20:45:39,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 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 20:45:39,151 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 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 20:45:39,151 INFO L175 Difference]: Start difference. First operand has 148 places, 134 transitions, 559 flow. Second operand 9 states and 834 transitions. [2022-11-02 20:45:39,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 165 transitions, 881 flow [2022-11-02 20:45:39,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 165 transitions, 860 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-02 20:45:39,170 INFO L231 Difference]: Finished difference. Result has 151 places, 127 transitions, 490 flow [2022-11-02 20:45:39,171 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=151, PETRI_TRANSITIONS=127} [2022-11-02 20:45:39,172 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 34 predicate places. [2022-11-02 20:45:39,172 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 127 transitions, 490 flow [2022-11-02 20:45:39,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 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 20:45:39,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:39,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:39,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:45:39,173 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1030744706, now seen corresponding path program 1 times [2022-11-02 20:45:39,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:39,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318904636] [2022-11-02 20:45:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:39,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:39,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318904636] [2022-11-02 20:45:39,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318904636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:45:39,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:45:39,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:45:39,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600346679] [2022-11-02 20:45:39,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:45:39,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:45:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:39,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:45:39,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:45:39,623 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-11-02 20:45:39,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 127 transitions, 490 flow. Second operand has 9 states, 9 states have (on average 87.77777777777777) internal successors, (790), 9 states have internal predecessors, (790), 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 20:45:39,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:39,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-11-02 20:45:39,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:40,682 INFO L130 PetriNetUnfolder]: 3144/5376 cut-off events. [2022-11-02 20:45:40,682 INFO L131 PetriNetUnfolder]: For 9891/9975 co-relation queries the response was YES. [2022-11-02 20:45:40,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17323 conditions, 5376 events. 3144/5376 cut-off events. For 9891/9975 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34146 event pairs, 1754 based on Foata normal form. 23/5220 useless extension candidates. Maximal degree in co-relation 17304. Up to 3561 conditions per place. [2022-11-02 20:45:40,744 INFO L137 encePairwiseOnDemand]: 118/131 looper letters, 85 selfloop transitions, 16 changer transitions 7/176 dead transitions. [2022-11-02 20:45:40,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 176 transitions, 1018 flow [2022-11-02 20:45:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:45:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:45:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2022-11-02 20:45:40,747 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7 [2022-11-02 20:45:40,747 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2022-11-02 20:45:40,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2022-11-02 20:45:40,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:40,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2022-11-02 20:45:40,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.7) internal successors, (917), 10 states have internal predecessors, (917), 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 20:45:40,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:40,753 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 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 20:45:40,754 INFO L175 Difference]: Start difference. First operand has 151 places, 127 transitions, 490 flow. Second operand 10 states and 917 transitions. [2022-11-02 20:45:40,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 176 transitions, 1018 flow [2022-11-02 20:45:40,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 176 transitions, 947 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-11-02 20:45:40,775 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 541 flow [2022-11-02 20:45:40,776 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=541, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2022-11-02 20:45:40,777 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 32 predicate places. [2022-11-02 20:45:40,777 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 541 flow [2022-11-02 20:45:40,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.77777777777777) internal successors, (790), 9 states have internal predecessors, (790), 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 20:45:40,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:40,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:40,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:45:40,779 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash 49011984, now seen corresponding path program 2 times [2022-11-02 20:45:40,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:40,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154596499] [2022-11-02 20:45:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:40,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:41,186 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 20:45:41,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154596499] [2022-11-02 20:45:41,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154596499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424327286] [2022-11-02 20:45:41,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:45:41,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:41,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:41,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:41,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:45:41,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:45:41,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:45:41,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:45:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:41,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:41,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424327286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:41,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:41,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-02 20:45:41,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763353936] [2022-11-02 20:45:41,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:41,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:45:41,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:45:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:45:41,671 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-11-02 20:45:41,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 541 flow. Second operand has 15 states, 15 states have (on average 87.66666666666667) internal successors, (1315), 15 states have internal predecessors, (1315), 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 20:45:41,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:41,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-11-02 20:45:41,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:43,975 INFO L130 PetriNetUnfolder]: 6779/11710 cut-off events. [2022-11-02 20:45:43,976 INFO L131 PetriNetUnfolder]: For 22681/22761 co-relation queries the response was YES. [2022-11-02 20:45:44,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39018 conditions, 11710 events. 6779/11710 cut-off events. For 22681/22761 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 86927 event pairs, 807 based on Foata normal form. 770/12231 useless extension candidates. Maximal degree in co-relation 39000. Up to 2809 conditions per place. [2022-11-02 20:45:44,108 INFO L137 encePairwiseOnDemand]: 115/131 looper letters, 195 selfloop transitions, 66 changer transitions 11/339 dead transitions. [2022-11-02 20:45:44,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 339 transitions, 2233 flow [2022-11-02 20:45:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:45:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:45:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1973 transitions. [2022-11-02 20:45:44,168 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7171937477280989 [2022-11-02 20:45:44,168 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1973 transitions. [2022-11-02 20:45:44,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1973 transitions. [2022-11-02 20:45:44,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:44,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1973 transitions. [2022-11-02 20:45:44,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 93.95238095238095) internal successors, (1973), 21 states have internal predecessors, (1973), 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 20:45:44,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 131.0) internal successors, (2882), 22 states have internal predecessors, (2882), 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 20:45:44,182 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 131.0) internal successors, (2882), 22 states have internal predecessors, (2882), 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 20:45:44,182 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 541 flow. Second operand 21 states and 1973 transitions. [2022-11-02 20:45:44,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 339 transitions, 2233 flow [2022-11-02 20:45:44,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 339 transitions, 2202 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-02 20:45:44,211 INFO L231 Difference]: Finished difference. Result has 175 places, 183 transitions, 1224 flow [2022-11-02 20:45:44,211 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1224, PETRI_PLACES=175, PETRI_TRANSITIONS=183} [2022-11-02 20:45:44,212 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 58 predicate places. [2022-11-02 20:45:44,212 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 183 transitions, 1224 flow [2022-11-02 20:45:44,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.66666666666667) internal successors, (1315), 15 states have internal predecessors, (1315), 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 20:45:44,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:44,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:44,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:44,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:44,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1190811234, now seen corresponding path program 1 times [2022-11-02 20:45:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479386231] [2022-11-02 20:45:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:44,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:45:44,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:44,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479386231] [2022-11-02 20:45:44,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479386231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:44,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160170006] [2022-11-02 20:45:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:44,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:44,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:44,660 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:44,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:45:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:44,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:45:44,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:45:44,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:45:45,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160170006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:45,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:45,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-11-02 20:45:45,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827904150] [2022-11-02 20:45:45,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:45,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:45:45,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:45:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:45:45,202 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2022-11-02 20:45:45,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 183 transitions, 1224 flow. Second operand has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 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 20:45:45,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:45,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2022-11-02 20:45:45,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:45:46,333 INFO L130 PetriNetUnfolder]: 1709/5267 cut-off events. [2022-11-02 20:45:46,333 INFO L131 PetriNetUnfolder]: For 54877/55718 co-relation queries the response was YES. [2022-11-02 20:45:46,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22129 conditions, 5267 events. 1709/5267 cut-off events. For 54877/55718 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50478 event pairs, 299 based on Foata normal form. 255/5178 useless extension candidates. Maximal degree in co-relation 22097. Up to 1664 conditions per place. [2022-11-02 20:45:46,409 INFO L137 encePairwiseOnDemand]: 123/131 looper letters, 64 selfloop transitions, 95 changer transitions 4/264 dead transitions. [2022-11-02 20:45:46,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 264 transitions, 2199 flow [2022-11-02 20:45:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:45:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:45:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-11-02 20:45:46,412 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8429661941112323 [2022-11-02 20:45:46,412 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-11-02 20:45:46,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-11-02 20:45:46,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:45:46,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-11-02 20:45:46,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 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 20:45:46,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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 20:45:46,419 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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 20:45:46,419 INFO L175 Difference]: Start difference. First operand has 175 places, 183 transitions, 1224 flow. Second operand 7 states and 773 transitions. [2022-11-02 20:45:46,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 264 transitions, 2199 flow [2022-11-02 20:45:46,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 264 transitions, 2021 flow, removed 68 selfloop flow, removed 8 redundant places. [2022-11-02 20:45:46,488 INFO L231 Difference]: Finished difference. Result has 174 places, 232 transitions, 1935 flow [2022-11-02 20:45:46,488 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1935, PETRI_PLACES=174, PETRI_TRANSITIONS=232} [2022-11-02 20:45:46,491 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 57 predicate places. [2022-11-02 20:45:46,491 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 232 transitions, 1935 flow [2022-11-02 20:45:46,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 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 20:45:46,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:45:46,492 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:46,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 20:45:46,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:46,715 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:45:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash -538331290, now seen corresponding path program 1 times [2022-11-02 20:45:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097858543] [2022-11-02 20:45:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:47,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:47,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097858543] [2022-11-02 20:45:47,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097858543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:47,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283143761] [2022-11-02 20:45:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:47,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:47,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:47,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:45:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:47,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:45:47,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:48,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:48,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283143761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:45:48,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:45:48,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-11-02 20:45:48,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094945469] [2022-11-02 20:45:48,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:48,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:45:48,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:45:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:45:48,495 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-11-02 20:45:48,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 232 transitions, 1935 flow. Second operand has 30 states, 30 states have (on average 86.5) internal successors, (2595), 30 states have internal predecessors, (2595), 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 20:45:48,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:45:48,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-11-02 20:45:48,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:46:10,868 INFO L130 PetriNetUnfolder]: 47713/84686 cut-off events. [2022-11-02 20:46:10,868 INFO L131 PetriNetUnfolder]: For 642154/642164 co-relation queries the response was YES. [2022-11-02 20:46:11,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388562 conditions, 84686 events. 47713/84686 cut-off events. For 642154/642164 co-relation queries the response was YES. Maximal size of possible extension queue 4621. Compared 876224 event pairs, 4902 based on Foata normal form. 5977/90255 useless extension candidates. Maximal degree in co-relation 388529. Up to 15182 conditions per place. [2022-11-02 20:46:11,846 INFO L137 encePairwiseOnDemand]: 114/131 looper letters, 1080 selfloop transitions, 417 changer transitions 30/1594 dead transitions. [2022-11-02 20:46:11,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1594 transitions, 18927 flow [2022-11-02 20:46:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:46:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-02 20:46:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5663 transitions. [2022-11-02 20:46:11,859 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7204834605597964 [2022-11-02 20:46:11,859 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5663 transitions. [2022-11-02 20:46:11,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5663 transitions. [2022-11-02 20:46:11,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:46:11,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5663 transitions. [2022-11-02 20:46:11,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 94.38333333333334) internal successors, (5663), 60 states have internal predecessors, (5663), 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 20:46:11,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 131.0) internal successors, (7991), 61 states have internal predecessors, (7991), 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 20:46:11,887 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 131.0) internal successors, (7991), 61 states have internal predecessors, (7991), 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 20:46:11,888 INFO L175 Difference]: Start difference. First operand has 174 places, 232 transitions, 1935 flow. Second operand 60 states and 5663 transitions. [2022-11-02 20:46:11,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1594 transitions, 18927 flow [2022-11-02 20:46:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1594 transitions, 16995 flow, removed 938 selfloop flow, removed 5 redundant places. [2022-11-02 20:46:17,665 INFO L231 Difference]: Finished difference. Result has 273 places, 598 transitions, 7830 flow [2022-11-02 20:46:17,666 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=7830, PETRI_PLACES=273, PETRI_TRANSITIONS=598} [2022-11-02 20:46:17,667 INFO L287 CegarLoopForPetriNet]: 117 programPoint places, 156 predicate places. [2022-11-02 20:46:17,667 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 598 transitions, 7830 flow [2022-11-02 20:46:17,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.5) internal successors, (2595), 30 states have internal predecessors, (2595), 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 20:46:17,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:46:17,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:17,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:17,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:46:17,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:46:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:17,891 INFO L85 PathProgramCache]: Analyzing trace with hash 853607254, now seen corresponding path program 2 times [2022-11-02 20:46:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:17,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242441836] [2022-11-02 20:46:17,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:17,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:18,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242441836] [2022-11-02 20:46:18,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242441836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:18,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629371288] [2022-11-02 20:46:18,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:46:18,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:18,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:18,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:18,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10dd4d57-14b6-4f12-9eba-41ac1fd17913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:46:18,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:46:18,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:18,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:46:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:46:18,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:46:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:46:19,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629371288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:46:19,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:46:19,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-11-02 20:46:19,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790775481] [2022-11-02 20:46:19,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:46:19,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:46:19,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:46:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:46:19,344 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-11-02 20:46:19,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 598 transitions, 7830 flow. Second operand has 24 states, 24 states have (on average 87.08333333333333) internal successors, (2090), 24 states have internal predecessors, (2090), 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 20:46:19,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:46:19,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-11-02 20:46:19,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand